Two layer-coated steel materials and process for producing the same

A two layer-coated steel material especially suitable for the cationic electrodeposition of a lacquer coating thereon which lacquer coating has few surface defects and excellent corrosion-resistant properties, said two-layer steel material comprising a steel substrate and a two layer-coating composed of ( 1) a base coating layer formed on a surface of said steel substrate, which base coating layer is zinc or a zinc-based alloy, said base coating capable of protecting the steel substrate from corrosion and (2) a surface coating layer formed on said base coating layer, which surface coating layer is an iron-zinc alloy having an effective amount of zinc up to 40% by weight sufficient to reduce the surface defects and enhance the corrosion resistance of said two layer coated material.