JPH08281208A - Pretreatment for coating of ground part of aluminum alloy - Google Patents
Pretreatment for coating of ground part of aluminum alloyInfo
- Publication number
- JPH08281208A JPH08281208A JP10792395A JP10792395A JPH08281208A JP H08281208 A JPH08281208 A JP H08281208A JP 10792395 A JP10792395 A JP 10792395A JP 10792395 A JP10792395 A JP 10792395A JP H08281208 A JPH08281208 A JP H08281208A
- Authority
- JP
- Japan
- Prior art keywords
- coating
- ground
- zinc phosphate
- grinding
- aluminum alloy
- 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
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、アルミニウム合金研削
部の塗装前処理方法、とくに自動車車体パネル用アルミ
ニウム合金を成形加工後に表面を研削する場合、研削部
の塗装後耐食性を劣化させない研削部の塗装前処理方法
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for pretreatment of coating of an aluminum alloy grinded portion, and more particularly, when a surface of an aluminum alloy for an automobile body panel is ground after molding, a grinding portion of a grinded portion which does not deteriorate corrosion resistance after coating The pretreatment method for painting.
【０００２】[0002]
【従来の技術】自動車車体パネル用アルミニウム合金板
については、通常、プレス成形により所定形状に成形加
工したのち、同時に使用される鋼板、表面処理鋼板とと
もに、塗装の前処理としてリン酸亜鉛処理液による塗装
下地処理が行われる。2. Description of the Related Art Aluminum alloy sheets for automobile body panels are usually formed by press forming into a predetermined shape, and then, together with a steel sheet and a surface-treated steel sheet, a zinc phosphate treatment solution is used as a pretreatment for coating. A coating base treatment is performed.
【０００３】自動車車体パネル用アルミニウム合金とし
ては、Ｍｇを主要合金成分として含む５０００系のＡｌ
−Ｍｇ系合金、ＳｉおよびＭｇを必須合金成分として含
有する６０００系のＡｌ−Ｓｉ−Ｍｇ系合金が多く使用
されているが、アルミニウム合金のリン酸亜鉛処理性
は、一般に合金成分によって変動し易く、同一条件でリ
ン酸亜鉛処理を行っても、合金組成によっては処理性が
わるく十分な量のリン酸亜鉛皮膜が生成しない場合が少
なくない。As an aluminum alloy for automobile body panels, 5000 series Al containing Mg as a main alloying component.
-Mg-based alloys, 6000-based Al-Si-Mg-based alloys containing Si and Mg as essential alloying components are often used, but the zinc phosphate treatability of aluminum alloys generally tends to vary depending on the alloying components. Even when the zinc phosphate treatment is performed under the same conditions, depending on the alloy composition, the processability may be poor and a sufficient amount of zinc phosphate coating may not be formed.
【０００４】とくに、Ｃｕの影響が大きく、例えばＡｌ
−５％Ｍｇ合金を例として、Ｃｕ含有量の影響を示す
と、図１に示すように、リン酸亜鉛皮膜の皮膜生成量は
Ｃｕの含有量の増加とともに多くなる。（図１の非研削
材についてのグラフ参照）Ｃｕ含有量が0.10％未満にお
いては、リン酸亜鉛皮膜量が不十分となるため、通常、
塗装後の金属／塗膜界面の密着性、耐膨れ性がわるく、
耐糸錆性などの耐食性が劣ることになる。In particular, the influence of Cu is large, and for example, Al
Taking the effect of Cu content as an example of a -5% Mg alloy, as shown in FIG. 1, the film formation amount of the zinc phosphate film increases as the Cu content increases. (Refer to the graph for the non-abrasive material in FIG. 1) When the Cu content is less than 0.10%, the zinc phosphate coating amount becomes insufficient, so
Poor adhesion and swelling resistance at the metal / coating interface after painting,
Corrosion resistance such as thread rust resistance will be poor.
【０００５】一方、Ａｌ−Ｍｇ系合金などの自動車車体
パネル用アルミニウム合金の板材においては、プレス成
形加工時に生じた傷などの表面欠陥を補修するために、
研磨紙などを使用して成形加工後に局部的または全面の
表面研削を行うことが少なくない。しかしながら、研削
部にリン酸亜鉛処理を行った場合、非研削部に比べてリ
ン酸亜鉛処理性が劣り、とくにＣｕ量の多いＡｌ−Ｍｇ
系合金材では、図１に示すように、非研削部と研削部と
におけるリン酸亜鉛皮膜の生成量に大きな差が生じる。
（図１の研削材についてのグラフ参照）On the other hand, in plate materials of aluminum alloys for automobile body panels such as Al-Mg alloys, in order to repair surface defects such as scratches generated during press forming,
It is not uncommon for the surface of the entire surface to be locally or entirely ground after the molding process using abrasive paper. However, when the ground portion is treated with zinc phosphate, the zinc phosphate treatment is inferior to that in the non-ground portion, and particularly Al-Mg having a large amount of Cu is used.
