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ing, comprising a powder-spray module having a substantially vertical rotary shaft carrying an impeller at a lower end of the shaft, a vertically movable sleeve sur- rounding in spaced relationship the rotary shaft and providing an air passageway in communication with the impeller, and a nonrotatable nozzle assembly supported by the module and constructed and arranged to provide and transport a stream of electro- statically-charged powder downwardly to the center of the impeller. Zinc Phosphate Process U.S. Parent5,399,205. Mar. 21, 1995 ‘I: Sobata et al., assignors to Nippon P&f Co. ltd., Osaka, Japan A method for forming a zinc phosphate coating on a metal surface containing alu- minum, comprising contact with a treating solution; passing the treating solution to an external bath; adding a simple fluoride to the treating solution in the external bath thereby precipitating aluminum ions in the external bath; separating the precipitated aluminum from the treating solution; and returning the treating solution from which the precipitated aluminum has been sepa- rated to the treating bath; wherein the treat- ing solution is adjusted in concentration so as to contain the simple fluoride in a con- centration range of 200-300 mg/L. Conversion Coating for Aluminum U.S.Patent5,399,210. Mar 21, 1995 R.N. Miller, Ga., assignor to Lockheed Corp., Calabasas, Calif. A process for producing a corrosion- resistant chemical conversion coating on aluminum and aluminum alloys comprising subjecting a cleaned, degreased, and deox- idized aluminum to an alkaline solution containing sodium molybdate, sodium ni- trite, and sodium metasilicate. Chromating Treatment U.S. Pafent5,399,209. Mar. 21, 1995 A. Suds and T: Ogina, assignors to He&e/ Corp., Plymouth Meeting, Pa. A method for the chromate treatment of metal surfaces by contact with an aqueous acidic composition consisting essentially of 4.0 to 51.0 g/L of hexavalent chromium; 6.0 to 38.0 g/L of trivalent chromium; 0.5 to 97.0 g/L of phosphate ions; 0.01 to 2.90 M of a component selected from the group consisting of sulfate ions, nitrate ions, flu- oride ions, and mixtures thereof; and 0.003 to 0.85 M of a component selected from the group consisting of cations of copper, co- balt, nickel, tin, iron, and lead and mixtures thereof, wherein the trivalent chromium/ hexavalent chromium weight ratio is in the range 0.2 to 1.4. Magnetron Sputtering Apparatus U.S. Patent 5,399,252. Mar. 21, 1995 M. Scherer et al, assignors to Leybold AG, Hanau, Germany Apparatus for coating a substrate by magnetron sputtering, comprising an evacuable coating chamber, at least one magnetron cathode in the coating chamber; a target associated with each cathode, com- prising an oval ring of material to be sput- tered; bar means of stainless steel including outer bar means surrounding the oval ring and inner bar means located centrally of the oval ring; and insulating means between the bar means and the cathode, said stain- less steel plates being electrically grounded. BY SCHAFfNER$ Nii Buffing (Lime) - Stainless Steel Compound - Aluminum * 4 Compound - Chrome Cdoring Roqe - Green Rouge - Plasticv 4 Compound - Emery Cake - Jeweler’s Rouge - Grease Stick - f 4 Abras-Ease Abrasive Belt Lubricant -.All ferrousand non- $ 4 ferrousbutring compounds, Bar, Spray,or Paste. 4 Schaffner Metal Center Aircooled @ias type) Buffs - Bias $ 4 Cloth and S&&Bias Sisal, Treated or Untreatad - Satinizer $t Buffs - Rubber Sectional Contact Wheels - Cloth or $ 4 Abrasive Segment Buffs - Abrasive Bias Type - Extra Life 4 Bias Type - Coloring Buffs.(lhe above in 3’ , S, 7’ or 9’ten- ’ 4 ters, 6’diam. through 24” diam.) All full disc and piece buffs. 4 Write, wire, oiphone today for information andprices. $ t SCHAFFNER HEADQUARTERS Pittsburgh, PA 15202 t (412) 761-9902 ??FAX: (412) 761-8998 t LJF-G PI ANTS $ A Emsworth, PA ??Jackson, MS $ ??Ideal OEM chemical processing uses * Vertical I horizontal, centrifugal & magnetic drive pumps ??CPVC, polypropylene, PVDF & stainless steel construction ??Pressures to 170 TDH ??Flows to 182 GPM n METAL FINISHING . OCTOBER 1995 97

Magnetron sputtering apparatus

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ing, comprising a powder-spray module having a substantially vertical rotary shaft carrying an impeller at a lower end of the shaft, a vertically movable sleeve sur- rounding in spaced relationship the rotary shaft and providing an air passageway in communication with the impeller, and a nonrotatable nozzle assembly supported by the module and constructed and arranged to provide and transport a stream of electro- statically-charged powder downwardly to the center of the impeller.

