工程科学学报，第37卷，第10期：1344-1349,2015年10月 Chinese Journal of Engineering,Vol.37,No.10:1344-1349,October 2015 DOI:10.13374/j.issn2095-9389.2015.10.014:http://journals.ustb.edu.cn NC30Fe合金在氯化钠溶液中的微动腐蚀特性 李放，任平弟四，张晓宇，向红先，任思聪，蔡振兵 西南交通大学机械工程学院摩擦学研究所，成都610031 ☒通信作者，Emai:pd@swjtu.ed加.cn 摘要在PLNT微动磨损试验机上附加电化学测试系统，采用十字交叉接触方式，位移幅值为100um,法向载荷20、50和 80N条件下，研究NC30F合金传热管在氯化钠溶液中的微动腐蚀行为.使用电化学工作站记录微动腐蚀过程中开路电位变 化，运用电位扫描法测量微动过程的极化曲线：采用扫描电子显微镜观察磨痕的表面形貌，光学轮廓仪测定磨痕的三维形貌 及磨损量.微动磨损使损伤区域金属原子活性增大，腐蚀倾向增大，加速了NC30Fe合金的腐蚀.在氯化钠溶液中，NC30Fe合 金由于微动磨损过程产生腐蚀产物膜起到润滑减摩作用，摩擦系数较纯水中降低：但因腐蚀与磨损的交互作用，在氯化钠溶 液中的磨损量比纯水中高.氯化钠溶液中的磨损机制主要表现为磨粒磨损和剥层的共同作用. 关键词镍铬铁合金：氯化钠溶液；微动腐蚀；腐蚀特性：极化曲线：交互作用 分类号TG146.1·5 Fretting corrosion characteristics of NC30Fe alloy in a sodium chloride solution LI Fang,REN Ping-di,ZHANG Xiao-yu,XIANG Hong-xian,REN Si-cong,CAl Zhen-bing Tribology Research Institute,Southwest Jiaotong University,Chengdu 610031,China Corresponding author,E-mail:rpd@swjtu.edu.cn ABSTRACT By adding an electrochemical test system on a PLINT fretting wear test machine,the fretting corrosion behavior of an NC30Fe heat transfer tube in a sodium chloride solution was investigated using cross-contacting configuration under different loading conditions,i.e.,three different normal loads of 20,50 and 80N with a 100 pm reciprocating amplitude.An electrochemical worksta- tion was used to record the open circuit potential during the fretting corrosion process,and the polarization curves were measured by the potential scanning method.The morphology of wear scars was observed by scanning electron microscopy.The 3D morphology and wear volume loss were determined by optical profilometry.It is found that metal atoms in the worn area are more active and more prone to corrosion because of fretting motion,leading to accelerated corrosion of NC30Fe alloy.As a result of lubrication action by the corro- sion product film,the friction coefficient in the sodium chloride solution is smaller than that in pure water.However,the wear volume loss in the sodium chloride solution is greater than that in pure water due to the interaction of corrosion and wear.Abrasive wear and delamination are considered to be the main wear mechanism in the sodium chloride solution. KEY WORDS nickel chromium iron alloys:sodium chloride solutions:fretting corrosion:corrosion characteristics:polarization curves:interaction 微动腐蚀是腐蚀性介质（如海水、酸雨和腐蚀性管与支撑部件因为流致振动而发生微动破坏.核 气氛)中发生的微动损伤现象0，材料受到磨损和腐 电站二回路水主要通过全挥发处理技术除去有害杂 蚀协同作用的双重损害。核电蒸汽发生器传热管是一 质可，达到降低腐蚀的目的.然而杂质可能在核电系 回路和二回路的屏障，运行环境复杂四.在二回路中， 统运行过程中进入二次侧水中因.核电蒸汽发生器 收稿日期：201406-01 基金项目：国家自然科学基金资助项目(51075324)工程科学学报，第 37 卷，第 10 期: 1344--1349，2015 年 10 月 Chinese Journal of Engineering，Vol． 