As shown in FIG. 1, in the alloy-based alloy material, there is a large difference in the amount of zinc phosphate film formed between the non-ground portion and the ground portion.
(See the graph for the abrasive material in Figure 1)
【０００６】すなわち、研削部ではリン酸亜鉛皮膜量が
減少するため、塗膜の密着性がわるく塗装後の耐食性劣
化の原因となり易い。研削部のリン酸亜鉛処理性を改善
するために種々の方策が提案されており、発明者らも、
Ａｌ−Ｍｇ系合金の研削部のリン酸処理性を向上させる
ために、研削部を無機酸または無機酸を主成分とする溶
液で洗浄したのちリン酸亜鉛処理する方法（特願平6-25
1284号) 、研削をアルミニウムより貴な金属およびそれ
らの金属の酸化物のうちの１種以上の存在下で行う方法
（特願平6-259247号) を提案した。That is, since the zinc phosphate coating amount is reduced in the grinding portion, the adhesion of the coating film is poor and the corrosion resistance tends to deteriorate after coating. Various measures have been proposed in order to improve the zinc phosphate processability of the ground portion, and the inventors have also
In order to improve the phosphoric acid treatment property of the grinding part of the Al-Mg alloy, the grinding part is washed with an inorganic acid or a solution containing an inorganic acid as a main component and then treated with zinc phosphate (Japanese Patent Application No. 6-25
1284), and a method (Japanese Patent Application No. 6-259247) in which grinding is performed in the presence of at least one of metals nobler than aluminum and oxides of those metals.
【０００７】しかし、その後の研究において、研削部の
リン酸亜鉛処理性を向上させても、耐食性、とくに耐糸
錆性は改善されず、非研削部と同等の耐糸錆性を得るこ
とが難しい場合があることが見出された。発明者らの行
った実験の一部概略を示すと、Ａｌ−５％Ｍｇ合金板に
ついて、表面研削を行わない非研削材および研磨紙を用
いて研削を行った研削材を作製し、それぞれ時間を変え
てリン酸亜鉛処理を行ったのち、各試験材についてリン
酸亜鉛皮膜量を測定し、塗装後、塗膜にカッターナイフ
で基地に達するクロスカットを施して塩水噴霧試験を行
い、試験開始後４週間および８週間経過時に生じている
糸錆の長さを測定した。However, in the subsequent research, even if the zinc phosphate treatment property of the ground portion was improved, the corrosion resistance, particularly the thread rust resistance was not improved, and the thread rust resistance equivalent to that of the non-ground portion was obtained. It has been found to be difficult in some cases. The following is a partial outline of the experiments conducted by the inventors. For Al-5% Mg alloy plates, a non-abrasive material without surface grinding and an abrasive material that was ground with abrasive paper were prepared and After the zinc phosphate treatment is performed under different conditions, the amount of zinc phosphate coating is measured for each test material, and after coating, the coating is cross-cut to reach the base with a cutter knife, and a salt spray test is performed to start the test. The length of the thread rust that occurred 4 weeks and 8 weeks thereafter was measured.
【０００８】その結果、図２に示すように、非研削材に
おいては、リン酸亜鉛処理を行わない試験材（非研削材
（0min))に比べて、2 分間のリン酸亜鉛処理を行った試
験材は耐糸錆性が向上している。他方、リン酸亜鉛処理
を行った非研削材と研削材とを比較すると、2 分間のリ
ン酸亜鉛処理を行った場合には、研削材ではリン酸亜鉛
皮膜量が減少し、耐糸錆性が顕著に劣化している。As a result, as shown in FIG. 2, the non-abrasive material was treated with zinc phosphate for 2 minutes as compared with the test material (non-abrasive material (0 min)) which was not treated with zinc phosphate. The test material has improved yarn rust resistance. On the other hand, comparing the non-abrasive material treated with zinc phosphate and the abrasive, when zinc phosphate treatment for 2 minutes was performed, the amount of zinc phosphate coating decreased in the abrasive and the thread rust resistance Is significantly deteriorated.
