Process for the production of oxide ceramic surface films on sil

Details Process for the production of oxide ceramic surface films on sil Process for the production of oxide ceramic surface films on sil

1992-05-18

1993-07-06

Tufariello, T. M.

Electrolysis: processes, compositions used therein, and methods

Electrolytic coating

Forming nonmetal coating

205332, C25D 1116

Patent

active

052250695

ABSTRACT:
A process for the production of white and black oxide ceramic surface films on silicon-containing light metal cast alloys by plasma-chemical anodic oxidation. An aluminum cast alloy is pickled with nitric acid and hydrofluoric acid and coated by plasma-chemical anodic oxidation in an aqueous electrolyte. Accordingly, a coating variant is provided particularly for construction parts of silicon-containing light metal cast alloys having complicated shapes which enables the production of uniformly thin oxide ceramic surface films in contrast to conventional coating variants.

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