钇对X100管线钢抗腐蚀性能的影响
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摘要
采用晶相显微镜、扫描电镜(SEM)和电化学技术等方法研究了钇(Y)对X100管线钢在3.5%Na Cl(质量分数)溶液中抗腐蚀性能的影响。结果表明,钢中加入适量的Y可以提高管线钢的抗腐蚀性,但Y含量过高对管线钢抗腐蚀性产生危害作用。分析其原因是:钢中加入适量的Y不仅可以细化晶粒,还可以变质钢中的有害夹杂,有利于钢基表面形成均匀致密的内锈层,阻碍腐蚀介质进入到钢基,从而提高了钢的抗腐蚀性能。当Y含量过高时,钢中夹杂物呈群聚态存在,从而使钢基抗腐蚀性能下降。
The effect of rare earth Y on corrosion property of X100 pipeline steel immersed in 3. 5% Na Cl( wt%) solution was studied by means of metallurgical microscopy、SEM and electrochemical techniques. The results show that the pipeline steel has a better anti-corrosion property with addition of moderate rare earth Y. However,it has an adverse effect on steel when rare earth Y is excess. The reasons for this are that the additions of moderate rare earth causes small size grains of pipeline steel and can also modify inclusions in steel,which results in the creation of uniform compact inner rust layer. The caustic ion is blocked by the inner rust layer and it can improve anti-corrosion property of the steel. When the rare-earth content is too high,the inclusions in the steel exist in a cluster state,which reduces the corrosion resistance of the steel base.
The effect of rare earth Y on corrosion property of X100 pipeline steel immersed in 3. 5% Na Cl( wt%) solution was studied by means of metallurgical microscopy、SEM and electrochemical techniques. The results show that the pipeline steel has a better anti-corrosion property with addition of moderate rare earth Y. However,it has an adverse effect on steel when rare earth Y is excess. The reasons for this are that the additions of moderate rare earth causes small size grains of pipeline steel and can also modify inclusions in steel,which results in the creation of uniform compact inner rust layer. The caustic ion is blocked by the inner rust layer and it can improve anti-corrosion property of the steel. When the rare-earth content is too high,the inclusions in the steel exist in a cluster state,which reduces the corrosion resistance of the steel base.
引文
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[14]李全安,陈晓亚,刘文健,等.复合添加Sm与Nd对AZ81镁合金组织和性能的影响[J].稀土,2015,36(2):36-41.Li Q A,Chen X Y,Liu W J,et al.Effects of Sm and Nd on microstructure and properties of AZ81 magnesium alloy[J].Chinese Rare Earths,2015,36(2):36-41.
[15]杨吉春,杨昌桥,贾利涛.铈对IF钢冲击韧性的影响[J].稀土,2014,35(3):19-22.Yang J C,Yang C Q,Jia L T.Effect of rare earth element Ce on impact toughness of IF steel[J].Chinese Rare Earths,2014,35(3):19-22.
[2]高惠临.管道工程面临的挑战与管线钢的发展趋势[J].焊管,2010,33(10):5-18.Gao H L.The challenges for pipeline projects&development trend of pipeline steel[J].Welded Pipe and Tube,2010,33(2):5-18.
[3]王龙妹,杜挺,卢先利,等.微量稀土元素在钢中的作用机理及应用研究[J].稀土,2001,22(4):37-40.Wang L M,Du T,Lu X L,et al.Study of behaviors and application of micro-rare earth elements in steel[J].Chinese Rare Earths,2001,22(4):37-40.
[4]王龙妹.稀土元素在新一代高强韧钢中的作用和应用前景[J].中国稀土学报,2004,22(1):48-54.Wang L M.Application prospects and behavior of RE in new beneration high strength steels with superior toughness[J].Journal of the Chinese Society of Rare Earths,2004,22(1):48-54.
