Corrosion and XPS surface evaluation of nickel-chromium based dental casting alloys

Abstract

Two commercially available Ni-Cr-based dental casting alloys, Neptune and Vera Bond alloys, representing high and low Cr and Mo alloys with and without Be, were evaluated. The presence of Be oxide on the surface and the low Cr and Mo content of the Vera Bond alloy were associated with high corrosion rates and susceptibility to accelerated corrosion processes. The complex oxides present on the surface and the high Cr and Mo content of the Neptune alloy, on the other hand, were associated with low corrosion rates and resistance to pitting/crevice corrosion. These results support previous studies indicating the reduced corrosion resistance of Be-containing Ni-Cr alloys, and continues to raise concerns over their release of potentially toxic metal ions.

Publication Title

Southern Biomedical Engineering Conference - Proceedings

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