In this study, a coherent ceramic strengthening wear-corrosion resistant CoCrNiMo high entropy alloy coating was successfully fabricated on 304 stainless steel (304ss) by laser cladding. Constituent phases, microstructure, and chemical composition were thoroughly investigated. The hardness and wear resistance were evaluated. Electrochemical tests were performed to measure the corrosion resistance of the passive film. The parameters of the passive films were calculated using the Mott-Schottky and the point defect model. TEM analysis was used to explain the high hardness and superior corrosion resistance on the base of the composition and boundary characteristics between different phases. Combining the results of wear and corrosion assessment, we deduce that a critical content of 2–3 at.% exists for B₄C at which the best wear-corrosion tradeoff of the coating can be achieved. This strategy can be valuable in the development of both wear- and corrosion-resistant equipment in the marine environment.

本研究通过激光熔覆在304不锈钢(304ss)上成功制备了相干陶瓷强化耐磨CoCrNiMo高熵合金涂层。对组成相、微观结构和化学成分进行了彻底研究。评价硬度和耐磨性。进行电化学测试以测量钝化膜的耐腐蚀性。使用 Mott-Schottky 和点缺陷模型计算钝化膜的参数。TEM分析用于根据不同相之间的成分和边界特征来解释高硬度和优异的耐腐蚀性。结合磨损和腐蚀评估的结果，我们推断出 B ₄的临界含量为 2–3 at.%C，此时可以实现涂层的最佳磨损-腐蚀折衷。这种策略在开发海洋环境中的耐磨和耐腐蚀设备方面可能很有价值。