Surface treatment with durable low-friction material

摘要

The present invention pertains to the treatment of a metal surface with a durable low-friction material in such a way as to greatly enhance the lubricant properties of the metal surfaces. The surface coating formed is a chromium plated surface containing microcracks so prepared as to permit injection or insertion of perfluorocarbon compositions such as polytetrafluoroethylene in a fused or nearly-fused state. In the method of forming the surface coating as described, the surface is plated by electrodeposition in a chromic acid bath followed by baking to oxidize the external plated surface. In this way, the surface may then be reverse etched to expand the microcracks without affecting the external surface, following which the plated surface may be heated to, or in excess of, the fusion point of the polytetrafluoroethylene material which is inserted preferably by application to the surface from a solid rod.