JPS6289878A - Aluminum alloy plate having superior corrosion resistance and treatment of its surface - Google Patents
Aluminum alloy plate having superior corrosion resistance and treatment of its surfaceInfo
- Publication number
- JPS6289878A JPS6289878A JP21632285A JP21632285A JPS6289878A JP S6289878 A JPS6289878 A JP S6289878A JP 21632285 A JP21632285 A JP 21632285A JP 21632285 A JP21632285 A JP 21632285A JP S6289878 A JPS6289878 A JP S6289878A
- Authority
- JP
- Japan
- Prior art keywords
- alloy plate
- corrosion resistance
- aluminum alloy
- treatment
- excellent corrosion
- 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
【発明の詳細な説明】
１産業上の利用分野１
本発明は耐蝕性に優れたアルミニウム合金板（アルミニ
ウム板を含む。）およびその表面処理方法に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION 1. Industrial Application Field 1 The present invention relates to an aluminum alloy plate (including an aluminum plate) having excellent corrosion resistance and a surface treatment method thereof.
［従来技術１
一般的に、アルミニウムおよびアルミニウム合金は、表
面１こ保護力の強い酸化皮膜を形成し、実用上優れた耐
蝕性を有しているので、日用品や建材等に使用されてい
る。[Prior Art 1] Aluminum and aluminum alloys are generally used for daily necessities, building materials, etc. because they form a highly protective oxide film on the surface and have excellent corrosion resistance in practical use.
しカルなが呟アルミニウムおよびアルミニウム合金は高
温の水にさらされると黒く変色したり、また、高温の水
蒸気にさらされると白く変色することがあり、そのため
、このような黒色変化および白色化を防止するために、
アルミニウムお上りアルミニウム合金に種々の表面処理
が行なわれている。Aluminum and aluminum alloys can turn black when exposed to high-temperature water, or turn white when exposed to high-temperature steam, so we recommend preventing such blackening and whitening. In order to
Various surface treatments have been applied to aluminum alloys.
その一つに、アルミニウムおよびアルミニウム合金の表
面に燐酸クロメート処理を行なう方法があるが、この燐
酸クロメート処理を行なっても、高温水或いは高温水蒸
気にさらされると、このような処理を行なわないアルミ
ニウムおよびアルミニウム合金と同様に表面に黒色変化
、また、白色化が発生して、実用上問題となる。One method is to perform phosphoric acid chromate treatment on the surface of aluminum and aluminum alloys, but even if this phosphoric acid chromate treatment is performed, aluminum and aluminum alloys that have not undergone such treatment will deteriorate when exposed to high-temperature water or high-temperature steam. Similar to aluminum alloys, blackening and whitening occur on the surface, which poses a practical problem.
［発明か解決しようとする問題点１
本発明はこのような現状に鑑みなされたものであり、特
に、耐蝕性に優れたアルミニウム合金板の表面処理方法
を提供するものである。[Problem to be Solved by the Invention 1] The present invention has been made in view of the current situation, and particularly provides a method for surface treatment of an aluminum alloy plate with excellent corrosion resistance.
１問題点を解決するための手段１
本発明に係る耐蝕性に優れたアルミニウム合金板および
その表面処理方法は、
（１） ピントが最大径０．１μ未満であり、かつ、ク
ロム付着量が５ ｍ ８／ ｌ＋１ ”以上である燐酸
クロメート皮膜が設けられていることを特徴とする耐蝕
性に優れたアルミニウム合金板を＠１の発明とし、（２
） アルミニウム合金板の表面処理として燐酸クロメー
ト処理を行なう際に、クロム酸に対する弗酸の重量濃度
比を０．０１−０．５の処理浴を使用し、０．１μ以上
の径のビットが生成しないように処理することを特徴と
する耐蝕性に優れたアルミニウム合金板の表面処理方法
を第２の発明とする２つの発明よりなるものである。1 Means for Solving Problem 1 The aluminum alloy plate with excellent corrosion resistance and the surface treatment method thereof according to the present invention are as follows: (1) The maximum diameter of the pinto is less than 0.1μ, and the amount of chromium deposited is 5. The invention of @1 is an aluminum alloy plate with excellent corrosion resistance characterized by being provided with a phosphoric acid chromate film having a thickness of m 8 / l + 1 ” or more,
) When performing phosphoric acid chromate treatment as a surface treatment for aluminum alloy plates, a treatment bath with a weight concentration ratio of hydrofluoric acid to chromic acid of 0.01-0.5 is used to produce bits with a diameter of 0.1μ or more. This invention consists of two inventions, the second invention being a method for surface treatment of an aluminum alloy plate with excellent corrosion resistance, which is characterized in that the surface treatment method is performed to prevent corrosion.
