GB709391A - Improvements in or relating to the surface treatment of aluminium of aluminium alloys - Google Patents
Improvements in or relating to the surface treatment of aluminium of aluminium alloysInfo
- Publication number
- GB709391A GB709391A GB23800/49A GB2380049A GB709391A GB 709391 A GB709391 A GB 709391A GB 23800/49 A GB23800/49 A GB 23800/49A GB 2380049 A GB2380049 A GB 2380049A GB 709391 A GB709391 A GB 709391A
- Authority
- GB
- United Kingdom
- Prior art keywords
- aluminium
- solution
- oxide layer
- relating
- nitric
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/82—After-treatment
- C23C22/83—Chemical after-treatment
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/34—Pretreatment of metallic surfaces to be electroplated
- C25D5/42—Pretreatment of metallic surfaces to be electroplated of light metals
- C25D5/44—Aluminium
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Chemical Treatment Of Metals (AREA)
Abstract
Prior to coating, aluminium and aluminium alloys are treated in an aqueous solution containing caustic alkalies and soluble chromates and the oxide layer formed thereby at least partially dissolved. The alkali: chromate ratio may vary between 0.5:1 and 45:1 and the solution may also contain phosphates, citrates, permangenates or wetting agents. The oxide layer may be dissolved in an acid solution, e.g. suphuric, phosphoric, nitric, hydrofluoric, hydrochloric, chloric, bromic, chromic, formic, acetic, lactic, citric, oxalic, chloracetic, tartaric or sulphosalicylic; a mixture of nitric acid and ammonium fluoride; or an alkaline solution. The articles may then be electroplated, e.g. with copper, followed by nickel. Alternatively, the electrolytic solution may be used, before current is passed, to remove an oxide film.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH709391X | 1948-09-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB709391A true GB709391A (en) | 1954-05-26 |
Family
ID=4530647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB23800/49A Expired GB709391A (en) | 1948-09-17 | 1949-09-15 | Improvements in or relating to the surface treatment of aluminium of aluminium alloys |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE491077A (en) |
| DE (1) | DE813472C (en) |
| FR (1) | FR995320A (en) |
| GB (1) | GB709391A (en) |
| NL (2) | NL71562C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4116754A (en) * | 1976-09-30 | 1978-09-26 | International Business Machines Corporation | Method of forming matt display electrode |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3099576A (en) * | 1960-06-24 | 1963-07-30 | Clevite Corp | Selective gold plating of semiconductor contacts |
| CN115161651A (en) * | 2022-05-13 | 2022-10-11 | 山东裕航特种合金装备有限公司 | Treatment device and method suitable for local surface of aluminum alloy casting |
-
0
- NL NL717112271A patent/NL148719B/en unknown
- NL NL71562D patent/NL71562C/xx active
- BE BE491077D patent/BE491077A/xx unknown
-
1949
- 1949-07-20 DE DEP49431A patent/DE813472C/en not_active Expired
- 1949-09-13 FR FR995320D patent/FR995320A/en not_active Expired
- 1949-09-15 GB GB23800/49A patent/GB709391A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4116754A (en) * | 1976-09-30 | 1978-09-26 | International Business Machines Corporation | Method of forming matt display electrode |
Also Published As
| Publication number | Publication date |
|---|---|
| DE813472C (en) | 1951-09-13 |
| BE491077A (en) | |
| NL71562C (en) | |
| NL148719B (en) | |
| FR995320A (en) | 1951-11-30 |
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