Surface treatment agent, a surface treatment method and machine parts

A processing material, lubricity to a surface such as sliding parts, workability, surface treatment agents to prepare excellent films on corrosion resistance, and surface treatment method using such a surface treatment agent, and lubricity, providing the mechanical parts with excellent film formability and corrosion resistance on the surface of the member to an object. A boiling point of the 300 ° C. or less of the volatile liquid 30 to 95 wt%, the lubricating oil base oil and / or an antirust agent from 1 to 50% by weight, and a compound having an amide group from 0.1 to 50 mass % surface treating agent containing, and the surface treatment agent is adhered to the member, the surface treatment method to volatilize the volatile liquid, as well as lubricating oil base oil and / or an antirust agent from 2.0 to 99.8% by weight and machine parts having a gel-like thin film having a thickness of 0.1~50μm containing a compound having an amide group from 0.2 to 98.0% by weight on the surface. .BACKGROUND