以纳米NiO粉体为Ni源,通过热扩渗在低碳钢表面制备Fe-Ni合金层,研究了处理温度对Fe-Ni合金层表面状态、结构和耐腐蚀性能的影响.结果表明:处理温度高于800℃可在低碳钢表面形成厚度20-25μm、表面Ni含量(原子分数)高于25％、与低碳钢基底形成了冶金结合的Fe-Ni合金层,处理温度不低于900℃时Fe-Ni合金层为单一α-Fe固溶体相.随着处理温度的提高,Fe-Ni合金层在质量分数为3.5％NaCl溶液中的耐腐蚀性能提高.在3.5％的NaCl溶液中Fe-Ni合金层的Ecorr均较低碳钢的Ecorr发生了正移,Fe-Ni合金层的icorr均较低碳钢的icorr有不同程度的降低,Fe-Ni合金层的电化学阻抗均大于低碳钢的电化学阻抗.
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