Claims
- 1. A method for producing a galvanically deposited dispersion layer comprising a cobalt matrix and a non-metallic dispersion phase of chromic oxide particles (Cr.sub.2 O.sub.3) embedded in said cobalt matrix, comprising the following steps:
- (a) preparing an electrolytic bath having a cobalt ion content,
- (b) suspending chromic oxide particles in said electrolytic bath,
- (c) adjusting the pH-value of the electrolytic bath to be within the range of 4.5 to 4.9,
- (d) operating the bath at a temperature within the range of 40.degree. C. to 60.degree. C., and
- (e) adjusting the current density to a value within the range of 1 amp/dm.sup.2 to 6 amps/dm.sup.2 for depositing said dispersion layer with the chromic oxide particles embedded in said cobalt matrix on a structural component.
- 2. The method of claim 1, wherein said step of preparing said electrolytic bath comprises preparing an aqueous solution of the following ingredients:
- (a) 430 to 470 grams/liter of cobalt sulfate (CoSO.sub.4 . 6H.sub.2 O),
- (b) 15 to 20 grams/liter of sodium chloride (NaCl), and
- (c) 25 to 30 grams/liter of boric acid (H.sub.3 BO.sub.3).
- 3. The method of claim 1, further comprising subjecting said galvanically deposited layer to a heat treatment at a temperature and duration sufficient for an intended oxidation of said cobalt matrix.
- 4. The method of claim 3, wherein said heat treatment is performed at a temperature within the range of about 500.degree. C. to about 700.degree. C. for a duration of about seven to nine hours.
- 5. The method of claim 1, wherein said layer is deposited on a structural component subject to wear and made of a nickel alloy.
- 6. The method of claim 1, wherein said layer is deposited on a structural component subject to wear and made of a titanium alloy.
- 7. The method of claim 6, wherein said titanium alloy comprises the following composition:
- 6% by weight, of aluminum,
- 5% by weight, of zirconium,
- 0.8% by weight, of molybdenum,
- 0.2% by weight, of silicon, and
- the remainder being titanium.
- 8. The method of claim 1, wherein said electrolytic bath is operated at a temperature of about 50.degree. C.
- 9. The method of claim 1, wherein said current density is adjusted to about 3.5 amps/dm.sup.2.
Priority Claims (1)
Number |
Date |
Country |
Kind |
3327346 |
Jul 1983 |
DEX |
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Parent Case Info
This is a divisional of application Ser. No. 592,851 filed Mar. 23, 1984.
US Referenced Citations (2)
Foreign Referenced Citations (1)
Number |
Date |
Country |
1358538 |
Jul 1974 |
GBX |
Divisions (1)
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Number |
Date |
Country |
Parent |
592851 |
Mar 1984 |
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