| 摘要 |
An iron-containing substrate obtains a thin-tin or a tin alloy by activating a steel substrate surface by being polarized electrically in a composition before plating. The thin-tin tin plate or the tin alloy is electro-plated on the activated surface of the steel substrate. The quantity of pores on the surface of the thin-tin tin plate and the tin alloy is reduced. The objective of the present invention is to increase life span of the steel substrate. |
