copper or copper alloys compris- ing an oxidizing agent, which can oxidize the copper or copper alloy and is selected from cupric ion source compounds; an organic acid or an inorganic acid; a halide ion source compound; a polymer compound, which contains poly- amine or polyimine chains or a cationic group or both in the amount of 0.000001 to 1.0% by weight; and water.

PROCESS FOR TREATING TINNED

SURFACES

U.S. Patent 5,965,205. Oct. 12, 1999 M. Yoshida, assignor to Henkel Corp., Gulph Mills, Pa.

A process for treating a tinned metal surface in order to form a corrosion-protective, paint-adher- ent coating comprising bringing

the metal surface being treated into contact with an aqueous liq- uid coat-forming composition hav- ing a pH of not more than 6.0 and comprising water and 0.5 to 30 parts by weight of phosphate ions; 0.1 to 10 parts by eight of con- densed phosphate ions; and 0.1 to 20 parts by weight of water- soluble polymer molecules.

HOT-DIP COATING APPARATUS

U.S. Patent 5,965,210. Oct. 12, 1999 M. Tada et al., assignors to Kawasaki Steel Corp., Hyogo, and Mitsubishi Heavy Industries, Ltd., Tokyo

A hot-dip coating method in which a steel strip is coated as it is fed upwardly through a slit in a bottom of a coating tank, the im- provement comprising making a

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flow velocity of the molten metal uniform across a breadth of the strip by directing the molten metal through a flow restricting buffer as the molten metal enters the coating tank at the inlets.

ELECTROLESS COPPER PLATING

SOLUTION

U.S. Patent 5,965,211. Oct. 12, 1999 K. Kondo et al., assignors to Nippondenso Co., Ltd., Kariya, Japan

A process for formation of a cop- per plating film, which comprises immersing a material to be plated in an electroless copper plating solution of copper ions; a reducing agent; a pH-adjusting agent; a tri- alkanolmonoamine or a salt thereof in an amount sufficient to act as a complexing agent and ac-

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celerator; an iron ion compound selected from a group consisting of at least one of ferrous halide salts, ferric halide salts, ferrocya- nide compounds, and ferric cya- nide compounds as a reaction ini- tiator; and at least one compound selected from the group consist- ing of pyradazine methylpiperi- dine, 1,2-di-(2-pyridyljethylene, 1,2-di-CpyridylIethylene, 2,2’- dipyridylamine, 2,2’-bipyridyl, 2,2’-bipyrimidine, 6,6’-dimethyl- 2,2’-dipyridyl, di-2-pyridylketone, N,N,N’,N’-tetraethylethylenedi- ame, naphthalene, M-naphthy- ridine, 1,6-naphthyridine, tetra- thiafurvalene, cw,a,a-terpyridine, phthalic acid, isophthalic acid, and 2,2’-dibenzoic acid as an agent for effecting physical properties of the plating film.

AQUEOUS DISPERSIONS OF A TRANSPARENT POWDER COATING

U.S. Patent 5,965,213. Oct. 12, 1999 L. Sacharski et al., assignors to BASF Coatings AG, Muenster- H&-up, Germany

A method of coating vehicle bodies

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of sheet metal and/or plastic by applying a coating by means of electrostatically assisted high- speed rotation or pneumatic ap- plication wherein the coating comprises an aqueous dispersion of a transparent powder coating, consisting of a solid powder com- ponent A and an aqueous compo- nent B, wherein component A is a transparent powder coating comprising at least one epoxy group-continuing binder having a content of glycidyl-containing monomers of from 30 to 45%, and at least one crosslinking agent, and component B is an aqueous dispersion comprising at least one nonionic thickener; and further wherein the aqueous dispersion has a pH between 5.5 and 6.5.

COPPER- AND TIN-PLATED CONNECTOR

U.S. Patent 5,965,279. Oct. 12, 1999 N. Yu, Montmirail, France, assignor to Axon Cable SA, Montmirail, France

An electrical conductor made of copper-plated and tin-plated alu- minum.

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MECHOD FOR MEASURING CYANIDE

U.S. Patent 5,965,450. Oct. 12, 1999 N.P. Kelada, Glen Ellyn, Ill.

A system for measuring total cya- nide, dissociable cyanide, and complex cyanide in a sample com- prising photoillumination means for irradiating the sample and dissociating cyanides contained therein; means to carry to allow radiation from the photoillumina- tion means to cause dissociation of cyanides in the sample and a distillation section configured for distilling dissociated cyanides in the sample by heat generated by the photoillumination means; means for acidifying the sample; means to inhibit thiocyanate dis- sociation located between the pho- toillumination means and means to carry the sample; and measur- ing means for recovering cyanide and generating a recordable sig- nal indicative of the amount of cyanide in the sample.

AGUEOUS CLEANER

U.S. Patent 5,965,509. Oct. 12, 1999

M.C. Welch et al., assignors to BASF

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September 2000 117