低碳钢表面Fe-Co合金层的热扩渗制备及腐蚀电化学行为
Thermal Diffusion Preparation and Electrochemical Corrosion Behavior of Fe-Co Alloy Coatings on Surface of Mild Steel
摘 要
利用热扩渗方式，以Co3O4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＞25 μm，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。
Fe-Co合金层
热扩渗
腐蚀
电化学
mild steel
Fe-Co alloy coating
thermal diffusion
corrosion
electrochemistry
Abstract
Fe-Co alloy coatings were prepared on the surface of mild steel by means of thermal diffusion, using nano-Co3O4 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 3.5% NaCl solution. The results show that when the treatment temperature≥800 ℃, 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 mild steel surface can significantly improve the corrosion resistance in the 3.5% NaCl solution.
中图分类号 TG174,TB304
所属栏目 试验研究
基金项目 国家自然科学基金(51204115; 50615024); 新世纪优秀人才支持计划(NCET-07-0536)
收稿日期 2013/4/1
修改稿日期
网络出版日期
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备注盛敏奇,讲师,博士,
引用该论文: SHENG Min-qi,WAN Kang,ZHONG Qing-dong,XU Ji-fang,LV Chen-kai. Thermal Diffusion Preparation and Electrochemical Corrosion Behavior of Fe-Co Alloy Coatings on Surface of Mild Steel[J]. Corrosion & Protection, 2013, 34(10): 870
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