Stainless steel pickling without nitric acid

chloric acid as a sole acid, and subsequently rinsing the material. MULTILAYER COATING

U.S. Patent 5,840,372. Nov. 24, 1998 H.P. Rink et al., assignors to B A S F Lacke +Farben AG, MuensterHiltrup, Germany

A process for the preparation of a multilayer coating on a substrate surface comprising applying a pigmented aqueous basecoat, which comprises a polyacrylate resin and a crosslinking agent; forming a polymer film from the basecoat; applying a transparent topcoat to the resulting basecoat; and subsequently baking together the basecoat and topcoat, wherein the basecoat contains an aluminum pigment.

AGUEOUS C O A T I N G FOR C A N S

of water-thinnable coating compositions having precisely defined color shades.

U.S. Patent 5,840,384. Nov. 24, 1998 S. Noda et al., assignors to Kansai Paint Co. Ltd., Japan

An aqueous composition for coating the exterior surface of a can, comprising a water-soluble or water-dispersible reaction product prepared from 50 to 90 parts by weight of at least one resin having carboxyl functionality selected from acrylic resin and polyester resin; 10 to 50 parts by weight of epoxy resin; and a tertiary amine.

POLYESTER C O A T I N G S

U.S. Patent 5,840,827. Nov. 24, 1998 J.J. Zupancic et al., assignors to Morton International Inc., Chicago

Low molecular weight hydroxyfunctional polyesters for coatings. STAINLESS STEEL PICKLING W I T H O U T NITRIC A C I D

U.S. Patent 5,843,240. Dec. 1, 1998 C. Pedrazzini and P. Giordani, assignors to Novamax ITB S.r.L., Milano, Italy

WATER-THINNABLE COATING COMPOSITIONS

A pickling and passivation process for c h r o m i u m containing stainless steel comprising placing the material in a bath kept at 30 to 70°C having the following opti-

U.S. Patent 5,840,799. Nov. 24, 1998 B. Mayer et al., assignors to B A S F Lacke + Farben AG, MuensterHiltrup, Germany

A mixer system for the production

Powerful cleaning harmony the envir, MS 1 Shaker • Load parts, press a button and walk away • Good f o r the environment • Versatilecleans and buffs in one step • Minimum f l o o r space • Q u i e t operation • Call today! ." ;.:,] .....

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Metal Finishing

mal composition H2SO 4 from 30 to 150 g/L; Fe 3÷ at least 15 g/L; HF from 5 to 50 g/L; additives (emulsifters, wetting agents, polishing agents) and acid attack inhibitors approximately 1 g/L; a bath pH not higher t h a n 2.5; and an oxidizing agent suitable for maintaining the bath redox potential at values of at least 200 mV, said oxidizing a g e n t being selected from oxidized chlorine acids and salts thereof, peroxidized acids, such as persulfuric acid and salts t h e r e o f or a l k a l i n e p e r m a n g a nares.

PROTECTIVE C O A T I N G FOR ALUMINUM

U.S. Patent 5,843,242. Dec. 1, 1998 S.E. Dolan, assignor to Henkel

Corp., Plymouth Meeting, Pa. A process for improving the corrosion protection afforded to an underlying metal substrate selected from a group consisting of aluminum or any a l u m i n u m alloy containing at least 45% a l u m i n u m by an adherent primary coating containing cobalt oxide and aluminum oxide formed over the metal substrate comprising contacting with an aqueous sealing composition consisting essentially of water, dissolved v a n a d a t e anions, and dissolved counterions for the vanadate anions, containing not more t h a n 0.030 M in total of tungsten in any anionic form and containing at least 0.007 M of vanadium atoms from the v a n a d a t e anions; discontinuing the contact-

ing and drying at a temperature not greater t h a n 100°C. ELECTROLYTIC POLISHING APPARATOS

U.S. Patent 5,843,290. Dec. 1, 1998 Y. Tezuka et al., assignors to Sumitomo Metal Mining Co. Ltd.,

Tokyo A contactless apparatus for the electrolytic polishing of a blank for a lead frame, which comprises an electrolytic polishing t a n k having a first end and an opposite second end, a compartment containing a blank supply roll located adjacent the first end of the t a n k to convey a blank thereto, and a compartment containing a blank discharge roll located adjacent the second end of the t a n k to convey a treated blank away therefrom.

INDUSTRIAL POWER RECTIFIER SCR & SILICONAC & DC POWERSUPPLIES DESIGN, MANUFACTURE & REPAIR Plating Equipment, Plating Racks, Paint Racks, PCB Racks, Anodizing Racks, Teflon Tipped Thumb Screws, Anode Baskets, Anode Bags, Stainless Steel Baskets, Black Oxide Baskets, Lead and Carbon Anodes, Plating and Masking Tapes, Tanks, Tank Liners, Barrels and Waste Water Treatment. MATERIAL

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