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Page 1: Protective coating for zinciferous surfaces

groups; a curing agent havinggroups that are reactive with thefunctional groups; and a com­pound comprising at least onecarbamate group that is the reac­tion product of a hydroxyl groupthat is the result ofa ring-openingreaction between an epoxy groupand an organic acid group andcyanic acid or a carbamate group.

VIBRATORY ..NISHING PROCESSU.S. Patent 5,873,770. Feb. 23, 1999F. Hashimoto, assignor to TheTimken Co., Canton, OhioIn a workpiece having at least oneexterior surface, the improve­ments comprising the exteriorsurface having a predefined de­sired average surface roughnessobtained by subjecting to a vibra-

tory finishing process for a prede­termined processing time.

RECOVEIIY OP PAINT OVUlSPRAYU.S. Patent 5,873,945. Feb. 23, 1999R.R. Patzelt and T. Randazzo,assignors to Nortru Inc., Detroit

A method for recovering a volatileorganic material consisting essen­tially of carbonyl compounds fromsolvent-in-water emulsions de­rived from paint overspray treat­ment and capture systems.

PIIOTEC'mIE COAnN. PORZINCIfEROUS SURPACISU.S. Patent 5,873,952. Feb. 23, 1999J.R. Hall and T.J. Prescott,assignors to Henkel Corp., GulphMills, Pa.

A process of forming, over a spec­ified period of time, a protective

coating on one or more zinciferoussurface(s) by contacting with atleast a portion of a specified totalvolume of an aqueous liquid treat­ment composition comprising wa­ter, transition metal cations, andfluorometallate anions.

IlIOIlICHROMAnD COAnNG PORALUMINUMU.S. Patent 5,873,953. Feb. 23, 1999M.P. Schriever, assignor to TheBoeing Co., Seattle

An improved process for formingan oxide film cobalt conversioncoating exhibiting corrosion resis­tance and paint adhesion proper­ties on aluminum or aluminum al­loy comprising an oxide filmforming cobalt conversion solutioncontaining no triethanolamine con-

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