face: a magnet arranged on the back side of the target for generating a closed loop mag- netic field in front of the target and for producing a magnetic field distribution.

Metalking Process U.S. Patent 5770,032. June 23, 1998 FN. Cane, assignor to Fidelity Chemical Products Corp., Newark, N.J.

In a process for metallizing a surface of a substrate wherein the surface has been cleaned. the improvement comprising sen- sitizing the cleaned surface by contact with an aqueous solution consisting of a stan- nous salt, a precious metal salt, and a source of chloride ions consisting of a salt selected from the group consisting of so- dium chloride, potassium chloride. and mixtures thereof.

Method for Recovery of Heavy Metal From Wastewater U.S. Patent 5,770,090. June 23, 1998 T: Lewis, 111, New Alexandria. Pa.

A method for reclaiming heavy metal from wastewater comprising adjusting the pH to a range between 2 lo 9; passing the wastewater through a bed of pretreated ad- sorption material; adsorbing the heavy metal present in the wastewater onto the surface of the adsorption material; monitor- ing the pH of the effluent stream exiting the bed of adsorption material to evaluate the capacity of the bed to adsorb the heavy metal while the bed remains on line: pass- ing an acid stripping solution through the bed of adsorption material to strip the heavy metal from the surface of the adsorp- tion material; passing the stripping solution containing the heavy metal to an electro- lytic recovery unit: electrolytically depos- iting the heavy metal from the stripping solution onto a cathode terminal in the electrolytic unit: recovering the heavy metal deposited onto the cathode terminal; and reusing the retained stripping solution in subsequent cycles of stripping heavy metal from the surface of the adsorption material.

Polishing Agent U.S. Patent 5,770.095. June 23, 1998 Y Sasaki et al., assignors to KK Toshiba. Kawasaki. Japan

A polishing method comprising forming a film made of material containing a metal as a main component over a substrate ha\,- ing depressed portions on a surface thereof so as to fill the depressed portions with the film: and polishing by a chemical-mechan- ical polishin! method using a polishing agent contammg a chemical agent and an etching agent. said chemical agent being responsible for forming a protection film on the surface by reacting with the material containing a metal as a main component,

and the etching agent being for etching the material containing a metal as a main com- ponent; thereby forming a conductive film in the depressed portions; wherein said metal is copper or a copper alloy and the etching agent includes either aminoacetic a’cid or amidosulfuric acid, an oxidizing agent, and water.

Composition for Polishing Titanium U.S. Patent 5,770,103. June 23, 1998 H-M. Wang et al., assignors lo Rode/ Inc.. Newark. Del.

A composition, which is an aqueous slurry useful for the chemical-mechanical polishing of titanium substrates, compris- ing water, submicron abrasive particles, an oxidizing agent, and a mono-, di-. or tri- substituted phenol. wherein at least one of the substituted functional groups is polar.

High Solids Coating Composition U.S. Patent 5770,268. June 23, 1998 M.C. Kuo et al., assignors to R.J. Tower Corp., Grand Rapids, M&I.

A method for producing a coated member including a substrate of corrodable material and a hard, moisture-resistant coating on the substrate comprising preparing a coating of a polyester in a concentration of 5 to 40% by weight of the composition, the polyester hav- ing hydroxy functional groups, a functional polyol compound in a concentration of 5 to 40%. a cycloaliphatic epoxy compound in a concentration of about 35 to 80%. and a themral curing catalyst of 0.1 to 2% by weight effective to cure the epoxy com- pound. polyester, and functional polyol com- pound to form the coating; dipping the sub- strate into a liquid composition; withdrawing the substrate so that a continuous coating ot the liquid remains on the substrate: and ther- mally curing.

Effect Paint U.S. Patent 5,770,299. June 23. 1998 F. Dannenhauer and K. Holdik, assignors to Mercedes-Benz AG Sfutfgart, Germany

A pigment-containing effect paint. said pigment imparting a color effect to the paint that dcptnds on the viewing angle and comprising pigment particles formed by fracturing a wiped and cross-linked

BLAST AWAY POLLUTION! with ALDOA’S double barrelled combination of

NOVALYTE

) 421 & 421 ZDLP: The best cyanide-free zinc systems in use today ) 370: A neutral cadmium sulfate plating process (barrel or rack) ) FE, COZ, NIZ, & BR: Cyanide-free zinc alloys of iron, cobalt, nickel

& copper plating

AQUATION

) AC Series: Alkaline emulsion breakers ) PW Series: Removes metal from rinse waters ) EB Series: Soluble oil emulsion breakers ) CA Series: Coagulants and flocculants ) 350-H: An organic compound for treating effluents with heavy metal

content and complexing agents in strong alkaline solutions.