Zinc Phosphate Process U.S. Parent5,399,205. Mar. 21, 1995 ‘I: Sobata et al., assignors to Nippon P&f Co. ltd., Osaka, Japan

A method for forming a zinc phosphate coating on a metal surface containing alu- minum, comprising contact with a treating solution; passing the treating solution to an external bath; adding a simple fluoride to the treating solution in the external bath thereby precipitating aluminum ions in the external bath; separating the precipitated aluminum from the treating solution; and returning the treating solution from which the precipitated aluminum has been sepa-

rated to the treating bath; wherein the treat- ing solution is adjusted in concentration so as to contain the simple fluoride in a con- centration range of 200-300 mg/L.

Conversion Coating for Aluminum U.S. Patent 5,399,210. Mar 21, 1995 R.N. Miller, Ga., assignor to Lockheed Corp., Calabasas, Calif.

A process for producing a corrosion- resistant chemical conversion coating on aluminum and aluminum alloys comprising subjecting a cleaned, degreased, and deox- idized aluminum to an alkaline solution containing sodium molybdate, sodium ni- trite, and sodium metasilicate.

Chromating Treatment U.S. Pafent5,399,209. Mar. 21, 1995 A. Suds and T: Ogina, assignors to He&e/ Corp., Plymouth Meeting, Pa.

A method for the chromate treatment of metal surfaces by contact with an aqueous acidic composition consisting essentially of 4.0 to 51.0 g/L of hexavalent chromium; 6.0 to 38.0 g/L of trivalent chromium; 0.5 to 97.0 g/L of phosphate ions; 0.01 to 2.90

M of a component selected from the group consisting of sulfate ions, nitrate ions, flu- oride ions, and mixtures thereof; and 0.003 to 0.85 M of a component selected from the group consisting of cations of copper, co- balt, nickel, tin, iron, and lead and mixtures thereof, wherein the trivalent chromium/ hexavalent chromium weight ratio is in the range 0.2 to 1.4.

Magnetron Sputtering Apparatus U.S. Patent 5,399,252. Mar. 21, 1995 M. Scherer et al, assignors to Leybold AG, Hanau, Germany

Apparatus for coating a substrate by magnetron sputtering, comprising an evacuable coating chamber, at least one magnetron cathode in the coating chamber; a target associated with each cathode, com- prising an oval ring of material to be sput- tered; bar means of stainless steel including outer bar means surrounding the oval ring and inner bar means located centrally of the oval ring; and insulating means between the bar means and the cathode, said stain- less steel plates being electrically grounded.

BY SCHAFfNER$ Nii Buffing (Lime) - Stainless Steel Compound - Aluminum *

4 Compound - Chrome Cdoring Roqe - Green Rouge - Plastic v 4 Compound - Emery Cake - Jeweler’s Rouge - Grease Stick - f 4 Abras-Ease Abrasive Belt Lubricant -.All ferrous and non- $ 4 ferrous butring compounds, Bar, Spray, or Paste. 4 Schaffner Metal Center Aircooled @ias type) Buffs - Bias $ 4 Cloth and S&&Bias Sisal, Treated or Untreatad - Satinizer $t

Buffs - Rubber Sectional Contact Wheels - Cloth or $ 4 Abrasive Segment Buffs - Abrasive Bias Type - Extra Life 4 Bias Type - Coloring Buffs. (lhe above in 3’, S, 7’ or 9’ ten- ’ 4 ters, 6’ diam. through 24” diam.) All full disc and piece buffs. 4 Write, wire, oiphone today for information andprices.

$

t

SCHAFFNER HEADQUARTERS Pittsburgh, PA 15202

t

(412) 761-9902 ??FAX: (412) 761-8998 t LJF-G PI ANTS $

A Emsworth, PA ??Jackson, MS $

??Ideal OEM chemical processing uses

* Vertical I horizontal, centrifugal & magnetic drive pumps

??CPVC, polypropylene, PVDF & stainless steel construction

??Pressures to 170 TDH ??Flows to 182 GPM n

METAL FINISHING . OCTOBER 1995 97