中文摘要：

利用热扩渗方式，以C0304纳米粉体做钴源，在低碳钢表面制备了Fe-Co合金层。研究了处理温度对合金层表面状态和结构的影响，并在3．5％NaCl溶液中对合金层进行了腐蚀电化学研究。结果表明，处理温度高于800℃可在低碳钢表面形成厚度〉25μm，表面钴含量〉20％，并与基底形成冶金结合的Fe-Co合金层，合金层为单一铁固溶体相。通过在低碳钢表面制备Fe-Co合金层可以明显改善其在3．5％NaCl溶液中的耐蚀性。

英文摘要：

Fe-Co alloy coatings were prepared on the surface of mild steel by means of thermal diffusion, using nano- Co304 powder as the source of Co element. The effects of treatment temperature on surface state, structure and corrosion resistance of the Fe-Co alloy coatings were investigated by electrochemical methods in 3.50/oo NaCi solution. The results show that when the treatment temperatureS800℃, single Fe solid solution phase Fe-Co alloy coatings （〉25 μm） formed and the surface Co content（atomic fraction） was higher than 20at.%, and the coatings and substrate were integrated to metallurgy structure. The preparation of Fe-Co alloy coatings on miid steel surface can significantly improve the corrosion resistance in the 3.5 % NaC1 solution.