【０００９】この結果からみると、耐糸錆性の劣化はリ
ン酸亜鉛皮膜量の減少に起因するように考えられるが、
リン酸亜鉛処理時間を5 分間に増加して非研削材(2min)
よりリン酸亜鉛皮膜量を多くした研削材(5min)の耐糸錆
性は非研削材(2min)より劣っており、研削部において、
非研削部以上にリン酸亜鉛皮膜量を増加させても、非研
削部と同等の十分な耐糸錆性が得られない場合があるこ
とが認められる。From these results, it is considered that the deterioration of the thread rust resistance is due to the decrease of the zinc phosphate coating amount.
Zinc phosphate treatment time increased to 5 minutes for non-abrasive material (2 min)
The rust resistance of the abrasive material (5 min) with a larger zinc phosphate coating amount is inferior to that of the non-abrasive material (2 min).
It is recognized that even if the zinc phosphate coating amount is increased above the non-ground portion, sufficient thread rust resistance equivalent to that of the non-ground portion may not be obtained.
【００１０】Ａｌ−Ｍｇ系合金の表面研削部の塗装後の
耐糸錆性と材料の表面形状についての研究も行われてお
り、研削部においては、表面粗さが大きいほどリン酸亜
鉛皮膜の析出が不均一となるとともにリン酸亜鉛処理性
もわるくなり、塗装後の耐糸錆性が低下することが報告
されている。（軽金属学会第81回秋期大会講演概要第19
5 〜196 頁)Studies have been conducted on the rust resistance after coating of the surface-ground portion of an Al-Mg alloy and the surface shape of the material. In the ground portion, the larger the surface roughness, the more the zinc phosphate coating is formed. It has been reported that the precipitation becomes non-uniform and the zinc phosphate treatment becomes poor, and the thread rust resistance after coating is lowered. (Summary of the 81st Autumn Meeting of the Japan Institute of Light Metals 19th
(Pp. 5 to 196)
【００１１】発明者らは、Ａｌ−Ｍｇ系合金材につい
て、表面研削部の塗装後の耐糸錆性に対する研削部の表
面粗さの影響について確認するために、Ａｌ−５％Ｍｇ
合金板を研磨紙で研削した試験材、およびスクレーパー
で研削した試験材を作製し、ほぼ同一量のリン酸亜鉛皮
膜を形成して塗装した後の耐糸錆性を評価した。その結
果、スクレーパー研削材の表面粗さは研磨紙研削材の表
面粗さに比べて大きいにもかかわらず、スクレーパー研
削材は研磨紙研削材より耐糸錆性が顕著に優れており、
非研削部と同等の耐糸錆性を有していた。従って研削部
の表面粗さが耐糸錆性に影響するとは必ずしもいえない
ことが判明したが、発明者らの観察によると、糸錆の発
生方向が非研削部では圧延方向と一致し、研削部では圧
延方向と無関係に研削方向とよく一致していることか
ら、表面粗さ以外の研削部の表面性状が糸錆の発生に関
与していることが予測された。With respect to the Al-Mg alloy material, the present inventors have confirmed the influence of the surface roughness of the ground portion on the surface rust resistance of the ground portion after coating in order to confirm the effect of Al-5% Mg.
A test material in which the alloy plate was ground with abrasive paper and a test material in which the alloy plate was ground with a scraper were prepared, and the same amount of zinc phosphate coating was formed and the thread rust resistance after coating was evaluated. As a result, even though the surface roughness of the scraper abrasive is larger than the surface roughness of the abrasive paper abrasive, the scraper abrasive has significantly better yarn rust resistance than the abrasive paper abrasive,
It had the same rust resistance as the non-ground portion. Therefore, it was found that the surface roughness of the ground portion does not necessarily affect the yarn rust resistance, but according to the observations of the inventors, the direction in which the yarn rust occurs corresponds to the rolling direction in the non-ground portion, and Since the part has a good agreement with the grinding direction regardless of the rolling direction, it was predicted that the surface properties of the ground part other than the surface roughness were involved in the occurrence of thread rust.
【００１２】[0012]
【発明が解決しようとする課題】本発明は、Ａｌ−Ｍｇ
系合金などアルミニウム合金材の研削部における塗装後
の耐糸錆性を向上させるために、研削部の表面形状のう
ち表面粗さ以外の因子と、リン酸亜鉛処理性および塗装
後の耐糸錆性との関連性について、さらに実験、検討を
行った結果としてなされたものであり、その目的は、研
削部における塗装後の耐糸錆性を、非研削部と同等また
は同等以上に改善できるアルミニウム合金研削部の塗装
前処理方法を提供することにある。The present invention is directed to Al-Mg
In order to improve the thread rust resistance after coating in the grinding part of aluminum alloy materials such as series alloys, factors other than surface roughness in the surface shape of the grinding part, zinc phosphate treatment and thread rust resistance after coating The result was the result of further experiments and investigations regarding the relationship with the toughness, and the purpose was to improve the thread rust resistance after painting in the ground part to the same level as or better than the non-ground part. An object of the present invention is to provide a method for pretreatment of coating of an alloy grinding part.
