JP2003277990A - Electrolytic coloring method for aluminum member - Google Patents

Electrolytic coloring method for aluminum member

Info

Publication number
JP2003277990A
JP2003277990A JP2002078340A JP2002078340A JP2003277990A JP 2003277990 A JP2003277990 A JP 2003277990A JP 2002078340 A JP2002078340 A JP 2002078340A JP 2002078340 A JP2002078340 A JP 2002078340A JP 2003277990 A JP2003277990 A JP 2003277990A
Authority
JP
Japan
Prior art keywords
aluminum
based member
treatment liquid
fine pores
time
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2002078340A
Other languages
Japanese (ja)
Inventor
Yoshio Usuki
嘉雄 薄木
Toshihiro Toyomoto
敏弘 豊本
Hitoshi Niimura
仁 新村
Satoru Murakami
哲 村上
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aisin Keikinzoku Co Ltd
Toyota Motor Corp
Original Assignee
Aisin Keikinzoku Co Ltd
Toyota Motor Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Aisin Keikinzoku Co Ltd, Toyota Motor Corp filed Critical Aisin Keikinzoku Co Ltd
Priority to JP2002078340A priority Critical patent/JP2003277990A/en
Publication of JP2003277990A publication Critical patent/JP2003277990A/en
Pending legal-status Critical Current

Links

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrolytic coloring method for an aluminum member which can gradiently change partially different color tones within the same aluminum member. <P>SOLUTION: A first operation to form an anodically oxidized film 3 having micropores 2 on the surface of the aluminum member 1 by impressing a voltage between the aluminum member 1 immersed into a treating liquid and a counter electrode, a second operation to reform the micropores 2 of the film 3 by immersing the aluminum member having the micropores 2 into the same treating liquid as the treating liquid in the first operation or another treating liquid, and a third operation to color the aluminum member 1 by holding a color forming substance in the micropores 2 of the film 3 of the member 1 are carried out. In the second operation, the contact time of the treating liquid and the aluminum member 1 is changed according to the positions of the areas of the aluminum member 1, by which the degree of reforming the micropores 2 of the film 3 is changed according to the positions of the areas of the aluminum member 1. <P>COPYRIGHT: (C)2004,JPO

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】本発明はアルミニウム系部材
の電解着色方法に関する。本発明は例えば車両部品、建
築部品などのアルミニウム系部材の電解着色方法に適用
できる。
TECHNICAL FIELD The present invention relates to a method for electrolytically coloring an aluminum-based member. INDUSTRIAL APPLICABILITY The present invention can be applied to a method for electrolytically coloring aluminum-based members such as vehicle parts and building parts.

【0002】[0002]

【従来の技術】従来、アルミニウム系部材の電解着色方
法として、特開2000ー355795号公報に開示さ
れているように、処理液に浸漬させたアルミニウム系部
材と対極との間に電圧を印加することにより、微細ポア
を有する陽極酸化皮膜をアルミニウム系部材の表面に形
成する操作と、微細ポアを有するアルミニウム系部材を
処理液と同じ処理液に浸漬し、アルミニウム系部材と対
極との間に交流電圧を印加することにより、陽極酸化皮
膜の微細ポアを改質する操作と、アルミニウム系部材の
微細ポアに色形成物質を析出させアルミニウム系部材を
着色する操作と、微細ポアのポア内を中和する操作と、
陰極析出型アクリル樹脂塗料を用いてカチオン電着塗装
する操作とを実施する技術が知られている。
2. Description of the Related Art Conventionally, as a method for electrolytically coloring an aluminum-based member, as disclosed in JP-A-2000-355795, a voltage is applied between an aluminum-based member immersed in a treatment liquid and a counter electrode. By doing so, an operation of forming an anodized film having fine pores on the surface of the aluminum-based member and immersing the aluminum-based member having fine pores in the same treatment liquid as the treatment liquid, and applying an alternating current between the aluminum-based member and the counter electrode Applying a voltage to modify the fine pores of the anodized film, to color the aluminum-based member by depositing a color-forming substance on the fine pores of the aluminum-based member, and to neutralize the inside of the pores Operation to
There is known a technique for performing a cationic electrodeposition coating operation using a cathodic deposition type acrylic resin coating material.

【0003】この技術によれば、アルミニウム系部材は
処理液に一定時間浸漬されており、アルミニウム系部材
に形成されている色調は単一色であり、従って、アルミ
ニウム系部材の部位に応じて色が次第に変化するグラデ
ーション色調が得られるものではない。
According to this technique, the aluminum-based member is immersed in the treatment liquid for a certain time, and the color tone formed on the aluminum-based member is a single color. Therefore, the color of the aluminum-based member varies depending on the part of the aluminum-based member. It is not possible to obtain gradually changing gradation tones.

【0004】更に、特開昭54−163740号公報
(公開1979年)に開示されているように、処理液に
浸漬させたアルミニウム系部材と対極との間に電圧を印
加することにより、微細ポアを有する陽極酸化皮膜をア
ルミニウム系部材の表面に形成する操作と、微細ポアを
有するアルミニウム系部材をチオモリブデン酸アンモニ
ウム水溶液に浸漬し、アルミニウム系部材(陽極)と対
極(陰極)との間に直流電圧を印加することにより、陽
極酸化皮膜の微細ポアにモリブデン化合物を沈着させる
操作とを実施する技術が知られている。この技術によれ
ば、モリブデン化合物を沈着させるときに、アルミニウ
ム系部材(陽極)と対極(陰極)との間に給電する電流
密度を調節するため、陽極酸化皮膜の色調を調整するこ
とができる。但し、アルミニウム系部材に形成されてい
る色調は単一色であり、アルミニウム系部材の部位に応
じて色が次第に変化するグラデーション色調が得られる
ものではない。
Further, as disclosed in Japanese Patent Application Laid-Open No. 54-163740 (published in 1979), by applying a voltage between the aluminum-based member immersed in the treatment liquid and the counter electrode, the fine pores are The operation of forming an anodized film having on the surface of the aluminum-based member, and immersing the aluminum-based member having fine pores in an aqueous solution of ammonium thiomolybdate to form a direct current between the aluminum-based member (anode) and the counter electrode (cathode). There is known a technique of applying a voltage to deposit a molybdenum compound in the fine pores of the anodized film. According to this technique, when depositing the molybdenum compound, the density of the current supplied between the aluminum-based member (anode) and the counter electrode (cathode) is adjusted, so that the color tone of the anodic oxide film can be adjusted. However, the color tone formed on the aluminum-based member is a single color, and a gradation color tone in which the color gradually changes depending on the part of the aluminum-based member cannot be obtained.

【0005】更に、特開昭59−100288号公報
(公開1984年)に開示されているように、処理液に
浸漬させたアルミニウム系部材と対極との間に電圧を印
加することにより、微細ポアを有する陽極酸化皮膜をア
ルミニウム系部材の表面に形成する操作と、陽極酸化皮
膜を着色する操作とを実施する技術が開示されている。
この技術によれば、着色の際に、電気的絶縁材料で形成
された複数の部屋を有する枠体を用い、微細ポアを有す
るアルミニウム系部材を枠体と共に金属塩水溶液に浸漬
すると共に、枠体のうち所定の部屋に対極を配置した状
態で、対極が配置されている部屋のみにおいて、アルミ
ニウム系部材と対極との間に電圧を印加することによ
り、アルミニウム系部材のうち部屋内の部分を着色す
る。次に、対極を枠体の別の部屋に移動させ、同様に電
圧を印加し、アルミニウム系部材のうち部屋内の部分の
みを別の濃度となるように同一色を着色する。この技術
によれば、アルミニウム系部材のうち部屋で仕切られた
部分は同一の色濃度となるが、別の部屋で仕切られた部
分は他の色濃度とすることができる。この場合、部屋で
仕切られた部分には色調の境界線が明確に形成され、ア
ルミニウム系部材の部位に応じて色が次第に変化するグ
ラデーション色調が得られるものではない。
Further, as disclosed in Japanese Patent Application Laid-Open No. 59-100288 (published in 1984), a fine pore is formed by applying a voltage between an aluminum member immersed in a treatment liquid and a counter electrode. There is disclosed a technique of performing an operation of forming an anodized film having the above on the surface of an aluminum-based member and an operation of coloring the anodized film.
According to this technique, at the time of coloring, a frame body having a plurality of chambers formed of an electrically insulating material is used, and an aluminum-based member having fine pores is immersed in a metal salt aqueous solution together with the frame body, and at the same time, In a state in which the counter electrode is arranged in a predetermined room among them, by applying a voltage between the aluminum-based member and the counter electrode only in the room where the counter electrode is arranged, the portion of the aluminum-based member in the room is colored. To do. Next, the counter electrode is moved to another room of the frame body, a voltage is applied in the same manner, and only the portion of the aluminum-based member in the room is colored with the same color so as to have a different density. According to this technique, a part of the aluminum-based member partitioned by the room has the same color density, but a part of the aluminum-based member partitioned by another room can have another color density. In this case, the boundary line of the color tone is clearly formed in the part partitioned by the room, and the gradation tone in which the color gradually changes depending on the part of the aluminum-based member cannot be obtained.

