PHOSPHATED GALVANIZED STEEL SHEET

摘要

The phosphate-treated zinc-coated steel sheet has: a steel sheet; a zinc-coating layer of a single ·-phase containing Ni in a range from 10 ppm by mass to solid solution limit, being formed on at least one side of the steel sheet; and a phosphate-treated layer containing Mg in a range from not less than 0.1% by mass to less than 2.0% by mass, being formed on the zinc-coating layer. The steel sheet without treated by sealing has corrosion resistance equivalent to or higher than that of conventional products treated by sealing, and also has excellent blackening resistance.