Chemistry: electrical and wave energy – Processes and products
Patent
1978-11-20
1980-04-01
Mack, John H.
Chemistry: electrical and wave energy
Processes and products
134 2, C25D 552
Patent
active
041960629
ABSTRACT:
A method for brightening an electroplated chromium deposit wherein the deposited chromium is contacted with a solution having a constituent capable of forming complexes with chromium hydroxide species and of detaching the complexes so formed from the surface of an electroplated deposit. Preferably the solution is an alkaline ferricyanide solution or a solution of sodium dichromate in sulphuric acid.
REFERENCES:
patent: 3216912 (1965-11-01), Shoemaker
patent: 3573984 (1971-04-01), Shah
patent: 3755091 (1973-08-01), Austin
patent: 3966570 (1976-06-01), Yamagishi et al.
Barclay Donald J.
Vigar James M.
Hogg William N.
International Business Machines - Corporation
Leader William
Mack John H.
Sirr Francis A.
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