groups; a curing agent havinggroups that are reactive with thefunctional groups; and a com­pound comprising at least onecarbamate group that is the reac­tion product of a hydroxyl groupthat is the result ofa ring-openingreaction between an epoxy groupand an organic acid group andcyanic acid or a carbamate group.

VIBRATORY ..NISHING PROCESSU.S. Patent 5,873,770. Feb. 23, 1999F. Hashimoto, assignor to TheTimken Co., Canton, OhioIn a workpiece having at least oneexterior surface, the improve­ments comprising the exteriorsurface having a predefined de­sired average surface roughnessobtained by subjecting to a vibra-

tory finishing process for a prede­termined processing time.

RECOVEIIY OP PAINT OVUlSPRAYU.S. Patent 5,873,945. Feb. 23, 1999R.R. Patzelt and T. Randazzo,assignors to Nortru Inc., Detroit

A method for recovering a volatileorganic material consisting essen­tially of carbonyl compounds fromsolvent-in-water emulsions de­rived from paint overspray treat­ment and capture systems.

PIIOTEC'mIE COAnN. PORZINCIfEROUS SURPACISU.S. Patent 5,873,952. Feb. 23, 1999J.R. Hall and T.J. Prescott,assignors to Henkel Corp., GulphMills, Pa.

A process of forming, over a spec­ified period of time, a protective

coating on one or more zinciferoussurface(s) by contacting with atleast a portion of a specified totalvolume of an aqueous liquid treat­ment composition comprising wa­ter, transition metal cations, andfluorometallate anions.

IlIOIlICHROMAnD COAnNG PORALUMINUMU.S. Patent 5,873,953. Feb. 23, 1999M.P. Schriever, assignor to TheBoeing Co., Seattle

An improved process for formingan oxide film cobalt conversioncoating exhibiting corrosion resis­tance and paint adhesion proper­ties on aluminum or aluminum al­loy comprising an oxide filmforming cobalt conversion solutioncontaining no triethanolamine con-

Ask for your FREE copyof our lalest calal09

SERF/LeoSpace-SaveFiltrationSystemsare just

that ... they save valuablespace in your plant, while providing

economical, full flow filtration tomaintain constant solution clarity and

purification.

• Non-metallic solution contact for compatibility with mostliquids, inclUding harsh chemicals at elevated temperatures.

• Flow rates to 6600 GPH

• Filter chambers accept depth wound, pleated, cleanablesleeve and carbon cartridges as well as cleanable bags.

F·217

DSERFILCO, LTD. .-"•• 1777 Shermer Road, Northbrook, IL 60062-5360 U.S.A.

847·559-17n. 800·323·5431. FAX: 847-559-1995Email: sales@serfilco.com. Web: http://www.serfllco.com

NC267 lorryCell for room 5. mechanical 09'1.NC367 lorryCell with built-in strnng bar.NC467 lorryCell wI duo Olr. built~n stirring barNC567 lorryCell wI heater. built-in stIlTing bar.NCU7 larryCell w/healer. duo a~. bu~I-ln stirrer

Order/nlormo/ion:

1- Concave walls to reproduce the shield cathode deposit,and shield anode corro ion.

2- Duo air manifolds for the anode and the cathode.3- Precise thermostatic heater; gla or titanium.

Suspended for easy cleaning and adding chemical.4- Fix position magnetic stirring pattern, built-in stirring bar.5- Built-in duo temperature indicator; and F scale.6- Thermometer and air pump holder.

QualifyShouldNoverBe A GuessingGame!

I/IIIIIYdill Corporation IhltpJ/www plateworld.comnarryk.htm I~13706 250lh Slreet, Jamaica Y 11422 (716) 481-6741 fax (716) 461-9659

Setting New Standards in 267 ml Hull Cell

Circle 041 on reader Information card Circle 071 on reader Information cardNovember 1999 105

sisting of a water-soluble cobalt-IIsalt; a water-soluble ammoniumsalt; a water-soluble inorganic com­plexing agent selected from thegroup consisting ofmetal nitrites; awater-soluble organic complexingagent selected from the group con­sisting of acetic acid, formic acid,ammonium formate, or a water­soluble metal formate; and a water­soluble oxidizing agent.

PROCUS POR PRODUCINGPAnrnID STU&. WlRIU.S. Patent 5,873,961. Feb. 23, 1999A. W. Bhagwat et al., assignors toThe Goodyear Tire & Rubber Co.,Akron, Ohio

A process for producing a high­strength filament for use in elasto­meric reinforcements comprising

heating a steel wire to a tempera­ture within the range of 850 to1,100aC wherein the wire is com­prised of a microalloyed high car­bon steel; continuously cooling theheated steel wire at a cooling rateof less than 60aC per sec until atransformation from austenite topearlite begins; allowing the trans­formation to proceed with an in­crease in the wire temperature re­sulting from recalescence toproduce a patented steel wire,wherein the increase in wire tem­perature within the range of 20 to80 aC; cooling the patented steelwire to ambient temperature; brassplating the patented steel wire toproduce a brass-plated wire; andcold-drawing the brass-plated steelwire to a diameter within the range

of 0.10 to 0.45 mm to produce ahigh-strength filament.

MDAL RICOnRY APPARATUSU.S. Patent 5,873,986. Feb. 23, 1999E.E. Thompson III et al., assignorsto CPAC Inc., Leicester, N. Y.

An apparatus for the recovery ofmetal from metal-laden fluids com­prising a first fluid circuit includinga first pump that circulates fluidwithin an annulus, the annuluscomprising an inner surface that iselectrically charged with one polar­ity; an outer surface that is electri­cally charged with an opposite po­larity; and the charges of the innerand outer surfaces inducing anelectrical current through the fluidas it circulates in the annulus, theelectrical current forcing metal dis-

standard and custom systems•••

Now yo.. tNt AM.4' ....t. ",... w4l.,"ow 4' yO.. w­W".o..t WOlIY''''4'0..t ,....'41MY11",11411011&

ISCHARBE

o PATENTED, HYBRID REVERSE OSMOSIS/CHEMICALPRECIPITATION PROCESS TECHNOLOGY

o ELIMINATES WASTE WATER DISCHARGEo REMOVES ALL METAL IONS, OTHER IMPURITIES

o PURIFIES RINSE WATER AS RECYCLES

o POSmVE RETURN ON INVESTMENTlDw-eost loan/lease plans available

Formore informationand free consultation,contact:BLUE SPRING CORPORATION

Voice: (361) 552-8898 • Fax: (361) 552-4393

• Extended freeboard• Full system enclosures• All stainless construction• Vapor zone super-heaters• Manual-reset safety circuit• Freeboard zone super chiller• Automated handling systems• Manual or power slide covers• Single and mUlti-stage systems• Vapor-watch monitoring system• Integral moisture control system• Sonicor IlBandscannerll series

sweep frequency ultrasonics

Sonicor offers a wide range of standard and custom-engi­neered vapor degreasing systems. All Sonicor degreasers aredesigned to minimize solvent emissions and assure full com­pliance with environment regulations. In addition to standardcompliance features. Sonicor systems are available with addi­tional control devices to further limit solvent emissions whilemaximizing productivity and reliability.

See us on the Internet at www.sonicor.com

Circle 095 on reader information card Circle 013 on reader information card

106 Metal Finishing