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首页> 外文期刊>International Journal of Electrochemical Science >Influence of Laser Treatment on the Corrosive Resistance of WC-Cu Coating Produced by Electrospark Deposition
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Influence of Laser Treatment on the Corrosive Resistance of WC-Cu Coating Produced by Electrospark Deposition

机译：激光处理对电火花沉积WC-Cu涂层耐蚀性的影响

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摘要

The corrosion resistance of C45 carbon steel coated with WC-Cu (at different composition)electrospark deposition (ESD), and the influence of the laser treatment on the properties of the coatingswere examined in acid chloride environment. The potentiodynamic polarization technique was mainlyused. The surface topography was assessed using a scanning electron microscope (SEM). Thefollowing layer structures were observed: homogeneous in the case of Cu and heterogeneous in thecase of WC-Cu. The structure of the coatings depends on the composition of the electrodes. Steelcoated with a nanopowders mixture containing 25% WC and 75% Cu proved to be the most resistantto corrosion. The laser treatment causes the homogenization of the chemical composition, the structurerefinement and the healing of microcracks and pores of the ESD coatings. The corrosion rate in caselaser treatment of WC25-Cu75 coating is about three times slower comparing to coating without laserirradiation.
机译：在酸性氯化物环境下，研究了涂覆有WC-Cu（不同成分）电火花沉积（ESD）的C45碳钢的耐蚀性以及激光处理对涂层性能的影响。主要使用电位动力极化技术。使用扫描电子显微镜（SEM）评估表面形貌。观察到以下层结构：在Cu的情况下是均质的，在WC-Cu的情况下是异质的。涂层的结构取决于电极的组成。事实证明，用含有25％WC和75％Cu的纳米粉末混合物进行钢涂是最耐腐蚀的。激光处理导致ESD涂层的化学成分均匀化，结构细化以及微裂纹和微孔的愈合。与不使用激光辐照的涂层相比，在采用案例激光处理的WC25-Cu75涂层中的腐蚀速率要慢大约三倍。

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