Abstract
Recently a gallium alloy without mercury has been developed instead of dental amalgam and they have already been commercialized.In the present study, the corrosion resistance was investigated to obtain useful information to improve corrosion resistance of the gallium alloy by using corrosion series tests;immersion test, cyclic voltammetry, and observation of secondary electron image and analysis of corresponding elements by means of an X-ray microanalyzer.Corrosion processes of the gallium alloy in 1% sodium chloride solution released the gallium ion from ring reaction layer around the core at first, and then selective release of tin ion and indium ion occurred from the matrix.
