Center for Biomedical Materials and Engineering, Harbin Engineering University, Harbin 150001, China.
Dent Mater. 2011 Mar;27(3):214-20. doi: 10.1016/j.dental.2010.10.005. Epub 2010 Nov 19.
The aim of the present study was to investigate the effect of thermal oxidation on the corrosion behavior of Ti-5Ag alloy.
The microstructure of Ti-5Ag alloy without and with thermal oxidization treatment were characterized, with commercial pure (CP) Ti as control, by means of X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM). The electrochemical behavior in artificial saliva solution was compared for CP Ti, Ti-5Ag alloy with and without thermal oxidation.
Compared to CP Ti, Ti-5Ag alloy without thermal oxidization treatment possessed much lower current density, higher open circuit potential, larger impedance value, and its corrosion resistance could be further improved with thermal oxidation.
The corrosion resistance was enhanced by Ag addition for titanium and could be further improved by thermal oxidation.
本研究旨在探讨热氧化处理对 Ti-5Ag 合金腐蚀行为的影响。
采用 X 射线衍射（XRD）、X 射线光电子能谱（XPS）和扫描电子显微镜（SEM）等手段，对未经热氧化处理和经热氧化处理的 Ti-5Ag 合金的微观结构进行了研究，并以商用纯（CP）Ti 作为对照。比较了 CP Ti、未经热氧化处理的 Ti-5Ag 合金和经热氧化处理的 Ti-5Ag 合金在人工唾液溶液中的电化学行为。
与 CP Ti 相比，未经热氧化处理的 Ti-5Ag 合金具有更低的电流密度、更高的开路电位、更大的阻抗值，且经热氧化处理后其耐腐蚀性进一步提高。
Ag 的添加提高了钛的耐腐蚀性，而热氧化处理进一步提高了其耐腐蚀性。
