Black No-Rinse Conversion Coating U.S. Patent5,470,673. Nov. 28, 1995 E.A. Rodzewich, assignor to Befz Laboratories Inc., Trevose, Pa.

A method of forming a black conversion coating on surfaces of aluminum and its alloys, comprising coating the surface with a coating solution having a pH below 7 consisting essentially of 0.01 to 0.20% hexavalent chromium; 2.0 to 10% acrylic/ itaconic modified styrene butyl acrylate polymer resin (as solid); 0.5 to 3.0% car- bon black pigment; 0.2 to I .O% fluoacid; a thickening agent selected from the group consisting of guar gum and xanthan gum and drying the coating on the surface with- out rinsing; and optionally a nonionic dis- persant and/or a slow evaporating coales- cent.

Hard Anodic Coating for Magnesium Alloys U.S. Patent 5,470,664. Nov. 28, 1995 D. E. Bartak et al., assignors to Technology Applications Group, Grand forks, ND.

.4 magnesium-containing article offering improved corrosion and abrasion resis- tance, the article comprising a magnesium- containing substrate coated with a first layer containing a continuum of magne- sium fluoride, magnesium oxide, magne- sium oxofluoride, and silicon oxide.

Architectural Material Coating U.S. Patent 5,470,667. Nov. 28, 1995 J.F: Carey and M. Zamanzadeh, assignors to The Louis Be&man Co., Stubenville, Ohio

.4 metal strip unwound from a roll of strip and coated in a continuous hot dip process forming a coating with a highly corrosive-resistant, two-phase tin-zinc col- ored metallic coating, said coating com- prising at least 65% zinc, at least 15% tin and at least 0.01% metallic stabilizer wherein said stabilizer is a metal selected from the group consisting of bismuth, an- timony, and mixtures thereof.

Electroplating of Superconductor Elements U.S. Patent 5,470,820. Nov. 28, 1995 R.L. Hauser et al., assignors to Hauser Chemical Research Inc., Boulder, Co/o.

A process for concurrent electroplating of yttrium, barium, and copper elements from aqueous solution onto an electrically conduc- tive substrate comprising dissolving com- pounds of the elements in water containing complexing agent and adjusted to a pH of 5 or less, said complexing agent selected from the group consisting of picolinic acid, ethylened- amine-N,N[SA]-diacetic acid, diethylenetr-

amine pentaacetic acid, 1,3diamino-2-hydrox- ypropane-N,N,N[SA],N[SA]-tetraacetic acid, nitrilotriacetic acid, triethylenetetra-amine hexaacetic acid, N-(2-hydroxyethyl)ethyl- enediamine triacetic acid, 1 $acetonedicar- boxylic acid, 2-nitrobenzoic acid, or a salt thereof; inserting an anode and a cathode into the solution; wherein the cathode comprises the substrate; and creating an electrical po- tential at -0.5 V or less with a current density of at least I5 mA/cm’ to cause electrodepo- sition of the elements onto the cathode.

Water-Based Acrylic Coating U.S. Patent 5,470,908. Nov. 28, 1995 D.L. Schmidt et al, assignors to The Dow Chemical Co., Midland, Mich.

A composition comprising at least 10% by weight of water and 0 to 95% of a water-compatible polymer having at least two pendant carboxylate groups; 1 to 60% of a different polymeric polycarboxylate, which has at least two pendant carboxylate groups and at least one internal amide, thioamide, urea, thiourea, biuret, dithiobi- uret, or urethane group; and 2 to 70% of a polyfunctional crosslinking agent having

ionic or potentially ionic moeity counter ions capable of reacting with the carboxy- late groups.

Paint Pump U.S. Patent 5,472,318. Dec. 5, 1995 PL. Frank et a/., assignors to Wagner Spray Tech Corp., Minneapolis

A rupture disk pressure relief assembly for a piston-type paint pump.

Process for Cleaning Aluminum and Tin U.S. Patent5,472,512. Dec. 5, 1995 V.A. Gober and D.A. Raney assignors to Man-Gill Chemical Co., C/eve/and

A process for washing an aluminum or tin container, which comprises using an aqueous alkaline cleaner containing 20 to 75% by weight of at least one inorganic base, 1 to 30% by weight of at least one cationic surfactant, which is a quatemary ammonium compound, and water; rinsing; and drying.

KLN Supplies’ new Graystone Lining offers many advantages over ordinary lined tanks. Graystone has no seams, therefore, there is no chance of failure due to improper sealing. Also, because there are no seams, there is no chance of cutting through a seam when cleaning a tank or removing parts...Graystone is bonded at high temperature to the steel after proper treatment. This limits undercutting from chemicals if the liner integrity is ever compromised. Graystone is patchable “on-site” and can be heat welded.

If your KLN “Graystone” lined tank should fail during the 2-year period start- ing with the date of delivery, KLN at our option will repair/replace or issue credit for the cost of the tank. Call for details.

At your request we can supply you with references of current Graystone Tank own- ers. We hope you will be next to join this growing ownership of Graystone lined tanks.

Looking forward to hearing from you...

1273 Reading Ave., Boyertown, PA 19512 800-605-2255 ??Fax 610-367-7966

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METAL FINISHING ?? SEPTEMBER 1996 101