Coating film for suppressing adhesion of deposits, and flow-path component provided with the coating film

A lubricant line of a gas turbine or supercharger is provided with a flow-path component through which the lubricant passes. A sump chamber (45) and vent line (49) are included in the flow-path component used in the gas turbine. The surface in contact with the lubricant, exposed to temperatures of about 300-450 DGE C in the flow-path component, is coated with a coating film containing nickel or a nickel-phosphorus alloy, and particles comprising polytetrafluoroethylene.