ES2006132A6 - Electrolyte for anodising aluminium articles - contains alkali silicate, peroxide, organic carboxylic acid and fluoride - Google Patents
Electrolyte for anodising aluminium articles - contains alkali silicate, peroxide, organic carboxylic acid and fluorideInfo
- Publication number
- ES2006132A6 ES2006132A6 ES8701143A ES8701143A ES2006132A6 ES 2006132 A6 ES2006132 A6 ES 2006132A6 ES 8701143 A ES8701143 A ES 8701143A ES 8701143 A ES8701143 A ES 8701143A ES 2006132 A6 ES2006132 A6 ES 2006132A6
- Authority
- ES
- Spain
- Prior art keywords
- peroxide
- fluoride
- silicate
- electrolyte
- anodising
- 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
Links
Abstract
Al (alloys) are coated with a hard, adherent, smooth, uniform, corrosion-resistant coating by anodising in an electrolyte contg. an alkali metal silicate, a peroxide, a soluble carboxylic organic acid and a fluoride. The potential is raised to 300V in 1-5 sec. and then raised to 450 V within a few mins.. A V cpd. may also be present to impart colour. Pref. silicate is K, Na or Li silicate, K tetra- or K fluorosilicate peroxide is K, Na, Li or Cs peroxide acid is acetic, pergonic, propionic or tartaric acid fluoride is HF, fluorosilicic acid, NaF, KF or LiF or mixts. of these. Bath is held at 0.5-30 Be. Cathode is a separate metal electrode or the container. Bath for anodising Al (alloy) articles is claimed contg.: an alkali metal silicate, a peroxide, a carboxylic organic acid and a fluoride, pref. in respective concn. of: 1-200 cc/l 1-20 g/l 1-30 cc/l and 1-30 cc/l.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES8701143A ES2006132A6 (en) | 1985-10-24 | 1987-04-20 | Electrolyte for anodising aluminium articles - contains alkali silicate, peroxide, organic carboxylic acid and fluoride |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/790,937 US4659440A (en) | 1985-10-24 | 1985-10-24 | Method of coating articles of aluminum and an electrolytic bath therefor |
PCT/US1987/000867 WO1988008046A1 (en) | 1985-10-24 | 1987-04-17 | Method of coating articles of aluminum and an electrolytic bath therefor |
ES8701143A ES2006132A6 (en) | 1985-10-24 | 1987-04-20 | Electrolyte for anodising aluminium articles - contains alkali silicate, peroxide, organic carboxylic acid and fluoride |
Publications (1)
Publication Number | Publication Date |
---|---|
ES2006132A6 true ES2006132A6 (en) | 1989-04-16 |
Family
ID=26154337
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES8701143A Expired ES2006132A6 (en) | 1985-10-24 | 1987-04-20 | Electrolyte for anodising aluminium articles - contains alkali silicate, peroxide, organic carboxylic acid and fluoride |
Country Status (1)
Country | Link |
---|---|
ES (1) | ES2006132A6 (en) |
-
1987
- 1987-04-20 ES ES8701143A patent/ES2006132A6/en not_active Expired
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FD1A | Patent lapsed |
Effective date: 19980401 |