【0006】更にまた特開平8ー269788号公報に
は、1回目の陽極酸化処理を行ったアルミニウム系部材
に部分的にマスキングを施し、マスキング部以外の陽極
酸化皮膜を脱膜した後、2回目の陽極酸化処理及び電解
着色を行う方法が開示されている。この技術によれば、
1回目と2回目の陽極酸化処理の2色がマスキングを施
した部分を境界線として明確に存在する。更にこの方法
では陽極酸化処理を2回行う必要があるため、コスト高
である。
Further, in Japanese Patent Laid-Open No. 8-269788, the aluminum-based member which has been subjected to the first anodic oxidation treatment is partially masked, and the anodic oxide film other than the masking portion is removed, and then the second time. A method of performing anodizing treatment and electrolytic coloring of the above is disclosed. According to this technology,
The two colors of the first and second anodizing treatments are clearly present with the masked portion as the boundary line. Further, in this method, the anodic oxidation treatment needs to be performed twice, so that the cost is high.

【0007】[0007]

【発明が解決しようとする課題】上記したように上記技
術によれば、アルミニウム系部材の部位に応じて色が次
第に変化するグラデーション色調が得られるものではな
い。
As described above, according to the above technique, it is not possible to obtain a gradation color tone in which the color gradually changes depending on the part of the aluminum-based member.

【0008】本発明は上記した実情に鑑みてなされたも
のであり、同一アルミニウム系部材内において部分的に
異なる色調をグラデーション的に変化させることができ
るアルミニウム系部材の電解着色方法を提供することを
課題とするにある。
The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a method for electrolytically coloring an aluminum-based member capable of gradationally changing partially different color tones in the same aluminum-based member. There is an issue.

【0009】[0009]

【課題を解決するための手段】本発明に係るアルミニウ
ム系部材の電解着色方法は、処理液に浸漬させたアルミ
ニウム系部材と対極との間に電圧を印加することによ
り、微細ポアを有する陽極酸化皮膜をアルミニウム系部
材の表面に形成する第1操作と、微細ポアを有するアル
ミニウム系部材を第1操作での処理液と同じまたは別の
処理液に浸漬し、陽極酸化皮膜の微細ポアを改質する第
2操作と、第2操作後のアルミニウム系部材の陽極酸化
皮膜の微細ポアに色形成物質を保持させ、アルミニウム
系部材を着色する第3操作とを実施するアルミニウム系
部材の電解着色方法において、第2操作において、処理
液とアルミニウム系部材との接触時間をアルミニウム系
部材の部位の位置に応じて変化させ、陽極酸化皮膜の微
細ポアの改質度をアルミニウム系部材の部位の位置に応
じて変化させることを特徴とするものである。
The method for electrolytically coloring an aluminum-based member according to the present invention is anodization having fine pores by applying a voltage between the aluminum-based member immersed in a treatment liquid and a counter electrode. First operation of forming a film on the surface of an aluminum-based member, and immersing an aluminum-based member having fine pores in the same or different treatment liquid as the treatment liquid in the first operation to modify the fine pores of the anodized film. In the electrolytic coloring method for an aluminum-based member, the second operation for performing the second operation and the third operation for coloring the aluminum-based member by causing the fine pores of the anodic oxide film of the aluminum-based member to hold the color forming substance are performed. In the second operation, the contact time between the treatment liquid and the aluminum-based member is changed according to the position of the site of the aluminum-based member to improve the degree of modification of the fine pores of the anodized film. It is characterized in that to vary according to the position of the site of Miniumu system members.

【0010】本発明方法によれば、第2操作において処
理液とアルミニウム系部材との接触時間をアルミニウム
系部材の部位の位置に応じて変化させる。これにより陽
極酸化皮膜の微細ポアの改質度をアルミニウム系部材の
部位の位置に応じて変化させる。このため、同一のアル
ミニウム系部材において陽極酸化皮膜の微細ポアの改質
度をアルミニウム系部材の部位の位置に応じて徐々に異
ならせることができる。
According to the method of the present invention, in the second operation, the contact time between the treatment liquid and the aluminum-based member is changed according to the position of the site of the aluminum-based member. As a result, the degree of modification of the fine pores of the anodic oxide film is changed according to the position of the aluminum member. Therefore, it is possible to gradually change the degree of modification of the fine pores of the anodic oxide film in the same aluminum-based member depending on the position of the site of the aluminum-based member.

【0011】[0011]

【発明の実施の形態】本発明方法で用いるアルミニウム
系部材としては車両部品、建築部品、意匠部品とするこ
とができるが、これらに限定されるものではない。車両
部品としては外装品、内装品でも良く、ドアフレーム、
ボディ、インパネリンフォース、ドア内板、スカッフプ
レート、モール等を例示できる。建築部品としては外装
品、内装品でも良く、フェンス、支柱、パネル、屋根、
ベランダ、バルコニー、手摺り、玄関ドア、窓枠等を例
示できる。本発明方法で用いるアルミニウム系部材とし
ては、アルミニウムまたはアルミニウム合金で形成され
た部材を採用できる。アルミニウム合金としてはAl−
Si系、Al−Mg系、Al−Cu系、Al−Zn系等
を例示できるが、これらに限定されるものではない。
BEST MODE FOR CARRYING OUT THE INVENTION The aluminum-based member used in the method of the present invention can be, but is not limited to, a vehicle part, a building part and a design part. Exterior parts and interior parts may be used as vehicle parts, door frames,
The body, instrument panel force, door inner plate, scuff plate, molding, etc. can be exemplified. Exterior parts and interior parts may be used as building parts, including fences, columns, panels, roofs,
A veranda, a balcony, a handrail, an entrance door, a window frame, etc. can be illustrated. As the aluminum-based member used in the method of the present invention, a member formed of aluminum or an aluminum alloy can be used. Al- as an aluminum alloy
Examples include Si-based, Al-Mg-based, Al-Cu-based, and Al-Zn-based, but are not limited to these.

【0012】本発明方法によれば、第1操作では、処理
液に浸漬させたアルミニウム系部材と対極との間に電圧
を印加することにより、図1(A)に示すように、微細
ポア2を有する陽極酸化皮膜3をアルミニウム系部材1
の表面に形成する。陽極酸化皮膜3は、先端で開口する
多数の微細ポア2を有するポア層3pと、微細ポア2を
有せず且つアルミニウム系部材1の表面側のバリヤ層3
bとを有する。第1操作に先立ち、バフ研磨、脱脂洗
浄、アルカリエッチング又は化学研磨、酸洗処理の少な
くとも一つを必要に応じて施すことができる。第1操作
では、対極(例えば鉛板、グラファイト等)を陰極と
し、アルミニウム系部材1を陽極とし、アルミニウム系
部材1と対極との間に直流電圧又は直流パルス波形電圧
を印加して行うことができる。処理液としては、りん酸
系、硫酸系、しゅう酸系、クロム酸系、りん酸・芳香族
スルホン酸系を例示できる。
According to the method of the present invention, in the first operation, by applying a voltage between the aluminum-based member immersed in the treatment liquid and the counter electrode, as shown in FIG. The anodized film 3 having
Formed on the surface of. The anodic oxide film 3 has a pore layer 3p having a large number of fine pores 2 opened at the tip, and a barrier layer 3 having no fine pores 2 and on the surface side of the aluminum-based member 1.
b and. Prior to the first operation, at least one of buff polishing, degreasing cleaning, alkali etching or chemical polishing, and pickling treatment can be performed if necessary. In the first operation, the counter electrode (for example, a lead plate, graphite, etc.) is used as a cathode, the aluminum-based member 1 is used as an anode, and a DC voltage or a DC pulse waveform voltage is applied between the aluminum-based member 1 and the counter electrode. it can. Examples of the treatment liquid include phosphoric acid type, sulfuric acid type, oxalic acid type, chromic acid type and phosphoric acid / aromatic sulfonic acid type.

【0013】第2操作では、微細ポア2を有するアルミ
ニウム系部材1を第1操作での処理液と同じまたは別の
処理液に浸漬し、処理液に浸漬されている陽極酸化皮膜
3の微細ポア2を改質する。第2操作において改質と
は、第1操作で形成された微細ポア2を変化させること
をいう。第2操作では、微細ポア2の改質を促進すべ
く、アルミニウム系部材1と対極との間に電圧(直流電
圧または交流電圧)を印加することが好ましい。
In the second operation, the aluminum-based member 1 having the fine pores 2 is dipped in a treatment solution which is the same as or different from the treatment solution in the first operation, and the fine pores of the anodic oxide film 3 which are dipped in the treatment solution. Modify 2. The reforming in the second operation means changing the fine pores 2 formed in the first operation. In the second operation, it is preferable to apply a voltage (DC voltage or AC voltage) between the aluminum-based member 1 and the counter electrode in order to promote the reforming of the fine pores 2.

