酸性光亮电镀锡铈合金工艺的研究

采用赫尔槽试验研究了镀液中各种成分的作用及工艺条件,用扫描电镜(SEM)观察了镀层形貌。研究发现,在酸性光亮镀锡镀液中添加铈盐和自制的光亮剂,可获得一种铈含量达0.5%的锡铈合金镀层,该镀层外观光亮、平整。通过镀层性能测试,并与纯锡镀层性能进行比较,发现:当镀层厚度大于5μm时,锡铈合金镀层表面致密均匀,结晶细致光亮;其抗氧化性、耐蚀性、防变色性能及可焊性明显优于纯锡镀层,解决了纯锡镀层在焊锡时易发生变色,提高了焊接温度。

Electroplating Technology of Bright Acidic Sn- Ce Alloy

With Hull cell experiment, the function component in the bath and technological conditions of bright acidic Sn - Ce alloy were studied. The appearance of deposits was tested by SEM. It was found that a smooth and bright plating layer of Sn - Ce alloy with 0.5% Ce was obtained by adding cerium salt and the homemade brightener in the tin electroplating bath. The coating was tested and compared with pure tin electroplating plating. The results showed that when the plating was thicker than 5 μm, the surface of the Sn - Ce alloy plating was uniform and dense with fine and bright crystals. It was more antioxidant, corrosion -resistant, solderable and resistant to change color than pure tin plating.