and second sensors to monitor the amount of particles detected at the input and output of the wet scrubber; a liquid regulator re- sponsive to the controller for ad- justing the amount of liquid ap- plied to the input of the wet scrubber; and adjusting means in the wet scrubber responsive to the controller for controlling the ve- locity of the airflow through the wet scrubber.

A method of electroless plating a nickel-phosphorus alloy on a sub- strate comprising furnishing a

ELECTROLESS PlATlNG METHOD U.S. Patent 6,093,453. July 25, 2000 J. Ang, assignor to Aiwa Co., Ltd., Tokyo

plating bath solution including nickel and phosphorus ions in a plating bath tank; positioning a plating bath tank in an outer tank holding a heating solution having a boiling point higher than the boiling point of water; and im- mersing the substrate in the plat- ing bath solution in the plating bath tank.

PLATING SEMICONDUCTORS

A method to selectively electro-

U.S. Patent 6,093,647. July 25, 2000 A.S. Yu and P.J. Steffan, assignors to Advanced Micro Devices Inc.,

plate conductive material into

Sunnyvale, Calif

trenches.

PICKLING PLANT U.S. Patent 6,096,137. Aug. 1, 2000 K. Mabuchi et al., assignors to Hitachi, Ltd., Tokyo

A method of controlling a pickling plant having a tank containing acid solution, through which a steel strip is passed comprising calculating at least one of a con- centration of the acid solution, a concentration of iron in the acid solution, and a descaling rate of the steel strip, at respective posi- tions in the pickling tank, thereby providing calculation results at the respective positions; and con- trolling at least one of concentra- tion of a supply acid, which is sup- plied into the pickling tank; amount of supply acid added to

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76 Metal Finishing

the pickling tank; temperature of the supply acid; a line speed of the steel strip; and temperature of the steel strip just prior to entering the pickling tank.

COATING HAVING THE APPEARANCE OF BLACK CHROME

U.S. Patent 6,096,426. Aug. 1, 2000 S. Mokerji, assignor to MascoTech Inc., Taylor, Mich.

An article having on at least a portion of its surface a multilayer coating comprising a layer com- prised of polymeric material di- rectly disposed on at least a por- tion of the surface of the article; a nontransparent layer comprised of chrome and nickel alloy directly disposed on the layer comprised of polymeric material; and a layer comprised of acrylic directly dis-

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posed on the layer comprised of chrome and nickel alloy.

WIPE SOLVENT

U.S. Patent 6,096,700. Aug. 1, 2000 J.D. Weir and J. Swiderski McLaughlin, assignors to Northrop Grumman Corp., Los Angeles, Calif:

A wipe solvent composition for cleaning a metal substrate and for depositing on the cleaned sub- strate a residue consisting essen- tially of a polyfunctional coupling agent, which is bonded to the metal substrate and is bondable to an organic coating to be applied thereover, said composition con- sisting essentially of 95 to 99.9% by volume of an environmentally- acceptable volatile organic sol- vent having a composite vapor pressure below about 45 mm Hg

and 0.1 to 5%, by volume of 3-gly- cidoxypropyltrimethoxy silane polyfunctional coupling agent having a bonding affinity for a

metal substrate surface cleanable by said solvent and for an organic coating applied to said surface.

AUTODEPOSITABLE DISPERSION OF

EPOXY RESINS

U.S. Patent 6,096,806. Aug. 1, 2000 B.L. Mueller and E.J. Siebert, assignors to Henkel Corp., Gulph Mills, Pa.

An autodepositing liquid composi- tion comprising water and at least 1.0% of dispersed or both dis- persed and dissolved film forming polymer molecules; an emulsify- ing agent; and a dissolved acceler-

ator component.

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July 2001 77