引用本文:祝志祥， 韩钰， 陈新， 马壮， 柳彦博.等离子喷涂制备直流接地极钢基体NiFe2O4防腐涂层[J].中国表面工程,2012,25(3):37~41
ZHU Zhi-xiang, HAN Yu, CHEN Xin, MA Zhuang, LIU Yan-bo.Nickel Ferrite Coatings on Steel for DC Ground Electrode Prepared by Plasma Spraying Process[J].China Surface Engineering,2012,25(3):37~41
【打印本页】   【HTML】   【下载PDF全文】   【查看/发表评论】  【EndNote】   【RefMan】   【BibTex】
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被：浏览 4250次   下载 2267次 本文二维码信息
码上扫一扫！
分享到： 微信 更多
字体:加大+|默认|缩小-
等离子喷涂制备直流接地极钢基体NiFe2O4防腐涂层
祝志祥， 韩钰， 陈新， 马壮， 柳彦博1,2
1. 中国电力科学研究院 电工与新材料研究所， 北京 100192;2. 北京理工大学 材料学院， 北京 100081
摘要:
为提高常规碳钢直流接地极本体的耐蚀性能，采用固相反应法结合团聚－破碎法造粒合成出适合等离子喷涂的NiFe2O4粉体，利用等离子喷涂工艺在钢基体上制备NiFe2O4铁氧体涂层，并利用场发射扫描电镜、金相显微镜、X射线衍射仪以及涂层结合强度、电阻率、直流电解等测试方法，对NiFe2O4涂层的微观组织结构、物理电气和腐蚀性能进行了研究。结果表明：NiFe2O4涂层与基体的平均结合强度为21.8 MPa，涂层平均电阻率约为3.60×10-2 Ω·cm，且涂层耐电解腐蚀性能良好，腐蚀率约为1.86 g/(A·a)，可较好满足直流输电系统中接地极材料的服役要求，初步显示出等离子喷涂制备直流接地极用铁氧体环保防腐涂层的工艺可行性。
关键词:  固相反应法  铁氧体  NiFe2O4  电阻率  耐蚀
DOI：
分类号:
基金项目:中国电力科学研究院青年科研基金项目(DG8411003)
Nickel Ferrite Coatings on Steel for DC Ground Electrode Prepared by Plasma Spraying Process
ZHU Zhi-xiang, HAN Yu, CHEN Xin, MA Zhuang, LIU Yan-bo1,2
1. Department of Electrical Engineer and New Material Application, China Electric Power Research Institute, Beijing 100192;2. School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081
Abstract:
To improve the corrosionresistance of traditional steel DC ground electrode, pure NiFe2O4 powders were synthesized by solid state reaction. Via the powder granulation by grain aggregation and crushing, the NiFe2O4 ferrite coatings were prepared on the steel substrate through plasma spraying technology. The phase and microstructure of the coating were investigated by fileld emission scanning electron (FESEM), metallographic microscopy and Xray diffraction (XRD), while the physical and electrical properties of the coating were measured by bonding strength, resistivity and DC electrolysis tests. The results showed that the mean adhesion strength of the coating was 21.8 MPa, and the average resistivity of NiFe2O4 coating was about 3.60×10-2 Ω·cm, as well as the electrolysis corrosion rate was about 1.86 g/(A·a), which could satisfy the performance needs of DC ground electrode materials. This study also indicates the feasibility of corrosionresistant ferrite coating preparation using plasma spraying technology.
Key words:  solid state reaction  ferrite  nickel ferrite  resistivity  corrosionresistance
手机扫一扫看