GB791502A - Aluminium coating processes - Google Patents
Aluminium coating processesInfo
- Publication number
- GB791502A GB791502A GB14040/55A GB1404055A GB791502A GB 791502 A GB791502 A GB 791502A GB 14040/55 A GB14040/55 A GB 14040/55A GB 1404055 A GB1404055 A GB 1404055A GB 791502 A GB791502 A GB 791502A
- Authority
- GB
- United Kingdom
- Prior art keywords
- per cent
- article
- alloy
- suspension
- alf3
- 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
- C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
- C23C10/18—Solid state diffusion of only metal elements or silicon into metallic material surfaces using liquids, e.g. salt baths, liquid suspensions
-
- 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
- C23C10/18—Solid state diffusion of only metal elements or silicon into metallic material surfaces using liquids, e.g. salt baths, liquid suspensions
- C23C10/20—Solid state diffusion of only metal elements or silicon into metallic material surfaces using liquids, e.g. salt baths, liquid suspensions only one element being diffused
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Treatment Of Metals (AREA)
Abstract
A metal article is coated with Al or Al-base alloy by applying to the surface thereof a composition comprising 75-25 parts by weight of a powder of Al or Al-base alloy and 25-75 parts by weight of a fluxing agent comprising a metal halide mixture the principal part by weight of which consists of NaCl and KCl and the balance of which consists of LiF, Na3AlF6, and if desired AlF3, and heating said surface to a temperature at which the Al or Al-base alloy will melt and flow and alloy with the metal of the article. The Al &c. powder may be composed of pure Al, Al-Si alloy, or Al containing up to 10 per cent of one or more of Cu, Mg and Mn. The preferred flux consists of 70-88 per cent in the aggregate of KCl and NaCl present in a KCl-NaCl ratio between 1.3:1 and 1:1.2 and 30-12 per cent in the aggregate of LiF, Na3, AlF6, and AlF3, the LiF ranging from 3.5-20 per cent, the Na3AlF6 from 8.5-20 per cent, and the AlF3 from 0-20 per cent of the total. The composition may be applied to the surface in the form of a suspension as by spraying, brushing or dipping. The suspension may also contain a suspending agent, a binder, a refractory oxide such as Al2O3, and iron and/or nickel. When water is the suspension vehicle, a corrosion inhibitor such as ammonium chromate is incorporated in the suspension. Suitable organic vehicles are kerosene and Stoddard solvent. The suspending agent may comprise sodium carboxymethylcellulose, sodium algenate, aluminium stearate or aluminium octoate; coumarone-indene type resins may be used as binder. The article to be coated may be of ferrous metal e.g. mild steel, stainless steel, or a super alloy, and may be heat-treated after aluminizing at a temperature of 1500 DEG 1950 DEG F. In the preferred method of coating, the article is degreased, cleaned as by light-pickling or light sand-blasting, coated with the aluminizing composition, dried, fired at a temperature of e.g. 1220 DEG -1500 DEG F., air cooled, washed in hot water, and passivated in dilute HNO3. U.S.A. Specification 1,817,888 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US791502XA | 1954-05-17 | 1954-05-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB791502A true GB791502A (en) | 1958-03-05 |
Family
ID=22148750
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB14040/55A Expired GB791502A (en) | 1954-05-17 | 1955-05-16 | Aluminium coating processes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB791502A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3607369A (en) * | 1968-09-11 | 1971-09-21 | Union Carbide Corp | Method for forming porous aluminum layer |
| CN114990458A (en) * | 2022-07-20 | 2022-09-02 | 中国科学院兰州化学物理研究所 | Nickel plating method for iron-based metal part |
-
1955
- 1955-05-16 GB GB14040/55A patent/GB791502A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3607369A (en) * | 1968-09-11 | 1971-09-21 | Union Carbide Corp | Method for forming porous aluminum layer |
| CN114990458A (en) * | 2022-07-20 | 2022-09-02 | 中国科学院兰州化学物理研究所 | Nickel plating method for iron-based metal part |
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