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

Authors
Acciari, HA Guastaldi, AC Brett, CMA
Citation
Ha. Acciari et al., Corrosion of dental amalgams: electrochemical study of Ag-Hg, Ag-Sn and Sn-Hg phases, ELECTR ACT, 46(24-25), 2001, pp. 3887-3893
Citations number
11
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
ELECTROCHIMICA ACTA
ISSN journal
00134686 → ACNP
Volume
46
Issue
24-25
Year of publication
2001
Pages
3887 - 3893
Database
ISI
SICI code
0013-4686(20010815)46:24-25<3887:CODAES>2.0.ZU;2-0
Abstract
Dental amalgams, formed by reaction of mercury with a powder alloy containi ng mainly Ag, Sn, Cu and Zn, have a complex metallurgical structure which c an contain up to six phases. Their observed corrosion is thus a complex pro cess, which involves contributions from each of the phases present as well as intergranular corrosion. It is thus of interest to investigate the corro sion of individual phases present in dental amalgams. In this work the corr osion behaviour in 0.9% NaCl solution of Ag-Hg, Ag-Sn and Sn-Hg phase compo nents of dental amalgams was investigated by electrochemical methods. The c orrosion resistance was found to decrease in the order gamma (1)-Ag2\Hg3, g amma -Ag3Sn and gamma (2)-Sn7Hg. (C) 2001 Elsevier Science Ltd. All rights reserved.