JP2534805B2 - Electrolytic coloring method of aluminum or aluminum alloy - Google Patents
Electrolytic coloring method of aluminum or aluminum alloyInfo
- Publication number
- JP2534805B2 JP2534805B2 JP3138857A JP13885791A JP2534805B2 JP 2534805 B2 JP2534805 B2 JP 2534805B2 JP 3138857 A JP3138857 A JP 3138857A JP 13885791 A JP13885791 A JP 13885791A JP 2534805 B2 JP2534805 B2 JP 2534805B2
- Authority
- JP
- Japan
- Prior art keywords
- aluminum
- electrolytic
- coloring
- treatment
- energization
- 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.)
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Description
【０００１】[0001]
【産業上の利用分野】本発明は、アルミニウムまたはア
ルミニウム合金（以下、単に「アルミニウム」とい
う。）の電解着色方法に関するものである。詳しくは、
陽極酸化処理を施したアルミニウムを電解着色処理する
に先立って、チタン等の不溶性金属を対極に用いて交流
電解処理を施すと共に、交流電解処理を施す際、特定の
パラメーターを選定し、該パラメーターを制御すること
を特徴とし、処理すべきアルミニウムの大きさや形状に
関係なく、アルミニウム表面に濃淡のない安定したしか
も均一かつ美麗な着色および色調の変化に富んだ着色を
施すことのできるアルミニウムの電解着色方法に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for electrolytically coloring aluminum or an aluminum alloy (hereinafter simply referred to as "aluminum"). For more information,
Prior to electrolytic coloring treatment of anodized aluminum, AC electrolytic treatment using an insoluble metal such as titanium as a counter electrode is performed, and when AC electrolytic treatment is performed, specific parameters are selected and Electrolytic coloring of aluminum, which is characterized by controlling, and which can provide stable, uniform and beautiful coloring on the surface of aluminum regardless of the size and shape of aluminum to be treated, and coloring rich in change in color tone. It is about the method.
【０００２】[0002]
【従来の技術】近時、表面が着色されたアルミニウム
は、建築ビルの壁装材、窓枠サッシ材料その他広く使用
されるようになってきた。従来から、アルミニウムの着
色は、陽極酸化処理を施したアルミニウムを、金属塩を
含有する電解着色液中で電解着色する方法でなされてい
る。しかるに、従来法によると処理すべきアルミニウム
の表面は、その形状，大きさ等により着色に濃淡が生
じ、均一でかつ美麗な着色を施すことのできない欠点が
ある。そして、均一でかつ美麗な着色を施すようにする
には、低電圧で長時間の電解処理その他種々の手間をと
り生産性が低下するという欠点がある。また、アルミニ
ウムの大きさや形状が変わると表面の着色の色調が変
り、一定した色調に着色されたアルミニウムを得ること
ができないという問題かある。2. Description of the Related Art Recently, aluminum whose surface is colored has been widely used as wall covering material for building buildings, window frame sash material and the like. Conventionally, aluminum is colored by a method of electrolytically coloring anodized aluminum in an electrolytic coloring solution containing a metal salt. However, according to the conventional method, the surface of aluminum to be treated has a drawback that it is not possible to give a uniform and beautiful color due to the light and shade of the color due to its shape, size and the like. Further, in order to carry out uniform and beautiful coloring, there is a drawback that productivity is lowered due to various efforts such as electrolytic treatment at low voltage for a long time. Further, there is a problem that when the size or shape of aluminum changes, the color tone of the surface coloring changes, and it is not possible to obtain aluminum colored in a constant color tone.
【０００３】[0003]
【発明が解決しようとする課題】本発明の目的は、生産
性を低下させることなく経済的にしかも処理すべきアル
ミニウムの大きさや形状に関係なく、着色の濃淡のない
安定した色調の均一かつ美麗な着色および色調の変化に
富んだ着色皮膜を有するアルミニウムを提供することで
ある。SUMMARY OF THE INVENTION An object of the present invention is to produce a stable and uniform color tone which is economical without lowering the productivity and irrespective of the size and shape of aluminum to be treated, and which has a stable color tone without tint of coloring. It is an object of the present invention to provide an aluminum having a colored film rich in various colorings and color tones.