【0014】改質としては、図1(B)(C)に示すよ
うに、微細ポア2の底部に枝別れ状の改質部4を形成す
る形態を採用することができる。場合によっては、微細
ポア2の底部のポア径を他のポア径よりも部分的に増加
させる形態があげられる。第2操作において処理液に浸
漬しているアルミニウム系部材1と対極との間に交流電
圧を印加する場合には、陽極酸化皮膜3の微細ポア2の
底部に枝別れ状の改質部4を形成することができる。ま
た第1操作の処理液として硫酸系を用い、第2操作の処
理液としてしゅう酸系を用いる場合には、微細ポア2の
底部のポア径を、底部よりも上方のポア径よりも部分的
に増加させることができる。
As the reforming, as shown in FIGS. 1B and 1C, it is possible to adopt a mode in which a branched reforming portion 4 is formed at the bottom of the fine pores 2. In some cases, the diameter of the pores at the bottom of the fine pores 2 may be partially increased over the diameters of other pores. When an AC voltage is applied between the aluminum-based member 1 immersed in the treatment liquid and the counter electrode in the second operation, the branched reforming section 4 is provided at the bottom of the fine pores 2 of the anodized film 3. Can be formed. When a sulfuric acid system is used as the treatment liquid for the first operation and an oxalic acid system is used as the treatment liquid for the second operation, the pore diameter at the bottom of the fine pores 2 is partially larger than the pore diameter above the bottom portion. Can be increased to

【0015】第2操作での処理液とアルミニウム系部材
1との接触時間(改質時間)がアルミニウム系部材1の
全部にわたり同一であれば、図1(B)に示すように、
微細ポア2の改質部4の改質度は、アルミニウム系部材
1の全体にわたり一様となる。これに対して本発明方法
によれば前述したように、第2操作での処理液とアルミ
ニウム系部材1との接触時間(改質時間)をアルミニウ
ム系部材1の部位の位置に応じて変化させるため、微細
ポア2の改質部4の改質度はアルミニウム系部材1の全
体にわたり一様ではなく、微細ポア2の改質部4の改質
度をアルミニウム系部材1の部位の位置に応じて変化さ
せることができる。
If the contact time (reforming time) between the treatment liquid and the aluminum-based member 1 in the second operation is the same over the entire aluminum-based member 1, as shown in FIG. 1 (B),
The modification degree of the modification part 4 of the fine pores 2 is uniform over the entire aluminum-based member 1. On the other hand, according to the method of the present invention, as described above, the contact time (reforming time) between the treatment liquid and the aluminum-based member 1 in the second operation is changed according to the position of the site of the aluminum-based member 1. Therefore, the modification degree of the modified portion 4 of the fine pores 2 is not uniform over the entire aluminum-based member 1, and the modification degree of the modified portion 4 of the fine pores 2 depends on the position of the site of the aluminum-based member 1. Can be changed.

【0016】微細ポア2の底部に枝別れ状の改質部4が
形成される場合には、図1(C)に示すように、第2操
作での処理液とアルミニウム系部材1との接触時間(改
質時間)が長くなれば、枝別れの度合いが大きい改質部
4(4A)が得られる。また処理液とアルミニウム系部
材1との接触時間(改質時間)が短くなれば、枝別れの
度合いが小さい改質部4(4B)が得られる。また処理
液とアルミニウム系部材1との接触時間(改質時間)が
中間であれば、枝別れの度合いが中間の改質部4(4
C)が得られる。
When the branched modified portion 4 is formed at the bottom of the fine pores 2, as shown in FIG. 1C, the treatment liquid in the second operation is brought into contact with the aluminum-based member 1. If the time (reforming time) is long, the reforming unit 4 (4A) having a large degree of branching can be obtained. Further, if the contact time (reforming time) between the treatment liquid and the aluminum-based member 1 becomes short, the reforming section 4 (4B) with a small degree of branching can be obtained. Further, if the contact time (reforming time) between the treatment liquid and the aluminum-based member 1 is intermediate, the reforming section 4 (4) having an intermediate degree of branching.
C) is obtained.

【0017】換言すれば、第2操作での処理液とアルミ
ニウム系部材1との接触時間(改質時間)を、アルミニ
ウム系部材1の長さ方向に沿って変化させることができ
る。この結果、微細ポア2の改質部4の改質度はアルミ
ニウム系部材1の全体にわたり一様ではなく、微細ポア
2の改質部4の改質度を、アルミニウム系部材1の長さ
方向に沿って変化させることができる。
In other words, the contact time (reforming time) between the treatment liquid and the aluminum-based member 1 in the second operation can be changed along the length direction of the aluminum-based member 1. As a result, the reforming degree of the reforming portion 4 of the fine pores 2 is not uniform over the entire aluminum-based member 1, and the reforming degree of the reforming portion 4 of the fine pores 2 is set in the longitudinal direction of the aluminum-based member 1. Can be changed along with.

【0018】第2操作では、処理液とアルミニウム系部
材1との接触時間(改質時間)をアルミニウム系部材1
の位置に応じて変化させるべく、処理液に浸漬されてい
るアルミニウム系部材1を処理液から徐々にゆっくりと
引き上げることが好ましい。引き上げ速度としては、ア
ルミニウム系部材1のサイズによっても相違するもの
の、毎秒0.1〜100mm、毎秒0.5〜80mm、
毎秒1〜50mm、毎秒1〜20mm、毎秒1〜10m
mを例示することができる。
In the second operation, the contact time (reforming time) between the treatment liquid and the aluminum-based member 1 is changed.
It is preferable to gradually and slowly pull up the aluminum-based member 1 immersed in the treatment liquid from the treatment liquid so that the aluminum-based member 1 is changed depending on the position. The pulling rate varies depending on the size of the aluminum-based member 1, but is 0.1 to 100 mm / sec, 0.5 to 80 mm / sec,
1 to 50 mm / s, 1 to 20 mm / s, 1 to 10 m / s
m can be illustrated.

【0019】第2操作においてアルミニウム系部材1と
対極との間に交流電圧を印加する場合には、第1操作で
印加された直流電圧よりも低い電圧で所定時間(例えば
1〜10分)交流電圧を印加する形態を採用することが
できる。この場合、通電を切らずに、アルミニウム系部
材1を処理液から所定の引き上げ速度(毎秒2〜10m
m)で引き上げる形態を採用することができる。これに
より第2操作においてアルミニウム系部材1が処理液中
に浸漬されている部分にのみ、陽極酸化皮膜3の微細ポ
ア2の改質を行うことができる。このため、同一のアル
ミニウム系部材1において陽極酸化皮膜3の微細ポア2
の構造を徐々に異ならせることができる。
When an AC voltage is applied between the aluminum-based member 1 and the counter electrode in the second operation, the AC voltage is lower than the DC voltage applied in the first operation for a predetermined time (for example, 1 to 10 minutes). A mode in which a voltage is applied can be adopted. In this case, the aluminum-based member 1 is pulled up from the processing liquid at a predetermined pulling speed (2 to 10 m / sec) without turning off the power.
It is possible to adopt a mode of pulling up in m). As a result, the fine pores 2 of the anodized film 3 can be modified only in the portion where the aluminum-based member 1 is immersed in the treatment liquid in the second operation. Therefore, in the same aluminum-based member 1, the fine pores 2 of the anodized film 3 are formed.
The structure of can be gradually different.

【0020】本発明方法によれば、第2操作において、
処理液に浸漬されているアルミニウム系部材1を処理液
から引き上げる引き上げ速度Vは、引き上げ中において
一定である形態を採用することができる。この場合、ア
ルミニウム系部材1を処理液から引き上げる駆動源の駆
動速度を一定とすることができる。
According to the method of the present invention, in the second operation,
The pulling rate V for pulling up the aluminum-based member 1 immersed in the treatment liquid from the treatment liquid may be constant during the pulling up. In this case, the drive speed of the drive source that pulls up the aluminum-based member 1 from the processing liquid can be constant.

【0021】また本発明方法によれば、第2操作におい
て、処理液に浸漬されているアルミニウム系部材1を処
理液から引き上げる引き上げ速度Vを引き上げ中におい
て変化させる引き上げ速度可変手段が設けられている形
態を採用することができる。この場合、アルミニウム系
部材1を処理液から引き上げる駆動源の駆動速度を引き
上げ中において可変とすることができる。駆動源として
は駆動モータ装置、流体圧シリンダ装置を例示できる。
なお、第2操作で用いる対極としては、第1操作で用い
る対極と同一または別のものとすることができる。
Further, according to the method of the present invention, in the second operation, the pulling speed varying means for changing the pulling speed V for pulling up the aluminum-based member 1 immersed in the treatment liquid from the treatment liquid during the raising is provided. A form can be adopted. In this case, the drive speed of the drive source that pulls up the aluminum-based member 1 from the processing liquid can be made variable during pulling up. Examples of the drive source include a drive motor device and a fluid pressure cylinder device.
The counter electrode used in the second operation may be the same as or different from the counter electrode used in the first operation.

