Corrosion resistance investigation of nanostructured Si- and Si/TiO2-coated Mg alloy in 3.5% NaCl solution

被引：32

作者：

Daroonparvar, M. ^{[1
]}

Yajid, M. A. M. ^{[1
]}

Bakhsheshi-Rad, H. R. ^{[1
]}

Yusof, N. M. ^{[1
]}

Izman, S. ^{[1
]}

Hamzah, E. ^{[1
]}

Kadir, M. R. Abdul ^{[1
]}

机构：

[1] Univ Teknol Malaysia, Fac Mech Engn, Dept Mat Mfg & Ind Engn, Johor Baharu 81310, Johor, Malaysia

来源：

VACUUM | 2014年 / 108卷

关键词：

Mg alloy; PVD; Composite coating; Corrosion; MAGNESIUM ALLOY; COATINGS; BEHAVIOR; AL; MECHANISM;

D O I：

10.1016/j.vacuum.2014.05.020

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Si/TiO2 nano-composite and Si were coated on Mg-Ca alloy by physical vapour deposition (PVD). The surface morphology of specimens was characterised by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) equipped with energy dispersive X-ray spectroscopy (EDS) and atomic-force microscopy (AFM). The AFM results indicated that the average surface roughness of the nano-Si/TiO2 coating is lower than that of the mono-layered Si coating. However, the nanocomposite coating presented a more compact structure with fewer pores, pinholes and cracks than the Si coating. Nano-Si/TiO2 composite coating consisted of TiO2 (110) as the outer layer and Si (111) as the inner layer, producing a greater thickness (1.765 mu m) than the Si coating (1.139 mu m). Electrochemical studies reveal that there is a less significant reduction in the corrosion rate for the nano-Si/TiO2 and Si coatings. However, the nanoSi/TiO2 coating considerably enhanced the corrosion resistance of bare Mg alloy in NaCl solution. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：61 / 65

页数：5

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