【００１３】[0013]
【課題を解決するための手段】上記の目的を達成するた
めの本発明によるアルミニウム合金研削部の塗装前処理
方法は、アルミニウム合金材の研削表面を、倍率が４０
０倍以下の光学顕微鏡で観察したとき多数の割れ目状の
凹部が存在しない滑らかな面に仕上げ研削したのち、リ
ン酸亜鉛処理することを構成上の基本的特徴とする。In order to achieve the above object, a method of pretreatment for coating an aluminum alloy ground portion according to the present invention is a grinding surface of an aluminum alloy material having a magnification of 40.
The basic feature of the constitution is that after observing with an optical microscope at a magnification of 0 or less, finish grinding is performed on a smooth surface without a large number of crack-shaped recesses, and then zinc phosphate treatment is performed.
【００１４】また、研削部がバフ研磨により仕上げ研削
されていること、および研削部がスクレーパー研削によ
り仕上げ研削されていることを構成上の第２、第３の特
徴とし、アルミニウム合金がＡｌ−Ｍｇ系合金またはＡ
ｌ−Ｓｉ−Ｍｇ系合金であることを第４の特徴とする。The second and third characteristics of the construction are that the grinding portion is finish-ground by buffing and that the grinding portion is finish-grinding by scraper grinding. The aluminum alloy is Al--Mg. System alloy or A
The fourth characteristic is that the alloy is an l-Si-Mg-based alloy.
【００１５】本発明において、多数の割れ目状の凹部
は、倍率が１００〜４００倍の光学顕微鏡で観察される
もので、開口部が90°未満の凹部を含む凹凸、研削によ
り材料の素地がめくれ、あるいは盛り上がり、それが素
地にかぶさって、素地が二重に折り重なっているものな
どを含む。これらの表面性状を有する箇所は、腐食液が
浸透し易く、耐糸錆性を劣化させるものと考えられる。In the present invention, a large number of crack-shaped recesses are observed with an optical microscope having a magnification of 100 to 400 times, and the base material of the material is turned up and down by unevenness including recesses having an opening of less than 90 ° and grinding. , Or swelling, which covers the substrate and the substrate is double-folded. It is considered that the corrosive liquid easily penetrates into the portions having these surface textures and deteriorates the thread rust resistance.
【００１６】上記の表面形状は、例えば研磨紙により研
磨した場合に形成されるが、研磨紙による研削後、バフ
研磨あるいはスクレーパー研削で仕上げ研削を行うこと
によって、これらの凹部が除去され、滑らかな表面を得
ることができる。なお、表面研削については、最初から
スクレーパーなどによる研削を行っても平滑面を形成す
ることができる。The above-mentioned surface shape is formed, for example, when it is polished with abrasive paper. After the grinding with the abrasive paper, the finish is ground by buffing or scraper grinding so that these recesses are removed and smooth. The surface can be obtained. Regarding surface grinding, a smooth surface can be formed even if grinding is performed with a scraper or the like from the beginning.
【００１７】[0017]
【作用】本発明においては、アルミニウム合金材を成形
加工後に局部的にまたは全面を研削してリン酸亜鉛処理
を行い塗装する場合、研削部の表面を倍率が４００倍以
下の光学顕微鏡で観察したとき多数の割れ目状の凹部が
存在しない滑らかな面に仕上げ研削することにより、腐
食液が侵入し易い凹部が除去されて、リン酸亜鉛処理、
塗装後の糸錆の発生が少なくなる。In the present invention, when the aluminum alloy material is locally machined or entirely ground after forming and zinc phosphate treatment is applied, the surface of the ground portion is observed by an optical microscope with a magnification of 400 times or less. At this time, by finishing grinding to a smooth surface without many crack-shaped recesses, the recesses where corrosive liquid easily enters are removed, and zinc phosphate treatment,
Less occurrence of thread rust after painting.
