JP2561397B2 - Electrolytic coloring method of aluminum or aluminum alloy - Google Patents
Electrolytic coloring method of aluminum or aluminum alloyInfo
- Publication number
- JP2561397B2 JP2561397B2 JP3138855A JP13885591A JP2561397B2 JP 2561397 B2 JP2561397 B2 JP 2561397B2 JP 3138855 A JP3138855 A JP 3138855A JP 13885591 A JP13885591 A JP 13885591A JP 2561397 B2 JP2561397 B2 JP 2561397B2
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- JP
- Japan
- Prior art keywords
- aluminum
- treatment
- electrolytic
- coloring
- colored
- 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.)
- Expired - Lifetime
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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、チタンまたはチタン合金を対極に用いて交
流電解処理を施すことを特徴とし、アルミニウム表面に
着色の濃淡のない安定したしかも均一かつ美麗な着色お
よび色調の変化に富んだ着色を簡単に施すことのできる
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, alternating-current electrolytic treatment is performed using titanium or titanium alloy as a counter electrode, and the aluminum surface is stable, uniform, and beautiful with no shade of coloring. The present invention relates to a method for electrolytically coloring aluminum which can easily perform coloring rich in coloring and color tone.
【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
り生産性を低下させる欠点がある。また、アルミニウム
の表面に色調の変化に富んだ着色を施すのに簡単な方法
は未だ見出されていないのが実情である。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 perform uniform and beautiful coloring, there is a drawback that it takes a lot of time and labor such as electrolytic treatment at low voltage for a long time and productivity is lowered. In addition, the fact is that no simple method has yet been found for coloring the surface of aluminum with a variety of color tones.
【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簡単な電解着色
方法によって、処理物の形状や大きさにかかわらず、着
色の濃淡のない安定したしかも均一でかつ美麗な着色お
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 provide an economical and simple electrolytic coloring method without lowering the productivity and to provide a stable and stable coloring regardless of the shape and size of the processed material. Another object of the present invention is to provide an aluminum having a colored film that is uniform and has a beautiful coloring and rich color change.
【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、チタンまた
はチタン合金を電極に用い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, titanium or
Found that the drawbacks of the conventional method can be solved by applying an alternating current electrolytic treatment using a titanium alloy for the electrode. 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、
チタンまたはチタン合金を対極として硫酸水溶液中で交
流電解処理することを特徴とするアルミニウムの電解着
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 in an electrolytic bath containing a metal salt, prior to the electrolytic coloring.
It is intended to provide an electrolytic coloring method for aluminum, which comprises subjecting titanium or a titanium alloy as a counter electrode to alternating current electrolytic treatment in an aqueous sulfuric acid solution.
【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、
本発明においで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、チタン又はチ
タン合金が用いられる。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, titanium or titanium alloy is used as the metal used as the counter electrode.
【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。このように、陽極酸化処理を施したアルミニウム
に、チタンまたはチタン合金を対極として硫酸水溶液中
で中間処理を施し、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。本発明においては、上述の中間処理の
時間を適宜選定し、しかる後に電解着色処理を施すと、
処理時間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。The intermediate treatment performed prior to the electrolytic coloring treatment may use an AC power source having an appropriate frequency or a power source having a waveform having the same effect as that of the electrolytic coloring treatment, and an aqueous sulfuric acid solution as an electrolytic solution. Is not particularly limited. 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
It should be 0.5 to 1.5 A / dm 2 , especially 0.5 to 1.0 A / dm 2 , and the electrolyte temperature should be selected in the range of 15 to 25 ° C. In this way, anodized aluminum is subjected to intermediate treatment in a sulfuric acid aqueous solution with titanium or a titanium alloy as a counter electrode, and then electrolytic coloring treatment is performed in an electrolytic bath containing a metal salt. Regardless of the shape or size of aluminum, it is possible to obtain aluminum that is stable, uniform, and beautifully colored without any difference in shade. In the present invention, the time of the above-mentioned intermediate treatment is appropriately selected, and then electrolytic coloring treatment is performed,
Depending on the processing time, it is possible to obtain aluminum colored in various desired shades.
