Corrosion resistance, the spelter metsuki steel sheet null which is superior in paint performance and

摘要

PURPOSE:To improve the workability and pitting corrosion resistance of the resulting titled steel sheet, the corrosion resistance at the worked part and the paintability, especially the corrosion resistance after painting by forming a Zn or Zn alloy layer on a steel sheet having a specified composition by plating. CONSTITUTION:One side or both sides of a steel sheet having a composition contg., by weight, 0.01% C, 0.005-0.10% acid-sol. Al, 0.02-0.15% P, 0.1-0.8% Cu and 0.03-0.5% one or more among Ti, Nb, Zr and V are plated with Zn or a Zn alloy. The steel composition may further contain =1% Ni. An Ni or Ni alloy undercoat layer may be formed as an intermediate layer between the steel sheet and the resulting Zn or Zn alloy layer. The plated steel sheet has superior corrosion resistance in a corrosive environment contg. Cl-, superior paintability and workability, so it is suitable for use as a steel sheet for an automobile, a building material or the like.