本発明に係る耐蝕性に優れたアルミニウム合金板お上び
そのの表面処理方法について以下詳細に説明する。The aluminum alloy plate with excellent corrosion resistance and the surface treatment method thereof according to the present invention will be described in detail below.
先ず、本発明に係る耐蝕性に優れたアルミニウム合金板
およびそのの表面処理力法において、クロム酸に対する
弗酸の重量濃度比を０．Ｏ１〜０．５とすることｉ二つ
いて説明する。First, in the aluminum alloy plate with excellent corrosion resistance and its surface treatment method according to the present invention, the weight concentration ratio of hydrofluoric acid to chromic acid is set to 0. The explanation will be based on two values i, which are O1 to 0.5.
一般にｌＩＦは燐酸クロメート処理における皮膜の生成
を促進するものであるが、本発明者は燐酸クロメート処
理材の耐蝕性改善について鋭意研究した結果、ＨＦは皮
膜に０．１〜１．０μの微小なビットを生成させる作用
かあり、これが耐蝕性を低下させることを見出した。In general, lIF promotes the formation of a film during phosphoric acid chromate treatment, but as a result of intensive research into improving the corrosion resistance of phosphoric acid chromate treated materials, the present inventor found that HF causes minute particles of 0.1 to 1.0μ in the film. It has been found that this has the effect of generating bits, which reduces corrosion resistance.
そして、このような微小なビットを生成させないために
は、クロム酸に対する弗酸の重量濃度比を０．０１〜０
．５とすることが必要であり、この比が０．０１未満で
は皮膜の生成効率が不充分であって所望の効果が得られ
ず、また、０．５を越えると０．１μを越える大きなビ
ットが生成して耐蝕性が極端に低下するようになる。In order to prevent the generation of such minute bits, the weight concentration ratio of hydrofluoric acid to chromic acid should be set at 0.01 to 0.
．． If this ratio is less than 0.01, the film generation efficiency will be insufficient and the desired effect will not be obtained, and if it exceeds 0.5, large bits exceeding 0.1 μ will be produced. is formed, resulting in an extremely poor corrosion resistance.
そして、本発明者の知見によると耐蝕性を向上させるた
めには、少なくとも最大径０．１μの微小ビットを生成
させないようにすることが必要であす、二の０，１μよ
り大きい径のピントが生成すると耐蝕性か劣化するので
ある。According to the findings of the present inventor, in order to improve the corrosion resistance, it is necessary to prevent the generation of minute bits with a maximum diameter of at least 0.1μ; When it forms, its corrosion resistance deteriorates.
［実施例１
本発明に係る耐蝕性に優れたアルミニウム合金板および
その表面処理方法の実施例を説明する。[Example 1] An example of an aluminum alloy plate with excellent corrosion resistance and a surface treatment method thereof according to the present invention will be described.
実施例
Ｍ８含有量が４．５すＬ％のアルミニウム合金板の厚さ
０．３２＋ｎｍのものを使用し、アルカリ性エツチング
１６（０，２Ｎ ＮａＯＨ？Ｏ’ＣＸ−を秒）でエツ
チングを行なってから、１１表に示す燐酸クロメート処
理浴により処理を行なった。Example: Using an aluminum alloy plate with a thickness of 0.32+nm with an M8 content of 4.5L%, etching was performed with alkaline etching 16 (0.2N NaOH?O'CX- for seconds). The treatment was carried out using a phosphoric acid chromate treatment bath shown in Table 11.
耐蝕性は塩水噴霧試験（Ｊ Ｉ Ｓ Ｚ−２３７１）
により、耐白錆を調査しｒこ。Corrosion resistance is determined by salt spray test (JIS Z-2371)
We investigated white rust resistance.
第１表から、本発明に係る耐蝕性に優れたアルミニウム
合金板の表面処理方法により製造された耐蝕性アルミニ
ウム合金板は、比較例に比して耐蝕性が格段に優れてい
ることは明らかである。From Table 1, it is clear that the corrosion-resistant aluminum alloy plate produced by the corrosion-resistant aluminum alloy plate surface treatment method according to the present invention has much better corrosion resistance than the comparative example. be.
また、第１図（ａ）は本発明に係る耐蝕性に優れたアル
ミニウム合金板の表面処理方法の実施例３により製造さ
れた耐蝕性アルミニウム合金板の表面組織を示す顕微鏡
写真であり、第１図（ｂ）は比較例１のアルミニウム合
金板の表面組織を示す顕微鏡写真であり、第１図（ａ）
に示す表面組織が緻密であることがわかる。Moreover, FIG. 1(a) is a micrograph showing the surface structure of a corrosion-resistant aluminum alloy plate manufactured by Example 3 of the surface treatment method for an aluminum alloy plate with excellent corrosion resistance according to the present invention. Figure (b) is a micrograph showing the surface structure of the aluminum alloy plate of Comparative Example 1, and Figure 1 (a)
It can be seen that the surface structure shown in is dense.
