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Corrosion of amalgams
Author(s) -
BRUNE DAG
Publication year - 1981
Publication title -
european journal of oral sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.802
H-Index - 93
eISSN - 1600-0722
pISSN - 0909-8836
DOI - 10.1111/j.1600-0722.1981.tb01715.x
Subject(s) - tin , corrosion , copper , mercury (programming language) , zinc , amalgam (chemistry) , metallurgy , electrochemistry , chemistry , saliva , metal , materials science , nuclear chemistry , electrode , computer science , programming language , biochemistry
– The release of coppoer, mercury, silver, tin or zinc from conventional, dispersed phase and spherical high copper content amalgams immersed in artifucial saliva solutions for periods up to 30 d has been measured using nuclear tracer techniques. During initial corrosion, i.e. within a few hours, substaintial amounts of mercury were found to be present in particulate matter in the three type of amalgams. The release of particulate matter was pronounced for the dispersed phase type of amalgam. After about 30 d electrochemical corrosion was found to be the predominant process for release various corrosion products. Zinc was demonstrated to be the major corrosion product released to the artificial saliva solutions from conventional as well as dispresed phase amalgams. Due to low radioacivity levels silver and tin could not be quantitatively assayed. However, the upper limits of release of silver and tin in the artificial saliva solutions referring to exposure periods up to 30 d were estimated to 0.1 μg and 25 4mUg respectively. The chemical state of the various corrosion products has been evaluated. The deposition of CuCI 2 3 Cu(OJ) 2 on the surfaces of copper rich amalgams was observed according to X‐ray diffraction analysis.