Micro-contamination-free coating for die-cast component in magne

Details Micro-contamination-free coating for die-cast component in magne Micro-contamination-free coating for die-cast component in magne

1989-07-19

1991-05-21

Niebling, John F.

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite; i.e., plural, adjacent, spatially distinct metal...

148264, 20419231, 427 38, 428632, 428938, C23C 1402, C23C 2224

Patent

active

050174398

ABSTRACT:
A process for treating the surface of a die-cast article including the steps of chemically cleaning the surface, cleaning the surface with an argon plasma, depositing an ion vapor generated metallic coating, mechanically treating the deposited coating, and chromate converting the mechanically treated coating. Preferably, the die-cast metal article consists essentially of an aluminum or magnesium alloy while the metallic coating is aluminum. The mechanical treatment may be carried out by bead blasting, tumbling or barreling and may be followed by walnut shell polishing.

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F. A. Lowenheim, Electroplating, McGraw-Hill Book Co., New York, 1978, pp. 93-98, 442-449.
B. Chapman, Glow Discharge Processes, John Wiley & Sons, New York, 1980, pp. 276-277.
D. M. Mattox, Fundamentals of Ion Plating, J. Vac. Sci. Technol., vol. 10, No. 1, Jan/Feb. 1973, pp. 47-52.
R. Carpenter, Ion Plating: How to Make Films Stick, Compon. Technol. (GB), vol. 4, No. 6, Feb. 1971, pp. 17-22.

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