Blade and Wheel Plate for Blast Cleaning U.S. Patent 5476,412. Dec. 19, 1995 E.J. Stoltz, assignor to Blast C/caning Products Ltd., Oakville, Canada

A method of releasably connecting a blade to a single wheel plate of a centrifu- gal blasting wheel without using a separate stop-member to prevent outward radial movement of the blade.

Dry Barrel Finishing Machine U.S. Patent 5,476,415. Dec. 19, 1995 K. Nishimura ef al., assignors to Sinfobrator Ltd., Aichi, Japan

A dry barrel finishing machine, compris- ing a base; a barrel mounted on the base for accommodating a mass consisting of a me- dia and workpieces; and a driving means for flowing the mass in the barrel.

Surface Preparation for Bonding Titanium U.S. Patent 5,476,552. Dec. 19, 1995 W.C. Tucker et a/., assignors to The USA as represented by the Secretary of the Navy, Washington, D. C.

A method for preparing a titanium or titanium alloy surface comprising grit blasting desired portions of the surface; and applying an acid wash primer comprising an alcohol-zinc-chromate-phosphoric acid mixture to the desired portions, said grit blasting and primer applying steps improv- ing the bondability of the titanium or tita- nium alloy surface, said primer consisting essentially of 90% by weight alcohol soh- tion, 5% by weight zinc chromate, and 5% by weight phosphoric acid.

Electrolytic Etching of Molybdenum U.S. Pafenf 5,476,575. Dec. 19, 1995 D.J. Brophy et a/., assignors to IBM Corp., Armonk, N.Y.

A method of etching a molybdenum foil having a mask area, the method comprising placing a masking pattern onto the mask area of the molybdenum foil, the masking pattern including bare regions and coated regions; disposing a cathode at a fixed in- terelectrode distance from the mask area; filling a space between the mask area and the cathode with a liquid electrolyte com- prising a 2M-5M aqueous solution of so-

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dium nitrate; inducing the electrolyte to flow over the mask area; providing a rela- tively positive voltage to the molybdenum foil and a relatively negative voltage to the cathode, such that the molybdenum foil is electroetched in the bare regions; and maintaining the relatively positive molyb- denum foil voltage and the relatively neg- ative cathode voltage until the molybde- num foil is etched through to provide openings.

Device for Electrolytic Deposition of Metal on Strip U.S. Patent 5476,577. Dec. 19, 1995 H.J. May lserlohn and R. Schneftler, Hagen, both of Germany

A device for the electrolytic deposition of metal on a cathode formed by a metal strip, comprising two platelike or rodlike anodes arranged parallel to each other with a gap therebetween; the metal strip being guided through the gap in an electrolyte adopted to be between the two anodes; two edge masks each having two shanks for enclosing in a screening way the edge zone of the metal strip and set up in the gap transversely to the direction of the strip;

Circle 066 on reader information card

108 METAL FINISHING ?? SEPTEMBER 1996

and the shanks of each edge mask rest against the anodes with elastic prestress.

Apparatus for Electroplating U.S. Patent 5,476,578. Dec. 19, 1995 J.L. Forand et al., assignors to Electroplating Technologies Ltd., Northampton, Pa.

An improved arrangement for electro- lytic coating of an elongated flexible me- tallic substrate comprising means to pass a longitudinally extended cathodic work- piece having at least one surface to be coated through containment means for a body of electrolytic solution containing metallic ions to be plated out upon and bathing such surface to be coated; an anode mounted closely adjacent the pass line of the cathodic workpiece within the contain- ment means in contact with the electrolytic solution; at least one elongated resilient narrow surface contact dielectric means ar- ranged generally transversely of the longi- tudinally extended cathodic workpiece to resiliently contact the surface to be coated of the cathodic workpiece along an ex- tended narrow contact interface between the surface of the workpiece and the resil- ient narrow surface contact dielectric

means while submersed in the body of electrolytic solution, means to move the longitudinally extended cathodic work- piece past the resilient narrow surface con- tact dielectric means; and means to replen- ish electrolytic solution within the body of solution to prevent the body of electrolytic solution from becoming depleted of coat- ing metal ions at the electrolyte-cathode interface.

Electroplating a Nonconductor U.S. Patent5,476,580. Dec. 19, 1995 C.E. Thorn et a/., assignors to Elecfrochemicals Inc., Maple Plain, Minn.

A method for electroplating a conduc- tive metal layer onto a substrate including a conductive metallic surface and at least one nonconductive through-hole surface, com- prising providing a liquid dispersion of car- bon comprising from 0.1 to 20% by weight electrically conductive carbon having a mean particle size within the range from 0.05 to 50 microns, from 0.01 to 10% by weight of a water-dispersible binding agent for binding to the carbon particles, and an aqueous dispersing medium: applying the liquid dispersion to the conductive metallic

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surface and to the nonconductive through- hole surface, forming a coating thereon; separating substantially all of the aqueous dispersing medium from the carbon of the coating; after the separating step, micro- etching the conductive metallic surface and the nonconductive through-hole surface; and electroplating a substantially continu- ous metal layer over the carbon deposited on the nonconductive through-hole surface.

U.S. Pafent5,476,581. Dec. 19, 1995

Wear-Resistant Coating for a

H. Reckeweg et al., assignors to Rheinmefall GmbH, Ratingen, Germany

Weapon Barrel

A method of producing a metal weapon barrel having a wear-resistant metal inner protective coating applied, by an electro- lytic process, to the region of a chamber of the weapon barrel and of an adjoining, thermally highly stressed caliber portion of the weapon barrel, the method comprising providing a weapon barrel prefabricated true to caliber; electrolytically polishing an inner surface of the weapon barrel in the region of its chamber and of the adjoining, thermally highly stressed caliber portion to

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METAL FINISHING . SEPTEMBER 1996 109