【００１８】[0018]
【実施例】以下、本発明の実施例を比較例と対比して説
明する。 実施例１ Ｍｇ4.5 ％およびＣｕ0.3 ％を含有するＡｌ−Ｍｇ合金
の圧延板( 厚さ1mm)の焼鈍材（Ｏ材) を試験材( 寸法：
70mm×150mm)とし、各試験材について、下記に示す条件
で、研削およびリン酸亜鉛処理を行い、蛍光Ｘ線分析法
によりリン酸亜鉛皮膜量を測定した。なお、試験材の表
面はダル仕上げで、表面粗さは、平均粗さ（Ｒａ）1.07
μm 、最大粗さ（Ｒｔ）8.5 μm であった。Hereinafter, examples of the present invention will be described in comparison with comparative examples. Example 1 An annealed material (O material) of a rolled plate (thickness 1 mm) of an Al-Mg alloy containing 4.5% Mg and 0.3% Cu was used as a test material (dimensions:
70 mm × 150 mm), each test material was ground and treated with zinc phosphate under the following conditions, and the amount of zinc phosphate film was measured by a fluorescent X-ray analysis method. The surface of the test material was dull finished, and the surface roughness was an average roughness (Ra) of 1.07.
The maximum roughness (Rt) was 8.5 μm.
【００１９】研削 １．研磨紙による研削 180 番のアルミナ研磨剤を用いた研磨紙で、試験材の表
面を一定方向に研削する。 ２．バフ研磨 上記研磨紙による研削跡が消えるまでバフ研磨を行う。
具体的研磨方法としては、研磨紙の番手を180 、次いで
400 、続いて1200と、序々に研磨目を細かくして研磨
し、最後に微粒研磨剤を含有させたバフ研磨布で研磨し
て鏡面に近い表面とする工程による。 ３．スクレーパー 上記研磨紙による研削跡が消えるまでスクレーパー研削
を行う。Grinding 1. Grinding with abrasive paper Polish the surface of the test material in a certain direction with abrasive paper using No. 180 alumina abrasive. 2. Buff polishing Buff polishing is performed until the grinding marks on the polishing paper disappear.
As a concrete polishing method, the number of the polishing paper is 180, then
400, then 1200, and the like, by gradually finely grinding and polishing, and finally by a buffing cloth containing a fine-grained polishing agent to obtain a surface close to a mirror surface. 3. Scraper Scraper grinding is performed until the grinding marks by the above-mentioned abrasive paper disappear.
【００２０】リン酸亜鉛処理 次の１．〜３．の順で行なった。 １．脱脂処理 市販のアルカリ脱脂剤( 日本パーカライジング( 株) 製
FC-L4460) を使用して43℃の温度で2 分間浸漬。 ２．表面調整 市販のチタン系表面調整剤（日本パーカライジング
（株）製PL-4040)を使用して室温で30秒間浸漬。 ３．化成処理 市販のリン酸亜鉛処理剤（日本パーカライジング（株）
製PB-L3020を使用して43℃の温度で2 分間浸漬。Zinc phosphate treatment 1. ~ 3. It was done in order. 1. Degreasing treatment Commercially available alkaline degreasing agent (Nippon Parkerizing Co., Ltd.
FC-L4460) for 2 minutes at 43 ° C. 2. Surface conditioning Soak for 30 seconds at room temperature using a commercially available titanium-based surface conditioning agent (PL-4040 manufactured by Nippon Parkerizing Co., Ltd.). 3. Chemical conversion treatment Commercially available zinc phosphate treatment agent (Nihon Parkerizing Co., Ltd.)
Soaked for 2 minutes at a temperature of 43 ° C using PB-L3020 manufactured by K.K.
【００２１】リン酸亜鉛処理した各試験材を、自動車用
３コート塗装（カチオン電着、中塗り、上塗り）を施
し、総膜厚90μm の塗膜を形成した。塗膜形成後、各試
験材の表面に、カッターナイフで素地に達するクロスカ
ットを施したのち、塩水噴霧(5％NaCl、35℃×24h)後、
水洗し、次いで湿潤(RH80 ％、50℃×1000h)する条件で
塩水噴霧試験を行い、試験開始後４週間および８週間経
過後に生じている糸錆の長さを測定した。各試験材のリ
ン酸亜鉛皮膜の生成量および糸錆の長さの測定結果を図
３に示す。Each test material treated with zinc phosphate was subjected to a three-coat coating for automobiles (cationic electrodeposition, intermediate coating and top coating) to form a coating film having a total film thickness of 90 μm. After forming the coating film, after cross-cutting to reach the substrate with a cutter knife on the surface of each test material, after spraying salt water (5% NaCl, 35 ° C × 24 h),
A salt spray test was carried out under the conditions of washing with water and then wetting (RH 80%, 50 ° C. × 1000 h), and the length of thread rust generated 4 weeks and 8 weeks after the start of the test was measured. FIG. 3 shows the measurement results of the amount of zinc phosphate film formed and the length of thread rust of each test material.