【０００９】上記中間処理時間による色調の変化は、他
の条件が一定している場合には、例えば、３０秒間程度
処理した場合、後の電解着色処理で青紫色、６０秒間程
度処理したもので緑色、９０秒間程度処理したもので黄
緑色、そして１２０秒間程度処理したものでゴールド色
と、様々に再現性よく進行する。しかも、得られる着色
皮膜は、所望する色調に形成されると共に均一かつ安定
したものである。この中間処理条件と色調との関係を見
ると，他の条件を一定にした場合、概ね第１表のような
関係を見出すことができる。The change in color tone due to the above intermediate treatment time is caused by other treatments, such as a treatment for about 30 seconds, a treatment of about 30 seconds, and a subsequent electrolytic coloring treatment for treatment of bluish purple for about 60 seconds. It progresses with various reproducibility, such as green, yellow green after 90 seconds of treatment, and gold after 120 seconds of treatment. Moreover, the obtained colored film is formed in a desired color tone and is uniform and stable. Looking at the relationship between the intermediate processing condition and the color tone, when the other conditions are fixed, the relationship as shown in Table 1 can be generally found.
【００１０】[0010]
【表１】 [Table 1]
【００１１】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５〜３０
Ｖ、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
に用いたチタンまたはチタン合金を用いることもでき
る。In the method of the present invention, electrolytic coloring treatment is performed after the above 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, electrolysis voltage 5 to 30
V, preferably 10-15V, current density 0.3-1.5A /
dm 2 , preferably 0.5 to 1.0 A / dm 2 , and the electrolysis time may be set in the range of 30 to 180 seconds. As the counter electrode, carbon, tin, nickel, lead, aluminum, stainless steel or the like may be used, or titanium or titanium alloy used for the intermediate treatment may be used.
【００１２】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、また電極をチタンまたはチタン合金に取り替
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 as used 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 by using the same electrolytic bath, and then using an AC power source as the power source and replacing the electrode with titanium or a titanium alloy before performing the intermediate treatment.
【００１３】[0013]
【実施例】次に、本発明を実施例および比較例により更
に詳しく説明するが、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
−Ｔ5 材（巾７０ｍｍ×長さ１５０ｍｍ×厚さ２ｍｍ）
を、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。EXAMPLES Next, the present invention will be described in more 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, aluminum is JIS A 6063.
-T 5 material (width 70 mm x length 150 mm x thickness 2 mm)
The pre-treated product was subjected to degreasing, washing with water, etching, washing with water, neutralization, and washing with water in a conventional manner.
【００１４】実施例１ 長さ２００ｍｍ×巾２００ｍｍ×深さ２００ｍｍの電解
槽に、Ｈ2 ＳＯ4 １７８ｇ／リットル，溶解Ａｌイオン
6.５ｇ／リットルを含む電解液を仕込み、アルミニウム
板を陰極とし、処理すべきアルミニウム（処理面積1.８
ｄｍ2 ）を陽極として電流密度1.５Ａ／ｄｍ2 で、２０
分間陽極酸化処理を行った。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ミニウム
を、電圧４Ｖで、３０秒間中間処理（交流電解処理）を
行った。さらに、別の電解槽に、Ｈ2 ＳＯ4 ５０ｇ／リ
ットル，ＳｎＳＯ4 １０ｇ／リットルを含む電解着色液
を仕込み、液温２０℃, 電圧１５Ｖで、６０秒間電解着
色処理を行った。電解着色されたアルミニウムは青紫色
に着色され、安定した色調のものを得ることができた。Example 1 H 2 SO 4 178 g / liter and dissolved Al ions were placed in an electrolytic cell having a length of 200 mm, a width of 200 mm and a depth of 200 mm.