【0022】第3操作では、図1(D)に示すように、
第2操作後のアルミニウム系部材1の陽極酸化皮膜3の
改質後の微細ポア2に色形成物質5を保持させ、アルミ
ニウム系部材1を着色する。この場合、一般的には、陽
極酸化皮膜3の微細ポア2の底部に金属塩を析出させ、
干渉色を得ることができる。色形成物質としては、S
n、Cu、Ni、Co、Fe等の少なくとも1種を例示
することができる。第3操作では、Sn、Cu、Ni、
Co、Fe等の少なくとも1種を有する金属塩を含む溶
液中において、対極(例えばグラファイト電極)を使用
して、アルミニウム系部材1と対極との間に交流電圧ま
たは直流電圧を印加する形態を採用することができる。
この場合、電圧値は2〜50V、殊に8〜20V、時間
は30秒から20min、殊に1〜5minを例示する
ことができる。電圧値は第1操作での電圧値よりも小さ
くすることができるが、これに限定されるものではな
い。なお、上記した電圧が交流電圧である場合には、電
圧値は実効値とする。
In the third operation, as shown in FIG.
The color forming substance 5 is held in the fine pores 2 after the modification of the anodic oxide film 3 of the aluminum-based member 1 after the second operation, and the aluminum-based member 1 is colored. In this case, generally, a metal salt is deposited on the bottom of the fine pores 2 of the anodized film 3,
Interference colors can be obtained. As a color forming substance, S
At least one kind of n, Cu, Ni, Co, Fe and the like can be exemplified. In the third operation, Sn, Cu, Ni,
In a solution containing a metal salt having at least one kind of Co, Fe, etc., a counter electrode (for example, a graphite electrode) is used to apply an AC voltage or a DC voltage between the aluminum-based member 1 and the counter electrode. can do.
In this case, the voltage value may be 2 to 50 V, particularly 8 to 20 V, and the time may be 30 seconds to 20 min, especially 1 to 5 min. The voltage value can be smaller than the voltage value in the first operation, but is not limited to this. When the above voltage is an AC voltage, the voltage value is an effective value.

【0023】前述したように本発明方法によれば、第2
操作において処理液とアルミニウム系部材1との接触時
間(改質時間,電解時間)をアルミニウム系部材1の部
位の位置に応じて変化させることにより、陽極酸化皮膜
3の微細ポア2の改質部4の改質度をアルミニウム系部
材1の部位の位置に応じて変化させている。このため第
3操作において、グラデーション色調をアルミニウム系
部材1に形成することができる。グラデーション色調が
得られる理由としては、陽極酸化皮膜3自体は透明であ
るものの、図1(C)(D)に示すように、アルミニウ
ム系部材1の改質部4の改質度を変化させ、陽極酸化皮
膜3の微細ポア2の改質部4の深さまたは構造がアルミ
ニウム系部材1の部位によって連続的に異なるため、陽
極酸化皮膜3の底面3xで反射する光と、陽極酸化皮膜
3の微細ポア2の改質部4に保持されている色形成物質
5で反射される光との干渉作用に基づくものと推察され
る。なお本発明方法によれば、第3操作を終えた後に、
アルミニウム系部材1に対して封孔処理を必要に応じて
行うことができる。封孔処理としては、一般的には、沸
騰水、酢酸ニッケル水溶液、クロム酸水溶液、有機高分
子溶液(アニオン塗料、エタノールアミン等)を接触さ
せることにより行うことができる。
As described above, according to the method of the present invention, the second
In the operation, by changing the contact time (reforming time, electrolysis time) between the treatment liquid and the aluminum-based member 1 according to the position of the site of the aluminum-based member 1, the modified portion of the fine pores 2 of the anodized film 3 is formed. The modification degree of No. 4 is changed according to the position of the site of the aluminum-based member 1. Therefore, the gradation color tone can be formed on the aluminum-based member 1 in the third operation. The reason why the gradation color tone is obtained is that although the anodized film 3 itself is transparent, as shown in FIGS. 1 (C) and 1 (D), the modification degree of the modified portion 4 of the aluminum-based member 1 is changed, Since the depth or structure of the modified portion 4 of the fine pores 2 of the anodic oxide coating 3 is continuously different depending on the site of the aluminum-based member 1, the light reflected by the bottom surface 3x of the anodic oxide coating 3 and the anodic oxide coating 3 can be changed. It is presumed that it is based on the interference effect with the light reflected by the color forming substance 5 held in the modified portion 4 of the fine pores 2. According to the method of the present invention, after finishing the third operation,
The sealing treatment can be performed on the aluminum-based member 1 as necessary. The sealing treatment can be generally performed by bringing boiling water, an aqueous solution of nickel acetate, an aqueous solution of chromic acid, and an organic polymer solution (anionic paint, ethanolamine, etc.) into contact with each other.

【0024】[0024]

【実施例】(実施例1)以下、本発明の実施例1を具体
的に説明する。第1操作では、JIS−A6063系の
アルミニウム系合金(Al−Mg−Si系)で形成され
たアルミニウム系部材1を用いた。図2に示すように、
このアルミニウム系部材1は、長さ500mmの長い平
板状をなす。そしてアルミニウム系部材1の表面をバフ
研磨し、工業用弱アルカリ洗剤で50℃×5分間洗浄
し、その後、水酸化ナトリウム100g/L、50℃中
で3分間、そのアルミニウム系部材1をエッチング処理
した。更に水洗した後に、硝酸150g/L、20℃×
1分間の条件でアルミニウム系部材1をデスマット処理
した。更に水洗した後に、硫酸200g/Lの処理液を
有する電解槽内にアルミニウム系部材1を浸漬させた状
態で、対極に鉛極板を使用し、アルミニウム系部材1と
対極との間に直流電圧(13V×35分間の条件)を印
加することにより、アルミニウム系部材1の表面に陽極
酸化処理を行い、厚み10μmの陽極酸化皮膜を形成し
た。
EXAMPLE 1 Example 1 of the present invention will be specifically described below. In the first operation, the aluminum-based member 1 formed of a JIS-A6063 based aluminum-based alloy (Al-Mg-Si based) was used. As shown in FIG.
The aluminum-based member 1 has a long flat plate shape with a length of 500 mm. Then, the surface of the aluminum-based member 1 is buffed, washed with an industrial weak alkaline detergent at 50 ° C. for 5 minutes, and then the aluminum-based member 1 is etched at 100 g / L of sodium hydroxide at 50 ° C. for 3 minutes. did. After further washing with water, nitric acid 150 g / L, 20 ° C x
The aluminum-based member 1 was desmutted under the condition of 1 minute. After further washing with water, a lead electrode plate is used for the counter electrode while the aluminum-based member 1 is immersed in an electrolytic bath having a treatment solution of 200 g / L of sulfuric acid, and a DC voltage is applied between the aluminum-based member 1 and the counter electrode. By applying (13 V × 35 minutes condition), the surface of the aluminum-based member 1 was anodized to form an anodized film having a thickness of 10 μm.

【0025】次に第2操作を行った。第2操作では同じ
電解槽及び対極を用い、アルミニウム系部材1と対極と
の間に、膜質の改質電圧として交流電圧3.7V(実効
値)を印加した。そして通電開始時刻から150秒後に
アルミニウム系部材1をこれの上端域1u(一端域)か
ら徐々に電解槽の処理液から引き上げる引き上げ操作を
開始した。通電開始時刻から300秒後には、アルミニ
ウム系部材1の全部を電解槽の処理液から引き上げた。
従って第2操作においてアルミニウム系部材1の上端域
1uは、最も短い時間、電解槽の処理液に浸漬されてい
ることになる。また、第2操作においてアルミニウム系
部材1の下端域1d(他端域)は、最も長い時間、電解
槽の処理液に浸漬されていることになる。
Next, the second operation was performed. In the second operation, the same electrolytic cell and counter electrode were used, and an AC voltage of 3.7 V (effective value) was applied between the aluminum-based member 1 and the counter electrode as a film quality reforming voltage. Then, 150 seconds after the start of energization, a pulling operation of gradually pulling up the aluminum-based member 1 from the upper end region 1u (one end region) of the treatment liquid in the electrolytic cell was started. After 300 seconds from the time when the energization was started, the entire aluminum-based member 1 was pulled up from the treatment liquid in the electrolytic cell.
Therefore, in the second operation, the upper end area 1u of the aluminum-based member 1 is immersed in the treatment liquid in the electrolytic bath for the shortest time. In addition, in the second operation, the lower end region 1d (the other end region) of the aluminum-based member 1 is immersed in the treatment liquid in the electrolytic cell for the longest time.