【０００４】[0004]
【課題を解決するための手段】そこで、本発明者は、上
述の従来技術の問題点を解決するために種々の検討を重
ねた。その結果、電解着色処理に先立って、チタン等の
不溶性金属を電極に用いると共に、ピーク電流密度及び
ピーク電流時以降の積算電気量を制御して交流電解処理
を施すことにより、従来法の欠点を解消できることを見
い出した。本発明は、かかる知見に基いて完成したもの
である。Therefore, the inventor of the present invention has made various studies in order to solve the above-mentioned problems of the prior art. As a result, prior to the electrolytic coloring treatment, an insoluble metal such as titanium was used for the electrode, and the peak current density and the cumulative amount of electricity after the peak current were controlled to carry out the alternating current electrolytic treatment, thereby reducing the drawbacks of the conventional method. I found that it can be resolved. The present invention has been completed based on such findings.
【０００５】すなわち、本発明は、陽極酸化処理を施し
たアルミニウムまたはアルミニウム合金を、金属塩を含
有する電解浴中で電解着色処理する方法において、該電
解着色処理に先立って、不溶性金属を対極として硫酸水
溶液中で交流電解処理するとともに、該交流電解処理す
る際、通電開始から電流と通電時間との関係を表わした
通電曲線から検出されるピーク電流が所定範囲の値とな
るように電源出力電圧を設定し、該出力電圧を一定で通
電し、さらに、該ピーク電流の検出時点を基点としてそ
れ以降の積算電気量を制御することを特徴とするアルミ
ニウムまたはアルミニウム合金の電解着色方法を提供す
るものである。That is, the present invention provides a method of electrolytically coloring anodized aluminum or aluminum alloy in an electrolytic bath containing a metal salt, in which an insoluble metal is used as a counter electrode prior to the electrolytic coloring. While performing the AC electrolysis treatment in the sulfuric acid aqueous solution, at the time of the AC electrolysis treatment, the power supply output voltage is set so that the peak current detected from the energization curve showing the relationship between the current and the energization time from the start of the energization becomes a value in a predetermined range. The method for electrolytically coloring aluminum or an aluminum alloy is characterized in that the output voltage is set to a constant value, and the accumulated amount of electricity thereafter is controlled with the point of time of detection of the peak current as a base point. Is.
【０００６】本発明の方法に用いるアルミニウムは、そ
の表面に陽極酸化処理を施したものである。ここで行う
陽極酸化処理は従来から広く行われている方法でよく、
通常はアルミニウムの表面を脱脂洗浄し、これを陽極と
して、またアルミニウム，グラファイト等を陰極として
用い、硫酸，シュウ酸，スルファミン酸などの酸性電解
液中で直流通電することにより行う。The aluminum used in the method of the present invention has its surface anodized. The anodic oxidation treatment performed here may be a method widely used in the past,
Usually, the surface of aluminum is degreased and washed, and this is used as an anode, and aluminum, graphite or the like is used as a cathode, and a direct current is applied in an acidic electrolytic solution such as sulfuric acid, oxalic acid or sulfamic acid.
【０００７】次いで、陽極酸化されたアルミニウムは、
本発明において特徴とする交流電解処理（以下、「中間
処理」という。）が施される。すなわち、陽極酸化処理
を施されたアルミニウムは、不溶性金属を対極として硫
酸水溶液中で中間処理が施される。この中間処理におい
て、対極として使用される金属としては、電解処理中に
溶解しない材質のものであれば、特別に制限はなく、各
種のものが使用可能であり、チタン，チタン合金，白
金，白金メッキチタンなどがあげられる。Then, the anodized aluminum is
An alternating current electrolytic treatment (hereinafter referred to as “intermediate treatment”), which is a feature of the present invention, is performed. That is, the anodized aluminum is subjected to an intermediate treatment in an aqueous sulfuric acid solution with an insoluble metal as a counter electrode. In this intermediate treatment, the metal used as the counter electrode is not particularly limited as long as it is a material that does not dissolve during the electrolytic treatment, various types can be used, such as titanium, titanium alloy, platinum, white Examples include gold-plated titanium.
【０００８】この電解着色処理に先立って行われる中間
処理は、適当な周波数の交流電源あるいはそれと同効の
波形の電源を用いると共に電解液として硫酸酸性水溶液
を用いればよく、その操作条件等については特に限定は
ない。しかし、この中間処理における好ましい条件とし
ては、電解液中の硫酸濃度を１００〜３００ｇ／リット
ル、特に１６０〜１８０ｇ／リットルとし、電流密度0.