［発明の効果１
以上説明したように、本発明に係る耐蝕性に優れたアル
ミニウム合金板およびその表面処理方法は上記の構成を
有しているものであるから、アルミニウム合金板は耐蝕
性においてを極めて優れており、日用品および建材等に
広く使用することができるという効果を有するものであ
る。[Effect of the invention 1 As explained above, since the aluminum alloy plate with excellent corrosion resistance and the surface treatment method thereof according to the present invention have the above configuration, the aluminum alloy plate has excellent corrosion resistance. It is extremely excellent and has the effect that it can be widely used in daily necessities, building materials, etc.
第１図（ａ）および′：５１図（ｂ）は本発明に係る耐
蝕性に優れたアルミニウム合金板の表面処理方法の実施
例１により得られたアルミニウム合金板の表面組織を示
す顕微鏡写真および比較例１のアルミニウム合金板の表
面組織を示す顕微鏡写真である。
才１ 図Figures 1(a) and 51(b) are micrographs showing the surface structure of an aluminum alloy plate obtained in Example 1 of the method for surface treatment of an aluminum alloy plate with excellent corrosion resistance according to the present invention; 3 is a micrograph showing the surface structure of an aluminum alloy plate of Comparative Example 1. 1 figure
Claims (2)
ム付着量が５ｍｇ／ｍ＾２以上である燐酸クロメート皮
膜が設けられていることを特徴とする耐蝕性に優れたア
ルミニウム合金板。(1) An aluminum alloy plate with excellent corrosion resistance, characterized in that the pits have a maximum diameter of less than 0.1μ and are provided with a phosphoric acid chromate film having a chromium adhesion amount of 5 mg/m^2 or more.
ート処理を行なう際に、クロム酸に対する弗酸の重量濃
度比を０．０１〜０．５の処理浴を使用し、０．１μ以
上の径のピットが生成しないように処理することをを特
徴とする耐蝕性に優れたアルミニウム合金板の表面処理
方法。(2) When performing phosphoric acid chromate treatment as a surface treatment for aluminum alloy plates, a treatment bath with a weight concentration ratio of hydrofluoric acid to chromic acid of 0.01 to 0.5 is used, and pits with a diameter of 0.1 μ or more are used. A method for surface treatment of an aluminum alloy plate with excellent corrosion resistance, characterized by treating the surface so as to prevent the formation of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21632285A JPS6289878A (en) | 1985-09-30 | 1985-09-30 | Aluminum alloy plate having superior corrosion resistance and treatment of its surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21632285A JPS6289878A (en) | 1985-09-30 | 1985-09-30 | Aluminum alloy plate having superior corrosion resistance and treatment of its surface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6289878A true JPS6289878A (en) | 1987-04-24 |
Family
ID=16686709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21632285A Pending JPS6289878A (en) | 1985-09-30 | 1985-09-30 | Aluminum alloy plate having superior corrosion resistance and treatment of its surface |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6289878A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01230787A (en) * | 1988-03-09 | 1989-09-14 | Kobe Steel Ltd | Production of aluminum alloy sheet for can cover having superior paint film adhesion |
| US4916365A (en) * | 1987-08-31 | 1990-04-10 | Anritsu Corporation | Color CRT displaying correction circuit |
| CN108166011A (en) * | 2017-12-29 | 2018-06-15 | 佛山市三水雄鹰铝表面技术创新中心有限公司 | A kind of Aluminum subtract slag oil removing and chromaking medicament it is compatible and subtract dirty spray system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5431043A (en) * | 1977-08-13 | 1979-03-07 | Nippon Paint Co Ltd | Surface treating method for aluminum, zinc and their alloy |
-
1985
- 1985-09-30 JP JP21632285A patent/JPS6289878A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5431043A (en) * | 1977-08-13 | 1979-03-07 | Nippon Paint Co Ltd | Surface treating method for aluminum, zinc and their alloy |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4916365A (en) * | 1987-08-31 | 1990-04-10 | Anritsu Corporation | Color CRT displaying correction circuit |
| JPH01230787A (en) * | 1988-03-09 | 1989-09-14 | Kobe Steel Ltd | Production of aluminum alloy sheet for can cover having superior paint film adhesion |
| CN108166011A (en) * | 2017-12-29 | 2018-06-15 | 佛山市三水雄鹰铝表面技术创新中心有限公司 | A kind of Aluminum subtract slag oil removing and chromaking medicament it is compatible and subtract dirty spray system |
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