作者: Akihiro Masuda , Kanji Kuba , Takuma Katase
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摘要: An object and a problem of the present invention is to provide tin (II) oxide powder which has extremely high solubility in an acid or acidic plating solution excellent storage stability air. The for replenishing component tin-alloy solution, comprises 100 5000 ppm antioxidant being contained with mass ratio, such dissolution rate that when 0.1 g added ml g/L aqueous alkylsulfonic at temperature 25° C. stirred, then dissolves therein within 180 seconds.