Resumo

SOUSA, Lucíola Lucena de; FELIPE, Hamilton de; CODARO, Eduardo Norberto  e  NAKAZATO, Roberto Zenhei. Electrochemical and Microstructural Study of Ni-Cr-Mo Alloys used in Dental Prosthesis After Different Remelting Processes. Corros. Prot. Mater. [online]. 2010, vol.29, n.2, pp.42-48. ISSN 0870-1164.

Ni-Cr-Mo alloys are widely used as fixed dental prostheses, and different procedures for remelting are used which can change the mechanical properties and corrosion resistance. The main aim of this study was to analyze the electrochemical behavior, microstructures and hardness of two remelted alloys by the open flame process (oxy-GLP torch) and by induction in high frequency furnace. Metallography analysis showed dendritic structures with large grains and precipitates in their contours. Alloys recast by induction displayed a lower corrosion resistance in physiologic serum, at 37 °C and higher hardness values.

Palavras-chave : Corrosion; Dental Alloy; Nickel-Chrome-Molybdenum.

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