FR2058759A5 - Opaque anodised surfaces on aluminium - (alloys) - Google Patents
Opaque anodised surfaces on aluminium - (alloys)Info
- Publication number
- FR2058759A5 FR2058759A5 FR6932576A FR6932576A FR2058759A5 FR 2058759 A5 FR2058759 A5 FR 2058759A5 FR 6932576 A FR6932576 A FR 6932576A FR 6932576 A FR6932576 A FR 6932576A FR 2058759 A5 FR2058759 A5 FR 2058759A5
- Authority
- FR
- France
- Prior art keywords
- pref
- bath
- anodising
- h3po4
- h2so4
- 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
- 229910045601 alloy Inorganic materials 0.000 title 1
- 239000000956 alloy Substances 0.000 title 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title 1
- 229910052782 aluminium Inorganic materials 0.000 title 1
- 239000004411 aluminium Substances 0.000 title 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 abstract 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 abstract 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract 2
- 238000007743 anodising Methods 0.000 abstract 2
- 235000011007 phosphoric acid Nutrition 0.000 abstract 2
- 235000011149 sulphuric acid Nutrition 0.000 abstract 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 abstract 1
- 239000002253 acid Substances 0.000 abstract 1
- 238000013019 agitation Methods 0.000 abstract 1
- 238000009835 boiling Methods 0.000 abstract 1
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 abstract 1
- 238000005868 electrolysis reaction Methods 0.000 abstract 1
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 229910017604 nitric acid Inorganic materials 0.000 abstract 1
- 238000005498 polishing Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F3/00—Electrolytic etching or polishing
- C25F3/16—Polishing
- C25F3/18—Polishing of light metals
- C25F3/20—Polishing of light metals of aluminium
-
- 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
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F3/00—Brightening metals by chemical means
- C23F3/02—Light metals
- C23F3/03—Light metals with acidic solutions
-
- 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
- C25D11/12—Anodising more than once, e.g. in different baths
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)
Abstract
Process comprises (a) polishing in a bath comprising conc. H3PO4, HNO3, H2SO4 and an acid which will not complex with H3PO4, (b) anodising in a bath containing 150-200 g/l H2SO4, temp. 20-30 degrees C, current density 1A/dm2 for 5-10 mins. (c) Chromic anodising in 15-19 wt% chromic acid at 30 degrees C and at 25 pref. 21-23 volts, the anodic surface in dm2 being 1.7B- 2.3B, "B" being volume of bath in litres. The cathodic surface in dm2 being 0.06B pref. 0.03B-0.05B. Electrolysis is carried out without agitation. The relationship between atoms dissolved chrome in the hexavalent state and atoms disolved chrome in the trivalent state remains constant at a value always >70 and opt. >120. All operations are pref. separated by rinsing and followed by settling in deionised boiling water.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE756575D BE756575A (en) | 1969-09-24 | PROCESS FOR OBTAINING OPAQUE ANODIC COATINGS | |
| FR6932576A FR2058759A5 (en) | 1969-09-24 | 1969-09-24 | Opaque anodised surfaces on aluminium - (alloys) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR6932576A FR2058759A5 (en) | 1969-09-24 | 1969-09-24 | Opaque anodised surfaces on aluminium - (alloys) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2058759A5 true FR2058759A5 (en) | 1971-05-28 |
Family
ID=9040547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR6932576A Expired FR2058759A5 (en) | 1969-09-24 | 1969-09-24 | Opaque anodised surfaces on aluminium - (alloys) |
Country Status (2)
| Country | Link |
|---|---|
| BE (1) | BE756575A (en) |
| FR (1) | FR2058759A5 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7601425B2 (en) | 2003-03-07 | 2009-10-13 | The Curators Of The University Of Missouri | Corrosion resistant coatings containing carbon |
| US7759419B2 (en) | 2003-01-17 | 2010-07-20 | The Curators Of The University Of Missouri | Corrosion resistant coatings |
-
0
- BE BE756575D patent/BE756575A/en unknown
-
1969
- 1969-09-24 FR FR6932576A patent/FR2058759A5/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7759419B2 (en) | 2003-01-17 | 2010-07-20 | The Curators Of The University Of Missouri | Corrosion resistant coatings |
| US7601425B2 (en) | 2003-03-07 | 2009-10-13 | The Curators Of The University Of Missouri | Corrosion resistant coatings containing carbon |
Also Published As
| Publication number | Publication date |
|---|---|
| BE756575A (en) | 1971-03-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |