Method of coating articles of magnesium and an electrolytic bath

Details Method of coating articles of magnesium and an electrolytic bath Method of coating articles of magnesium and an electrolytic bath

1985-10-25

1986-11-04

Andrews, R. L.

Chemistry: electrical and wave energy

Processes and products

106 74, C25D 1100

Patent

active

046209042

ABSTRACT:
An electrolytic bath for coating articles of magnesium and its alloys consists essentially of an aqueous solution containing an alkali metal silicate (e.g., potassium silicate), an alkali metal hydroxide (e.g., potassium hydroxide) and a fluoride (e.g., hydrofluoric acid). In the process, the magnesium article is immersed in the bath and an electrical potential is applied between the magnesium article serving as the anode, and a cathode immersed in the bath until a visible spark is discharged on the surface of the metal. The potential difference is maintained for a few minutes until the desired coating thickness is formed.

REFERENCES:
patent: 3996115 (1976-12-01), Kessler

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