Slide member, refrigerant compressor incorporating slide member, refrigerator and air conditioner

A slide member which is used in a slide unit which is included in a refrigerant compressor for compressing a refrigerant and provided inside a sealed container which reserves lubricating oil having a viscosity in a range of VG3 to VG100 therein, the slide member comprising:

• a sliding surface comprising an oxide coating film formed directly on a surface of a base material of the slide member, the base material comprising an iron based material, the oxide coating film being entirely formed on the surface of the base material by oxidizing the base material, and the oxide coating film being provided on the entirety of the sliding surface, wherein
• the oxide coating film comprises a three-layer structure including a first layer comprising Fe2O3, a second layer comprising Fe3O4, and a third layer comprising FeO in this order from an outermost surface of the slide member, and
• the oxide coating film has a dense structure and minute concave/convex portions with a height difference in a range of0.01 μm to 0.1 μm, the concave/convex portions being on an outermost surface of the slide member.