Method and apparatus for depositing hard chrome coatings by brus

Details Method and apparatus for depositing hard chrome coatings by brus Method and apparatus for depositing hard chrome coatings by brus

1994-01-10

1995-09-26

Valentine, Donald R.

Electrolysis: processes, compositions used therein, and methods

Electrolytic coating

Utilizing brush or absorbent applicator

205118, 204217, 204271, 204275, 204212, 204224R, 204237, 204293, 204292, 204227, C25D 506, C25D 1714

Patent

active

054531748

ABSTRACT:
Thick layers of hard dense chromium coatings are formed on metal substrates by an electrolytic brush plating operation in which a lead-tin anode is closely positioned to a cathodic workpiece in full anode wrap relationship and the surface of the cathodic workpiece is wiped by an open construction wiper to remove hydrogen bubbles and/or outwardly extending dendritic coating material with minimum contact with and force upon the coating surface. The open wiper construction allows free access to the coated surface at all times of fresh undepleted coating electrolyte and allows hydrogen bubbles and dendritic material to be discharged unimpeded from the wiper structure.

REFERENCES:
patent: 3751343 (1973-08-01), Machula et al.
patent: 4235691 (1980-11-01), Loqvist
patent: 4452684 (1984-06-01), Palnik
patent: 4610772 (1986-09-01), Palnik
patent: 4713149 (1987-12-01), Hoshino
patent: 4738756 (1988-04-01), Mseitif
patent: 4879015 (1989-11-01), Adamek et al.
patent: 5277785 (1994-01-01), Van Anglen

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