GB779972A - Improvements relating to the coating of metal articles with aluminium - Google Patents
Improvements relating to the coating of metal articles with aluminiumInfo
- Publication number
- GB779972A GB779972A GB25264/55A GB2526455A GB779972A GB 779972 A GB779972 A GB 779972A GB 25264/55 A GB25264/55 A GB 25264/55A GB 2526455 A GB2526455 A GB 2526455A GB 779972 A GB779972 A GB 779972A
- Authority
- GB
- United Kingdom
- Prior art keywords
- per cent
- aluminium
- flux
- coating
- article
- 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
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
- C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
- C23C24/106—Coating with metal alloys or metal elements only
-
- 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
- C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
- C23C10/28—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes
-
- 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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
- C23C4/08—Metallic material containing only metal elements
-
- 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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/18—After-treatment
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Coating By Spraying Or Casting (AREA)
- Coating With Molten Metal (AREA)
Abstract
779,972. Coating metals. GENERAL MOTORS CORPORATION. Sept. 2, 1955 [Sept. 29, 1954], No. 25264/55. Class 82(2) [Also in Group XXVII] Articles of ferrous metal, titanium or titanium base alloys, nickel base alloys, molybdenum or its alloys, such as nuts and bolts, tubing, wire, woven metal fencing but particularly poppet valves for I.C. engines are coated with alminium by painting or spraying on a coating of aluminium-containing material (which may be molten aluminium) and then heating the article whilst the coating is in contact with a salt flux containing potassium and sodium chlorides, cryolite and aluminium fluoride, so that the aluminium is caused to alloy with the surface. The flux may be mixed with the A1-containing material and the mixture painted or sprayed on to the article which is then heated by e.g. induction of 1275-1400‹F; or, the molten flux may serve as a bath to heat the article already coated with the aluminium-containing material in which case the article may be rapidly rotated or vibrated in the flux or on removal therefrom, whilst preheating to 1000-1100‹F. before immersion is also desirable. As described, a poppet valve 10 is cleaned and if necessary pickled in an aqueous solution of some 2 per cent HF, 7 per cent H 2 SO 4 , 10 per cent HNO, and sand-blasted. A layer 16 comprising molten Al or a paste of approximately 30-50 per cent by volume of Al powder 10- 20 per cent of binder such as lacquer or resin solution and 30-50 per cent of a thinner or solvent such as acetone. is then sprayed or painted on after which the valve - preferably pre-heated to 1000-1100‹F. - is immersed to the line a-a and rapidly rotated or longitudinally reciprocated in a molten flux bath consisting of 37-57 per cent by weight KC1. 25-45 per cent Na C1 8-20 per cent Na 3 A1F 6 and 0.5-12 per cent Al F 3 which is maintained preferably at 1325-1375‹F If the flux is incorporated in the coating paste, heating should be in an inert or reducing atmosphere.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US779972XA | 1954-09-29 | 1954-09-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB779972A true GB779972A (en) | 1957-07-24 |
Family
ID=22141239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB25264/55A Expired GB779972A (en) | 1954-09-29 | 1955-09-02 | Improvements relating to the coating of metal articles with aluminium |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR1159570A (en) |
| GB (1) | GB779972A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1204911B (en) * | 1957-07-30 | 1965-11-11 | Edward Peter Schreyer | Method and device for the production of heat, corrosion and erosion-resistant protective coatings made of aluminum or an aluminum alloy on metallic objects, in particular engine valves, by immersion in a molten metal bath |
| WO2005035819A1 (en) * | 2003-10-11 | 2005-04-21 | Mtu Aero Engines Gmbh | Method for local alitising, siliconising and chroming of metal components |
| EP1528117A1 (en) * | 2003-10-31 | 2005-05-04 | General Electric Company | Diffusion coating process |
-
1955
- 1955-09-02 GB GB25264/55A patent/GB779972A/en not_active Expired
- 1955-09-28 FR FR1159570D patent/FR1159570A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1204911B (en) * | 1957-07-30 | 1965-11-11 | Edward Peter Schreyer | Method and device for the production of heat, corrosion and erosion-resistant protective coatings made of aluminum or an aluminum alloy on metallic objects, in particular engine valves, by immersion in a molten metal bath |
| WO2005035819A1 (en) * | 2003-10-11 | 2005-04-21 | Mtu Aero Engines Gmbh | Method for local alitising, siliconising and chroming of metal components |
| EP1528117A1 (en) * | 2003-10-31 | 2005-05-04 | General Electric Company | Diffusion coating process |
| US7390534B2 (en) | 2003-10-31 | 2008-06-24 | General Electric Company | Diffusion coating process |
Also Published As
| Publication number | Publication date |
|---|---|
| FR1159570A (en) | 1958-06-30 |
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