５〜1.５Ａ／ｄｍ2 、特に0.５〜1.０Ａ／ｄｍ2 とし、
電解液温度を１５〜２５℃の範囲に選定すべきである。The intermediate treatment carried out prior to the electrolytic coloring treatment may be carried out by using an AC power source having an appropriate frequency or a power source having a waveform having the same effect as that of the sulfuric acid acidic aqueous solution as an electrolytic solution. There is no particular limitation. However, as a preferable condition in this intermediate treatment, the sulfuric acid concentration in the electrolytic solution is 100 to 300 g / liter, particularly 160 to 180 g / liter, and the current density is 0.
5 to 1.5 A / dm 2 , especially 0.5 to 1.0 A / dm 2 ,
The electrolyte temperature should be selected in the range of 15-25 ° C.
【０００９】また本発明では、この中間処理をする際、
電源出力電圧を一定で通電すると共に、通電開始から電
流と通電時間との関係を表わした通電曲線から検出され
るピーク電流が所定範囲の値となるように電源出力電圧
を設定する。さらに、該ピーク電流の検出時点を基点と
して、所望の着色の色調に応じて電気量密度（積算電気
量密度）が一定になるようにそれ以降の電気量および通
電時間を制御することを特徴とするものである。According to the present invention, when this intermediate processing is performed,
The power supply output voltage is supplied at a constant level, and the power supply output voltage is set so that the peak current detected from the power distribution curve that represents the relationship between the current and the power distribution time from the start of power distribution is within a predetermined range. Further, with the point of time of detection of the peak current as a base point, the subsequent quantity of electricity and energization time are controlled so that the quantity of electricity quantity (accumulated electricity quantity density) becomes constant in accordance with the desired color tone. To do.
【００１０】上記中間処理にあたっては、電源出力電圧
を一定で通電するが、これは電解操作を簡略化するとと
もに、ピーク電流の検出や積算電気量の算出を容易にす
るためであり、若干の電圧の変動は差支えない。また、
ピーク電流（正しくは最大電流密度）の値は、所望する
色調や通電量（積算電気量密度）等により異なり、一義
的に定めることはできないが、一般には0.５〜1.５Ａ／
ｄｍ2 、特に0.５〜1.０Ａ／ｄｍ2 の範囲で選定すべき
である。In the above-mentioned intermediate processing, the power supply output voltage is supplied at a constant voltage for the purpose of simplifying the electrolysis operation and facilitating the detection of the peak current and the calculation of the integrated quantity of electricity. Fluctuations can be accepted. Also,
The value of the peak current (correctly the maximum current density) differs depending on the desired color tone, energization amount (integrated electricity amount density), etc. and cannot be uniquely determined, but generally 0.5-1.5 A /
It should be selected in the range of dm 2 , especially 0.5-1.0 A / dm 2 .
【００１１】本発明では、上記ピーク電流の検出時点を
基点としてそれ以降の積算電気量を制御することを特徴
としており、ここで制御する積算電気量とは、ピーク電
流の検出時点から通電終了時までの電流の通電時間積分
値である。即ち、ピーク電流の検出時点以降において
は、通電の各時間において電流値が低下してくるが、こ
の各時間における電流値を測定し、一定の積算電気量に
至った時点で通電を終了する。従って、積算電気量密度
の算出は、上記ピーク電流の検出時点を基点として、そ
れ以降に流れた電気量の合計量を基準にして行う。ここ
で通電開始からの合計電気量を積算電気量密度として制
御すると、誤差が大きく、たとえ積算電気量密度を一定
に制御しても、着色の再現性が悪く、色調が一定せず本
発明の目的を達成することができない。この積算電気量
密度の値は、ピーク電流や所望する色調等により異な
り、一義的に定めることはできない。しかし、例えばピ
ーク電流が0.８〜1.０Ａ／ｄｍ2の場合には、１０〜５
０Ｑ／ｄｍ2 、特に１０〜２５Ｑ／ｄｍ2 の範囲で一定
値に設定すれば、アルミニウム表面に所望する色調の着
色を再現性よく施すことができる。The present invention is characterized in that the cumulative amount of electricity thereafter is controlled with the point of time of detection of the peak current as a base point, and the cumulative amount of electricity controlled here is from the point of time of detection of the peak current to the end of energization. Is the integral value of the current flow time. That is, after the peak current is detected, the current value decreases at each time of energization, but the current value at each time is measured, and the energization ends when a certain accumulated amount of electricity is reached. Therefore, the calculation of the integrated electricity quantity density is performed with the time point at which the peak current is detected as a base point and the total quantity of electricity flowing thereafter as a reference. If the total amount of electricity from the start of energization is controlled as the integrated amount of electricity density, there is a large error. Even if the integrated amount of electricity amount is controlled to be constant, the reproducibility of coloring is poor and the color tone is not constant. I cannot achieve my purpose. The value of this integrated electricity quantity density varies depending on the peak current, the desired color tone, etc. and cannot be uniquely determined. However, if the peak current is 0.8 to 1.0 A / dm 2 , for example, 10 to 5
By setting a constant value in the range of 0Q / dm 2 , especially 10 to 25Q / dm 2 , it is possible to reproducibly apply a desired color tone to the aluminum surface.