【0026】即ち、第2操作での処理液とアルミニウム
系部材1の接触時間(改質時間,電解時間)としては、
上端域1uが最も短く、下端域1dが最も長いことにな
る。その後、アルミニウム系部材1と対極との間におけ
る通電を切断した。
That is, as the contact time (reforming time, electrolysis time) between the treatment liquid and the aluminum-based member 1 in the second operation,
The upper end area 1u is the shortest and the lower end area 1d is the longest. After that, the energization between the aluminum-based member 1 and the counter electrode was cut off.

【0027】図3は第2操作における通電時間と電流値
との関係を模式的に示す。図3の横軸は通電開始時刻か
らの通電時間を示し、図3の縦軸はアルミニウム系部材
1と対極との間に設けられている電流計の電流測定値を
示す。図3に示すように通電開始直後では電流はあまり
流れなかった。通電開始からある時間経過したとき、電
流のピークが現れる。電流のピークを越えてから、アル
ミニウム系部材1の引き上げ開始を行い、アルミニウム
系部材1を処理液から徐々に引き上げ始める。
FIG. 3 schematically shows the relationship between the energization time and the current value in the second operation. The abscissa of FIG. 3 represents the energization time from the energization start time, and the ordinate of FIG. 3 represents the current measurement value of the ammeter provided between the aluminum-based member 1 and the counter electrode. As shown in FIG. 3, the current did not flow much immediately after the start of energization. When a certain time has passed from the start of energization, a peak of current appears. After the current peak is exceeded, the aluminum-based member 1 is started to be pulled, and the aluminum-based member 1 is gradually pulled from the processing liquid.

【0028】第2操作が終了した後に、硫酸第1スズ1
0g/L、酒石酸20g/L、硫酸15g/Lをそれぞ
れ含む水溶液を用い、この水溶液にアルミニウム系部材
1の全部を浸漬させた。そして、交流電圧(実効値)を
10Vとし、120秒間浴温25℃中で電解着色し、第
3操作を行った。なお表1は第2操作での電圧(改質電
圧)、引き上げ開始時間、通電終了時間、アルミニウム
系部材1における色調を示す。
After the completion of the second operation, stannous sulfate 1
An aqueous solution containing 0 g / L, 20 g / L of tartaric acid, and 15 g / L of sulfuric acid was used, and the entire aluminum-based member 1 was immersed in this aqueous solution. Then, the alternating voltage (effective value) was set to 10 V, electrolytic coloring was performed in a bath temperature of 25 ° C. for 120 seconds, and the third operation was performed. Table 1 shows the voltage (reforming voltage) in the second operation, pull-up start time, energization end time, and color tone of the aluminum-based member 1.

【0029】[0029]

【表1】 [Table 1]

【0030】実施例1によれば、アルミニウム系部材1
の上端域1u(一端域)が淡いブルーとなり、アルミニ
ウム系部材1の中央域1mが淡いグリーンとなり、アル
ミニウム系部材1の下端域1d(他端域)が淡いイエロ
ーとなるように、1個のアルミニウム系部材1において
上端域1u(一端域)から下端域1d(他端域)にかけ
て、色彩が次第に変化するグラデーション的な色調が得
られた。
According to the first embodiment, the aluminum-based member 1
The upper end area 1u (one end area) of the aluminum-based member 1 is pale blue, the central area 1m of the aluminum-based member 1 is pale green, and the lower end area 1d (the other end area) of the aluminum-based member 1 is pale yellow. In the aluminum-based member 1, a gradation-like color tone in which the color gradually changes from the upper end region 1u (one end region) to the lower end region 1d (other end region) was obtained.

【0031】この場合、アルミニウム系部材1の上端域
1u(一端域)は、第2操作において最も早期に引き上
げた部位であるため、第2操作の処理液と上端域1uと
の接触時間(改質時間,電解時間)は最も短い。またア
ルミニウム系部材1の下端域1d(他端域)は、第2操
作において最も遅く引き上げた部位であり、第2操作の
処理液と下端域1dとの接触時間(改質時間,電解時
間)は最も長い。またアルミニウム系部材1の中央域1
mは、第2操作において中間に引き上げた部位であり、
第2操作の処理液と中央域1mとの接触時間(改質時
間,電解時間)は、アルミニウム系部材1の下端域1d
と上端域1uとの中間である。なお第3操作を終えた後
に、封孔処理を必要に応じて行う。
In this case, since the upper end area 1u (one end area) of the aluminum-based member 1 is the portion that was pulled up earliest in the second operation, the contact time between the treatment liquid of the second operation and the upper end area 1u ( Quality time, electrolysis time) is the shortest. Further, the lower end region 1d (the other end region) of the aluminum-based member 1 is a portion that is pulled up latest in the second operation, and the contact time between the treatment liquid of the second operation and the lower end region 1d (reforming time, electrolysis time). Is the longest. Also, the central area 1 of the aluminum-based member 1
m is the part pulled up to the middle in the second operation,
The contact time (reforming time, electrolysis time) between the treatment liquid of the second operation and the central area 1 m is the lower end area 1 d of the aluminum-based member 1.
And the upper end area 1u. It should be noted that after the third operation is completed, a sealing process is performed as necessary.

【0032】(実施例2)実施例2は実施例1と基本的
には同様の条件で行った。即ち、実施例2では、実施例
1と同材質のアルミニウム系部材1を用い、第1操作を
実施例1と同一条件とした。そして第2操作において
は、通電開始から240秒後にアルミニウム系部材1を
これの上端域1uから徐々に電解槽の処理液から引き上
げ、400秒後にアルミニウム系部材1の全部を電解槽
の処理液から徐々に引き出した。
Example 2 Example 2 was carried out basically under the same conditions as Example 1. That is, in Example 2, the aluminum-based member 1 made of the same material as in Example 1 was used, and the first operation was performed under the same conditions as in Example 1. Then, in the second operation, after 240 seconds from the start of energization, the aluminum-based member 1 is gradually pulled up from the treatment liquid in the electrolytic cell from the upper end region 1u thereof, and after 400 seconds, the entire aluminum-based member 1 is removed from the treatment liquid in the electrolytic cell. Pulled out gradually.

【0033】従ってアルミニウム系部材1の上端域1u
は最も短い時間、電解槽の処理液に浸漬されていること
になる。アルミニウム系部材1の下端域1dは最も長い
時間、電解槽の処理液に浸漬されていることになる。そ
の後、通電を切断した。更に実施例1と同一の条件に
て、アルミニウム系部材1について第3操作の電解着色
を行った。この結果、アルミニウム系部材1の上端域1
uが淡いイエローとなり、アルミニウム系部材1の中央
域1mが濃いレッドとなり、アルミニウム系部材1の下
端域1dが濃いブルーとなるように、1個のアルミニウ
ム系部材1において上端域1u(一端域)から下端域1
d(他端域)にかけて、色彩がグラデーション的に変化
する色調が得られた。
Therefore, the upper end area 1u of the aluminum-based member 1
Will be immersed in the treatment liquid of the electrolytic cell for the shortest time. The lower end region 1d of the aluminum-based member 1 is immersed in the treatment liquid in the electrolytic cell for the longest time. After that, the power supply was cut off. Further, under the same conditions as in Example 1, the aluminum-based member 1 was electrolytically colored in the third operation. As a result, the upper end region 1 of the aluminum-based member 1
The upper end region 1u (one end region) of one aluminum-based member 1 such that u becomes light yellow, the central region 1m of the aluminum-based member 1 becomes dark red, and the lower end region 1d of the aluminum-based member 1 becomes dark blue. To bottom area 1
A color tone in which the color changed gradationally was obtained over d (the other end region).

