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KMID : 0362120080300020009
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Journal of Technologic Dentistry
2008 Volume.30 No. 2 p.9 ~ p.16
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Corrosion Behavior of Ti-Pd System Alloys by Microstructural changes
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Cha Sung-Soo
Kwak Dong-Ju
Nam Sang-Yong
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Abstract
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The surface microstructural changes, mechanical properties and corrosion resistance of Ti-Pd alloys for dental biomaterials have been investigated. Ti, Ti-Pd alloys were melted in arc furnace and the corrosion resistance of Ti-Pd alloys was evaluated by anodic polarization test. The surface microstructural changes and mechanical properties of Ti-Pd alloys were analysed by scanning electron microscope and Vickers micro-hardness tester. The vickers hardnees of pure Ti improved by addition of Pd but Ti-25Pd alloy showed decreasing compared with Ti-15Pd. And anodic polarization and potentiostatic test were conducted in 5% HCl to quantify the resistance to corrosion with the addition of Pd, There was no significant difference in corrosion resistance between pure Ti, Ti-5Pd and Ti-15Pd alloy. However, Ti-25Pd alloy showed decreasing compared with pure Ti in corrosion resistance. From these results, it was concluded that newly formulated Ti-15Pd experimental alloy have adequate hardness and high corrosion resistance, and this alloy is promising candidate for a successful dental casting alloy.
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KEYWORD
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Corrosion behavior, micro-hardness, Titanium alloys, Ti-Pd alloy, Ti-Pd microstructure
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