Initial stages of tin electrodeposition from sulfate baths in the presence of gluconate

被引:38
|
作者
Torrent-Burgués, J
Guaus, E
Sanz, F
机构
[1] Univ Politecn Cataluna, Dept Engn Quim, Terrassa 08222, Spain
[2] Univ Barcelona, Dept Quim Fis, E-08028 Barcelona, Spain
关键词
deposit morphology; gluconate; nucleation; sulfate bath; tin electrodeposition;
D O I
10.1023/A:1014710500122
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Tin electrodeposition in its initial stages in acid sulfate/gluconate baths was studied with varying tin and gluconate concentrations using potential-controlled electrochemical techniques. The deposit morphology was observed by scanning electron microscopy (SEM). A comparison with tin electrodeposition from acid sulfate baths in the absence of gluconate was also carried out. Use of a highly acidic bath leads to nonuniform deposits, even in the presence of gluconate; at pH 4 deposits are uniform, brilliant and suitable for finishing applications. Tin crystallites have a well defined morphology which depends on bath agitation conditions. In the absence of agitation, the crystallites have the same tetragonal shape as in a sulfate bath without gluconate.
引用
收藏
页码:225 / 230
页数:6
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