Process for coating metallic substrate

摘要

A process for coating a metallic substrate, characterized by applying on a metallic substrate a cation type electrocoating paint, applying thereon a barrier coat comprising a modified polyolefin resin and capable of forming a barrier coat film having a static glass transition temperature of 0 DEG to -60 DEG C. and a corrosion-preventive pigment, optionally applying on said barrier coat an intermediate coating paint and then applying thereon a top coating paint.