HITZE- UND KORROSIONSRESISTENTES MEHRFACHBESCHICHTETES STAHLROHR

摘要

A heat and corrosion resistant steel pipe having multi-layered coating comprising a-steel pipe, a Zn-Ni alloy plating layer deposited to the surface of the steel pipe and a polyvinyl fluoride layer formed on the Zn-Ni alloy plating layer with an epoxy resin being intervened therebetween as an intermediate layer. A metal plating layer comprising Zn-Ni plating layer and Ni-plating layer may be used instead of the Zn-Ni plating layer. A chromate layer may be formed on the metal plating layer.