D0L:10.13374.issn1001-053x.2013.06.008 第35卷第6期 北京科技大学学报 Vol.35 No.6 2013年6月 Journal of University of Science and Technology Beijing Jun.2013 AF1410钢电子束焊接件在模拟海洋环境中的腐蚀 行为 郝雪龙1)凶，张东晖)，刘建华2)，李松梅)，于美) 1)北京有色金属研究总院国家有色金属及电子材料分析测试中心，北京100088 2)北京航空航天大学材料科学与工程学院空天材料与服役教育部重点实验室，北京100191 ☒通信作者，E-mail:xhao@mse.buaa.cdu.cn 摘要采用中性盐雾试验模拟海洋环境，研究了AF1410钢电子束焊接接头不同位置、不同暴露时间的腐蚀电化学阻 抗谱特征，并结合电子束焊接接头组织结构分析评价了焊缝熔合区及母材的耐腐蚀性能及电化学行为.开路电位及阻抗 谱研究表明，焊缝熔合区的粗大回火马氏体和析出碳化物易构成腐蚀电池，比基材腐蚀反应阻力小，易引起电化学腐蚀 建立了不同腐蚀阶段的阻抗谱等效电路，并对其进行了拟合 关键词钢腐蚀：大气腐蚀：电子束焊：电化学阻抗谱：等效电路 分类号TG456.3 Corrosion of AF1410 steel electron beam welding joints in simulated marine environment HAO Xue-long 1),ZHANG Dong-hui1),LIU Jian-hua2),LI Song-mei2),YU Mei2) 1)National Center of Analysis and Testing for Non-ferrous Metals Electronic Materials,General Research Institute for Nonferrous Metals,Beijing 100088,China 2)Key Laboratory of Aerospace Materials and Performance(Ministry of Education),School of Materials Science and Engineering, Beihang University,Beijing 100191,China Corresponding author,E-mail:xlhao@mse.buaa.edu.cn ABSTRACT The corrosion electrochemical impedance spectroscopy characteristics of AF1410 steel electron beam welding joints at different positions and for different exposure time were investigated in a simulated marine environment by neutral salt spray testing.The corrosion resistance and the electrochemical behaviors of the weld fusion zone and the base metal were evaluated according to the microstructure analysis of the welded joints.The investigation of open circuit potential and impedance spectroscopy indicates that thick tempered martensite and carbide precipitates at the weld fusion zone are easy to form a corrosion cell,and the corrosion reaction resistance is less than that of the base metal,which easily leads to electrochemical corrosion.Equivalent circuits of impedance spectroscopy were established and fitted for the different corrosion stages. KEY WORDS steel corrosion:atmospheric corrosion;electron beam welding:electrochemical impedance spec- troscopy;equivalent circuits 广泛应用于航空领域的Co-Ni超高强合金钢 welded,EBW)技术焊接后仍有优良的力学性能.但 AF1410经热处理后具有高强度、高韧性等优异的 是，除了其诸多优点，该材料及其结构在使用过程 力学性能-)，采用具有高能密度、高熔透性、 中也有其局限性，即对腐蚀环境相当敏感4-刀.刘 变形小以及易于控制的电子束焊接(electron beam 建华等8-)对AF1410钢电子束焊接接头在中性盐 收稿日期：2012-03-05 基金项目：国家自然科学基金资助项目(61001007)第 35 卷 第 6 期 北 京 科 技 大 学 学 报 Vol. 35 No. 6 2013 年 6 月 Journal of University of Science and Technology Beijing Jun. 2013 AF1410 钢电子束焊接件在模拟海洋环境中的腐蚀 行为 郝雪龙1) ，张东晖1)，刘建华2)，李松梅2)，于 美2) 1) 北京有色金属研究总院国家有色金属及电子材料分析测试中心，北京 100088 2) 北京航空航天大学材料科学与工程学院空天材料与服役教育部重点实验室，北京 100191 通信作者，E-mail: xlhao@mse.buaa.edu.cn 摘 要 采用中性盐雾试验模拟海洋环境，研究了 AF1410 钢电子束焊接接头不同位置、不同暴露时间的腐蚀电化学阻 抗谱特征，并结合电子束焊接接头组织结构分析评价了焊缝熔合区及母材的耐腐蚀性能及电化学行为. 开路电位及阻抗 谱研究表明，焊缝熔合区的粗大回火马氏体和析出碳化物易构成腐蚀电池，比基材腐蚀反应阻力小，易引起电化学腐蚀. 建立了不同腐蚀阶段的阻抗谱等效电路，并对其进行了拟合. 关键词 钢腐蚀；大气腐蚀；电子束焊；电化学阻抗谱；等效电路 分类号 TG456.3 Corrosion of AF1410 steel electron beam welding joints in simulated marine environment HAO Xue-long 1) , ZHANG Dong-hui 1), LIU Jian-hua 2), LI Song-mei 2), YU Mei 2) 1) National Center of Analysis and Testing for Non-ferrous Metals & Electronic Materials, General Research Institute for Nonferrous Metals, Beijing 100088, China 2) Key Laboratory of Aerospace Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beihang University, Beijing 100191, China Corresponding author, E-mail: xlhao@mse.buaa.edu.cn ABSTRACT The corrosion electrochemical impedance spectroscopy characteristics of AF1410 steel electron beam welding joints at different positions and for different exposure time were investigated in a simulated marine environment by neutral salt spray testing. The corrosion resistance and the electrochemical behaviors of the weld fusion zone and the base metal were evaluated according to the microstructure analysis of the welded joints. The investigation of open circuit potential and impedance spectroscopy indicates that thick tempered martensite and carbide precipitates at the weld fusion zone are easy to form a corrosion cell, and the corrosion reaction resistance is less than that of the base metal, which easily leads to electrochemical corrosion. Equivalent circuits of impedance spectroscopy were established and fitted for the different corrosion stages. KEY WORDS steel corrosion; atmospheric corrosion; electron beam welding; electrochemical impedance spec￾troscopy; equivalent circuits 广泛应用于航空领域的 Co-Ni 超高强合金钢 AF1410 经热处理后具有高强度、高韧性等优异的 力学性能 [1−3]， 采用具有高能密度、 高熔透性、 变形小以及易于控制的电子束焊接 (electron beam welded, EBW) 技术焊接后仍有优良的力学性能. 但 是，除了其诸多优点，该材料及其结构在使用过程 中也有其局限性，即对腐蚀环境相当敏感 [4−7] . 刘 建华等 [8−9] 对 AF1410 钢电子束焊接接头在中性盐 收稿日期：2012–03–05 基金项目：国家自然科学基金资助项目 (51001007) DOI:10.13374/j.issn1001-053x.2013.06.008