| 摘要 |
PURPOSE: To provide an acid tin plating bath with which a tin plated steel sheet having beautiful brightness can be produced without performing reflow treatment. CONSTITUTION: This plating bath for performing bright tin plating consists of 0.1 to 1.0mol/l of an organic sulfonic acid, 0.1 to 0.85mol/l of tin (II) and a brightener contg. 5×10<-4> to 0.015mol/l of a surfactant having an oxyethylene chain and 2×10<-3> to 0.02mol/l of an aromatic carbonyl compound having a double bond (s). By using the plating bath, a tin plated steel sheet having beautiful brightness can be produced without performing reflow treatment after the electrolysis and accordingly, the economical effect due to the elimination of this production stage is great.
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