Robert L Michaud

US Patent:

44915004, Jan 1, 1985

Filed:

Feb 17, 1984

Appl. No.:

6/581420

Inventors:

Mark D. Michaud - Bristol CT
Robert G. Michaud - Bristol CT
Frank Tirendi - Hamden CT
Robert G. Zobbi - Southbury CT

Assignee:

Rem Chemicals, Inc. - Southington CT

International Classification:

C23F 100
C23F 502
C23C 110

US Classification:

156628

Abstract:

Metal surfaces are refined, by the process of the invention, to high levels of smoothness in relatively short periods of time. A liquid substance is utilized to produce a conversion coating on the surface of the parts being treated, which are agitated, while being continuously wetted by the substance, in a mass finishing unit. Abrasive action causes the relatively soft coating to be removed from the high points of the surface, while leaving substantially intact the coating on the lower surface areas, with the coating being continuously repaired over metal exposed during operation. Fillage of the finishing unit container ensures efficient agitation and continuous oxygenation of the liquid substance, thereby maintaining a desirable rate of reaction and a high rate of surface leveling.