電気化学測定法による歯科用合金の腐食試験 : その1 2元系銀合金の腐食試験

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  • Corrosion Test of Dental Alloys by Electrochemical Measurement : Part 1 Corrosion test of binary system alloys contained with silver

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The electrochemical characteristics of binary alloys composed of silver and various amounts of copper, indium, tin, or palladium, were tested by cyclic voltametry in various kinds of solution. Four kinds of electrolytes were used : 1-mole parchloric acid solution, 1% lactic acid solution, 0.05% hydrochloric acid solution, and 1% saline solution. The results are as follows. 1) The oxidation and reduction mechanisms of the metallic elements differed for each electrolyte. 2) The silver element of the specimen surface produced a film of silver chloride in the solutions containing chloride ions, and it strengthened with higher concentrations of these ions. 3) For silver-tin alloys, a film of SnO_2 formed in all electrolytes, preventing corrosion of the alloy itself. 4) Different phases of the alloys were readily discerned by cyclic voltametry. 5) Solid phases of the alloys were similar to pure silver in their electrochemical characteristics. 6) Palladium ions, which were not observed to be released from silverpalladium alloys in previous reports, were found in the 1% saline solution after cyclic voltametry.

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  • 松本歯学

    松本歯学 16 (2), 172-186, 1990-08-31

    松本歯科大学学会

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