The electrolytic solution containing 6.5 g / liter was charged, the aluminum plate was used as the cathode, and the aluminum to be treated (treatment area 1.8
dm 2 ) as an anode and a current density of 1.5 A / dm 2 ,
Anodizing treatment was performed for a minute. Next, in the above electrolytic cell, anodized aminium was subjected to intermediate treatment (AC electrolysis treatment) at a voltage of 4 V for 30 seconds with titanium as a counter electrode. Further, another electrolytic bath was charged with an electrolytic coloring solution containing 50 g / l of H 2 SO 4 and 10 g / l of SnSO 4 , and electrolytic coloring treatment was carried out at a liquid temperature of 20 ° C. and a voltage of 15 V for 60 seconds. The electrolytically colored aluminum was colored violet and a stable color tone could be obtained.
【００１５】実施例２ 処理面積0.９ｄｍ2 のアルミニウムを用いた以外は、実
施例１と同様に中間処理および電解着色処理を行ったと
ころ、上記実施例１と同様に青紫色に着色されたアルミ
ニウムが得られた。Example 2 The same intermediate treatment and electrolytic coloring treatment as in Example 1 were carried out except that aluminum having a treated area of 0.9 dm 2 was used. Aluminum was obtained.
【００１６】実施例３中間処理時間を６０秒に変えた以
外は、実施例１と同様に実施し、緑色に着色されたアル
ミニウムを得ることができた。Example 3 The same procedure as in Example 1 was repeated except that the intermediate treatment time was changed to 60 seconds, whereby aluminum colored in green could be obtained.
【００１７】実施例４ 処理面積0.９ｄｍ2 のアルミニウムを用いた以外は、実
施例３と同様に中間処理および電解着色処理を行ったと
ころ、上記実施例３と同様に緑色に着色されたアルミニ
ウムが得られた。Example 4 The same intermediate treatment and electrolytic coloring treatment as in Example 3 were carried out except that aluminum having a treated area of 0.9 dm 2 was used. was gotten.
【００１８】実施例５ 処理面積1.８ｄｍ2 のアルミニウムを用い、また中間処
理時間を９０秒に変えた以外は、実施例１と同様に実施
し、黄緑色に着色されたアルミニウムを得ることができ
た。Example 5 The same procedure as in Example 1 was carried out except that aluminum having a treated area of 1.8 dm 2 was used and the intermediate treatment time was changed to 90 seconds, whereby aluminum colored yellow green was obtained. did it.
【００１９】実施例６ 中間処理時間を１２０秒に変えた以外は、実施例５と同
様に実施し、ゴールド色に着色されたアルミニウムを得
ることができた。Example 6 The same procedure as in Example 5 was carried out except that the intermediate treatment time was changed to 120 seconds, whereby gold-colored aluminum could be obtained.
【００２０】実施例７ 中間処理を電圧５Ｖで３０秒行った以外は、実施例５と
同様に実施し、青色に着色されたアルミニウムを得るこ
とができた。Example 7 Blue-colored aluminum could be obtained in the same manner as in Example 5, except that the intermediate treatment was carried out at a voltage of 5 V for 30 seconds.
【００２１】実施例８ 中間処理時間を６０秒に変えた以外は、実施例７と同様
に実施し、黄緑色に着色されたアルミニウムを得ること
ができた。Example 8 The procedure of Example 7 was repeated except that the intermediate treatment time was changed to 60 seconds, whereby yellow-green colored aluminum could be obtained.
【００２２】実施例９ 中間処理時間を９０秒に変えた以外は、実施例７と同様
に実施し、ゴールド色に着色されたアルミニウムを得る
ことができた。Example 9 The procedure of Example 7 was repeated except that the intermediate treatment time was changed to 90 seconds, whereby gold-colored aluminum could be obtained.
【００２３】比較例１ 陽極酸化処理の電流密度を1.５Ａ／ｄｍ2 とし、また中
間処理において対極としてチタンの代わりにアルミニウ
ムを用いたこと以外は、実施例１と同様に実施し、青紫
色に着色されたアルミニウムを得た。Comparative Example 1 The same procedure as in Example 1 was carried out except that the current density of the anodizing treatment was set to 1.5 A / dm 2 and aluminum was used instead of titanium as the counter electrode in the intermediate treatment, and a blue-violet color was obtained. To obtain aluminum colored.
