Author:
Chang Yen-Hao,Pan Yan-Ting,Chao Chih-Yeh,Lee Huey-Er,Wu Ju-Hui
Abstract
The purpose of this study was to investigate the corrosion behavior of four different dental casting alloys in artificial saliva solutions with varying pH values. Microstructures were observed using scanning electron microscopy. The corrosion behavior of the experimental alloys in artificial saliva was examined using potentiodynamic polarization measurements. The high noble alloy (Au-8.5Pt-2.6Pd-1.4In) exhibited better corrosion resistance with lower anodic current densities in the pH range of 3–5. The anodic current density of the noble alloy (Au-24.9Pd-19.0Ag-5.5In) decreased as the pH decreased. The noble (Pd-37.7Ag-8.5Sn) and base metal (Ni-25Cr-11.5Mo-1.4Si) alloys exhibited lower corrosion resistance with a relatively high current density at pH 3. Compared with noble alloys, base metal alloys exhibited good corrosion resistance in this study. This makes them a promising material for dental castings considering the complex pH changes in the oral environment.
Reference11 articles.
1. Power JM, Wataha JC, Craig RG. Dental materials, properties, and manipulation. Amsterdam, NL. Elsevier 2013.
2. Hassani Katehsari V, Niedermeier W. Solubility of dental core build-up materials in electric fields. J Dent Sci 2019; 14(4): 346-51. https://doi.org/10.1016/j.jds.2019.04.005
3. Taher NM, Al Jabab AS. Galvanic corrosion behavior of implant suprastructure dental alloys. Dent Mater 2003; 19(1): 54-9. https://doi.org/10.1016/S0109-5641(02)00008-8
4. Li T, Swanson OJ, Frankel GS, Gerard AY, Lu P, Saal JE, et al. Localized corrosion behavior of a single-phase nonequimolar high entropy alloy. Electrochim Acta 2019; 306: 71-84. https://doi.org/10.1016/j.electacta.2019.03.104
5. Yang H, Shang X, Wang L, Wang Z. Effect of Constituent Elements on the Corrosion Resistance of Single-Phase CoCrFeNi High-Entropy Alloys in NaCl Solution. Jinshu Xuebao/Acta Metall Sin 2018; 54: 905-10.