Document Type
Journal Article
Keywords
[RSTDPub], A. Ceramic, B. Modelling studies, C. SEM, B. XPS, C. Acid corrosion, C. Pitting corrosion
Faculty
Faculty of Computing, Health and Science
School
School of Engineering
RAS ID
12301
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
Access Rights
free_to_read
Comments
This is an Author's Accepted Manuscript of: Ahmed, M. S., Munroe, P., Jiang, Z., Zhao, X. , Rickard, W., Zhou, Z., Li, L., & Xie, Z. (2011). Corrosion behaviour of nanocomposite TiSiN coatings on steel substrates. Corrosion Science, 53(11), 3678-3687. Available here