【0034】(実施例3)実施例3は実施例1と基本的
には同様の条件で行った。即ち、実施例1と同材質のア
ルミニウム系部材1を用い、第1操作を実施例1と同一
条件で実施した。そして第2操作において通電開始から
300秒後にアルミニウム系部材1をこれの上端域1u
から徐々に電解槽の処理液から引き上げ、通電開始から
430秒後にアルミニウム系部材1の全体を電解槽の処
理液から引き上げた。従ってアルミニウム系部材1の上
端域1uは最も短い時間、電解槽の処理液に浸漬されて
いることになる。アルミニウム系部材1の下端域1dは
最も長い時間、電解槽の処理液に浸漬されていることに
なる。そしてアルミニウム系部材1と対極との間におけ
る通電を切断した後、実施例1と同一の条件にて第3操
作の電解着色を行った。その結果、アルミニウム系部材
1の上端域1uが淡いイエローとなり、アルミニウム系
部材1の中央域1mが濃いブルーとなり、アルミニウム
系部材1の下端域1dが濃いグリーンとなるように、1
個のアルミニウム系部材1において上端域1u(一端
域)から下端域1d(他端域)にかけて、色彩がグラデ
ーション的に変化する色調が得られた。
(Example 3) Example 3 was carried out under basically the same conditions as Example 1. That is, the first operation was performed under the same conditions as in Example 1, using the aluminum-based member 1 made of the same material as in Example 1. Then, in the second operation, 300 seconds after the start of energization, the aluminum-based member 1 is attached to the upper end region 1u thereof.
Then, the whole aluminum-based member 1 was pulled up from the treatment liquid in the electrolytic bath 430 seconds after the start of energization. Therefore, the upper end area 1u of the aluminum-based member 1 is immersed in the treatment liquid in the electrolytic bath for the shortest time. The lower end region 1d of the aluminum-based member 1 is immersed in the treatment liquid in the electrolytic cell for the longest time. Then, after the energization between the aluminum-based member 1 and the counter electrode was cut off, electrolytic coloring of the third operation was performed under the same conditions as in Example 1. As a result, the upper end area 1u of the aluminum-based member 1 becomes pale yellow, the central area 1m of the aluminum-based member 1 becomes dark blue, and the lower end area 1d of the aluminum-based member 1 becomes dark green.
In each of the aluminum-based members 1, a color tone in which the color changed gradationally was obtained from the upper end region 1u (one end region) to the lower end region 1d (other end region).

【0035】(適用例)図4は適用例を示す。この適用
例はアルミニウム系部材として車両のドアフレーム10
に適用したものである。適用例においては、ドアフレー
ム10は、導電性をもつホルダ11に着脱可能に保持さ
れている。ホルダ11は昇降装置12により昇降可能と
されている。昇降装置12は、案内プーリ13xを介し
てホルダ11を吊持するワイヤやロープなどの吊持部材
13と、吊持部材13を巻き付ける巻付プーリ14aを
モータ軸14cに装備したモータ装置14と、モータ装
置14の回転を制御する制御装置15とを有する。電解
槽20の処理液21には複数の対極23が浸漬されてい
る。なお対極23及びホルダ11は、電解用電源26に
給電線26a,26cを介して接続されている。
(Application Example) FIG. 4 shows an application example. In this application example, an aluminum-based member is used as a vehicle door frame 10.
It has been applied to. In the application example, the door frame 10 is detachably held by a holder 11 having conductivity. The holder 11 can be moved up and down by an elevating device 12. The lifting device 12 includes a suspension member 13 such as a wire or a rope that suspends the holder 11 via a guide pulley 13x, a motor device 14 in which a winding pulley 14a for winding the suspension member 13 is mounted on a motor shaft 14c, The controller 15 controls the rotation of the motor device 14. A plurality of counter electrodes 23 are immersed in the treatment liquid 21 of the electrolytic bath 20. The counter electrode 23 and the holder 11 are connected to the electrolysis power source 26 via feeder lines 26a and 26c.

【0036】第1操作では、ホルダ11にドアフレーム
10を保持した状態で、モータ装置14を回転駆動させ
ることによりホルダ11を下降させ、電解槽20の処理
液21にホルダ11と共にドアフレーム10の全体を浸
漬させる。そしてドアフレーム10を陽極、対極23を
陰極とした状態で、処理液21に浸漬させたドアフレー
ム10と対極23との間に直流電圧を所定時間印加す
る。これによりドアフレーム10に対して陽極酸化処理
を行い、微細ポアを有する陽極酸化皮膜をドアフレーム
10の表面に形成する。
In the first operation, while the door frame 10 is held by the holder 11, the motor 11 is rotationally driven to lower the holder 11, so that the treatment liquid 21 in the electrolytic bath 20 is moved to the holder 11 together with the door frame 10. Soak the whole. Then, with the door frame 10 as an anode and the counter electrode 23 as a cathode, a DC voltage is applied for a predetermined time between the door frame 10 immersed in the treatment liquid 21 and the counter electrode 23. Thus, the door frame 10 is anodized to form an anodized film having fine pores on the surface of the door frame 10.

【0037】第2操作では、微細ポアを有する陽極酸化
皮膜をもつドアフレーム10の全体を電解槽20の処理
液21に浸漬した状態で、ドアフレーム20と対極23
との間に交流電圧を印加することにより、ドアフレーム
20の表面に形成されている陽極酸化皮膜の微細ポアの
構造を改質する。第2操作では、交流電圧の印加開始時
刻から所定時間経過したら、制御装置15によりモータ
装置14を駆動させ、ホルダ11を処理液21から徐々
に引き上げる。これによりホルダ11に保持されている
ドアフレーム10を電解槽20の処理液21から所定の
引き上げ速度Vで徐々に引き上げる。
In the second operation, with the entire door frame 10 having the anodized film having fine pores immersed in the treatment liquid 21 in the electrolytic cell 20, the door frame 20 and the counter electrode 23 are treated.
By applying an AC voltage between the two, the structure of the fine pores of the anodized film formed on the surface of the door frame 20 is modified. In the second operation, after a lapse of a predetermined time from the application start time of the AC voltage, the controller 15 drives the motor device 14 to gradually pull up the holder 11 from the treatment liquid 21. Thereby, the door frame 10 held by the holder 11 is gradually pulled up from the treatment liquid 21 in the electrolytic bath 20 at a predetermined pulling rate V.

【0038】この結果、ドアフレーム10と処理液21
との接触時間(改質時間)をドアフレーム10の上端域
10uでは短くし、中間域10mでは中間とし、下端域
10dでは長くする。このようにドアフレーム10と処
理液21との接触時間(改質時間)をドアフレーム10
の部位の高さ位置に応じて変化させ、陽極酸化皮膜の微
細ポアの改質度をドアフレーム10の部位の高さ位置に
応じて変化させた。即ち、陽極酸化皮膜の微細ポアの改
質度をドアフレーム10の高さ位置に応じて変化させ
た。
As a result, the door frame 10 and the processing liquid 21
The contact time with (reforming time) is shortened in the upper end region 10u of the door frame 10, intermediate in the intermediate region 10m, and lengthened in the lower end region 10d. In this way, the contact time (reforming time) between the door frame 10 and the treatment liquid 21 is set to the door frame 10
The degree of modification of the fine pores of the anodized film was changed in accordance with the height position of the portion of the door frame 10 was changed. That is, the degree of modification of the fine pores of the anodized film was changed according to the height position of the door frame 10.

【0039】第3操作では、ドアフレーム10の微細ポ
アに色形成物質を保持させ、ドアフレーム10に着色し
た。これによりドアフレーム10の表面においてこれの
上端域10uから下端域10dにかけて色が次第に変化
するグラデーション色調を形成することができる。
In the third operation, the color forming substance was held in the fine pores of the door frame 10 to color the door frame 10. This makes it possible to form a gradation color tone on the surface of the door frame 10 in which the color gradually changes from the upper end region 10u to the lower end region 10d.

【0040】第2操作において処理液21に浸漬されて
いるドアフレーム10を処理液21から引き上げる引き
上げ速度Vは、一定でも良いし、可変でも良い。
In the second operation, the pulling speed V for pulling up the door frame 10 immersed in the treatment liquid 21 from the treatment liquid 21 may be constant or variable.

【0041】なお上記した図4に示す適用例によれば、
ドアフレーム10と処理液21との接触時間(改質時
間,電解時間)をドアフレーム10の部位の高さ位置に
応じて変化させ、陽極酸化皮膜の微細ポアの改質度をド
アフレーム10の部位の高さ位置に応じて変化させてい
るが、これに限らず、ホルダ11に保持されるドアフレ
ーム10の姿勢を変えることにより、ドアフレーム10
と処理液21との接触時間(改質時間,電解時間)をド
アフレーム10の部位の横方向位置に応じて変化させる
ことにし、陽極酸化皮膜の微細ポアの改質度をドアフレ
ーム10の部位の横方向位置に応じて変化させることに
しても良い。
According to the application example shown in FIG.
The contact time (reforming time, electrolysis time) between the door frame 10 and the treatment liquid 21 is changed according to the height position of the portion of the door frame 10, and the modification degree of the fine pores of the anodic oxide film of the door frame 10 is changed. Although it is changed according to the height position of the part, the present invention is not limited to this, and by changing the posture of the door frame 10 held by the holder 11, the door frame 10 can be changed.
The contact time (reforming time, electrolysis time) between the treatment liquid 21 and the treatment liquid 21 is changed according to the lateral position of the portion of the door frame 10, and the degree of reforming of the fine pores of the anodic oxide film is changed to the portion of the door frame 10. It may be changed according to the horizontal position of the.

