title: Effect of ultrasonic cavitation erosion on corrosion behavior of high-velocity oxygen-fuel (HVOF) sprayed near-nanostructured WC-10Co-4Cr coating.
abstract: The effect of ultrasonic cavitation erosion on electrochemical corrosion behavior of high-velocity oxygen-fuel (HVOF) sprayed near-nanostructured WC-10Co-4Cr coating in 3.5 wt.% NaCl solution, was investigated using free corrosion potential, potentiodynamic polarization curves and electrochemical impedance spectroscopy (EIS) in comparison with stainless steel 1Cr18Ni9Ti. The results showed that cavitation erosion strongly enhanced the cathodic current density, shifted the free corrosion potential in the anodic direction, and reduced the magnitude of impedance of the coating. The impedance of the coating decreased more slowly under cavitation conditions than that of the stainless steel 1Cr18Ni9Ti, suggesting that corrosion behavior of the coating was less affected by cavitation erosion than that of the stainless steel.
authors.affiliation: Institute of Metals and Protection, College of Mechanics and Materials, Hohai University, 1 Xikang Road, Nanjing 210098, PR China. Electronic address: hongsheng1988@126.com.
authors.forename: Sheng
authors.initials: S
authors.lastname: Hong
authors.affiliation: Institute of Metals and Protection, College of Mechanics and Materials, Hohai University, 1 Xikang Road, Nanjing 210098, PR China. Electronic address: wuyuping@hhu.edu.cn.
authors.forename: Yuping
authors.initials: Y
authors.lastname: Wu
authors.affiliation: Institute of Metals and Protection, College of Mechanics and Materials, Hohai University, 1 Xikang Road, Nanjing 210098, PR China.
authors.forename: Jianfeng
authors.initials: J
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Sciences, 62 Wencui Road, Shenyang 110016, PR China.
authors.forename: Yugui
authors.initials: Y
authors.lastname: Zheng
authors.affiliation: Institute of Metals and Protection, College of Mechanics and Materials, Hohai University, 1 Xikang Road, Nanjing 210098, PR China.
authors.forename: Yujiao
authors.initials: Y
authors.lastname: Qin
authors.affiliation: Institute of Metals and Protection, College of Mechanics and Materials, Hohai University, 1 Xikang Road, Nanjing 210098, PR China.
authors.forename: Jinran
authors.initials: J
authors.lastname: Lin
keywords: Cavitation; Corrosion; HVOF; Near-nanostructured; WC–10Co–4Cr