采用双层辉光等离子表面冶金技术在Q235钢表面制备Ni-Cr合金渗层,对合金渗层的组织特征、成分和耐蚀性能进行了研究.结果表明:Ni-Cr合金渗层与基体呈现良好的冶金结合状态;渗层中Ni,Cr元素含量由表及里逐渐减少,厚度约为30μm,渗层主要物相为Ni2.9Cr0.7Fe0.36.电化学极化试验表明经Ni-Cr共渗处理后试样的耐蚀性明显优于基材,且Ni-Cr合金渗层的保护效率高达99.7468%,而孔隙率仅有0.2%.
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