张振,胡正飞,Preet M. Singh.氯离子对9Cr马氏体钢静态腐蚀和应力腐蚀行为的影响[J].表面技术,2019,48(12):296-303.
ZHANG Zhen,HU Zheng-fei,Preet M. Singh.Effects of Chloride Ions on Static and Stress Corrosion Behaviors of 9Cr Martensitic Steel[J].Surface Technology,2019,48(12):296-303
氯离子对9Cr马氏体钢静态腐蚀和应力腐蚀行为的影响
Effects of Chloride Ions on Static and Stress Corrosion Behaviors of 9Cr Martensitic Steel
投稿时间:2019-05-19  修订日期:2019-12-20
DOI:10.16490/j.cnki.issn.1001-3660.2019.12.036
中文关键词:  马氏体钢  氯离子  静态腐蚀  微区电化学  应力腐蚀  力化耦合
英文关键词:martensitic steel  chloride ions  static corrosion  micro electrochemical  stress corrosion  mechanical-electrical coupling
基金项目:国家自然科学基金青年科学基金(51801098);江苏省高等学校自然科学研究面上项目(18KJB130003);江苏省先进结构材料与应用技术重点实验室开放基金(ASMA201906)
作者单位
张振 1.南京工程学院,南京 211167;2.江苏省先进结构材料与应用技术重点实验室,南京 211167 
胡正飞 3.同济大学,上海 201804 
Preet M. Singh 4.Georgia Institute of Technology, Atlanta 30332, America 
AuthorInstitution
ZHANG Zhen 1.Nanjing Institute of Technology, Nanjing 211167, China; 2.Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology, Nanjing 211167, China 
HU Zheng-fei 3.Tongji University, Shanghai 201804, China 
Preet M. Singh 4.Georgia Institute of Technology, Atlanta 30332, America 
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中文摘要:
      目的 研究9Cr马氏体钢在非服役条件下的腐蚀行为。方法 运用传统电化学测试和微区扫描振动电极(SVET)技术研究材料的静态腐蚀行为,采用慢应变速率动态拉伸腐蚀试验与传统电化学测试技术相结合的方法研究材料的应力腐蚀行为。结果 获得常温下氯离子对马氏体钢静态腐蚀行为的影响规律,以及慢拉伸过程中材料表面钝化膜生成和破裂过程。结论 马氏体钢在氯化钠溶液中的腐蚀为阳极溶解型,且随着氯离子浓度的上升,局部腐蚀电流密度增大。常温下材料在含氯离子环境中发生弹性变形时,表面生成的钝化膜使材料的抗腐蚀性能升高。当材料进入塑性变形阶段后,由于金属表面缺陷的增多、颈缩区体积的收缩,以及钝化膜与基体金属塑性变形能力的差异,钝化膜逐渐溶解并发生破裂。
英文摘要:
      The paper aims to study the corrosion behaviors of 9Cr martensitic steel under non-service conditions. The static corrosion behavior of the steel was studied by the traditional electrochemical testing technique and scanning vibrating electrode technique (SVET). The slow strain rate test (SSRT) accompanied with electrochemical tests were used to research stress corrosion behavior of martensitic steel. The effect of chloride ion on the static corrosion behavior of martensitic steel at room temperature, and the formation and breakdown of passivation film on the surface of material during SSRT were obtained. The corrosion behavior of martensitic steel in chloride environment belongs to the anodic dissolution. The local corrosion current density increases with the increase of chloride content in the environment. The results of SSRT show that the corrosion resistance of material increases during the elastic stage of SSRT due to the formation of passive film on the surface of material at room temperature. When the material enters the plastic deformation stage, the passive film is broken down due to the increase of defects on the surface of metal, the occurrence of necking zone and the deformability difference between the metal and the passive film.
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