【００１２】このように、陽極酸化処理を施したアルミ
ニウムに、不溶性金属を対極として硫酸水溶液中で上述
した制御の下に中間処理を施し、その後に金属塩を含有
する電解浴中で電解着色処理を施すと、処理すべきアル
ミニウムの形状，大きさ等にかかわらず着色に濃淡の差
異がなく安定したしかも均一かつ美麗に着色されたアル
ミニウムを得ることができる。Thus, the anodized aluminum is subjected to an intermediate treatment under the above-mentioned control in an aqueous solution of sulfuric acid with an insoluble metal as a counter electrode, followed by electrolytic coloring treatment in an electrolytic bath containing a metal salt. By applying the above, it is possible to obtain aluminum which is stable, uniform, and beautifully colored without any difference in color tone regardless of the shape and size of aluminum to be treated.
【００１３】本発明においては、上述の中間処理の条件
（ピーク電流や積算電気量）を適宜選定し、しかる後に
電解着色処理を施すと、処理条件にしたがって所望する
種々の色調に着色されたアルミニウムを得ることができ
る。本発明の方法では、上記中間処理を行った後に電解
着色処理を行う。この電解着色処理は、各種の金属塩
（錫塩，銅塩，ニッケル塩，コバルト塩，鉄塩等）を含
み、所望により硫酸，リン酸，クロム酸等の無機酸やス
ルホン酸，酢酸等の有機酸を加えた酸水溶液を電解液
（電解浴）として用いて交流通電することにより進行す
る。この際の条件は、通常の電解着色処理の条件に従っ
て定めればよい。具体的には電解電圧５〜３０Ｖ、好ま
しくは１０〜１５Ｖ、電流密度0.３〜1.５Ａ／ｄｍ2 、
好ましくは0.５〜1.０Ａ／ｄｍ2 とし、電解時間３０〜
１８０秒の範囲で定めればよい。なお、対極としては、
炭素，錫，ニッケル，鉛，アルミニウム，ステンレスス
チールなどを用いてもよく、あるいは中間処理に用いた
チタンやチタン合金等の不溶性金属を用いることもでき
る。In the present invention, when the above-mentioned conditions of the intermediate treatment (peak current and integrated amount of electricity) are appropriately selected and then electrolytic coloring treatment is applied, aluminum colored in various desired color tones according to the treatment conditions is obtained. Can be obtained. In the method of the present invention, the electrolytic coloring treatment is performed after the intermediate treatment. This electrolytic coloring treatment contains various metal salts (tin salt, copper salt, nickel salt, cobalt salt, iron salt, etc.), and if desired, inorganic acids such as sulfuric acid, phosphoric acid, chromic acid, sulfonic acid, acetic acid, etc. It proceeds by applying an alternating current using an aqueous acid solution containing an organic acid as an electrolytic solution (electrolytic bath). The conditions at this time may be set according to the conditions of the usual electrolytic coloring treatment. Specifically, the electrolysis voltage is 5 to 30 V, preferably 10 to 15 V, the current density is 0.3 to 1.5 A / dm 2 ,
It is preferably 0.5 to 1.0 A / dm 2 , and the electrolysis time is 30 to
It may be set within the range of 180 seconds. As a counter electrode,
Carbon, tin, nickel, lead, aluminum, stainless steel or the like may be used, or an insoluble metal such as titanium or titanium alloy used in the intermediate treatment may be used.
