Electroplating and Oxidizing Blackening for Power Metallurgical Iron-Based Wares(II)

The pretreatment technologies such as degreasing at elevated temperature, sealing of micro-pores and plating of intermediate coating were highlighted with respect to the electroplating and oxidized blackening of powder metallurgical iron-based wares. The current status, characteristics, and operation flow of the technologies for the electroplating and oxidized blackening of the powder metallurgical iron-based wares were introduced as well from a viewpoint of industrial production. It was pointed out the pretreatment including degreasing at elevated temperature, sealing of micro-pores and plating of intermediate coating all had prominent effect on ensuring the quality of the electroplated and oxidized blackened modified layer on the powder metallurgical iron-based wares.