ISSN:1003-8620

CN:42-1243/TF

主管:中信泰富特钢集团股份有限公司

主办:大冶特殊钢有限公司

特殊钢 ›› 2016, Vol. 37 ›› Issue (2): 62-65.

所属专题: 稀土冶金

• 组织和性能 • 上一篇    下一篇

稀土钇对管线钢耐蚀性和物理化学行为的影响

杨吉春,杨全海,丁海峰,刘香君   

  1. 内蒙古科技大学材料与冶金学院,包头 014010
  • 收稿日期:2015-10-21 出版日期:2016-04-01 发布日期:2022-08-08
  • 作者简介:杨吉春(I963-),男,博士(2003年北京科技大学),教授,博士生导师,1984年包头钢铁学院(本科)毕业,冶金新工艺新技术研究。
  • 基金资助:
    国家自然科学基金(51174114)资助

Effect of Rare Earth Yttrium on Corrosion Resistance and Physicochemical Behavior of Pipeline Steel

Yang Jichun , Yang Quanhai , Ding Haifeng , Liu Xiangjun   

  1. School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014010
  • Received:2015-10-21 Published:2016-04-01 Online:2022-08-08

摘要: 试验管线钢(/%:0.04~0.05C,0.20~0.24Si,1.80~1.88Mn,0.010~0.012P,0.004~0.005S,0.27~0.30Cr,0.42~0.46Ni,0.24~0.28Mo,0.20Cu,0.005V,0~0.017Y,0.0031~0.0053O)由10 kg感应炉熔炼,并轧成试棒。采用扫描电镜和能谱仪、电化学技术以及热力学计算的方法研究了稀土钇对管线钢在模拟海水溶液(3.5%NaCl)中抗腐蚀性能的影响。结果表明,稀土可以对钢中夹杂产生变质作用,将大尺寸、尖角状的Al2O3夹杂变质为小尺寸、球状的稀土复合夹杂,所以有利于形成连续致密的内锈层,减少钢基的点蚀源,从而提高钢的抗腐蚀性能。

关键词: 稀土钇, 管线钢, 海水, 耐蚀性, 电化学技术, 热力学分析, 夹杂物

Abstract: Test pipeline steel (/%: 0.04-0.05C, 0.20-0.24Si, 1.80-1.88Mn, 0.010-0.012P, 0.004-0.005S, 0.27-0.30Cr, 0.42-0.46Ni, 0.24-0.28Mo, 0.20Cu, 0.005V, 0-0.017Y, 0.0031 -0.0053O) is melt by a 10 kg induction furnace and rolled to test bar. The effect of rare earth yttrium on corrosion resistance of pipeline steel in simulated seawater (3.5% NaCl) is studied by using scanning electron microscope and energy spectrum analysis, electrochemical techniques and thermodynamics calculated method. Results show that the rare earth has modification effect on inclusions in steel to modify the large scale and spinel structure Al2O3 inclusions to small spheroidal rare earth compound inclusions; therefore it is favorable to form the continuous and compact inner rust layer, decrease the pitting corrosion source and increase the corrosion resistance of steel.

Key words: Rare Earth Yttrium, Pipeline Steel, Seawater, Corrosion Resistance, Electrochemical Technique, Thermodynamics Analysis, Inclusions