37，No． 10: 1344--1349，October 2015 DOI: 10． 13374 /j． issn2095--9389． 2015． 10． 014; http: / /journals． ustb． edu． cn NC30Fe 合金在氯化钠溶液中的微动腐蚀特性 李 放，任平弟，张晓宇，向红先，任思聪，蔡振兵 西南交通大学机械工程学院摩擦学研究所，成都 610031 通信作者，E-mail: rpd@ swjtu． edu． cn 摘 要 在 PLINT 微动磨损试验机上附加电化学测试系统，采用十字交叉接触方式，位移幅值为 100 μm，法向载荷 20、50 和 80 N 条件下，研究 NC30Fe 合金传热管在氯化钠溶液中的微动腐蚀行为． 使用电化学工作站记录微动腐蚀过程中开路电位变 化，运用电位扫描法测量微动过程的极化曲线; 采用扫描电子显微镜观察磨痕的表面形貌，光学轮廓仪测定磨痕的三维形貌 及磨损量． 微动磨损使损伤区域金属原子活性增大，腐蚀倾向增大，加速了 NC30Fe 合金的腐蚀． 在氯化钠溶液中，NC30Fe 合 金由于微动磨损过程产生腐蚀产物膜起到润滑减摩作用，摩擦系数较纯水中降低; 但因腐蚀与磨损的交互作用，在氯化钠溶 液中的磨损量比纯水中高． 氯化钠溶液中的磨损机制主要表现为磨粒磨损和剥层的共同作用． 关键词 镍铬铁合金; 氯化钠溶液; 微动腐蚀; 腐蚀特性; 极化曲线; 交互作用 分类号 TG146. 1 + 5 Fretting corrosion characteristics of NC30Fe alloy in a sodium chloride solution LI Fang，ＲEN Ping-di  ，ZHANG Xiao-yu，XIANG Hong-xian，ＲEN Si-cong，CAI Zhen-bing Tribology Ｒesearch Institute，Southwest Jiaotong University，Chengdu 610031，China Corresponding author，E-mail: rpd@ swjtu． edu． cn ABSTＲACT By adding an electrochemical test system on a PLINT fretting wear test machine，the fretting corrosion behavior of an NC30Fe heat transfer tube in a sodium chloride solution was investigated using cross-contacting configuration under different loading conditions，i． e． ，three different normal loads of 20，50 and 80 N with a 100 μm reciprocating amplitude． An electrochemical worksta￾tion was used to record the open circuit potential during the fretting corrosion process，and the polarization curves were measured by the potential scanning method． The morphology of wear scars was observed by scanning electron microscopy． The 3D morphology and wear volume loss were determined by optical profilometry． It is found that metal atoms in the worn area are more active and more prone to corrosion because of fretting motion，leading to accelerated corrosion of NC30Fe alloy． As a result of lubrication action by the corro￾sion product film，the friction coefficient in the sodium chloride solution is smaller than that in pure water． However，the wear volume loss in the sodium chloride solution is greater than that in pure water due to the interaction of corrosion and wear． Abrasive wear and delamination are considered to be the main wear mechanism in the sodium chloride solution． KEY WOＲDS nickel chromium iron alloys; sodium chloride solutions; fretting corrosion; corrosion characteristics; polarization curves; interaction 收稿日期: 2014--06--01 基金项目: 国家自然科学基金资助项目( 51075324) 微动腐蚀是腐蚀性介质( 如海水、酸雨和腐蚀性 气氛) 中发生的微动损伤现象［1］，材料受到磨损和腐 蚀协同作用的双重损害． 核电蒸汽发生器传热管是一 回路和二回路的屏障，运行环境复杂［2］． 在二回路中， 管与支撑部件因为流致振动而发生微动破坏［3--4］． 核 电站二回路水主要通过全挥发处理技术除去有害杂 质［5］，达到降低腐蚀的目的． 然而杂质可能在核电系 统运行过程中进入二次侧水中［6］． 核电蒸汽发生器