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Effect of Rare Earth Oxides on Microstructure and Corrosion Behavior of Laser-Cladding Coating on 316L Stainless Steel

机译:稀土氧化物对316L不锈钢激光熔接涂层微观结构和腐蚀行为的影响

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The effect of rare earth oxides on the microstructure and corrosion behavior of laser-cladding coating on 316L stainless steel was investigated using hardness measurements, a polarization curve, electrochemical impedance spectroscopy (EIS), a salt spray test, X-ray diffraction, optical microscopy, and scanning electron microscopy (SEM). The results showed that the modification of rare earth oxides on the laser-cladding layer caused minor changes to its composition but refined the grains, leading to an increase in hardness. Electrochemical and salt spray studies indicated that the corrosion resistance of the 316L stainless steel could be improved by laser cladding, especially when rare earth oxides (i.e., CeO2 and La2O3) were added as a modifier.
机译:使用硬度测量研究稀土氧化物对316L不锈钢的激光包覆涂层微观结构和腐蚀行为的影响,偏振曲线,电化学阻抗光谱(EIS),盐雾试验,X射线衍射,光学显微镜和扫描电子显微镜(SEM)。结果表明,激光包覆层上稀土氧化物的改变使其组合物的微小变化,但改变了晶粒,导致硬度增加。电化学和盐喷雾研究表明,通过激光包覆可以提高316L不锈钢的耐腐蚀性,特别是当加入稀土氧化物(即,CeO 2和La2O3)作为改性剂时。

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