Process for decreasing the porosity of gold

Details Process for decreasing the porosity of gold Process for decreasing the porosity of gold

1977-06-29

1978-01-31

Kaplan, G. L.

Chemistry: electrical and wave energy

Processes and products

204 38R, 204 40, 204140, C25D 548, C25D 1138

Patent

active

040714179

ABSTRACT:
A process is described for making modified gold platings of low porosity. This process involves first putting down a gold layer and then passivating this layer using an electrochemical chromating procedure. This process permits use of much thinner gold layers than ordinarily used without the danger of corrosion of underlying base metal.

REFERENCES:
patent: 3625844 (1971-12-01), McKean
patent: 3632389 (1972-01-01), Vazirani
patent: 3700469 (1972-10-01), Okinaka
Journal of Electrochemical Society, vol. 120, No. 6, June 1973, p. 735.
Protective Coatings for Metals, Third Edition; American Chemical Society, Monograph Series No. 163; Reinhold, 1967, pp. 27-54.
Reid and Goldie, Gold Plating Technology, Electrochemical Publications Limited, 1974, pp. 21-52.
Lowenheim, Modern Electroplating, Wiley, 1963, pp. 224-244, Metal Finishing, Sept. 1975, p. 29.

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