【００１４】本発明の方法を利用してアルミニウムに着
色を施すには、通常のアルミニウムの電解着色分野にお
いて実施されているような陽極酸化処理装置および電解
着色処理装置を使用し、また該電解着色処理に先立って
チタンまたはチタン合金を対極とした中間処理装置を使
用すればよい。あるいは、陽極酸化処理および中間処理
は、同一の電解槽を用いて陽極酸化処理後、電源を交流
電源とし、また電極を不溶性金属に取り替えてから中間
処理を行ってもよい。In order to color aluminum using the method of the present invention, an anodizing treatment apparatus and an electrolytic coloring treatment apparatus such as those practiced in the usual aluminum electrolytic coloring field are used, and the electrolytic coloring is performed. Prior to the treatment, an intermediate treatment device having titanium or a titanium alloy as a counter electrode may be used. Alternatively, the anodic oxidation treatment and the intermediate treatment may be performed after the anodic oxidation treatment using the same electrolytic bath, using an AC power source as the power source and replacing the electrode with an insoluble metal.
【００１５】[0015]
【実施例】さらに、本発明を実施例および比較例により
詳しく説明するが、本発明は、これらの実施例によって
限定されるものではない。なお、以下の実施例および比
較例においてアルミニウムは、ＪＩＳ Ａ ６０６３ー
Ｔ5 材を大きさを変え、予め通常実施されている方法で
脱脂，水洗，エッチング，水洗，中和及び水洗を順次行
って前処理したものを使用した。The present invention will be further described in detail with reference to Examples and Comparative Examples, but the present invention is not limited to these Examples. In the following examples and comparative examples, the aluminum is JIS A 6063-T 5 material of which size is changed, and degreasing, water washing, etching, water washing, neutralization and water washing are sequentially performed by a method which is usually carried out in advance. A pretreated product was used.
【００１６】実施例１ 長さ１０００ｍｍ×巾７５０ｍｍ×深さ６００ｍｍの電
解槽に、Ｈ2 ＳＯ4 １８２ｇ／リットル，溶解Ａｌイオ
ン4.１ｇ／リットルを含む電解液を仕込み、チタンを陰
極とし、大きさ４０ｄｍ2 のアルミニウムを陽極として
電流密度２Ａ／ｄｍ2 ，温度１８℃で、２０分間陽極酸
化処理した。次いで、上記電解槽中でチタンを対極とし
て、陽極酸化処理を施したアルミニウムを、第１表に示
す条件で定電圧のよる交流電解処理（中間処理）を行っ
た。なお、この中間処理の最終電圧は3.１Ｖであった。
さらに、別の電解槽に、Ｈ2 ＳＯ4 ４５ｇ／リットル，
ＳｎＳＯ4 9.５ｇ／リットルを含む電解着色液を仕込
み、液温２０℃, 電圧１５Ｖで、１２０秒間電解着色処
理を行った。得られた着色結果を第１表に示す。Example 1 An electrolytic cell having a length of 1000 mm × a width of 750 mm × a depth of 600 mm was charged with an electrolytic solution containing 182 g / liter of H 2 SO 4 and 4.1 g / liter of dissolved Al ions, and titanium was used as a cathode, and a large size was obtained. It is a current density of 2A / dm 2 aluminum 40Dm 2 as an anode, at a temperature 18 ° C., was anodized for 20 minutes. Next, in the above electrolytic cell, anodized aluminum was subjected to alternating current electrolytic treatment (intermediate treatment) with constant voltage under the conditions shown in Table 1 with titanium as a counter electrode. The final voltage of this intermediate treatment was 3.1V.
Furthermore, in another electrolytic cell, H 2 SO 4 45 g / liter,
An electrolytic coloring solution containing SnSO 4 9.5 g / liter was charged, and electrolytic coloring treatment was performed for 120 seconds at a liquid temperature of 20 ° C. and a voltage of 15V. The coloring results obtained are shown in Table 1.
【００１７】実施例２ アルミニウムの大きさを６０ｄｍ2 に変え、交流電解処
理条件を第１表に示す条件としたこと以外は、実施例１
と同様に実施した。得られた着色結果を第１表に示す。Example 2 Example 1 was repeated except that the size of aluminum was changed to 60 dm 2 and the AC electrolytic treatment conditions were those shown in Table 1.
