Process for coating a metallic substrate

摘要

A process for coating a metallic substrate, which comprises applying an electrocoating paint to a metallic substrate, then applying a barrier coating comprising a crosslinking hardenable resin and being capable of forming a barrier coat film having an elongation at break of at least 150% and a stress at break of at least 20 kg/cm2 to the electrocoated film, optionally applying an intermediate coating paint to the barrier coat, and finally applying a top coating paint to the barrier coat or the intermediate coat.