Cu、Ni元素对耐蚀高锰阻尼钢在大气环境中腐蚀行为的影响  

Effects of Cu and Ni on Corrosion Behavior of Corrosion-resistant High-manganese Damping Steel in Atmospheric Environment

作　　者：孙美慧 李江文 刘文月 郭呈宇 李天怡 徐学旭 SUN Meihui;LI Jiangwen;LIU Wenyue;GUO Chengyu;LI Tianyi;XU Xuexu(Ansteel Beijing Research Institute Co.,Ltd.,Beijing 102200,China;Collaborative Innovation Center of Steel Technology,University of Science and Technology Beijing,Beijing 100038,China;School of Materials Science and Engineering,China University of Petroleum(East China),Qingdao 266580,China)

机构地区：[1]鞍钢集团北京研究院有限公司,北京102200 [2]北京科技大学钢铁共性技术协同创新中心,北京100038 [3]中国石油大学(华东)材料科学与工程学院,青岛266580

出　　处：《中国表面工程》2024年第2期27-40,共14页China Surface Engineering

基　　金：国家重点研发计划(2021YFB3701701);中国博士后科学基金(2023M733875);山东博士后科学基金(SDBX2023016)。

摘　　要：高锰阻尼钢因其高强度、超低屈强比、阻尼性能良好和经济性能优异等特性,在承受较大振动和冲击的桥梁、轨道交通和军工等领域展现出广阔的应用前景。而高锰钢耐蚀性能欠佳一直是限制其快速发展的关键性因素,高锰钢耐蚀性设计及其大气腐蚀行为研究均鲜有报道。为解决高锰钢耐蚀性能欠佳问题,采用真空感应熔炼和两阶段轧制工艺制备3种添加不同Cu、Ni元素含量的耐蚀高锰阻尼钢,通过大气曝晒试验、电化学测试、SEM、XRD和XPS等方法对试验材料的电化学性能、腐蚀速率、腐蚀形貌、腐蚀产物物相及结构进行表征及分析。结果表明:相较于单独添加Cu元素的高锰阻尼钢,钢中添加1.2 wt.%Cu和1.0 wt.%Ni元素腐蚀电位正移近200 mV,腐蚀电流密度降低近50%;曝晒试验后,较高含量的Cu和Ni元素协同添加使腐蚀产物中α-FeOOH含量明显提高,活性较高的MnFe_(2)O_(4)和Mn_(2)O_(3)含量降低,耐蚀产物NiOOH及CuO含量增加。腐蚀产物颗粒均匀细小,产物层整体致密光滑,保护性能提高,其腐蚀速率相较于单独添加Cu元素的高锰阻尼钢降低70%,表现出优异的耐蚀性能。所提出的高锰阻尼钢耐蚀性的成分设计方案及耐蚀机理可为未来高锰阻尼钢在桥梁中的应用提供数据支持。High-manganese damping steel has shown broad application prospects in fields such as bridges,rail transit,and military industry that withstand large vibrations and impacts owing to its high strength,ultralow yield ratio,good damping performance,and excellent economic performance.However,the poor corrosion resistance of high-manganese steel has always been a key factor limiting its rapid development.To address this problem,three corrosion-resistant high-manganese damping steels with different Cu and Ni contents were prepared using vacuum induction melting and two-stage rolling processes.The electrochemical properties,corrosion rate,corrosion morphology,corrosion product phase,and structure of the test materials were characterized and analyzed through atmospheric exposure tests and electrochemical testing and by using scanning electron microscopy(SEM),X-ray diffraction(XRD),and X-ray photoelectron spectroscopy(XPS)methods.The research results show that compared to the high-manganese damping steel added with Cu only,the one added with Cu and Ni exhibited better electrochemical stability.The addition of 1.2 wt.%Cu and 1.0 wt.%Ni to steel resulted in a positive shift in the corrosion potential of approximately 200 mV and a decrease in the corrosion current density by approximately 50%.After the exposure experiment,the high-manganese damping steel added with Cu and Ni also exhibited better corrosion resistance.Compared to the 8Cu and 8Cu5Ni steels,the corrosion rate of 12Cu10Ni decreased by approximately 70%.Based on the distribution of elements in the three types of steel,Fe,O,Mn,Cu,and Ni were uniformly distributed in the corrosion product layer without noticeable enrichment.The main corrosion products of the three types of steel were composed ofγ-FeOOH,α-FeOOH,Fe_(3)O_(4),Mn_(3)O_(4),and manganese iron oxide(MnFe_(2)O_(4)).In the corrosion product layer,Cu and Ni affected the generation of the main corrosion products,on the one hand,and existed in the form of corrosion-resistant products,such as CuO,NiOOH,and NiO,

关 键 词：高锰阻尼钢 腐蚀行为 大气环境 X射线光电子能谱仪(XPS) 

分 类 号：TG174[金属学及工艺—金属表面处理]