It carried out similarly to. The coloring results obtained are shown in Table 1.
【００１８】実施例３ アルミニウムの大きさを８０ｄｍ2 に変え、交流電解処
理条件を第１表に示す条件としたこと以外は、実施例１
と同様に実施した。得られた着色結果を第１表に示す。Example 3 Example 1 was repeated except that the size of aluminum was changed to 80 dm 2 and the AC electrolytic treatment conditions were those shown in Table 1.
It carried out similarly to. The coloring results obtained are shown in Table 1.
【００１９】[0019]
【表１】 [Table 1]
【００２０】第１表から、本発明の方法によれば、アル
ミニウムの大きさにかかわらず同一色調に着色されたア
ルミニウムが得られていることが判る。From Table 1, it can be seen that according to the method of the present invention, aluminum colored in the same color tone is obtained regardless of the size of aluminum.
【００２１】[0021]
【発明の効果】本発明の電解着色方法によれば、形状や
大きさにかかわらず、アルミニウムの表面に着色の濃淡
のない安定したしかも均一かつ美麗な着色を施すことが
でき、建築ビルの壁装材、窓枠サッシ材料などに使用し
た場合に装飾効果を高めることがてきる。しかも、簡単
な操作だけで変化に富んだ色調を施すことができる。し
たがって、本発明の方法は、アルミニウムに安定した色
調の美麗な着色を施す方法として、その工業的利用価値
は極めて大きい。According to the electrolytic coloring method of the present invention, regardless of the shape or size, the surface of aluminum can be colored in a stable, uniform, and beautiful manner without any shade of coloring, and the wall of a building can be colored. The decorative effect can be enhanced when it is used as a covering material or a window frame sash material. Moreover, a variety of color tones can be applied by a simple operation. Therefore, the method of the present invention has an extremely great industrial utility value as a method of beautifully coloring aluminum with a stable color tone.
Claims (2)
アルミニウム合金を、金属塩を含有する電解浴中で電解
着色処理する方法において、該電解着色処理に先立っ
て、不溶性金属を対極として硫酸水溶液中で交流電解処
理するとともに、該交流電解処理する際、通電開始から
電流と通電時間との関係を表わした通電曲線から検出さ
れるピーク電流が所定範囲の値となるように電源出力電
圧を設定し、該出力電圧を一定で通電し、さらに、該ピ
ーク電流の検出時点を基点としてそれ以降の積算電気量
を制御することを特徴とするアルミニウムまたはアルミ
ニウム合金の電解着色方法。1. A method of electrolytically coloring anodized aluminum or an aluminum alloy in an electrolytic bath containing a metal salt, in which an insoluble metal is used as a counter electrode in an aqueous sulfuric acid solution prior to the electrolytic coloring. During the AC electrolysis treatment, the power supply output voltage is adjusted so that the peak current detected from the energization curve representing the relationship between the current and the energization time from the start of energization falls within a predetermined range during the AC electrolysis treatment.
A method for electrolytically coloring aluminum or an aluminum alloy, comprising setting a pressure , energizing the output voltage at a constant level, and controlling an integrated amount of electricity thereafter, based on a point of time when the peak current is detected.
である請求項１記載のアルミニウムまたはアルミニウム
合金の電解着色方法。2. The electrolytic coloring method for aluminum or aluminum alloy according to claim 1, wherein the insoluble metal is titanium or titanium alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3138857A JP2534805B2 (en) | 1991-06-11 | 1991-06-11 | Electrolytic coloring method of aluminum or aluminum alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3138857A JP2534805B2 (en) | 1991-06-11 | 1991-06-11 | Electrolytic coloring method of aluminum or aluminum alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04362197A JPH04362197A (en) | 1992-12-15 |
| JP2534805B2 true JP2534805B2 (en) | 1996-09-18 |
Family
ID=15231771
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3138857A Expired - Fee Related JP2534805B2 (en) | 1991-06-11 | 1991-06-11 | Electrolytic coloring method of aluminum or aluminum alloy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2534805B2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS599196A (en) * | 1982-07-09 | 1984-01-18 | Nippon Kentetsu Co Ltd | Electrolytic pigmenting method of aluminum |
-
1991
- 1991-06-11 JP JP3138857A patent/JP2534805B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04362197A (en) | 1992-12-15 |
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