本发明系关于耐腐蚀性良好的制罐用钢板的制造。本发明讲的所谓耐蚀性,系指钢板对于食品及其罐头内容物的耐点蚀性和罐外面的防蚀性两方面。作为制罐材料,只具有某一方面的优点还不能认为是有价值的。以下将制罐用钢板的耐腐蚀性简称为耐点蚀性,在大气中将钢板表面除锈洗净到重新产生赤锈的时间长短称为防蚀性。 This invention relates to the manufacture of the steel sheet for canmaking which is excellent in corrosion resistance. As used herein, the term “corrosion resistance” refers to both the pitting resistance of a steel sheet against the contents of a foodstuff and its contents and the corrosion resistance outside a can. As a canning material, only one aspect of the advantages can not be considered as valuable. The following will be made of steel corrosion resistance referred to as pitting resistance, the surface of the steel plate in the atmosphere to wash rust to red rust again the length of time known as the corrosion resistance.