Investigation of the photo-catalytic coating on AZ91 alloy

JOURNAL OF ALLOYS AND COMPOUNDS

卷:467

Article

Wang, Jian-Yih¹  Tsai, Hao-Jan¹  Uan, Jun-Yen²  Wong, Ming-Show¹  Wu, Shyi-Kaan³ 

[1] Natl Dong Hwa Univ, Dept Mat Sci & Engn, Shoufeng 974, Hualien County, Taiwan

[2] Natl Chung Hsing Univ, Dept Mat Sci & Engn, Taichung 402, Taiwan

[3] Natl Taiwan Univ, Dept Mat Sci & Engn, Taipei 106, Taiwan

关键词: AZ91 alloy;    Magnetron sputtering;    Contact angle;    Corrosion resistance;    Photo-catalytic;   

DOI  :  10.1016/j.jallcom.2007.12.049

来源: Elsevier

【 摘 要 】

A TiO(2) thin film was deposited on AZ91 alloy to enhance the corrosion-resistance and photo-catalytic properties. Experimental results showed that the TiO(2)-coated AZ91 exhibited hydrophilicity. The corrosion potential of TiO(2)-deposited AZ91 was higher than that of the uncoated AZ91, suggesting an increase in the intrinsic corrosion resistance. Compared with the uncoated samples, the corrosion resistance of TiO(2)-deposited samples, on the other hand, deteriorated. FE-SEM observation showed polycrystalline characteristics as well as the presence of pinholes on the film. EDS analysis revealed the pinholes to be locales of incomplete deposition, where accelerated corrosion occurred. (C) 2007 Elsevier B.V. All rights reserved.

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