Corrosion behaviour of nanocomposite TiSiN coatings on steel substrates
Date
2011
Authors
Ahmed, M.
Munroe, P.
Jiang, Z.
Zhao, X.
Rickard, W.
Zhou, Z.
Li, L.
Xie, Z.
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Advisors
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Journal article
Citation
Corrosion Science, 2011; 53(11):3678-3687
Statement of Responsibility
Mohammad Shoeb Ahmed, Paul Munroe, Zhong-Tao Jiang, Xiaoli Zhao, William Rickard, Zhi-feng Zhou, Lawrence Kwok Yan Li, Zonghan Xie
Conference Name
Abstract
Nanocomposite TiSiN coatings were deposited on tool steels. Detailed mechanisms that govern the corrosion of these coated steels were revealed, following immersion tests in a 70% nitric acid solution. Pitting originated preferentially from coating defect sites and expanded with increasing immersion time. Both Young's modulus and hardness measured by nanoindentation decreased as the corrosion damage intensified. A thin oxide layer formed from the thermal annealing of the as-deposited samples at 900 °C was found to be effective against corrosive attack. In addition, compressive residual stress was noted to suppress the propagation of corrosion-induced cracks. The role of residual stress in controlling the corrosion resistance of these ceramic-coated steels is clarified by finite element analysis. © 2011 Elsevier Ltd.
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Copyright © 2011 Elsevier Ltd. All rights reserved.