Anode for chromium plating and processes for producing and using

Details Anode for chromium plating and processes for producing and using Anode for chromium plating and processes for producing and using

1991-09-04

1993-08-03

Niebling, John

Electrolysis: processes, compositions used therein, and methods

Electrolytic coating

Depositing predominantly single metal coating

204290F, 427125, 4271265, C25D 1710, C25D 304, B05D 512

Patent

active

052325768

ABSTRACT:
There are described an anode, a process for producing the same, an apparatus for electrolytic chromium plating, and a method for electrolytic chromium plating, using such anode, wherein the anode comprises an electrically conductive substrate comprising a valve metal or an alloy thereof, a first intermediate layer formed on the sustrate and comprising an oxide of tin, a second intermediate layer formed on the first intermediate layer and comprising either (1) platinum metal and an oxide of tin, or (2) platinum metal, an oxide of tin, and iridium oxide, and a surface layer formed on the second intermediate layer and comprising either (1) platinum metal and an oxide of tin, or (2) platinum metal, an oxide of tin, and iridium oxide, the composition of said surface layer being different form that of said second intermediate layer.

REFERENCES:
patent: 3882002 (1975-05-01), Cook, Jr.
patent: 4581117 (1986-04-01), Asano et al.
Chemical Abstract 95: 51800e, Aug. 10, 1981.
Chemical Abstract 101: 179898c, Nov. 12, 1989.
Chemical Abstract 108: 121032u, Apr. 4, 1988.
Chemical Abstract 111: 242636q, Dec. 25, 1989.

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