ALDOA COMPANY L 12727 Westwood Ave.

Detroit, MI 48223-3433

Or reach us through: IDEIAL Chemical & Supply co. P.0. Box 18698 Memphis, TN 38181-0698 l-800 232-6776

Circle 006 on reader information card

METAL FINISHING l NOVEMBER 1998 121

polymer film, said pigment particles com- prising marked pigment particles, which carry a recognizable marking. that enables the object painted with the pigment-con- taining effect paint to be identified.

Cathodic Electrodeposition Paint U.S. Patent 5,770,642. June 23, 1998 H. Kanato et al., assignors to Nippon Paint Co. Ltd., Osaka, Japan

In a cathodic electrodepositon paint com- prising a mixture of a cationically modified epoxy resin and a blocked polyisocyanate crosslinker dispersed in an aqueous medium containing a neutralizing agent, the improve- ment wherein the cationically modified ep- oxy resin has at least one oxazolidone ring in the molecule and a T, ranging between 10 and 35°C and the blocked polyisocyanate crosslinker is a bicycloalkane diisocyanate or isophorone diisocyanate or a dimer, trimer, or polyhydric alcohol adduct thereof.

Spray Gun U.S. Patent 5,772,1X June 30. 1998 E.R. Ho/t, Rochesfer Hills, Mich.

A recirculating paint system having an improved spray gun.

Precision Deep Peening with Mechanical Indicator U.S. Patent .5,771,729. June 30, 1998 PG. Sai/ey and D.D. Dunkman, awgnors to Genera/ Nectric Co., Cinonnati

An apparatus for producing compres- sive stress in a component surface com- prising means to control positioning of a contact area of the component surface: at least one indenter element fixtured to contact the component surface and cause an indentation at the contact area; mea- surement means to measure force of the at least one indenter element as the at least one indenter element contacts the contact area; and control means to con- trol force of the at least one indenter element at the contact area.

Expandable Painting Wagon U.S. Patent 5,772.233. June 30, 1998 G.R. Papendick, assignor to Decoma lnfernational Inc., Canada

Now you can Eliiinate Racking of Semi-Conductors, Electronic Parts etc. by Barrel Plating with CM Catho-Spheres. Balls are reuseable- designed for all types of metal.

l Completely Copper Plated l Contains No Lacquer l Every Ball is Perfectly Round-Has No Holes l Balls are Lightweight Easily Sifted Out CMC Plastic Balls make barrel plating of small parts possible-even flat discs and interlocking items! Because CMC Plastic Balls are copper plated, they can easily be mixed with other items to be plated or burnished. The balls are not lacquered and therefore are conductive, yet CMC Plastic Balls are so Ii ht in wei ht that sifting is no problem at all. C 9 C Plastic % alls pay for themselves because they can be reused as well as refined for the gold or other precious metals used in plating.

B Fewer Rejects b Shorter Plating Time ) Stabilized Bath b Reduced Liability p Bath Life Extended

Virtually Forever b Minimal Operating

Requirements

REASCO Modular Ion Exchange

l Heavy Metal Recovery l Rinse Water Recovery l Bath Purification l Emuent Polishing l D.I. Water

‘or Information On Design, I Sales, Or Possible ?epresentafion, Confact

PLASTIC METHODS CO. 20 West 37th St., 7th Flr. l New York, NY 10018

Phone: 212-695-0070 l Fax: 212-967-5015 E-mail: plasmetco@aol.com

3ECOVERY ENGINEERING 81 SALES COMPANY ?O. Box 297, Arvada, Colorado 80001-0297 ‘HONE: (303) 292-5702 FAX: (303) 292-5717

Circle 018 on reader information card Circle 093 on reader information card

A painting wagon for carrying a plural- ity of components to be painted and trans- lating the plurality of components through a painting facility.

Passivation Composition for Galvanized Metal U.S. Patent $772,740. June 30, 1998 J. Ouyang and W.L. Harpel, assignors fo BetzDearborn Inc., Trevose, Pa.

An aqueous, substantially chromium free composition for passivating a galva- nized metal surface comprising from 0.5 to 50% phosphoric acid, 0.1 to 5% boric acid. and 0.1 to 2076 of a paraffin wax having a melting point of 90 to 200°F.

Roll Coater for Edges U.S. Patenf t;, 772,762. June 30, 1998 U. Hanifzsch, assignor to Firma Theodor Hymmen, Bielefeld, Germany

An apparatus for application of coating color on a profiled edge or straight edge area of a workpiece comprising a motor- driven applicator roll supported on a shaft.

Chromic Acid Purification l Lower Power Use

122 METAL FINISHING l NOVEMBER 1998