GB1087330A - Surface treatment of articles of magnesium or magnesium alloys - Google Patents
Surface treatment of articles of magnesium or magnesium alloysInfo
- Publication number
- GB1087330A GB1087330A GB51324/64A GB5132464A GB1087330A GB 1087330 A GB1087330 A GB 1087330A GB 51324/64 A GB51324/64 A GB 51324/64A GB 5132464 A GB5132464 A GB 5132464A GB 1087330 A GB1087330 A GB 1087330A
- Authority
- GB
- United Kingdom
- Prior art keywords
- articles
- coating
- polyurethane
- fluoride
- magnesium
- 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
- 229910052749 magnesium Inorganic materials 0.000 title abstract 6
- 229910000861 Mg alloy Inorganic materials 0.000 title abstract 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 title 1
- 239000011777 magnesium Substances 0.000 title 1
- 238000004381 surface treatment Methods 0.000 title 1
- 239000011248 coating agent Substances 0.000 abstract 4
- 238000000576 coating method Methods 0.000 abstract 4
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 abstract 3
- 229920000877 Melamine resin Polymers 0.000 abstract 2
- 229910019400 Mg—Li Inorganic materials 0.000 abstract 2
- 229910045601 alloy Inorganic materials 0.000 abstract 2
- 239000000956 alloy Substances 0.000 abstract 2
- 239000004814 polyurethane Substances 0.000 abstract 2
- 229920002635 polyurethane Polymers 0.000 abstract 2
- MIMUSZHMZBJBPO-UHFFFAOYSA-N 6-methoxy-8-nitroquinoline Chemical compound N1=CC=CC2=CC(OC)=CC([N+]([O-])=O)=C21 MIMUSZHMZBJBPO-UHFFFAOYSA-N 0.000 abstract 1
- CYTYCFOTNPOANT-UHFFFAOYSA-N Perchloroethylene Chemical group ClC(Cl)=C(Cl)Cl CYTYCFOTNPOANT-UHFFFAOYSA-N 0.000 abstract 1
- LDDQLRUQCUTJBB-UHFFFAOYSA-N ammonium fluoride Chemical compound [NH4+].[F-] LDDQLRUQCUTJBB-UHFFFAOYSA-N 0.000 abstract 1
- 239000007864 aqueous solution Substances 0.000 abstract 1
- 239000003792 electrolyte Substances 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 238000007654 immersion Methods 0.000 abstract 1
- 239000012535 impurity Substances 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 150000002739 metals Chemical class 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 239000003973 paint Substances 0.000 abstract 1
- 239000011527 polyurethane coating Substances 0.000 abstract 1
- 230000001681 protective effect Effects 0.000 abstract 1
- 229920005989 resin Polymers 0.000 abstract 1
- 239000011347 resin Substances 0.000 abstract 1
- 239000000243 solution Substances 0.000 abstract 1
- 229950011008 tetrachloroethylene Drugs 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
- 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
- C25D11/30—Anodisation of magnesium or alloys based thereon
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
A method of forming a protective fluoride coating on the surface of articles composed of Mg or Mg base alloys, e.g. Mg-Li, comprises the steps of immersing the articles in a 30-45% by weight ammonium bifluoride aqueous solution and passing an alternating electric current through the solution via the articles which are connected as electrodes. The voltage of the A.C. may be progressively increased until it lies between 110 and 120 volts A.C. and be maintained at this value for at least 30 minutes after the current falls to less than 5 amps/sq.ft. of article surface. Articles may first be cleaned, e.g. with hot tetrachlorethylene vapour. If the articles comprise Mg-Li, they may be heated to at least 200 DEG C., Li exuded as a result of the heating being removed by immersion in continuously circulating water at a temperature below 85 DEG C. The articles are then treated in the NH4F HF, e.g. at a temperature below 27 DEG C. with continuous relative movement between them and the electrolyte. The resultant fluoride coated articles may be coated with resin, e.g. an epoxy-melamine or polyurethane, and may then be painted. The examples are of treating Mg alloy sheet composed of 84.5% Mg, 14% Li, 1% Al and 0.5% trace metals and impurities.ALSO:A Mg or Mg base alloy article with an electrolytically produced fluoride coating (see Division C7) may be given a resinous coating, e.g. of epoxy-melamine or polyurethane, and optionally a final coat of paint or other finish. The resinous coating may be applied in successive layers with each being dried and cured. In Example 1, a polyurethane coating is dried and cured at 150 DEG C for 1 hour.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US332909A US3345276A (en) | 1963-12-23 | 1963-12-23 | Surface treatment for magnesiumlithium alloys |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1087330A true GB1087330A (en) | 1967-10-18 |