【0042】図5はドアフレーム10の引き上げ速度V
を可変とした場合の例を示す。図5に示すように、第2
操作において電圧印加開始時刻から時間T1経過すると
(ステップS102)、モータ装置14を駆動させ、ホ
ルダ11と共にドアフレーム10を処理液21から引き
上げる操作を開始する(ステップS104)。初期の引
き上げ速度はVとする(ステップS104)。電圧印加
開始時刻から時間T2経過すると(ステップS10
6)、引き上げ速度をV2とする(ステップS10
8)。更に電圧印加開始時刻から時間T3経過すると
(ステップS110)、引き上げ速度をV3とする(ス
テップS112)。更に電圧印加開始時刻から時間T4
経過すると(ステップS114)、引き上げ速度をV4
とする(ステップS116)。なおステップS104,
108,112,116は、アルミニウム系部材として
のドアフレーム10を処理液21から引き上げる引き上
げ速度を、引き上げ中において変化させる引き上げ速度
可変手段として機能することができる。
FIG. 5 shows the lifting speed V of the door frame 10.
An example is shown in which is variable. As shown in FIG.
When the time T1 has elapsed from the voltage application start time in the operation (step S102), the motor device 14 is driven to start the operation of pulling up the door frame 10 together with the holder 11 from the processing liquid 21 (step S104). The initial pulling rate is V (step S104). When time T2 has elapsed from the voltage application start time (step S10
6), the pulling rate is set to V2 (step S10).
8). Further, when time T3 has elapsed from the voltage application start time (step S110), the pulling rate is set to V3 (step S112). Furthermore, time T4 from the voltage application start time
When the time has elapsed (step S114), the pulling speed is set to V4.
(Step S116). Note that step S104,
108, 112, and 116 can function as pulling-up speed varying means that changes the pulling-up speed for pulling up the door frame 10 as an aluminum-based member from the processing liquid 21 during pulling up.

【0043】図6(A)〜(D)は引き上げ速度の変遷
例を示す。図5(A)は第2操作における引き上げ速度
がV1と一定である形態を示す。図5(B)は第2操作
における引き上げ速度がV1→V2→V1と変化するよ
うに、途中で減速される形態を示す。図5(C)は第2
操作における引き上げ速度がV1→V3→V1と変化す
るように、途中で増速される形態を示す。図5(D)は
引き上げ速度がV1→V2→V1→V2と変化し、減速
及び増速が繰り返される形態を示す。
FIGS. 6A to 6D show examples of changes in the pulling rate. FIG. 5A shows a mode in which the pulling rate in the second operation is constant at V1. FIG. 5B shows a mode in which the pulling speed in the second operation is decelerated on the way so that the pulling speed changes from V1 → V2 → V1. FIG. 5C shows the second
The mode in which the speed is increased in the middle so that the pulling speed in the operation changes from V1 to V3 to V1 is shown. FIG. 5D shows a mode in which the pulling speed changes in the order of V1 → V2 → V1 → V2, and deceleration and acceleration are repeated.

【0044】上記したようにドアフレーム10と処理液
21との接触時間(改質時間)の長短、つまり第2操作
に係る処理液21におけるドアフレーム10への電圧印
加時間の長短は、ドアフレーム10に着色される色を変
化させ得る。このためドアフレーム10に着色される色
のうち所望の色を有する部位の幅寸法を大きくしたいと
きには、それに対応するドアフレーム10の部位の引き
上げ速度を低下させ、第2操作において当該部位が処理
液21に接触している接触時間(改質時間)を確保すれ
ば良い。あるいは、着色される色のうち所望の色を有す
る部位の幅寸法を小さくしたいときには、それに対応す
るドアフレーム10の部位の引き上げ速度を増加させ、
第2操作において当該部位が処理液21に接触している
接触時間(改質時間)を少なくすれば良い。
As described above, the length of the contact time (reforming time) between the door frame 10 and the processing liquid 21, that is, the length of the voltage application time to the door frame 10 in the processing liquid 21 related to the second operation depends on the door frame. The color tinted 10 can be varied. Therefore, when it is desired to increase the width dimension of a portion of the door frame 10 having a desired color among the colors to be colored, the pulling-up speed of the portion of the door frame 10 corresponding thereto is reduced, and the portion is treated liquid in the second operation. It suffices to secure the contact time (reforming time) of contacting with 21. Alternatively, when it is desired to reduce the width dimension of a portion having a desired color among the colors to be colored, the pulling speed of the portion of the door frame 10 corresponding thereto is increased,
In the second operation, the contact time (reforming time) in which the part is in contact with the treatment liquid 21 may be reduced.

【0045】(その他)上記した図5及び図6に示す形
態はあくまでも例示であり、これらの形態に限定される
ものではない。その他、本発明方法は上記した実施例の
みに限定されるものではなく、要旨を逸脱しない範囲内
で適宜変更して実施できるものである。上記した記載か
ら次の技術的思想も把握できる。 (付記項1)微細ポアを有する陽極酸化皮膜をもつアル
ミニウム系部材において、陽極酸化皮膜の微細ポアと、
微細ポアに保持された色形成物質とを有するアルミニウ
ム系部材において、陽極酸化皮膜の微細ポアの改質度は
アルミニウム系部材の部位の位置に応じて変化してお
り、グラデーション色調を有していることを特徴とする
アルミニウム系部材。 (付記項2)請求項1において、第2操作において、処
理液中におけるアルミニウム系部材の電圧印加時間を前
記アルミニウム系部材の部位の高さ位置に応じて変化さ
せ、陽極酸化皮膜の微細ポアの改質度をアルミニウム系
部材の部位の高さ位置に応じて変化させることを特徴と
するアルミニウム系部材の電解着色方法。 (付記項3)処理液に浸漬させたアルミニウム系部材と
対極との間に電圧を印加することにより、微細ポアを有
する陽極酸化皮膜をアルミニウム系部材の表面に形成す
る第1操作と、微細ポアを有するアルミニウム系部材を
第1操作での処理液と同じまたは別の処理液に浸漬し、
陽極酸化皮膜の微細ポアを改質する第2操作と、第2操
作後のアルミニウム系部材の陽極酸化皮膜の微細ポアに
色形成物質を保持させ、アルミニウム系部材を着色する
第3操作とを実施するアルミニウム系部材の電解着色方
法において、第2操作において、処理液中におけるアル
ミニウム系部材の電解時間をアルミニウム系部材の一端
域から他端域にかけて変化させ、陽極酸化皮膜の微細ポ
アの改質度をアルミニウム系部材の一端域から他端域に
かけて変化させることを特徴とするアルミニウム系部材
の電解着色方法。
(Others) The above-described forms shown in FIGS. 5 and 6 are merely examples, and the present invention is not limited to these forms. In addition, the method of the present invention is not limited to the above-described embodiments, but can be implemented with appropriate modifications without departing from the scope of the invention. The following technical idea can be understood from the above description. (Additional Item 1) In an aluminum-based member having an anodized film having fine pores, the fine pores of the anodized film,
In an aluminum-based member having a color-forming substance retained in the fine pores, the degree of modification of the fine pores in the anodized film changes depending on the position of the site of the aluminum-based member, and has a gradation color tone. An aluminum-based member characterized in that. (Additional Item 2) In the first operation according to claim 1, the voltage application time of the aluminum-based member in the treatment liquid is changed in accordance with the height position of the site of the aluminum-based member, and the fine pores of the anodic oxide film are formed. An electrolytic coloring method for an aluminum-based member, characterized in that the degree of modification is changed according to the height position of the site of the aluminum-based member. (Additional Item 3) A first operation of forming an anodized film having fine pores on the surface of an aluminum-based member by applying a voltage between the aluminum-based member immersed in a treatment liquid and a counter electrode, and the fine pores. The aluminum-based member having is immersed in the same or different treatment liquid as the treatment liquid in the first operation,
A second operation of modifying the fine pores of the anodic oxide film and a third operation of coloring the aluminum-based member by causing the fine pores of the anodic oxide film of the aluminum-based member after the second operation to hold a color forming substance In the second operation, in the second operation, the electrolysis time of the aluminum-based member in the treatment liquid is changed from one end region of the aluminum-based member to the other end region thereof, and the degree of modification of fine pores of the anodic oxide film is improved. Is changed from one end region to the other end region of the aluminum-based member.

【0046】[0046]

【発明の効果】以上説明したように本発明方法によれ
ば、第2操作においてアルミニウム系部材が処理液と接
触している部分に陽極酸化皮膜の微細ポアの改質が行な
われる。このような本発明方法によれば、処理液とアル
ミニウム系部材との接触時間をアルミニウム系部材の部
位の位置に応じて変化させ、陽極酸化皮膜の微細ポアの
改質度をアルミニウム系部材の部位の位置に応じて変化
させることができる。従ってアルミニウム系部材にグラ
デーション色調を形成することができる。
As described above, according to the method of the present invention, in the second operation, the fine pores of the anodic oxide film are modified in the portion where the aluminum-based member is in contact with the treatment liquid. According to such a method of the present invention, the contact time between the treatment liquid and the aluminum-based member is changed according to the position of the part of the aluminum-based member, and the degree of modification of the fine pores of the anodic oxide film is changed to the part of the aluminum-based member. Can be changed according to the position of. Therefore, a gradation color tone can be formed on the aluminum-based member.

