氯和氢对新型超高强度Cr12Ni4Mo2Co14钢在酸性环境中电化学腐蚀行为的影响
Influence of Chloride and Hydrogen on Electrochemical Corrosion Behavior of a New Kind of Ultrahigh Strength Steel Cr12Ni4Mo2Co14 in Acid Environment
摘 要
采用极化曲线、电化学阻抗和Mott-Schottky等电化学试验研究了酸性环境中Cl-和氢对一种新型超高强度Cr12Ni4Mo2Co14钢电化学腐蚀行为的影响。结果表明：Cl-和氢均对Cr12Ni4Mo2Co14钢的阳极钝化区产生影响，随着Cl-含量和氢含量的增加，点蚀电位负向移动，钝化区间缩短；Cl-通过占据氧空位促进钝化膜中形成Schottky空位对，而金属离子空位聚集会引起钝化膜的破坏；与未充氢Cr12Ni4Mo2Co14钢相比，充氢Cr12Ni4Mo2Co14钢中的施主和受主密度均有所提高，导致阳离子空位浓度提高，局部阳离子空位的聚集可诱导钝化膜的击穿。
氢
氯离子
钝化
ultrahigh strength steel
hydrogen
chloride ion
passivation
Abstract
The electrochemical corrosion behavior of a new kind of ultrahigh strength steel Cr12Ni4Mo2Co14 in acid environment was studied by electrochemical methods of polarization curves testing, electrochemical impedance spectroscopy (EIS) testing and Mott-Schottky testing. Both chloride ion and hydrogen can affect the anode passivation zone of Cr12Ni4Mo2Co14 steel. With the increase of concentrations of chloride ion and hydrogen, the pitting potential moved negatively and the passivation zone was narrowed. The Schottky pairs were formed by chloride ions occupying vacancies of oxygen. Vacancies of metal ions gathered, which broke the passive film. Donor and acceptor densities of hydrogen-charged Cr12Ni4Mo2Co14 steel increased in comparison with those of non hydrogen-charged Cr12Ni4Mo2Co14 steel, which increased the concentration of positive ion vacancy. Then the passive film can be broken by the gather of positive ion vacancies at local area.
中图分类号 TG172.3 DOI 10.11973/fsyfh-201712011
所属栏目 试验研究
基金项目 国家自然科学基金项目（51501041）
收稿日期 2016/3/16
修改稿日期
网络出版日期
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引用该论文: SUN Min,XU Wenliang,LI Jin. Influence of Chloride and Hydrogen on Electrochemical Corrosion Behavior of a New Kind of Ultrahigh Strength Steel Cr12Ni4Mo2Co14 in Acid Environment[J]. Corrosion & Protection, 2017, 38(12): 953
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【4】OLSSON C O A,LANDOLT D. Passive films on stainless steels-chemistry,structure and growth[J]. Electrochimica Acta,2003,48(9):1093-1104.
【5】郝献超,苏鹏,肖葵,等. 不同NaCl浓度对耐候钢腐蚀产物的影响[J]. 腐蚀与防护,2009,30(5):297-299.
【6】周克崧,邓春明,刘敏,等. 300M钢基体上高速火焰喷涂WC-17Co和WC-10Co4Cr涂层的疲劳和抗盐雾腐蚀性能[J]. 稀有金属材料与工程,2009,38(4):671-676.
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【8】柯伟,李劲. 腐蚀疲劳裂尖材料损伤研究[J]. 腐蚀与防护,1999,20(3):103-107.
【9】RAMADAN S,GAILLET L,TESSIER C,et al. Detection of stress corrosion cracking of high-strength steel used in prestressed concrete structures by acoustic emission technique[J]. Appl Surf Sci,2008,254(8):2255-2261.
【10】ELIAZ N,SHACHAR A,TAL B,et al. Characteristics of hydrogen embrittlement,stress corrosion cracking and tempered martensite embrittlement in high-strength steels[J]. Eng Fail Anal,2002,9(2):167-184.
【11】孙敏,肖葵,董超芳,等. 带腐蚀产物超高强度钢的电化学行为[J]. 金属学报,2011,47(4):442-448.
【12】MACDONALD D D,ISMAIL K M,SIKORA E. Characterization of the passive state on zinc[J]. Journal of the Electrochemical Society,1998,145(9):3141-3149.
【13】MACDONALD D D. The point defect model for the passive state[J]. Journal of the Electrochemical Society,1992,139(12):3434-3449.
【14】LUO H,DONG C F,XIAO K,et al. Characterization of passive film on 2205 duplex stainless steel in sodium thiosulphate solution[J]. Applied Surface Science,2011,258(1):631-639.
【15】TSUCHIYA H,FUJIMOTO S. Semiconductor properties of passive films formed on sputter-deposited Fe-18Cr alloy thin films with various additive elements[J]. Science and Technology of Advanced Materials,2004,5(1/2):195-200.
【16】HAKIKI N E,BELO M D C,SIMOES A M P,et al. Semiconducting properties of passive films formed on stainless steels[J]. Journal of the Electrochemical Society,1998,145(11):3821-3829.
【17】YANG Q,LUO J L. The hydrogen-enhanced effects of chloride ions on the passivity of type 304 stainless steel[J]. Electrochimica Acta,2000,45(24):3927-3937.
【18】YANG Q,LUO J L. Effects of hydrogen and tensile stress on the breakdown of passive films on type 304 stainless steel[J]. Electrochimica Acta,2001,46(6):851-859.
【19】SUN M,XIAO K,DONG C F,et al. Effect of stress on electrochemical characteristics of pre-cracked ultrahigh strength stainless steel in acid sodium sulphate solution[J]. Corrosion Science,2014,89(8):137-145.
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