JPH03122300A - Surface treatment of aluminum alloy - Google Patents
Surface treatment of aluminum alloyInfo
- Publication number
- JPH03122300A JPH03122300A JP26026989A JP26026989A JPH03122300A JP H03122300 A JPH03122300 A JP H03122300A JP 26026989 A JP26026989 A JP 26026989A JP 26026989 A JP26026989 A JP 26026989A JP H03122300 A JPH03122300 A JP H03122300A
- Authority
- JP
- Japan
- Prior art keywords
- chromate
- alloy
- alumite
- aluminum alloy
- mol
- 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.)
- Granted
Links
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 18
- 238000004381 surface treatment Methods 0.000 title claims abstract description 7
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 9
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000011148 porous material Substances 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 16
- PMJNEQWWZRSFCE-UHFFFAOYSA-N 3-ethoxy-3-oxo-2-(thiophen-2-ylmethyl)propanoic acid Chemical compound CCOC(=O)C(C(O)=O)CC1=CC=CS1 PMJNEQWWZRSFCE-UHFFFAOYSA-N 0.000 claims description 6
- 229910001430 chromium ion Inorganic materials 0.000 claims description 4
- 239000007864 aqueous solution Substances 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- 230000003647 oxidation Effects 0.000 claims description 2
- 238000007254 oxidation reaction Methods 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 abstract description 10
- 230000007797 corrosion Effects 0.000 abstract description 10
- 239000011651 chromium Substances 0.000 abstract description 6
- 239000011248 coating agent Substances 0.000 abstract description 6
- 238000000576 coating method Methods 0.000 abstract description 6
- WYYQVWLEPYFFLP-UHFFFAOYSA-K chromium(3+);triacetate Chemical compound [Cr+3].CC([O-])=O.CC([O-])=O.CC([O-])=O WYYQVWLEPYFFLP-UHFFFAOYSA-K 0.000 abstract description 4
- 229910052802 copper Inorganic materials 0.000 abstract description 2
- 238000005562 fading Methods 0.000 abstract description 2
- 229910052742 iron Inorganic materials 0.000 abstract description 2
- 229910052748 manganese Inorganic materials 0.000 abstract description 2
- 230000007935 neutral effect Effects 0.000 abstract description 2
- 229910045601 alloy Inorganic materials 0.000 abstract 2
- 239000000956 alloy Substances 0.000 abstract 2
- 238000007654 immersion Methods 0.000 abstract 1
- 150000002500 ions Chemical class 0.000 abstract 1
- 230000001590 oxidative effect Effects 0.000 abstract 1
- 229910052710 silicon Inorganic materials 0.000 abstract 1
- 229910052725 zinc Inorganic materials 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 10
- 238000002845 discoloration Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 239000000975 dye Substances 0.000 description 3
- QLOKJRIVRGCVIM-UHFFFAOYSA-N 1-[(4-methylsulfanylphenyl)methyl]piperazine Chemical compound C1=CC(SC)=CC=C1CN1CCNCC1 QLOKJRIVRGCVIM-UHFFFAOYSA-N 0.000 description 2
- 238000007743 anodising Methods 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 238000004040 coloring Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- PXLIDIMHPNPGMH-UHFFFAOYSA-N sodium chromate Chemical compound [Na+].[Na+].[O-][Cr]([O-])(=O)=O PXLIDIMHPNPGMH-UHFFFAOYSA-N 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910021555 Chromium Chloride Inorganic materials 0.000 description 1
