Henry J Wittrock Deceased188 Mosshill Ct, Santa Rosa, CA 95409
Henry Wittrock Phones & Addresses
188 Mosshill Ct, Santa Rosa, CA 95409
Pleasanton, CA
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Us Patents
Anodizing Pretreatment For Nickel Plating
US Patent:
3943039, Mar 9, 1976
Filed:
Oct 8, 1974
Appl. No.:
5/513197
Inventors:
Henry J. Wittrock - Pleasanton CA
Assignee:
Kaiser Aluminum & Chemical Corporation - Oakland CA
International Classification:
C25D 544
C25D 1108
C25D 1108
US Classification:
204 42
Abstract:
This invention relates to a process of pretreating an aluminum surface for subsequent nickel plating to provide improved adhesion and corrosion resistance. The pretreatment process comprises subjecting the aluminum surface to anodizing in a phosphoric acid electrolyte in such a manner so that the voltage is increased to operating levels within 30 seconds, preferably in less than 15 seconds.
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