Selective tin deposition onto aluminum piston skirt areas

Details Selective tin deposition onto aluminum piston skirt areas Selective tin deposition onto aluminum piston skirt areas

1976-01-12

1977-04-19

Kendall, Ralph S.

Coating processes

With pretreatment of the base

Metal base

427420, 427427, 148 627, 123193P, C23F 700

Patent

active

040189490

ABSTRACT:
A cost saving method for protecting an engine element against operation galling and corrosion is disclosed. The element, particularly a piston, is cast of aluminum and cleaned free of dirt and organic matter. A warm stream of an aqueous solution containing a protective metal agent is directed onto a selected zone of the element. The agent consists essentially of potassium stannate and the zone is preferably the middle region of a piston skirt extending from the upper skirt periphery to lower skirt extremity (tail). The stream is maintained as a laminar flow as it traverses the selected zone. An ultra-thin protective coating is adherently deposited on the zone of the piston.

REFERENCES:
patent: 1346638 (1920-07-01), Crook et al.
patent: 2377606 (1945-06-01), Blackman et al.
patent: 2947639 (1960-08-01), Balden
patent: 2955886 (1960-10-01), Fritzlen et al.
patent: 3113051 (1963-12-01), Pimbley et al.

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