Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/81791
Title: Influence of hydrothermal exposure on surface characteristics and corrosion behaviors of anodized titanium
Authors: Chen, Zhaoxiang
Zhou, Kun
Lu, Xuehong
Lam, Yee Cheong
Keywords: Titanium
Anodization
Issue Date: 2014
Source: Chen, Z., Zhou, K., Lu, X., & Lam, Y. C. (2014). Influence of hydrothermal exposure on surface characteristics and corrosion behaviors of anodized titanium. Surface and Interface Analysis, 46(5), 307-313.
Series/Report no.: Surface and Interface Analysis
Abstract: Titanium surface was modified by anodization in phosphoric acid solution at the voltages of 100 and 250 V, respectively. Surface characteristics and corrosion behaviors of anodized titanium were investigated before and after hydrothermal exposure in 3.5 wt.% NaCl solution at 160 °C for 24 h. It was found that anodization at 100 and 250 V resulted in the formation of a dense and a porous TiO2 layer, respectively. The existence of anatase in the oxide layers of the 250-V samples was confirmed by X-ray diffraction analysis but not in the oxide layers of the 100-V samples. After the hydrothermal exposure, the surface morphology of the 100-V sample changed significantly, and discrete nanorods were formed on the surface. In contrast, the 250-V sample basically preserved their original surface structures after the exposure except that numerous closely packed nanoparticles emerged on the surface. X-ray diffraction analysis indicated that the exposure transformed the amorphous oxides into crystalline anatase. The corrosion behavior investigation of anodized titanium showed that the hydrothermal exposure had slight influence on the corrosion resistance of the 100-V samples but decreased the corrosion resistance of the 250-V samples significantly.
URI: https://hdl.handle.net/10356/81791
http://hdl.handle.net/10220/40984
ISSN: 0142-2421
DOI: 10.1002/sia.5420
Schools: School of Materials Science & Engineering 
School of Mechanical and Aerospace Engineering 
Rights: © 2014 John Wiley & Sons, Ltd.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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