期刊
TRIBOLOGY TRANSACTIONS
卷 58, 期 2, 页码 337-348出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/10402004.2014.971994
关键词
HVOF; WC-Co-Cr; Mine Water; Wear; Corrosion
资金
- National Research Foundation (NRF) National Nanotechnology Equipment Programme (NNEP) [74407]
- NRF [74533]
- Tshwane University of Technology
WC-based cermet coatings have been considered as alternative replacements to the more traditional hard chrome plating for improved surface properties. Though these coatings are used in engineering applications requiring superior hardness and improved wear resistance, little is known about their corrosion resistance. In this study, four WC-based composite coatings were deposited onto austenitic stainless steel substrates using high-velocity oxy fuel (HVOF) technology. Wear and potentiodynamic scanning studies in a simulated mine environment were conducted on the coatings. Characterization of the as-received powders, coating structure, composition, and morphology was carried out prior to and after wear studies and corrosion testing using optical microscopy, scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDX) elemental analysis. The results showed that the chemical composition of the binder material plays a significant role in influencing the wear and corrosion behavior of HVOF-sprayed WC cermet coatings in an aggressive mine water environment. During wet sliding, addition of Cr in the binder improves the wear resistance of the coating. WC-10Co-4Cr showed the highest wear resistance in a wet sliding environment and also exhibited the best corrosive behavior of the evaluated coatings, due to a Cr2O3 oxide passive film that forms during anodic polarization.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据