Plating on aluminum,magnesium or zinc
Abstract
Abstract A PROCESS FOR PLATING ALUMINUM, MAGNESIUM OR ZINC WITH AN ADHERENT NICKEL COATING IS PROVIDED. THE PROCESS COMPRISES CONTACTING THE SURFACE OF THE METAL TO BE TREATED WITH AN AQUEOUS SOLUTION OF HYDROFLUORIC ACID OR A MATERIAL WHICH RELEASES HYDROFLUORIC ACID, SUCH AS AMMONIUM BIFLUORIDE, AND A SOLUBLE, CATALYTIC METAL SALT OF A METAL SUCH AS NICKEL, IRON OR SILVER, AND SUBSEQUENTLY APPLYING A NICKEL COATING WHICH IS STRESS-FREE TO SAID TREATED METAL SURFACE, PREFERABLY 0.2 TO 1 MIL IN THICKNESS, FROM AN AMINE BORANE REDUCTIVE PLATING SOLUTION MAINTAINED AT A PH OF ABOUT 6 TO 7 AND CONTAINING AN ORGANIC MONOVALENT OR DIVALENT SULFUR COMPOUND. A THICKER NICKEL OVERCOATING CAN BE SUBSEQUENTLY APPLIED TO THE NICKEL COATING USING EITHER HYPOPHOSPHITE OR BOROHYDRIDE REDUCTIVE PLATING BATHS, OR ELECTROPLATED NICKEL. FURTHER, ADHESION AND WEAR RESISTANCE CAN BE UPGRADED BY POST HEAT-TREATING.
Inventors
- 👤 Harold Edward Bellis
Bibliographic Details
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |