Method for preventing and removing oxide colour or oxide skin generated by heat treatment for brass parts

The invention belongs to the technical field of surface treatment, and relates to a method for preventing and removing an oxide colour or an oxide skin generated by heat treatment for brass parts. According to the method disclosed by the invention, a processing technological flow for the brass parts is adjusted to comprise the steps of blanking and forming, trichloroethylene oil removal, organic solvent oil removal, alkali oil removal, deionized water washing, corrosion, passivation, flowing cold water washing, stabilizing treatment, drying, destressing heat treatment, and passivation film removal. According to the method disclosed by the invention, pollution is controlled on the protection layer by means of adding a compact passivation layer as a transitional protection layer during the destressing heat treatment for brass, and removing the passivation layer after the destressing heat treatment, so that matrix metal is out of touch with the pollution. After the method is used, the metal basic colour and glos