【００２２】図３に示されるように、スクレーパー研削
による仕上げ研削を行った試験材およびバフ研磨による
仕上げ研削を行った試験材は、研磨紙のみにより研削を
行った試験材に比べ、リン酸亜鉛皮膜の生成量は同程度
であるが、耐糸錆性は著しく優れており、非研削材と同
等または同等以上の耐糸錆性を示した。As shown in FIG. 3, the test material subjected to finish grinding by scraper grinding and the test material subjected to finish grinding by buffing, compared with the test material ground only with abrasive paper, were zinc phosphate. Although the amount of film formed was about the same, the yarn rust resistance was remarkably excellent, and the yarn rust resistance was equal to or higher than that of the non-abrasive material.
【００２３】各試験材の表面性状を調査するために、表
面粗さを測定し、試験材断面を倍率４００倍の光学顕微
鏡で観察した。その結果、表面粗さについては、研磨紙
のみで研削した試験材はＲａ0.8 μm 、Ｒｔ11.7μm 、
バフ研磨により仕上げ研削を行った試験材はＲａ0.1 μ
m 、Ｒｔ0.6 μm 、スクレーパー研削により仕上げ研削
を行った試験材はＲａ0.8 μm 、Ｒｔ20.7μm で、バフ
研磨材が最も表面粗さが小さく、スクレーパー研削材は
研磨紙研削材に比べて、むしろ表面粗さは大きい。In order to investigate the surface properties of each test material, the surface roughness was measured and the cross section of the test material was observed with an optical microscope at a magnification of 400 times. As a result, regarding the surface roughness, the test material ground with only abrasive paper had Ra 0.8 μm, Rt 11.7 μm,
Ra 0.1 μ is the test material that was finish ground by buffing.
m, Rt 0.6 μm, and the test materials that were finished ground by scraper grinding were Ra 0.8 μm and Rt 20.7 μm, the buff abrasive had the smallest surface roughness, and the scraper abrasive was more abrasive than the abrasive paper abrasive. However, the surface roughness is rather large.
【００２４】一方、図４〜６に示す光学顕微鏡（倍率：
４００倍）による試験材断面の観察結果によれば、バフ
研磨により仕上げられた試験材が最も平坦な表面性状を
示している。スクレーパー研削材は平坦度はバフ研磨材
に劣るが、バフ研磨材と同様の滑らかな表面形状を呈す
る。これに対して、研磨紙のみで研削した試験材の表面
には、割れ目状の凹部を含む多数の凹凸が観察され、バ
フ研磨材およびスクレーパー研削材に比べて、表面性状
が顕著に異っている。On the other hand, the optical microscope shown in FIGS.
According to the observation result of the cross section of the test material by 400 times), the test material finished by buffing has the flattest surface texture. The scraper abrasive material is inferior in flatness to the buff abrasive material, but exhibits a smooth surface shape similar to that of the buff abrasive material. On the other hand, on the surface of the test material ground only with abrasive paper, many irregularities including crack-shaped recesses were observed, and the surface texture was significantly different from that of the buff abrasive and scraper abrasive. There is.
【００２５】実施例２ Ｓｉ0.75％、Ｍｇ0.53％、Ｃｕ0.30％、Ｆｅ0.24％を含
有するＡｌ−Ｓｉ−Ｍｇ系合金の圧延板を焼鈍し、この
焼鈍板（Ｏ材、厚さ1mm ）を試験材として、実施例１と
同様の方法で、研削、リン酸亜鉛処理および塗装を行
い、実施例１と同一の塩水噴霧による腐食試験を実施し
たところ、バフ研磨により仕上げ研削した試験材および
スクレーパー研削により仕上げ研削した試験材に発生し
た糸錆の長さは、研磨紙のみにより研削した試験材に比
べて著しく小さく、非研削材と同等以上の耐糸錆性を示
した。Example 2 A rolled plate of an Al-Si-Mg based alloy containing 0.75% Si, 0.53% Mg, 0.30% Cu and 0.24% Fe was annealed, and this annealed plate (O material, thickness 1 mm) as a test material, grinding, zinc phosphate treatment and coating were carried out in the same manner as in Example 1, and the same corrosion test by salt spray as in Example 1 was carried out. The length of thread rust generated in the test material and the test material finish-ground by scraper grinding was significantly smaller than that of the test material ground only with abrasive paper, and the thread rust resistance was equal to or higher than that of the non-ground material.
