Hong Sheng, Wu Yuping, Zhang Jianfeng, Zheng Yugui, Zheng Yuan, Lin Jinran
Institute of Metals and Protection, College of Mechanics and Materials, Hohai University, 1 Xikang Road, Nanjing 210098, PR China.
Institute of Metals and Protection, College of Mechanics and Materials, Hohai University, 1 Xikang Road, Nanjing 210098, PR China.
Ultrason Sonochem. 2016 Jul;31:563-9. doi: 10.1016/j.ultsonch.2016.02.011. Epub 2016 Feb 6.
The high-velocity oxygen-fuel (HVOF) spraying process was used to fabricate conventional WC-10Co-4Cr coatings and FeCrSiBMn amorphous/nanocrystalline coatings. The synergistic effect of cavitation erosion and corrosion of both coatings was investigated. The results showed that the WC-10Co-4Cr coating had better cavitation erosion-corrosion resistance than the FeCrSiBMn coating in 3.5 wt.% NaCl solution. After eroded for 30 h, the volume loss rate of the WC-10Co-4Cr coating was about 2/5 that of the FeCrSiBMn coating. In the total cumulative volume loss rate under cavitation erosion-corrosion condition, the pure cavitation erosion played a key role for both coatings, and the total contribution of pure corrosion and erosion-induced corrosion of the WC-10Co-4Cr coating was larger than that of the FeCrSiBMn coating. Mechanical effect was the main factor for cavitation erosion-corrosion behavior of both coatings.
采用高速氧燃料（HVOF）喷涂工艺制备了传统的WC-10Co-4Cr涂层和FeCrSiBMn非晶/纳米晶涂层。研究了两种涂层的空蚀和腐蚀协同效应。结果表明，在3.5 wt.% NaCl溶液中，WC-10Co-4Cr涂层比FeCrSiBMn涂层具有更好的抗空蚀-腐蚀性能。侵蚀30 h后，WC-10Co-4Cr涂层的体积损失率约为FeCrSiBMn涂层的2/5。在空蚀-腐蚀条件下的总累积体积损失率中，纯空蚀对两种涂层起关键作用，且WC-10Co-4Cr涂层的纯腐蚀和蚀致腐蚀的总贡献大于FeCrSiBMn涂层。力学效应是两种涂层空蚀-腐蚀行为的主要因素。
