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

ektmpkting equipment ??Single and multi-strand Reel to Reel

platq machines ??Selective plating modules for the

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Free Literature Available

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METAL FINISHING . SEPTEMBER 1997 115

Paint Co. Ltd., Osaka, Japan

A two-coat one-bake coating method, which comprises applying to a substrate an aqueous base coat composition and then applying a clear powder coating composition comprising an ep- oxy gmup-containing acrylic resin.

Prepaint Treatment for Polypropylene U.S. Patent 5,595,187. Dec. 17, 1996 H. Shinonaga and S. Sogabe, assignors to Sumitomo Chemical Co. Ltd., Osaka, Japan

A method for surface treating a polypro- pylene resin composition molded article, which comprises irradiating a molded arti- cle with ultraviolet light having an irradia-

tion wavelength of 300 nm or less, said molded article being obtained from a polypropylene resin composition.

Acidic Cleaner for Plastics U.S. Patenr5,585,340. Dec. 17, 1996 T1D. He/d, /I/, assignor to Henkel Corp., Plymouth Meeting, Pa.

An aqueous liquid concentrate that when diluted with 49 times its own weight of water forms a liquid cleaning composition that has a foam volume of not more than 25 ml from 150 ml of the composition at 60°C and that consists essentially of water and a component selected from the group con-

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sisting of hydroxycarboxylic and dicar- boxylic acids; 0.21 to 10 g/kg of nonionic surfactant; and 0.04 to 1.0 g/kg of a hy- drotroping component selected from the group consisting of the ammonium and alkali metal salts of sulfonates of toluene, xylene, and cumene.

Process for Mechanical Plating of Nickel Alloys U.S. Patent 5,597,006. Dec. 24, 1996 M. H. Shepherd and KS. Gasaway, assignors to Madison Chemical Co. Inc., Madison, Ind.

A coplating promoter composition for mechanically plating a tin- and nickel-con- taining coating on metal articles, compris- ing 1 to 30% insoluble nickel oxide, 5 to 50% platable tin compound, 10 to 45% acidity regulating agent, and 10 to 60% dispersant.

Hot-Dip Apparatus U.S. Patent 5,587,017. Dec. 24, 1996 S. Yamanaka and T Hashimoto, assignors to Sumitomo Metal industries Ltd., Osaka, Japan

An apparatus for producing a molten metal plated steel sheet comprising a mol- ten metal plating tank with one side wall being located at a delivery end at which a steel sheet fed through the plating tank emerges, a submerged sink roll disposed inthe plating tank for conveying the steel sheet; and a buffer member provided within the tank between the sink roll and the one side wall for decelerating melt flows coming from below the sink roll.

Cathodic Electrodeposition Paint U.S. Patent 5,587,059. Dec. 24, 1996 S. Yamoto et al, assignors lo Nippon Paint Co. Ltd., Japan

In a cathodic electrodeposition paint camp sition comprising a cationic film-forming epoxy resin and a crosslinker, said crosslinker is a blocked polyisocyanate, both dispersed in an aqueous medium containing a neutralizing agent, the improvement wherein the paint com- position further comprises an anticorrosively effective amount of a combination of a water- soluble cerium compound and either a polyva- lent metal phosphomolybdate or a copper com- pound.

Electrolytic Coloring of Aluminum U.S. Patent 5,587,063. Dec. 24, 1996 t? Kuhm et al, assignors to Henkel KGA, Duesseldorf, Germany

A process for the electrolytic alternating current coloring of anodized aluminum sur- faces, comprising providing an acidic col- oring bath substantially free from tin (II) ions and silver ions but containing copper (II) ions and an electrolyte additive se-

116 METAL FINISHING ?? SEPTEMBER 1997