strip as much of the metal material of the weapon barrel from the region to be pro- vided with the protective coating as corre- sponds to metal subsequently to be applied as the protective metal coating, and to thus form a recess; and, subsequently electrolyt- ically plating the protective metal coating to substantially replace the stripped quan- tity of metal and to substantially fill the recess.

Cyanide Destruction Process U.S. Patent 5,476,596. Dec. 19, 1995 PR. Kurek, assignor to UOe Des Plaines, 111.

A method of reducing the cyanide con- centration in an aqueous stream comprising oxidizing inorganic cyanides with an oxi- dizing agent selected from the group con- sisting of oxygen, ozone, and hydrogen peroxide, and concurrently hydrolyzing or- ganic cyanides under reaction conditions in the presence of a catalytically effective amount of a metal chelate supported on a metal oxide solid solution, where the metal chelate is selected from the group consist- ing of metal compounds of tetrapyridi- noporphyrazine, porphyrin, corrinoid mate- rials, and the phthalocyanines.

Coated Metal Fastener U.S. Patent 5,476,687. Dec. 19, 1995 W.L. Gabriel et al, assignors fo ///hois Tool Works Inc., Glenview, 111.

A process for coating a metal fastener, comprising providing a reservoir of a coat- ing composition that comprises a uniform mixture of a copolymer of an aromatic monomer and a monomer with an unsat- uration with carboxyl groups, selected from the group consisting of maleic acid, furmaric acid, and maleic anhydride, and a thermoplastic resin, uniformly dissolved within an organic solvent selected from the group consisting of aromatic solvents, ke- tones, chlorohydrocarbons, and mixtures thereof; dipping a metal fastener into the reservoir such that the composition is coated upon the metal fastener; and curing under atmospheric conditions at approxi- mately ambient temperature.

Noble Metal Coated Substrates U.S. Patent 5,476,6&J& Dec. 19, 1995 M.J. Ostolski, New Cifx N.Y.

A process for plating a coating of a noble metal onto a non-noble metal sub-

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strate material, comprising preparing a starter aqueous plating solution containing an amount of free ions of a noble metal selected from the group consisting of sil- ver, gold, platinum, palladium, iridium, rhodium, ruthenium, and osmium; dividing the starter plating solution into a plurality of portions; preparing a plurality of indi- vidual plating solution baths: immersing an amount of an active non-noble metal sub- strate material to be plated into one of the individual plating solution baths such that the temperature is inversely related to the oxidation potential of the non-noble metal substrate material being plated; separating the intermediate plated substrate material from the depleted plating solution bath; rinsing with a first series of water rinses; repeating the steps until all of the individ- ual plating solution baths have been uti- lized; rinsing the final plated substrate ma- terial at least once with a second series of rinses, including rinses with water, an acid, and an alcohol; further rinsing with a third series of rinses, including rinses with water, and an alcohol; and drying to produce a final noble-metal-coated active non-noble metal substrate material product.

Jaynor’s Gold Digger: Makes solid gold for 25a an ounce.

No more refining of solutions or burnable resins. Just send metal. Like all great ideas, the Jaynor Precious Metal Recovery System-the Gold Digger-is simplicity itself. instead of using bulky resins, the 38-lb TV-sized Gold Digger attaches to your dragout tank and plates the metal out on a cathode panel. The metal is 80% to 90% pure. Start mining solid gold! JAYNOR can design and build a custom Gold Digger to fit your specific needs.

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110 METAL FINISHING . SEPTEMBER 1996