Corrosion of dental amalgams: electrochemical study of Ag-Hg, Ag-Sn and Sn-Hg phases

被引：26

作者：

Acciari, HA

Guastaldi, AC

Brett, CMA ^{[1
]}

机构：

[1] Univ Coimbra, Dept Quim, P-3004535 Coimbra, Portugal

[2] UNESP, Inst Quim Araraquara, Dept Fisicoquim, Araraquara, SP, Brazil

来源：

ELECTROCHIMICA ACTA | 2001年 / 46卷 / 24-25期

基金：

巴西圣保罗研究基金会;

关键词：

dental amalgams; amalgam phases; corrosion; electrochemical impedance;

D O I：

10.1016/S0013-4686(01)00676-4

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Dental amalgams, formed by reaction of mercury with a powder alloy containing mainly Ag, Sn, Cu and Zn, have a complex metallurgical structure which can contain up to six phases. Their observed corrosion is thus a complex process, which involves contributions from each of the phases present as well as intergranular corrosion. It is thus of interest to investigate the corrosion of individual phases present in dental amalgams. In this work the corrosion behaviour in 0.9% NaCl solution of Ag-Hg, Ag-Sn and Sn-Hg phase components of dental amalgams was investigated by electrochemical methods. The corrosion resistance was found to decrease in the order gamma (1)-Ag2\Hg3, gamma -Ag3Sn and gamma (2)-Sn7Hg. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：3887 / 3893

页数：7

共 11 条

[1] A comparative study of the corrosion of high copper dental amalgams [J].