【００２６】[0026]
【発明の効果】以上のとおり、本発明によれば、成形加
工したのち表面欠陥部を研削し、リン酸亜鉛処理および
塗装した場合、研削部は非研削部と同等以上の耐糸錆性
を示すアルミニウム合金研削部の塗装前処理方法が提供
される。本発明の方法は、とくにＡｌ−Ｍｇ系合金およ
びＡｌ−Ｓｉ−Ｍｇ系合金において効果的であり、これ
らの合金板を自動車車体パネル用として適用する場合に
有効に使用することができる。As described above, according to the present invention, when the surface defect portion is ground after the molding process, and zinc phosphate treatment and coating are performed, the ground portion has a thread rust resistance equal to or higher than that of the non-ground portion. A method of pre-painting an aluminum alloy grind is shown. The method of the present invention is particularly effective for Al-Mg-based alloys and Al-Si-Mg-based alloys, and can be effectively used when these alloy plates are applied for automobile body panels.
【００２７】すなわち、上記アルミニウム合金材を自動
車車体パネルとして使用する場合、プレス加工などの成
形加工時後、自動車の組立ラインにおいて、成形により
生じた表面欠陥部を研削によって除去したのちリン酸亜
鉛処理を行う場合が多いが、このような場合、従来は研
削部における塗装後の耐食性、とくに耐糸錆性が著しく
劣化するという問題が生じたが、本発明によればこの問
題が回避される。That is, when the above aluminum alloy material is used as an automobile body panel, after a molding process such as a pressing process, a surface defect portion generated by the molding is removed by grinding and then a zinc phosphate treatment is performed in an automobile assembly line. In such a case, there is a problem that the corrosion resistance after coating in the grinding portion, particularly the thread rust resistance is significantly deteriorated, but this problem is avoided by the present invention.
【図１】Ａｌ−Ｍｇ系合金におけるＣｕ含有量とリン酸
亜鉛皮膜量との関係を示すグラフである。FIG. 1 is a graph showing the relationship between the Cu content and the zinc phosphate coating amount in an Al—Mg-based alloy.
【図２】Ａｌ−Ｍｇ系合金において、非研削材、研磨紙
による研削材のリン酸亜鉛皮膜生成量および糸錆の長さ
を示すグラフである。FIG. 2 is a graph showing the amount of zinc phosphate film formed and the length of thread rust in non-abrasive materials and abrasive materials made of abrasive paper in Al—Mg alloys.
【図３】Ａｌ−Ｍｇ系合金において、非研削材、各種研
削材のリン酸亜鉛皮膜生成量および糸錆の長さを示すグ
ラフである。FIG. 3 is a graph showing the amount of zinc phosphate film formed and the length of thread rust of non-abrasive materials and various abrasive materials in Al—Mg alloys.
【図４】Ａｌ−Ｍｇ系合金材を研磨紙のみで研削した場
合の表面形状を示す断面図である。FIG. 4 is a cross-sectional view showing a surface shape when an Al—Mg-based alloy material is ground only with abrasive paper.
【図５】Ａｌ−Ｍｇ系合金材をバフ研磨により仕上げ研
削した場合の表面形状を示す断面図である。FIG. 5 is a cross-sectional view showing a surface shape when an Al—Mg alloy material is finish-ground by buffing.
【図６】Ａｌ−Ｍｇ系合金材をスクレーパー研削により
仕上げ研削した場合の表面形状を示す断面図である。FIG. 6 is a cross-sectional view showing a surface shape when an Al—Mg alloy material is finish ground by scraper grinding.
Claims (4)
倍率が４００倍以下の光学顕微鏡で観察したとき多数の
割れ目状の凹部が存在しない滑らかな面に仕上げ研削し
たのち、リン酸亜鉛処理することを特徴とするアルミニ
ウム合金研削部の塗装前処理方法。1. A surface of a ground portion of an aluminum alloy material,
A pretreatment method for coating an aluminum alloy ground portion, which comprises performing a finish grinding on a smooth surface free from a large number of crack-shaped recesses when observed under an optical microscope with a magnification of 400 times or less, and then performing a zinc phosphate treatment.
ていることを特徴とする請求項１記載のアルミニウム合
金研削部の塗装前処理方法。2. The pretreatment method for coating an aluminum alloy ground portion according to claim 1, wherein the ground portion is finish-ground by buffing.
研削されていることを特徴とする請求項１記載のアルミ
ニウム合金研削部の塗装前処理方法。3. The pretreatment method for coating an aluminum alloy ground portion according to claim 1, wherein the ground portion is finish ground by scraper grinding.
