Metal part and method of manufacturing metal part

摘要

A base material (1) as an anode is immersed in an electrolyte together with a cathode, a current density that is provided to both the anode and the cathode increases from an initial current density of 0 A/dm 2 at a rate that is lower than or equal to 0.35 A/dm 2 per minute, and then the base material (1) is anodized while the prescribed current density is maintained so as to coat a surface (25) of the base material (1) with an anodic oxide film.