- 230000002730 additional effect Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000010407 anodic oxide Substances 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- QSWDMMVNRMROPK-UHFFFAOYSA-K chromium(3+) trichloride Chemical compound [Cl-].[Cl-].[Cl-].[Cr+3] QSWDMMVNRMROPK-UHFFFAOYSA-K 0.000 description 1
- UBFMILMLANTYEU-UHFFFAOYSA-H chromium(3+);oxalate Chemical compound [Cr+3].[Cr+3].[O-]C(=O)C([O-])=O.[O-]C(=O)C([O-])=O.[O-]C(=O)C([O-])=O UBFMILMLANTYEU-UHFFFAOYSA-H 0.000 description 1
- QOWZHEWZFLTYQP-UHFFFAOYSA-K chromium(3+);triformate Chemical compound [Cr+3].[O-]C=O.[O-]C=O.[O-]C=O QOWZHEWZFLTYQP-UHFFFAOYSA-K 0.000 description 1
- GRWVQDDAKZFPFI-UHFFFAOYSA-H chromium(III) sulfate Chemical compound [Cr+3].[Cr+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O GRWVQDDAKZFPFI-UHFFFAOYSA-H 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- CMMUKUYEPRGBFB-UHFFFAOYSA-L dichromic acid Chemical compound O[Cr](=O)(=O)O[Cr](O)(=O)=O CMMUKUYEPRGBFB-UHFFFAOYSA-L 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 235000011149 sulphuric acid Nutrition 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/18—After-treatment, e.g. pore-sealing
- C25D11/20—Electrolytic after-treatment
- C25D11/22—Electrolytic after-treatment for colouring layers
Abstract
Description
【発明の詳細な説明】
［発明の利用分野１
本発明は、アルミニウム合金の表面に美麗なアルマイト
被膜を設ける新規の表面処理方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention 1] The present invention relates to a novel surface treatment method for forming a beautiful alumite coating on the surface of an aluminum alloy.
［従来技術１
アルミニウム合金の表面処理法には、ブロンズ色乃至褐
色をもたらす電解着色法並びに黄色をもたらす重クロム
酸封孔処理法が公知である。[Prior Art 1] Known methods for surface treatment of aluminum alloys include an electrolytic coloring method that produces a bronze or brown color, and a dichromic acid sealing method that produces a yellow color.
更に、アルマイト被膜を有機染料で封孔処理して所望の
色に着色する方法がある。Furthermore, there is a method of sealing the alumite film with an organic dye to give it a desired color.
しかしながら、有機染料で着色したものでは耐光性が悪
く、日光に曝されると、短期間で褪色や変色が起こる欠
点を有している。However, those colored with organic dyes have poor light resistance and have the disadvantage of fading or discoloration in a short period of time when exposed to sunlight.
［発明が解決しようとする課題１
従って、本発明の課題は、アルミニウム合金の表面に、
耐食性および耐光性をもたらす無機物によって特徴ある
美麗な着色をもたらす表面処理法を見出すことにある。[Problem to be Solved by the Invention 1 Therefore, the problem to be solved by the present invention is to:
The objective is to find a surface treatment method that provides characteristic and beautiful coloration using inorganic substances that provide corrosion resistance and light resistance.
［発明の構成１
本発明者は、鋭意研究を重た結果、か−る課題が、アル
ミニウム合金に硫酸陽極酸化処理を行ってアルマイト被
膜を形成した後に、０．２〜０．６ ｍｏｌ／ｌ２のク
ロム酸アンモニウムおよび０．０１〜０．０３ａｉｏｆ
／ ｌの三価クロムイオンを含む水溶液に８０〜１００
°Ｃにて浸漬して、アルマイト被膜の孔の中にクロメー
トを生成させることにより、アルマイトとクロメートの
複合被膜を形成させることを特徴とするアルミニウム合
金の表面処理方法によって耐食性および耐光性のある美
麗な黄緑色が得られ、解決し得ることを見出した。[Structure 1 of the Invention] As a result of extensive research, the present inventor has found that this problem has been solved by performing sulfuric acid anodic oxidation treatment on an aluminum alloy to form an alumite film. of ammonium chromate and 0.01-0.03 aiof
/l of trivalent chromium ions in an aqueous solution containing 80-100
The aluminum alloy surface treatment method is characterized by forming a composite film of alumite and chromate by immersing it at °C to generate chromate in the pores of the alumite film. We have found that a yellow-green color can be obtained and that this problem can be solved.