またはＡｌ−Ｓｉ−Ｍｇ系合金であることを特徴とする
請求項１〜３記載のアルミニウム合金研削部の塗装前処
理方法。4. The pretreatment method for coating the aluminum alloy ground portion according to claim 1, wherein the aluminum alloy is an Al—Mg based alloy or an Al—Si—Mg based alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10792395A JPH08281208A (en) | 1995-04-07 | 1995-04-07 | Pretreatment for coating of ground part of aluminum alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10792395A JPH08281208A (en) | 1995-04-07 | 1995-04-07 | Pretreatment for coating of ground part of aluminum alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08281208A true JPH08281208A (en) | 1996-10-29 |
Family
ID=14471482
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10792395A Pending JPH08281208A (en) | 1995-04-07 | 1995-04-07 | Pretreatment for coating of ground part of aluminum alloy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08281208A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6265781B1 (en) | 1996-10-19 | 2001-07-24 | Micron Technology, Inc. | Methods and solutions for cleaning polished aluminum-containing layers, methods for making metallization structures, and the structures resulting from these methods |
| JP2002018696A (en) * | 2000-06-14 | 2002-01-22 | Alcoa Inc | Method for smoothing surface of aluminum or aluminum alloy used as aircraft part and such aircraft part |
| JP2002206175A (en) * | 2000-10-30 | 2002-07-26 | Nippon Steel Corp | Al-ALLOY SHEET WITH EXCELLENT PRESS FORMABILITY, AND ITS MANUFACTURING METHOD |
| US6635562B2 (en) | 1998-09-15 | 2003-10-21 | Micron Technology, Inc. | Methods and solutions for cleaning polished aluminum-containing layers |
| JP2007130316A (en) * | 2005-11-11 | 2007-05-31 | Nelson Precision Casting Co Ltd | Surface treatment method of golf club head |
| JP2010260116A (en) * | 2009-04-30 | 2010-11-18 | Mitsui Seiki Kogyo Co Ltd | Method of finishing solid-like member containing ceramics material by using scraper, and scraper therefor |
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-
1995
- 1995-04-07 JP JP10792395A patent/JPH08281208A/en active Pending
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6265781B1 (en) | 1996-10-19 | 2001-07-24 | Micron Technology, Inc. | Methods and solutions for cleaning polished aluminum-containing layers, methods for making metallization structures, and the structures resulting from these methods |
| US6635562B2 (en) | 1998-09-15 | 2003-10-21 | Micron Technology, Inc. | Methods and solutions for cleaning polished aluminum-containing layers |
| JP2002018696A (en) * | 2000-06-14 | 2002-01-22 | Alcoa Inc | Method for smoothing surface of aluminum or aluminum alloy used as aircraft part and such aircraft part |
| JP2002206175A (en) * | 2000-10-30 | 2002-07-26 | Nippon Steel Corp | Al-ALLOY SHEET WITH EXCELLENT PRESS FORMABILITY, AND ITS MANUFACTURING METHOD |
| JP4638619B2 (en) * | 2000-10-30 | 2011-02-23 | 新日本製鐵株式会社 | Al alloy plate excellent in press formability and manufacturing method thereof |
| JP2007130316A (en) * | 2005-11-11 | 2007-05-31 | Nelson Precision Casting Co Ltd | Surface treatment method of golf club head |
| JP2010260116A (en) * | 2009-04-30 | 2010-11-18 | Mitsui Seiki Kogyo Co Ltd | Method of finishing solid-like member containing ceramics material by using scraper, and scraper therefor |
| JP2012052173A (en) * | 2010-08-31 | 2012-03-15 | Jx Nippon Mining & Metals Corp | Indium target and method for production thereof |
| WO2012029355A1 (en) * | 2010-08-31 | 2012-03-08 | Jx日鉱日石金属株式会社 | Indium target and method for producing same |
| CN102652185A (en) * | 2010-08-31 | 2012-08-29 | Jx日矿日石金属株式会社 | Indium target and method for producing same |
| CN104480435A (en) * | 2010-08-31 | 2015-04-01 | Jx日矿日石金属株式会社 | Indium target and method for producing the same |
| US9490108B2 (en) | 2010-09-01 | 2016-11-08 | Jx Nippon Mining & Metals Corporation | Indium target and method for manufacturing same |
| US9139900B2 (en) | 2011-03-01 | 2015-09-22 | JX Nippon Mining Metals Corporation | Indium target and manufacturing method thereof |
| US9023487B2 (en) | 2011-09-21 | 2015-05-05 | Jx Nippon Mining & Metals Corporation | Laminated structure and method for producing the same |
| US9758860B2 (en) | 2012-01-05 | 2017-09-12 | Jx Nippon Mining & Metals Corporation | Indium sputtering target and method for manufacturing same |
| US9761421B2 (en) | 2012-08-22 | 2017-09-12 | Jx Nippon Mining & Metals Corporation | Indium cylindrical sputtering target and manufacturing method thereof |
| US9922807B2 (en) | 2013-07-08 | 2018-03-20 | Jx Nippon Mining & Metals Corporation | Sputtering target and method for production thereof |
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