[5]杨吉春,刘晓,高学中,等.稀土元素Ce对2Cr13不锈钢中夹杂物变性的影响[J].特殊钢,2007,28(3):30-31.Yang J C,Liu X,Gao X Z,et al.Effect of rare-earth element Ce on modification of inclusion in stainless steel2Cr13[J].Special Steel,2007,28(3):30-31.
[6]赵莉萍,王锦飞,麻永林,等.稀土元素Y对0Cr13不锈钢组织及腐蚀性能的影响[J].钢铁,2010,45(4):65-67,79.Zhao L P,Wang J F,Ma Y L,et al.Effect of rare earth Y on microstructure and corrosion property of 0Cr13 stainless steel[J].Iron&Steel,2010,45(4):,2010,45(4):65-67,79.
[7]朱艳华,庄稼,古户波,等.Ce3+和钼酸钠对X80钢的缓蚀协同效应[J].稀土,2015,36(1):40-47.Zhu Y H,Zhuang J,Gu H B,et al.Synergistic inhibition of X80 steel corrosion by combination of Cerium nitrate and sodium molybdate[J].Chinese Rare Earths,2015,36(1):40-47.
[8]方琦,李春龙,勤牧,等.稀土对低碳高铌钢相变行为及组织的影响[J].稀土,2015,36(1):35-39.Fang Q,Li C L,Qin M,et al.Effect of rare earth on transformation behavior and microstructures of low carbon high niobium steel[J].Chinese Rare Earths,,2015,36(1):35-39.
[9]董方,赵晓辉,杨雷.铈对00Cr12晶间腐蚀影响的试验研究[J].稀土,2014,35(1):86-91.Dong F,Zhao X H,Yang L.Effect Ce on intergranular corrosion of 00Cr12 ferrite stainless steel[J].Chinese Rare Earths,2014,35(1):86-91.
[10]杨吉春,曹晓恩,杨昌桥,等.稀土Ce对X80钢低温冲击韧性的影响[J].稀土,2013,34(2):1-5.Yang J C,Cao X E,Yang C Q,et al.Effect of Ce on low temperature impact toughness of X80 steel[J].Chinese Rare Earths,2013,34(2):1-5.
[11]张蕙文,毛裕文,孙明华,等.稀土对钢耐大气腐蚀性能的影响[J].北京科技大学学报,1994,16(5):491-495.Zhang H W,Mao Y W,Sun M H,et al.The effect of rare earth on resistance to atmospheric corrosion of steel[J].Journal of University of Science and Technology Beijing,1994,16(5):491-495.
[12]曹楚南.腐蚀电化学原理(第三版)[M].北京:化学工业出版社,2008.74.Cao C N.Principles of Electrochemistry of Corrosion(3rd Ed)[M].Beijing:Chemical Industry Press,2008.74.
[13]郑雷刚,杨怀玉.饱和Na Cl溶液浸泡下混凝土试块中有机阻锈剂对钢筋腐蚀行为的影响[J].物理化学学报,2010,26(9):2354-2630.Zheng L G,Yang H Y.Influence of organic inhibitiors on the corrosion behavior of steel rebar inside mortar specimens immersed in saturated Na Cl solution[J].Acta Physico-chimica Sinica,2010,26(9):2354-2630.
[14]李全安,陈晓亚,刘文健,等.复合添加Sm与Nd对AZ81镁合金组织和性能的影响[J].稀土,2015,36(2):36-41.Li Q A,Chen X Y,Liu W J,et al.Effects of Sm and Nd on microstructure and properties of AZ81 magnesium alloy[J].Chinese Rare Earths,2015,36(2):36-41.
[15]杨吉春,杨昌桥,贾利涛.铈对IF钢冲击韧性的影响[J].稀土,2014,35(3):19-22.Yang J C,Yang C Q,Jia L T.Effect of rare earth element Ce on impact toughness of IF steel[J].Chinese Rare Earths,2014,35(3):19-22.