【００２４】比較例２ 処理面積0.９ｄｍ2 のアルミニウムを用いた以外は、比
較例１と同様に中間処理および電解着色処理を行った
が、色調が安定しなかったのみならず、青紫色の着色は
得られず、青緑色に着色されたアルミニウムが得られ
た。Comparative Example 2 An intermediate treatment and an electrolytic coloring treatment were performed in the same manner as in Comparative Example 1 except that aluminum having a treated area of 0.9 dm 2 was used. However, not only the color tone was not stable, but also a blue-violet color was obtained. No coloring was obtained, but blue-green colored aluminum was obtained.
【００２５】比較例３ 陽極酸化処理の電流密度を1.５Ａ／ｄｍ2 とし、また中
間処理において対極としてチタンの代わりにアルミニウ
ムを用いたこと以外は、実施例３と同様に実施し、緑色
に着色されたアルミニウムを得た。Comparative Example 3 The procedure of Example 3 was repeated, except that the current density of the anodizing treatment was set to 1.5 A / dm 2, and aluminum was used instead of titanium as the counter electrode in the intermediate treatment, and a green color was obtained. A colored aluminum is obtained.
【００２６】比較例４ 処理面積0.９ｄｍ2 のアルミニウムを用いた以外は、比
較例３と同様に中間処理および電解着色処理を行った
が、色調が安定しなかったのみならず、緑色の着色は得
られず、ゴールド色に着色されたアルミニウムが得られ
た。Comparative Example 4 An intermediate treatment and an electrolytic coloring treatment were carried out in the same manner as in Comparative Example 3 except that aluminum having a treated area of 0.9 dm 2 was used, but not only the color tone was not stable, but also a green coloring was obtained. Was not obtained, and gold-colored aluminum was obtained.
【００２７】[0027]
【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 (1)
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、チタンまたはチタン合金を対極として硫酸水溶液中
で交流電解処理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, wherein an aqueous sulfuric acid solution using titanium or a titanium alloy as a counter electrode prior to the electrolytic coloring treatment. A method for electrolytically coloring aluminum or an aluminum alloy, which comprises subjecting it to alternating current electrolytic treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3138855A JP2561397B2 (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 |
|---|---|---|---|
| JP3138855A JP2561397B2 (en) | 1991-06-11 | 1991-06-11 | Electrolytic coloring method of aluminum or aluminum alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04362196A JPH04362196A (en) | 1992-12-15 |
| JP2561397B2 true JP2561397B2 (en) | 1996-12-04 |
Family
ID=15231729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3138855A Expired - Lifetime JP2561397B2 (en) | 1991-06-11 | 1991-06-11 | Electrolytic coloring method of aluminum or aluminum alloy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2561397B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111155158A (en) * | 2020-01-18 | 2020-05-15 | 厦门市求华体育用品有限公司 | Racket appearance anodizing coloring processing technology |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5140862A (en) * | 1974-10-04 | 1976-04-06 | Hitachi Ltd | FUJUNBUTSUOFUKUMUSHIRIKONSANKABUTSUOKAKUSANGENTOSURU KAKUSANHO |
| JPS5511757A (en) * | 1978-07-12 | 1980-01-26 | Hitachi Ltd | Pendulum-type travelling shearer |
| JPS609591B2 (en) * | 1979-08-29 | 1985-03-11 | 株式会社村田製作所 | Method for preventing oxidation of heat-treated copper coatings |
| JPS599196A (en) * | 1982-07-09 | 1984-01-18 | Nippon Kentetsu Co Ltd | Electrolytic pigmenting method of aluminum |
-
1991
- 1991-06-11 JP JP3138855A patent/JP2561397B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04362196A (en) | 1992-12-15 |
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