pound comprising colloidal alumina and a pow- der of a substance that is harder than the material to be polished; and imparting relative motion to the material to be polished.

Electrostatic Spray Device U.S. Patent5,584,931. Dec. 17, 1996 ET: Buhlmann, assignor to Gema Volsfafic AG, St. Gal/en, Switierland

An electrostatic spray device for coatingob- jects, comprising a spray gun having an outlet disposed upon a gun axis; means for discharg- ing coating material from the outlet of the spray gun; and a charging electrode for electmstati- tally charging the coating material so that it is attracted to an object to be coated.

Cleaning and Surface Conditioning of Aluminum US. Patent 5,584,943. Dec. 17, 1996 RD. Banaszak et al, assignors to Henkel Corp., Plvmoufh Meefina, Pa.

Aqueous Lubricant and Surface Conditioner U.S. Pafent5,584,944. Dec. 17, 1996 J.P Bershas et al., assignors to Henkel Corp., Plymouth Meeting, Pa.

A process comprising steps of cleaning an aluminum can with an aqueous acidic or alkaline cleaning solution, drying the cleaned can, and subsequently conveying the cleaned and dried can via automatic conveying equipment to a location where it is lacquered or decorated by printing or both, wherein the improvement comprises contacting at least one exterior surface of the aluminum can with a lubricant and surface conditioner forming composition consisting essentially of water, a compo- nent selected from the group consisting of quaternary ammonium salt and amine ox- ide surfactants, and including a component of complex fluoride anions.

Conversion Coating for

them with acidic aqueous treatment solutions, which contain complex fluorides of the ele- ments boron, silicon, titanium, zirconium, or hafnium individually or in admixture with one another in concentrations of the fluoro anions of, in all, 100 to 4,000 mg/L and which have a pH value of 0.3 to 3.5; subjecting the thus treated surfaces to machining, forming, or join- ing to one another or to parts of steel, galva- nized steel, or alloy-galvanized steel by bond- ing or by welding; and subjecting the machined, formed, or joined surfaces to a permanently corrosion-preventing conversion treatment.

Apparatus for Electrolytic Treatment of Strip U.S. Patent5,584,984. Dec. 17, 1996 EG. Pempera and M. Haentjes, assignors to Mannesmann AG, Dikseldorf, Germany

A method of electrolytically treating the surface of an elongated, continuous metal strip advanced longitudinally along a direc-

A process comprising cleaning an alu- minum can with an aqueous acidic cleaning solution comprising a surfactant compo- nent and then contacting the aluminum can with an aqueous lubricant and surface con- ditioner forming composition.

Aluminum tion of movement: U.S. Patent 5,584,946. Dec. 17, 1996 U. Karmaschek et al., assignors to Henkel KGA, Duesseldom Germany

A process for treatment of surfaces of alu- minum and its alloys comprising contacting

Two-Coat, One-Bake Coating Method U.S. Patent 5,585,146. Dec. 17, 1996 A. Uenaka and T Kuwajima, assignors to Nippon

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METAL FINISHING . SEPTEMBER 1997 115