GB991817A - A process for the preparation of a protective surface layer on aluminium or aluminium alloys - Google Patents
A process for the preparation of a protective surface layer on aluminium or aluminium alloysInfo
- Publication number
- GB991817A GB991817A GB44197/62A GB4419762A GB991817A GB 991817 A GB991817 A GB 991817A GB 44197/62 A GB44197/62 A GB 44197/62A GB 4419762 A GB4419762 A GB 4419762A GB 991817 A GB991817 A GB 991817A
- Authority
- GB
- United Kingdom
- Prior art keywords
- aluminium
- coating
- alloy
- surface layer
- nial3
- 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
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/31—Coating with metals
- C23C18/32—Coating with nickel, cobalt or mixtures thereof with phosphorus or boron
- C23C18/34—Coating with nickel, cobalt or mixtures thereof with phosphorus or boron using reducing agents
- C23C18/36—Coating with nickel, cobalt or mixtures thereof with phosphorus or boron using reducing agents using hypophosphites
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
-
- 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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/12—Light metals
- C23G1/125—Light metals 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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
- C23G1/22—Light metals
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Chemical Treatment Of Metals (AREA)
- Chemically Coating (AREA)
Abstract
Aluminium or aluminium alloys for use in nuclear reactors are protected against corrosion with a surface layer containing Ni and Al, e.g. of NiAl3 covered by Ni2Al3 or Ni but particularly entirely of NiAl3, by coating an aluminium or aluminium alloy body with a phosphorus containing nickel alloy by chemical deposition, e.g. by reduction of Ni ions with sodium hypophosphite to obtain a coating containing up to 12% P, and extracting phosphorus from the coating by the action of an appropriate salt bath which also effects alloying of the Al and Ni by diffusion annealing. The salt bath may consist of NaNO3 or KNO, mixed with KNO2 or NaNO2 respectively in ratios of 0.9.1.1 to 1.1:0.9, the temperature thereof being 450 - 600 DEG C. A preferred basic material may be an aluminium alloy of composition: - Si 8 - 15%, Ni 0.5 - 2%, Fe 0.2 - 1%, Mg 0 - 1.5% Ti 0 - 0.5%, Zr 0 - 0.5%, Al balance. A comparison alloy is disclosed consisting of 1% Ni, 0.5% Fe, 0.3% Si, balance Al. Prior to coating, an aluminium body may be pickled in aqueous NaOH or concentrated HNO3 and HF.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO14225561 | 1961-11-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB991817A true GB991817A (en) | 1965-05-12 |
Family
ID=19908623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB44197/62A Expired GB991817A (en) | 1961-11-22 | 1962-11-22 | A process for the preparation of a protective surface layer on aluminium or aluminium alloys |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE625077A (en) |
| CH (1) | CH405869A (en) |
| GB (1) | GB991817A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2909697A1 (en) * | 1978-03-14 | 1979-09-20 | Centre Rech Metallurgique | METAL STRIP SURFACE TREATMENT METHOD |
-
0
- BE BE625077D patent/BE625077A/xx unknown
-
1962
- 1962-11-21 CH CH1364462A patent/CH405869A/en unknown
- 1962-11-22 GB GB44197/62A patent/GB991817A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE625077A (en) | 1900-01-01 |
| CH405869A (en) | 1966-01-15 |
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