Rotary expansible chamber devices – Working member has planetary or planetating movement – Helical working member – e.g. – scroll
Patent
1996-03-22
1998-07-07
Gorgos, Kathryn L.
Rotary expansible chamber devices
Working member has planetary or planetating movement
Helical working member, e.g., scroll
1231932, 205 50, 205149, 205172, 205173, 205325, 205326, 205332, 4284722, 428667, C25D 1106
Patent
active
057758921
ABSTRACT:
According to the present invention, an aluminum alloy containing silicon is anodized using an electrolyte including a compound containing an anion having complexing capability such as sodium hydrogenphosphate or tribasic sodium phosphate, a salt of an organic acid containing an oxyacid anion such as sodium citrate or sodium tartrate or an alcohol such as sorbitol, and a halide such as potassium fluoride or sodium fluoride. The use of such an electrolyte results in a reduced amount of silicon being incorporated in the anodic oxide film. When the resulting oxide film is subjected to an electrodeposition treatment such as electroplating or electrolytic coloring, wasteful consumption of electrodeposition current can be inhibited. An aluminum alloy decorative cover is produced by buffing the surface of an aluminum alloy containing silicon, forming the anodized film on the buffed surface, and subjecting the anodized film to sequential nickel and chromium plating. The anodizing process of the invention for anodizing an aluminum alloy containing silicon is used to anodize a spiral scroll member of a compressor and the inner circumferential surface of the cylinder of a cylinder block.
REFERENCES:
patent: 3663379 (1972-05-01), Kendall
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F.A. Lowenheim, Electroplating, McGraw-Hill Book Co., New York, 1978, pp. 89-91.
Ikeda Hideaki
Miyasaka Hajime
Gorgos Kathryn L.
Honda Giken Kogyo Kabushiki Kaisha
Leader William T.
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