Manufacturing method of plating-formed black core malleable cast iron member, and plating-formed black core malleable cast iron member and pipe joint

摘要

Provided is a method capable of manufacturing a plating-forming black core malleable cast iron member having a plating layer having excellent adhesion to a black core malleable cast iron member by a method having a smaller burden on the environment than before. The production method of the present invention is a method for producing a plating-formed black core malleable cast iron member in which a plating layer is formed on the surface of the black core malleable cast iron member, and graphitization is performed in a non-oxidizing and decarburizing atmosphere. A step of immersing the graphitized black core malleable cast iron member in the flux for 3.0 minutes or more, and a step of heating the black core malleable cast iron member to 90 ° C. or higher after removing from the flux. It has a step of performing hot-dip plating on the heated black core malleable cast iron member.