Conductive coatings for metal substrates

Details Conductive coatings for metal substrates Conductive coatings for metal substrates

1980-05-06

1982-05-25

Kendall, Ralph S.

Metal treatment

Compositions

Heat treating

148 624, 427122, C23F 700, C23F 708

Patent

active

043314872

ABSTRACT:
A method and composition are described for preparing metal surfaces, especially zinc, for receiving an electrically conductive coating, the preparatory composition being an aqueous solution containing about 2 to about 25 weight percent of the mixture of salts of heavy metals, an oxidizing agent, and a mineral acid. The preparatory coating has utility in battery manufacture.
A preferred preparatory coating composition for zinc-base surfaces is a solution comprising about 0.1 to 2.5 weight percent salt of a heavy metal such as ferric nitrate, about 0.01 to about 3.5 weight percent of an oxidizing agent such as sodium or potassium persulfate, about 2 to about 20 weight percent of a mineral acid such as sulfuric acid (98%) or phosphoric acid (75%), and the remainder water. Another preferred preparatory coating composition for metal surfaces including zinc and zinc-base alloys is an aqueous solution consisting of about 0.1 to 2.5 weight percent salt of a heavy metal, about 0.01 to about 3.5 weight percent oxidizing agent, about 2 to about 20 weight percent of a mineral acid, and the remainder water.

REFERENCES:
patent: 3708350 (1973-01-01), Kennedy et al.

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