Patent ID: 8220433

Claim:
A piston for an internal combustion engine, comprising: a piston base material; and a film of lubrication coating composition having an inner coating layer formed on a surface of the piston base material and an outer coating layer formed on a surface of the inner coating layer opposite to a surface facing the piston base material, the inner coating layer containing at least one of a polyamide-imide resin, a polyimide resin and an epoxy resin as a binder and 0 to 50% by weight or less of at least one of graphite and molybdenum disulfide as a solid lubricant based on the total weight of the inner coating layer, the outer coating layer containing at least one of a polyamide-imide resin, a polyimide resin and an epoxy resin as a binder and 50 to 95% by weight of at least one of graphite and molybdenum disulfide as a solid lubricant based on the total weight of the outer coating layer.