この色は、変色し難いという優れた性質も有している。This color also has the excellent property of being resistant to discoloration.
本発明で処理されるアルミニウム合金は、Ｓｔ。The aluminum alloy processed in the present invention is St.
Ｆｅ、 Ｃｕ、 Ｍｎ、、Ｚｎおよび場合によってはＭ
ｇ、 Ｃｒ。Fe, Cu, Mn,, Zn and sometimes M
g, Cr.
Ｔｉ、 Ｚｒ、 Ｖを微量に含有する各種アルミニウム
合金である。アルミニウム合金の表面は滑らかであって
もまたは粗面化されていてもよい。粗面化されたアルミ
ニウム合金に本発明の方法に従って表面処理を施した場
合には、輝きのある金色に近い黄緑色かえられる。滑ら
かな表面に表面処理した場合には、深みのある黄緑色が
得られる。またアルミニウム素材を公知の方法により電
解研磨または化学研磨を施してから、本発明の処理方法
を行うことによっていっそう美麗な外観を得ることがで
きる。本発明の方法で表面処理されるアルミニウム合金
は、種々の成形体の状態のものである。These are various aluminum alloys containing trace amounts of Ti, Zr, and V. The surface of the aluminum alloy may be smooth or roughened. When a roughened aluminum alloy is surface-treated according to the method of the present invention, it changes to a bright yellow-green color close to gold. When the surface is treated to be smooth, a deep yellow-green color can be obtained. Moreover, an even more beautiful appearance can be obtained by electrolytically polishing or chemically polishing an aluminum material by a known method and then performing the treatment method of the present invention. The aluminum alloys surface-treated by the method of the present invention are in the form of various compacts.
本発明の方法で使用するクロム酸アンモニウムは、０．
２ ｍｏｌ＃！以上〜０．６ ｍｏｌ＃！の濃度で使用
するのが有利である。この濃度が０．２ ｍｏｌ／ｆｆ
ｉより低い場合には、黄緑色が薄く成り耐食性が低下し
てしまう。０．６ ｍｏｌ／ｊ！より高い濃度でも所望
の効果が達成されるが、それ以上の付加的効果はない。The ammonium chromate used in the method of the present invention is 0.
2 mol#! More than ~0.6 mol#! Advantageously, it is used at a concentration of . This concentration is 0.2 mol/ff
If it is lower than i, the yellow-green color becomes pale and the corrosion resistance deteriorates. 0.6 mol/j! Higher concentrations also achieve the desired effect, but there is no additional effect beyond that.
クロム酸アンモニウムの代わりに、クロム酸ナトリウム
、クロム酸カリウム用いた場合、クロム酸ナトリウムで
は帯赤黄色〜黄色の着色が得られ、クロム酸カリウム等
でも種々の色が得られるが、これらの着色は決して美麗
なものではなく且つ他の性質においても、本発明に従っ
てクロム酸アンモニウムを用いた場合の如き優れた効果
を達成することができない。When sodium chromate or potassium chromate is used instead of ammonium chromate, reddish-yellow to yellow coloring can be obtained with sodium chromate, and various colors can be obtained with potassium chromate, etc., but these colors are It is by no means beautiful and in other respects it is not possible to achieve the excellent effects that can be achieved using ammonium chromate according to the invention.
クロメートを形成する為の水性浴中に存在させる三価の
クロムイオン（Ｃｒ＋３）は、有機−または無機の三価
のクロムを持つ化合物、例えば硫酸クロム、塩化クロム
、蟻酸クロム、酢酸クロム、蓚酸クロム等を水性浴中に
溶解することによって得られるＣｒ＋３である。酢酸ク
ロムを用いた場合が特に有利であることが実証されてい
る。The trivalent chromium ion (Cr+3) present in the aqueous bath to form chromate may be an organic or inorganic compound containing trivalent chromium, such as chromium sulfate, chromium chloride, chromium formate, chromium acetate, or chromium oxalate. Cr+3 obtained by dissolving Cr+3 in an aqueous bath. The use of chromium acetate has proven particularly advantageous.
