Surface preparation process for recoating of used coated metallic electrodes
USRE28849E · kind E · reissue
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12Claims
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Key dates
| Filing date | Oct 9, 1975 |
| Grant date | Jun 8, 1976 |
| Priority date | — |
| Expiry date | Oct 9, 1995 |
Classification
- Technology area (CPC —)General
Abstract
A surface preparation process for use in recoating of used metallic electrodes coated with one or more platinum group metals, one or more iron group metals, or chemical compounds thereof, which comprises using said metallic electrode(s) as anode(s) and passing a current between said metallic electrode(s) and a steel cathode(s) in an aqueous solution of sulfuric acid, nitric acid, perchloric acid, salts thereof, chlorates or persulfates, or a mixture solution thereof, and then dipping said metallic electrode(s) into an aqueous solution of hydrofluoric acid or hydrochloric acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.