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

F - Mech Eng,Light,Heat,Weapons

16

J

117/57

F16J 1/02 (2006.01) C23C 18/16 (2006.01) C23C 18/31 (2006.01)

Patent

CA 1078676

SELECTIVE TIN DEPOSITION ONTO ALUMINUM PISTON SKIRT AREAS ABSTRACT OF THE DISCLOSURE 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. - 1 -

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