The tribological and electrochemical behavior of HVOF-sprayed Cr3C2–NiCr ceramic coating on carbon steel
The tribological and electrochemical behavior of HVOF-sprayed Cr3C2–NiCr ceramic coating on carbon steel
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DOI：
10.1016/j.ceramint.2014.12.102
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发表时间：
2015-05
影响因子：
5.2
通讯作者：
M. A. Zavareh;Ahmed A. Sarhan;B. A. Razak;W. Basirun
中科院分区：
文献类型：
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作者：
M. A. Zavareh;Ahmed A. Sarhan;B. A. Razak;W. Basirun
采用超音速火焰喷涂（HVOF）技术在碳钢表面制备高耐磨性的碳化铬-镍Chrome（Cr 3C 2-NiCr）复合材料是一种很好的方法。本研究探讨了薄，沉积层的Cr 3C 2-NiCr碳钢的磨损和腐蚀性能方面的影响。通过扫描电镜对超音速火焰喷涂Cr 3C 2-NiCr涂层的显微组织进行了表征。使用销盘式试验机进行磨损试验。通过在9048.96 m的滑动距离上施加不同的载荷来检查磨损重量损失。实验结果表明，涂层样品的耐磨性相比于未涂覆的样品降低了咬合的风险。还进行了电化学测试，并在3.5%NaCl中研究了涂覆样品中基材的行为27天。电化学阻抗谱（EIS）表明，HVOF涂层具有较高的耐腐蚀性，并保护基体免受NaCl电解液的渗透。因此，沉积这层陶瓷复合材料可以保护石油管道在原油输送到炼油厂期间免受海水的协同攻击。
High Velocity Oxygen Fuel (HVOF) is an excellent approach to prepare a good, wear-resistant lamella of Chromium Carbide-Nickel Chrome (Cr3C2–NiCr) on carbon steel for high temperature application. This research investigates the effect of a thin, deposited layer of Cr3C2-NiCr on carbon steel in terms of wear and corrosion properties. The microstructure of the HVOF-sprayed Cr3C2–NiCr coating was characterized at each step by scanning electron microscopy. Wear testing was performed with a pin-on-disk tester. Wear weight loss was examined by applying different loads over a 9048.96 m sliding distance. Experimental results show that the wear resistance of the coated sample reduced the risk of seizure compared to the uncoated sample. An electrochemical test was also performed and the behavior of the substrate in the coated sample was investigated in 3.5% NaCl for 27 days. Electrochemical Impedance Spectroscopy (EIS) showed that the HVOF coating has high corrosion resistance and protects the substrate from NaCl electrolyte penetration. So deposition this layer of ceramic composite is protected oil piping from synergistic attack of seawater during the transport of crude oil to the refinery.