ISSN:
1572-8838
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
,
Electrical Engineering, Measurement and Control Technology
Notes:
Abstract The corrosion potentials of freshly implanted Dispersalloy and Amalcap dental amalgams were measuredin vivo. Impedance and current measurement methods at controlled potential were used to examine the corrosion of electrodes made from dental amalgams and the binary alloys Hg−Sn and Cu−Sn in a Ringer's solution in the absence of dissolved oxygen. Thesein vitro measurements were used to make some deductions about the nature of the corrosion reactions on the amalgams and to make an estimate of thein vivo electrochemical corrosion rates. It is deduced that the amalgamsin vivo are protected from electrochemical mercury dissolution by the dissolution of the other metals, such as zinc, tin and copper. It is suggested that the mechanisms of mercury loss in dental amalgams are by evaporation, by a coupling with the electrochemical dissolution of zinc, if present, and tin and copper and by mechanical wear mainly through an electrochemical mechanism.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01015227
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