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Herbert E Ricks Deceased5134 Grebel Ln, Sarasota, FL 34232
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5134 Grebel Ln, Sarasota, FL 34232
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Us Patents
Hard Chromium Plating Process For Cobalt-Chromium-Tungsten Alloys
US Patent:
4366034, Dec 28, 1982
Filed:
Jun 4, 1981
Appl. No.:
6/270459
Inventors:
Herbert E. Ricks - Sarasota FL
Edward F. Sverdrup - North Huntingdon PA
Edward F. Sverdrup - North Huntingdon PA
Assignee:
Westinghouse Electric Corp. - Pittsburgh PA
International Classification:
C25D 538
US Classification:
204 32R
Abstract:
This is a process for providing good adhesion of chromium electroplated onto a chromium and tungsten containing cobalt alloy (comprising 40-60% by weight cobalt, 19-25% chromium and 10-20% tungsten). Prior to electroplating, the cobalt alloy surface is etched with a 1-45% ferric solution for 1-200 minutes at 10. degree. -100. degree. C. Preferably, the surface is cleaned with an alkaline solution prior to etching and rinsed with cold water after etching.
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