クロメートを形成する際に、水性浴を８０〜１００°Ｃ
１特に９０〜１００℃の温度に澗整するのが有利である
。その際の水性浴のｐＨ値は、中性域、殊に６〜８、特
に６．８〜７．５であるのが有利である。When forming the chromate, the aqueous bath is heated to 80-100°C.
1. It is particularly advantageous to adjust the temperature to 90 DEG to 100 DEG C. The pH value of the aqueous bath in this case is advantageously in the neutral range, in particular from 6 to 8, in particular from 6.8 to 7.5.
アルミニウム合金にアルマイトを形成させる陽極酸化処
理は、従来公知の通例の方法で実施することができる（
例えばＪＩＳ Ｈ９５００参照）。Anodizing treatment to form alumite on an aluminum alloy can be carried out by a conventionally known common method (
For example, see JIS H9500).
本発明の方法で達成される上述の効果は、アルマイト被
膜の孔にクロメートが生成してアルマイト被膜とクロメ
ート被膜との複合被膜が形成されることによって達成さ
れる。The above-mentioned effects achieved by the method of the present invention are achieved by the formation of chromate in the pores of the alumite film to form a composite film of the alumite film and the chromate film.
本発明の方法で表面処理された製品は、建材としてだけ
でなく、その美麗さの為に審美性が問題とされる物品、
例えば自動車のフォイール、自転車の車体フレーム、家
庭用電気製品のケーシング、時計のボディー等並びに装
飾的製品、例えば花瓶、１燈の傘、建具等積々の用途に
用いることができる。Products surface-treated by the method of the present invention can be used not only as building materials, but also for products where aesthetics are an issue due to their beauty.
For example, it can be used in numerous applications such as automobile foils, bicycle body frames, casings for household appliances, watch bodies, etc., as well as decorative products such as vases, one-light umbrellas, and fittings.
本発明を以下の実施例によって更に詳細に説明する。The present invention will be explained in more detail by the following examples.
（実施例１
尖血且」
アルミニウム合金６０６３の試験片にＪＩＳ １１９５
００の作業標準に従って、陽極酸化被膜処理を行った。(Example 1) JIS 1195 on a test piece of aluminum alloy 6063
The anodic oxide coating treatment was performed according to the 00 work standard.
即ち、１５χ濃度のＨ２ＳＯ４浴で、浴温２０°Ｃ１浴
電圧１６ Ｖにて３０分間の電解を行なう。形成された
アルマイト被膜を持つ試験片を、０．５ ｍ。That is, electrolysis is carried out for 30 minutes in a H2SO4 bath with a concentration of 15x at a bath temperature of 20 DEG C. and a bath voltage of 16 V. The test piece with the formed alumite coating was placed at a distance of 0.5 m.
１／ｌのクロム酸アンモニウムおよび０．０２ ｍｏｌ
（三価クロムイオンに換算）／ｉの酢酸クロムを含む水
溶液中に９０°Ｃで１０分間浸漬する。美麗な黄緑色の
被膜が得えられる。1/l ammonium chromate and 0.02 mol
Immerse it in an aqueous solution containing chromium acetate (in terms of trivalent chromium ion)/i at 90°C for 10 minutes. A beautiful yellow-green film is obtained.
この試験片は塩水噴霧試験２０００時間でも腐食も変色
も認められず、優れた耐食性および耐変色性を示した。This test piece exhibited excellent corrosion resistance and discoloration resistance, with no corrosion or discoloration observed even after 2000 hours of salt spray testing.
