Method for forming tough, electrical insulating layer on surface

Details Method for forming tough, electrical insulating layer on surface Method for forming tough, electrical insulating layer on surface

1994-03-07

1995-03-28

Niebling, John

Electrolysis: processes, compositions used therein, and methods

Electrolytic coating

Forming multiple superposed electrolytic coatings

205333, C25D 1134

Patent

active

054013828

ABSTRACT:
A method is provided for forming a tough, electrical insulating layer on a surface of a copper material. The copper material is made of copper of a copper-based alloy at least in the surface thereof. According to the method, the copper material is anodized first in an alkaline electrolyte bath of a caustic alkali to form a thin film layer of cupric oxide on the surface of the copper material, and next in an acidic electrolytic bath of a hexacyanoiron complex.

REFERENCES:
patent: 2745898 (1956-05-01), Hurd
patent: 5078844 (1992-01-01), Katsuma

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