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Abstract
A pulse current hard anodising process and an electrophoretic process were used to form a self-lubricating polytetrafluoroethylene (PTFE) composite anodic film on aluminium alloy 6061. This encompasses an initial formation of a porous alumina film on alumina alloy 6061 by anodising in sulphuric acid, and then the film pores are appropriately enlarged to form further film pores in a diluted phosphoric acid, and subsequently, PTFE particles are introduced into the pores to form a composite hard anodic film, by an electrophoretic process, in the water soluble electrophoretic PTFE emulsion. The films were then examined by scanning electron microscopy and energy dispersive X-ray analysis, and the friction coefficient and microhardness of the film are investigated.