Compressor for refrigerating machine

A compressor, comprising:

• a casing that is configured to cover an internal space, the internal space including a first space and a second space larger than the first space, the casing having a first casing part covering the first space, and the casing having a second casing part covering the second space;
• a compression mechanism that generates a high-pressure fluid by compressing a low-pressure fluid;
• and
• a motor that drives the compression mechanism,
• the first space and the second space are each a high-pressure space configured to contain the high-pressure fluid, or the second space is a high-pressure space configured to contain the high-pressure fluid and the first space is a low-pressure space configured to contain the low-pressure fluid, and
• a metallic coating being formed on an outer surface of at least the first casing part.