Anodizing pretreatment for nickel plating

Details Anodizing pretreatment for nickel plating Anodizing pretreatment for nickel plating

1974-10-08

1976-03-09

Kaplan, G. L.

Chemistry: electrical and wave energy

Processes and products

204 58, C25D 544, C25D 1108

Patent

active

039430391

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.

REFERENCES:
patent: 3098804 (1963-07-01), Wittrock
H. J. Wittrock, 48th Annual Tech. Proceedings, Am. Electroplaters' Soc., pp. 52-59, (1961).

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