Chemistry: electrical and wave energy – Processes and products
Patent
1988-02-18
1989-05-09
Niebling, John F.
Chemistry: electrical and wave energy
Processes and products
204 384, 204 561, 204 585, 204147, 427 38, C25D 1100, C25D 1136, C25D 500
Patent
active
048286559
ABSTRACT:
A method of using an electrochemical process in oil-based lubricants to form friction-reducing and wear-reducing molybdenum/iron phosphate films on cast iron surfaces. A cast iron surface acting as the anode means is first coated with a thin film of molybdenum and then bombarded with high energy inert gas ions to form a layer of molybdenum/iron alloy on the surface before the electrochemical process. An electrolytic additive of dialkyl hydrogen phosphate is added to the oil-based lubricant to improve its electrical conductance and to make it an ionic conductor. This method enables not only the formation of uniform molybdenum/iron phosphate films on cast iron surfaces but also the in situ repair of such films after damage has occurred.
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Tung Simon C.
Wang Su-Chee S.
General Motors Corporation
Hsing Ben C.
Niebling John F.
Tung Randy W.
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