Tin-zinc electrodeposition from sulphate-gluconate baths

被引：58
作者：
Guaus, E [1 ]
Torrent-Burgués, J [1 ]
机构：
[1] Univ Politecn Catalunya, Dept Chem Engn, Terrassa 08222, Spain
来源：
JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2003年 / 549卷
关键词：
deposit morphology; electrodeposition; phase structures; stripping; sulphate-gluconate bath; tin-zinc alloys;
D O I：
10.1016/S0022-0728(03)00249-3
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
The electrodeposition of tin-zinc alloys with 20-30% Zn by weight from sulphate-gluconate baths at pH 4 and different [Sn(II)], [Zn(II)] and [gluconate]/([Sn(II)] + [Zn(II)]) ratios was studied. The anodic stripping analysis of the deposits was correlated with their morphology, composition and phase structure. When [Zn(II)] is equal to or not much greater than [Sn(II)], a eutectic type Sn-Zn alloy is obtained, with a Zn content of around 20% by weight, which is greater than that of a thermal eutectic alloy. The morphology of the electrodeposited eutectic Sn-Zn alloy tends to disappear at high deposition charges and a second crystalline coating, richer in Sn, is obtained. (C) 2003 Elsevier Science B.V. All rights reserved.
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页码：25 / 36
页数：12
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