Phosphate-treated steel plate

摘要

A phosphate-treated steel plate comprises a zinc-base plated steel plate; a zinc phosphate coating layer formed on the surface of the zinc-base plated steel plate; and an organic or inorganic coating formed on the zinc phosphate coating layer. The organic coating comprises at least one organic resin selected from the group consisting of an ethylene-base resin, an epoxy-base resin, a urethane-base resin, and an acrylic-base resin. The inorganic coating comprises a phosphate coating consisting mainly of a phosphate.