【0047】殊に本発明方法によれば、第2操作におい
て処理液中のアルミニウム系部材と対極との間に電圧を
印加すれば、陽極酸化皮膜の微細ポアの改質度を効果的
に行うことができるため、アルミニウム系部材にグラデ
ーション色調を効果的に形成することができる。
In particular, according to the method of the present invention, if a voltage is applied between the aluminum-based member in the treatment liquid and the counter electrode in the second operation, the degree of modification of the fine pores of the anodic oxide film can be effectively performed. Therefore, it is possible to effectively form a gradation color tone on the aluminum-based member.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明方法における陽極酸化膜の改質過程を模
式的に示す断面図である。
FIG. 1 is a cross-sectional view schematically showing a process of modifying an anodic oxide film in the method of the present invention.

【図2】試験例で用いたアルミニウム系部材の側面図で
ある。
FIG. 2 is a side view of an aluminum-based member used in a test example.

【図3】第2操作における時間と電流値との関係を模式
的に示すグラフである。
FIG. 3 is a graph schematically showing the relationship between time and current value in the second operation.

【図4】適用例に係り、第2操作を実施している状態を
模式的に示す構成図である。
FIG. 4 is a configuration diagram schematically illustrating a state in which a second operation is performed according to the application example.

【図5】第2操作において制御装置が実行する制御側の
一例を示すフローチャートである。
FIG. 5 is a flowchart showing an example of a control side executed by a control device in a second operation.

【図6】第2操作においてアルミニウム系部材と対極と
の間に印加する印加電圧と時間との関係を模式的に例示
するグラフである。
FIG. 6 is a graph schematically illustrating the relationship between the applied voltage applied between the aluminum-based member and the counter electrode in the second operation and time.

【符号の説明】[Explanation of symbols]

図中、1はアルミニウム系部材、2は微細ポア、3は陽
極酸化皮膜、5は色形成物質,10はドアフレーム、1
2は昇降装置、14はモータ装置を示す。
In the figure, 1 is an aluminum-based member, 2 is a fine pore, 3 is an anodized film, 5 is a color forming substance, 10 is a door frame, 1
Reference numeral 2 is a lifting device, and 14 is a motor device.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 豊本 敏弘 富山県新湊市奈呉の江12番地の3 アイシ ン軽金属株式会社内 (72)発明者 新村 仁 富山県新湊市奈呉の江12番地の3 アイシ ン軽金属株式会社内 (72)発明者 村上 哲 富山県新湊市奈呉の江12番地の3 アイシ ン軽金属株式会社内   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Toshihiro Toyomoto             3 Aishi, 12 E, Nagure, Shinminato City, Toyama Prefecture             Light Metal Co., Ltd. (72) Inventor Hitoshi Niimura             3 Aishi, 12 E, Nagure, Shinminato City, Toyama Prefecture             Light Metal Co., Ltd. (72) Inventor Satoshi Murakami             3 Aishi, 12 E, Nagure, Shinminato City, Toyama Prefecture             Light Metal Co., Ltd.

Claims (5)

【特許請求の範囲】[Claims] 【請求項1】処理液に浸漬させたアルミニウム系部材と
対極との間に電圧を印加することにより、微細ポアを有
する陽極酸化皮膜をアルミニウム系部材の表面に形成す
る第1操作と、 微細ポアを有するアルミニウム系部材を第1操作での処
理液と同じまたは別の処理液に浸漬し、陽極酸化皮膜の
微細ポアを改質する第2操作と、 第2操作後のアルミニウム系部材の陽極酸化皮膜の微細
ポアに色形成物質を保持させ、アルミニウム系部材を着
色する第3操作とを実施するアルミニウム系部材の電解
着色方法において、 第2操作において、処理液とアルミニウム系部材との接
触時間をアルミニウム系部材の部位の位置に応じて変化
させ、陽極酸化皮膜の微細ポアの改質度をアルミニウム
系部材の部位の位置に応じて変化させることを特徴とす
るアルミニウム系部材の電解着色方法。
1. A first operation for forming an anodized film having fine pores on the surface of an aluminum-based member by applying a voltage between an aluminum-based member immersed in a treatment liquid and a counter electrode, and the fine pores. A second operation for modifying the fine pores of the anodized film by immersing the aluminum-based member having the same in the same or different processing liquid as the processing liquid in the first operation; and anodizing the aluminum-based member after the second operation. In the electrolytic coloring method for an aluminum-based member, the color-forming substance is held in the fine pores of the coating, and the third operation for coloring the aluminum-based member is performed. In the second operation, the contact time between the treatment liquid and the aluminum-based member is changed. It is characterized in that it is changed according to the position of the site of the aluminum-based member, and the degree of modification of the fine pores of the anodized film is changed according to the position of the site of the aluminum-based member. Electrolytic coloring process of aluminum-based member.
【請求項2】請求項1において、第2操作において、処
理液に浸漬されているアルミニウム系部材と対極との間
に電圧を印加することを特徴とするアルミニウム系部材
の電解着色方法。
2. The electrolytic coloring method for an aluminum-based member according to claim 1, wherein in the second operation, a voltage is applied between the aluminum-based member immersed in the treatment liquid and the counter electrode.
【請求項3】請求項1または請求項2において、第2操
作において、処理液に浸漬されているアルミニウム系部
材を処理液から徐々に引き上げることを特徴とするアル
ミニウム系部材の電解着色方法。
3. The electrolytic coloring method for an aluminum-based member according to claim 1 or 2, wherein in the second operation, the aluminum-based member immersed in the treatment liquid is gradually pulled up from the treatment liquid.
【請求項4】請求項1〜請求項3のいずれか一項におい
て、第2操作において、処理液に浸漬されているアルミ
ニウム系部材を処理液から引き上げる引き上げ速度V
は、引き上げ中において一定であることを特徴とするア
ルミニウム系部材の電解着色方法。
4. The pulling rate V for pulling up the aluminum-based member immersed in the treatment liquid from the treatment liquid in the second operation according to any one of claims 1 to 3.
Is an electrolytic coloring method for an aluminum-based member, which is constant during pulling.
【請求項5】請求項1〜請求項4のいずれか一項におい
て、第2操作において、処理液に浸漬されているアルミ
ニウム系部材を処理液から引き上げる引き上げ速度Vを
引き上げ中において変化させる引き上げ速度可変手段が
設けられていることを特徴とするアルミニウム系部材の
電解着色方法。
5. The pulling rate according to claim 1, wherein the pulling rate V for pulling up the aluminum-based member immersed in the treatment liquid from the treatment liquid in the second operation is changed during the pulling operation. A method for electrolytically coloring an aluminum-based member, characterized in that variable means is provided.
JP2002078340A 2002-03-20 2002-03-20 Electrolytic coloring method for aluminum member Pending JP2003277990A (en)

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Country Link
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WO2011043464A1 (en) * 2009-10-09 2011-04-14 シャープ株式会社 Mold and production method for same, and anti-reflection film
US20120015172A1 (en) * 2009-01-06 2012-01-19 Byd Company Limited Composite material and preparing method of the same
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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007039757A (en) * 2005-08-04 2007-02-15 Katsushika:Kk Method for decorating workpiece with anodic oxide coating
US20120015172A1 (en) * 2009-01-06 2012-01-19 Byd Company Limited Composite material and preparing method of the same
WO2011043464A1 (en) * 2009-10-09 2011-04-14 シャープ株式会社 Mold and production method for same, and anti-reflection film
JP4796217B2 (en) * 2009-10-09 2011-10-19 シャープ株式会社 Mold, mold manufacturing method and antireflection film
CN102575372A (en) * 2009-10-09 2012-07-11 夏普株式会社 Mold and production method for same, and anti-reflection film
CN102575372B (en) * 2009-10-09 2014-05-28 夏普株式会社 Mold and production method for same, and anti-reflection film
US9127371B2 (en) 2009-10-09 2015-09-08 Sharp Kabushiki Kaisha Mold and production method for same, and anti-reflection film
US20130224406A1 (en) * 2012-02-24 2013-08-29 Htc Corporation Casing of handheld electronic device and method of manufacturing the same
US11312107B2 (en) * 2018-09-27 2022-04-26 Apple Inc. Plugging anodic oxides for increased corrosion resistance
CN111501077A (en) * 2020-04-28 2020-08-07 海信视像科技股份有限公司 Anodic oxidation gradient color coloring method for metal workpiece

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