Chromate for Aluminum Alloys US. Patent 5,26&X2. Dec. 7, 1993 L.R. C&son, assignor to Henkel Corp., Plymouth Meeting, Pa.

A composition and process for forming improved, noncracking chromate conver- sion coatings.

Eiectroless Nickel Bath U.S. Patent5,269,638. Dec. 14, 1993 M. lnoue et al., assignors to Dip/ Chemicals Co. Ltd., My0

An electroless plating solution compris- ing nickel ion, a chelating agent for nickel ion, a reducing agent for nickel ion, a soluble salt of a condensate of an arylsulfo- nit acid with formalin, and thiodiglycolic acid.

Regeneration Process for Trivalent Chromium Baths U.S. Pateti5,269,905. Dec. 14, 1993 B.C. Reyno/ds, assignor to Elf Afochem North America Inc., Philadelphia

A process to regenerate a plating bath comprising a plating tank having therein trivalent chromium cations and containing

contaminating amounts of hexavalent chro- mium ion, which comprises the steps of contacting the bath with a cationic ion- exchange resin to regenerate the bath, and recycling the regenerated plating bath to the plating tank.

Giycidyi-Modified Acrylic Powder Coating U.S. Patent5,270,416. Dec. 14, 1993 P.A. Toman et al., assignors to Ferro Corp., Cleveland

A thermosetting powder coating compo- sition containing a low molecular weight glycidyl-functional copolymer binder.

Electrostatic Coating Apparatus U.S. Patent 5,271,569. Dec. 21, 1993 RD. Konieczynski et al, assignors to Nor+on Cop., W&lake, ohi0

An apparatus for dispensing electrically conductive coating material, comprising at least one coating dispenser; a number of holding means each adapted to receive a different colored material from a respective source of coating material; color changer means located between the holding means and said at least one dispenser, a high

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voltage electrostatic power supply; and means for electrically isolating each of the holding means from their associated sources.

Chromium-Plated Engine Valve U.S. Patent5,271,823. Dec. 21, 7993 S. R. Schachameyer et al., assignors to Eaton Corp., Cleveland

A method for providing a wear-resistant chromium coating on a metallic internal combustion engine valve stem, including electrodepositing a coating made solely from trivalent chromium ions and devoid of hexavalent chromium ions on the valve stem and heating to a temperature of at least 150’F for at least 30 min.

Epoxy Eiectrocoat U.S. Pafenf 5,272,189. Dec. 21, 1993 A/. L. Kaufman, ass&nor to PPG hdusfries Inc., Pittsburgh

A reduced yellowing electrodepositable coating composition, comprising an active hydrogen-containing ionic resin, and a curing agent, which contains blocked isoc- yanate and other groups

Jaynor’s Gold Digger: Makes solid gold for 2S an ounce.

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88 METAL FINISHING . JANUARY 1995