Family
ID=23300392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB51324/64A Expired GB1087330A (en) | 1963-12-23 | 1964-12-17 | Surface treatment of articles of magnesium or magnesium alloys |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US3345276A (en) |
| GB (1) | GB1087330A (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5240589A (en) * | 1991-02-26 | 1993-08-31 | Technology Applications Group, Inc. | Two-step chemical/electrochemical process for coating magnesium alloys |
| US5792335A (en) * | 1995-03-13 | 1998-08-11 | Magnesium Technology Limited | Anodization of magnesium and magnesium based alloys |
| DE10022074A1 (en) * | 2000-05-06 | 2001-11-08 | Henkel Kgaa | Protective or priming layer for sheet metal, comprises inorganic compound of different metal with low phosphate ion content, electrodeposited from solution |
| US6916414B2 (en) | 2001-10-02 | 2005-07-12 | Henkel Kommanditgesellschaft Auf Aktien | Light metal anodization |
| US7820300B2 (en) * | 2001-10-02 | 2010-10-26 | Henkel Ag & Co. Kgaa | Article of manufacture and process for anodically coating an aluminum substrate with ceramic oxides prior to organic or inorganic coating |
| US7569132B2 (en) * | 2001-10-02 | 2009-08-04 | Henkel Kgaa | Process for anodically coating an aluminum substrate with ceramic oxides prior to polytetrafluoroethylene or silicone coating |
| US7452454B2 (en) * | 2001-10-02 | 2008-11-18 | Henkel Kgaa | Anodized coating over aluminum and aluminum alloy coated substrates |
| US7578921B2 (en) * | 2001-10-02 | 2009-08-25 | Henkel Kgaa | Process for anodically coating aluminum and/or titanium with ceramic oxides |
| US9701177B2 (en) | 2009-04-02 | 2017-07-11 | Henkel Ag & Co. Kgaa | Ceramic coated automotive heat exchanger components |
| EP4053309A1 (en) * | 2021-03-01 | 2022-09-07 | Canon Kabushiki Kaisha | Alloy member, sliding member, apparatus, and method for manufacturing alloy member |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1574289A (en) * | 1923-01-22 | 1926-02-23 | American Magnesium Corp | Protective coating for magnesium |
| US2332487A (en) * | 1938-11-14 | 1943-10-19 | Dow Chemical Co | Surface treatment for articles of magnesium and alloys thereof |
| US2428749A (en) * | 1944-08-19 | 1947-10-07 | Dow Chemical Co | Surface treatment of magnesium alloys |
| US2459744A (en) * | 1944-12-18 | 1949-01-18 | Firestone Tire & Rubber Co | Adhesion of rubber to magnesium |
| US2692213A (en) * | 1951-04-11 | 1954-10-19 | Chicago Dev Corp | Electrical conductor |
| NL94743C (en) * | 1951-07-04 | |||
| US3012917A (en) * | 1957-03-26 | 1961-12-12 | Pechiney Prod Chimiques Sa | Method of protecting metal surfaces |
| US2961359A (en) * | 1957-09-12 | 1960-11-22 | Gen Electric | Hydrided lithium-magnesium alloys and method |
| US2885315A (en) * | 1958-03-26 | 1959-05-05 | Aluminum Co Of America | Process of treating magnesium-bearing aluminum base alloys with boron trifluoride |
| DE1137280B (en) * | 1958-07-17 | 1962-09-27 | Knapsack Ag | Process for compressing surface-treated workpieces made of light metals and light metal alloys to improve corrosion resistance and wear resistance |
-
1963
- 1963-12-23 US US332909A patent/US3345276A/en not_active Expired - Lifetime
-
1964
- 1964-12-17 GB GB51324/64A patent/GB1087330A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US3345276A (en) | 1967-10-03 |
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