杨光,孔德军,叶存冬,谢春洋,郭皓元

• 1:常州大学机械工程学院
• 2:常州大学石油化工学院

摘要(Abstract)：

利用扫描电镜对X70管线钢焊接接头微观结构进行了观察,采用中性5%连续盐雾试验考察了其焊接接头表面的腐蚀性能,分析了X70管线钢焊接接头在盐雾介质中腐蚀行为,对点蚀坑内腐蚀产物进行EDS分析,探讨了X70管线钢焊接接头表面点蚀机理。结果表明,X70管线钢焊接接头在盐雾环境中耐蚀性低,容易诱发局部点蚀,Cl-对X70管线钢焊接接头的腐蚀起主导作用;其腐蚀过程主要由表面点蚀、形成腐蚀产物层、裸露的焊接接头表面腐蚀等3个部分组成,其中点蚀是裂纹萌生和扩展的主要来源;腐蚀产物主要是由Fe的氧化物和少量Fe的氯化物构成,其形成的氧化膜提高了其防盐雾腐蚀能力。

关键词(KeyWords)： X70管线钢;焊接接头;盐雾腐蚀;腐蚀产物

Abstract:

Keywords:

基金项目(Foundation): 江苏省科协首席专家(工程师)项目;; 中国学位与研究生教育学会研究课题(C1-2013Y07-051)

作者(Author): 杨光,孔德军,叶存冬,谢春洋,郭皓元

DOI: 10.13289/j.issn.1009-6264.2014.08.028

参考文献(References)：

• [1]张骁勇,高惠临,徐学利,等.X80大变形管线钢的变形与断裂行为[J].材料热处理学报,2014,35(2):75-81.ZHANG Xiao-yong,GAO Hui-lin,XU Xue-li,et al.Deformation and fracture behavior of X80 pipeline steel with excellent deformability[J].Transactions of Materials and Heat Treatment,2014,35(2):75-81.
• [2]张国春,朱海宝,武会宾,等.强韧X80管件钢的组织和力学性能[J].材料热处理学报,2011,32(4):64-69.ZHANG Guo-chun,ZHU Hai-bao,WU Hui-bin,et al.Microstructure and properties of X80 pipe fitting steel[J].Transactions of Materials and Heat Treatment,2011,32(4):64-69.
• [3]ZHANG G A,CHENG Y F.Micro-electrochemical characterization and Mott-Schottky analysis of corrosion of welded X70 pipeline steel in carbonate/bicarbonate solution[J].Electrochimica Acta,2009,55(15):316-324.
• [4]LIU Zhi-yong,LI Xiao-gang,ZHANG Ying-rui,et al.Relationship between electrochemical characteristics and SCC of X70 pipeline steel in an acidic soil simulated solution[J].Acta Metallurgica Sinica:English Letters,2009,22(1):58-64.
• [5]LIU Z Y,LI X G,DU C W,et al.Effect of inclusions on initiation of stress corrosion cracks in X70 pipeline steel in an acidic soil environment[J].Corrosion Science,2009,51(4):895-900.
• [6]孔德军,吴永忠,付贵忠,等.X70管线钢渗铝层盐雾腐蚀后能谱面扫描分析[J].材料热处理学报,2013,34(6):125-129.KONG De-jun,WU Yong-zhong,FU Gui-zhong,et al.EDS analysis of aluminized coatings on X70 pipeline steel after salt spray corrosion[J].Transactions of Materials and Heat Treatment,2013,34(6):125-129.
• [7]李红英,康巍,胡继东,等.X70和X80管线钢的电化学腐蚀行为[J].材料热处理学报,2011,32(10):151-158.LI Hong-ying,KANG Wei,HU Ji-dong,et al.Electrochemical corrosion behaviour of grade X70 and X80 pipeline steels[J].Transactions of Materials and Heat Treatment,2011,32(10):151-158.
• [8]梁平,李晓刚,杜翠薇,等.Cl-对X80管线钢在NaHCO3溶液中腐蚀性能的影响[J].北京科技大学学报,2008,30(7):735-739.LIANG Pin,LI Xiao-gang,DU Cui-wei,et al.Influence of chloride ions on the corrosion resistance of X80 pipeline steel in NaHCO3solution[J].Journal of University of Science and Technology Beijing,2008,30(7):735-739.
• [9]吴永忠,龙丹,孔德军.热浸渗铝处理后X70管线钢盐雾腐蚀行为[J].四川大学学报:工程科学版,2011,43(S1):218-222.WU Yong-zhong,LONG Dan,KONG De-jun.Salt spray corrosion behaviors of X70 pipeline steel by hot-dipped-aluminum treatment[J].Journal of Sichuan University:Engineering Science Edition,2011,43(S1):218-222.
• [10]杨仲年,张昭,苏景新,等.耐候钢在2.0%NaCl中性溶液中的腐蚀过程[J].金属学报,2005,41(8):860-864.YANG Zhong-nian,ZHANG Zhao,SU Jing-xin,et al.Corrosion processes of weathering steels in 2.0%NaCl neutral solutions[J].Acta Metallurgica Sinica,2005,41(8):860-864.
• [11]赵鹏翔,左秀荣,陈康,等.X80大变形管线钢的腐蚀行为[J].材料热处理学报,2013,34(SⅡ):222-226.ZHAO Peng-xiang,ZUO Xiu-rong,CHEN Kang,et al.Corrosion behavior of X80 pipeline steel with strain-based design[J].Transactions of Materials and Heat Treatment,2013,34(SⅡ):222-226.
• [12]宋义全,杜翠薇,张新,等.Cl-浓度对X70管线钢缝隙腐蚀的影响[J].金属学报,2009,45(9):1130-1134.SONG Yi-quan,DU Cui-wei,ZHANG Xin,et al.Influence of Cl-concentration on crevice corrosion of X70 pipeline steel[J].Acta Metallurgica Sinica,2009,45(9):1130-1134.

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