また、上記のようにして得た別の試験片を直射日光の下
で３００日間、屋外暴露試験を実施したが、腐食も変色
も認められず、優れた耐食性および耐光性を示した。Further, another test piece obtained as described above was subjected to an outdoor exposure test under direct sunlight for 300 days, but neither corrosion nor discoloration was observed, indicating excellent corrosion resistance and light resistance.
止較炭
実施例１と同様のアルミニウム合金試験片に実施例１と
同様の陽極酸化処理を行なう。次いで公知の有機染料の
モルダント・イエローで染色し封孔処理を行った。Anodizing treatment similar to that in Example 1 was performed on an aluminum alloy test piece similar to that in Example 1. Next, it was dyed with Mordant Yellow, a known organic dye, and sealed.
実施例１と同様な試験を行った。結果は以下の通りであ
った：
塩水噴霧試験：８００時間後に白色腐食生成物が発生し
且つ褪色が認められた。A test similar to Example 1 was conducted. The results were as follows: Salt spray test: After 800 hours, white corrosion products were generated and discoloration was observed.
屋外暴露試験：３０日で褪色が認められ、６０日で白色
腐食生成物が発生し且つ完全に変色した。Outdoor exposure test: Discoloration was observed after 30 days, and white corrosion products were generated and the color completely changed after 60 days.
［効果ｊ[effect j
Claims (1)
マイト被膜を形成した後に、０．２〜０．６ｍｏｌ／ｌ
のクロム酸アンモニウムおよび０．０１〜０．０３ｍｏ
ｌ／ｌの三価クロムイオンを含む水溶液に８０〜１００
℃にて浸漬して、アルマイト被膜の孔の中にクロメート
を生成させることにより、アルマイトとクロメートの複
合被膜を形成させることを特徴とするアルミニウム合金
の表面処理方法。After forming an alumite film by performing sulfuric acid anodic oxidation treatment on the aluminum alloy, 0.2 to 0.6 mol/l
of ammonium chromate and 0.01 to 0.03 mo
80 to 100 in an aqueous solution containing l/l trivalent chromium ions.
A method for surface treatment of an aluminum alloy, characterized by forming a composite film of alumite and chromate by immersing it at ℃ to generate chromate in the pores of the alumite film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26026989A JPH03122300A (en) | 1989-10-06 | 1989-10-06 | Surface treatment of aluminum alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26026989A JPH03122300A (en) | 1989-10-06 | 1989-10-06 | Surface treatment of aluminum alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03122300A true JPH03122300A (en) | 1991-05-24 |
| JPH057476B2 JPH057476B2 (en) | 1993-01-28 |
Family
ID=17345712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26026989A Granted JPH03122300A (en) | 1989-10-06 | 1989-10-06 | Surface treatment of aluminum alloy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03122300A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008530362A (en) * | 2005-02-15 | 2008-08-07 | ユナイテッド ステイツ オブ アメリカ アズ レプレゼンテッド バイ ザ セクレタリー オブ ザ ネイビー エト アル． | Method for sealing pores of anodized aluminum phosphate |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS643958A (en) * | 1987-06-26 | 1989-01-09 | Shin Kobe Electric Machinery | Manufacture of cathode plate for alkaline storage battery |
-
1989
- 1989-10-06 JP JP26026989A patent/JPH03122300A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS643958A (en) * | 1987-06-26 | 1989-01-09 | Shin Kobe Electric Machinery | Manufacture of cathode plate for alkaline storage battery |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008530362A (en) * | 2005-02-15 | 2008-08-07 | ユナイテッド ステイツ オブ アメリカ アズ レプレゼンテッド バイ ザ セクレタリー オブ ザ ネイビー エト アル． | Method for sealing pores of anodized aluminum phosphate |
| JP4805280B2 (en) * | 2005-02-15 | 2011-11-02 | ユナイテッド ステイツ オブ アメリカ アズ レプレゼンテッド バイ ザ セクレタリー オブ ザ ネイビー エト アル． | Method for sealing pores of anodized aluminum phosphate |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH057476B2 (en) | 1993-01-28 |
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