氢对纯镍及690合金在弱碱性溶液中电化学行为的影响
Effects of Hydrogen on Electrochemical Behavior of Nickel and Alloy 690 in Weak Alkaline Solution
摘 要
采用电化学方法研究了预充氢对690合金在25,50,70 ℃下弱碱性溶液中电化学行为的影响。结果表明,预充氢使得690合金在碳酸氢钠溶液中的自腐蚀电位负移、电化学阻抗降低,尽管不影响阳极极化曲线的形状,但增大了阳极极化曲线中一次过钝化电位之前的阳极电流密度。此外,预充氢使镍在碳酸氢钠溶液中的阳极极化曲线出现新的阳极电流峰,增大了阳极极化曲线中过钝化电位之前的电流密度,并降低了电化学阻抗。氢对金属或合金电化学行为的作用与电极反应类型、速率控制步骤以及表面膜的稳定性有关。
氢
弱碱性溶液
电化学腐蚀
nickel-based alloy 690
hydrogen
weak alkaline solution
electrochemical corrosion
Abstract
The effects of pre-charged hydrogen on electrochemical behavior of Alloy 690 in a slightly alkaline solution at 25,50 and 70 ℃ were investigated by electrochemical methods. The results showed that pre-charged hydrogen shifted the open circuit potential in the negative direction,decreased the electrochemical impedance,did not affect the shape of the anodic polarization curve,increased the current density in the anodic polarization curve at potentials before the first transpassivation potential for alloy 690 in a bicarbonate solution. Pre-charged hydrogen caused a new current peak,increased the current density at potentials before the transpassivation potential for nickel,and decreased the electrochemical impedance for alloy 690 in a bicarbonate solution. The effects of hydrogen on electrochemical behavior of metals or alloys were related to the types of electrode reactions,the rate-determining steps and the stability of surface films.
中图分类号 TG174
所属栏目 试验研究
基金项目 教育部博士点基金项目(20123108110021);核燃料与材料重点实验室基金项目;上海市浦江人才计划(12PJ1403600)
收稿日期 2014/2/19
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联系人作者吕战鹏(zplu@shu.edu.cn)
备注吕战鹏(1967-),研究员,博士,从事材料腐蚀与防护研究,021-56336107.
引用该论文: XIA Xiao-feng,LU Zhan-peng,CHEN Jun-jie,XIAO Qian,XIONG Ru,XIA Shuang,YAO Mei-yi,ZHOU Bang-xin. Effects of Hydrogen on Electrochemical Behavior of Nickel and Alloy 690 in Weak Alkaline Solution[J]. Corrosion & Protection, 2015, 36(1): 36
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【2】BAMFORD W,PALMN A. Service experience with alloy 600 and associated welds in operating PWRs,including repair activities and regulatory and code actions[C]//Proc.13th Inter.Conf.Environmental Degradation of Materials in Nuclear Power Systems-Water Reactors,ANS,2009,CDROM.
【3】ANDRESEN P L,MORRA M M,AHLUWALIA K. SCC of Alloy 690 and its weld Metals[C]//Proc.5th Int.Conf.Environmental Degradation of Materials in Nuclear Power Systems-Water Reactors,TMS,2011,CDROM.
【4】SHOJI T,LU Z P,YAMAZAKI S. The effect of strain-hardening on PWSCC ofnickel-base Alloys 600 and 690[C]//Proc.14th Int.Conf.Environmental Degradation of Materials in Nuclear Power Systems-Water Reactors,ANS,2009,CDROM.
【5】韩恩厚,王俭秋,吴欣强,等. 核电高温高压水中不锈钢和镍基合金的腐蚀机制[J].金属学报,2010,46(11):1379-1390.
【6】HASEGAWA M,OSAWA M. Anomalous corrosion of austenitic stainless steel exposed at high temperature and pressure[J].Corrosion 1980,36(2):67-73.
【7】胡小丽,黄震中,乔利杰,等. 氢和应力对阳极溶解的影响[J].中国腐蚀与防护学报,1996,16(3):187-194.
【8】QIAO L J,LUO J L. Hydrogen-facilitated anodic dissolution of austenitic stainless steels[J].Corrosion,1998,54(4):281-288.
【9】曾一民,乔利杰,褚武扬. 氢对310不锈钢钝化膜的影响[J].中国腐蚀与防护学报,1999,19(4):233-238.
【10】曾一民,乔利杰,林昌健,等. 氢对纯镍钝化膜的影响[J].中国腐蚀与防护学报,1999,19(6):321-326.
【11】曾一民,乔利,杨迈之,等. 氢对纯铁钝化膜电子性质的影响[J].中国腐蚀与防护学报,2000,20(2):74-80.
【12】YANG Q,LUO J L. Effects of hydrogen on disorder of passive films and pitting susceptibility of type 310 stainless steel[J].J Electrochem Soc,2001,148(1):B29-B35.
【13】YU J G,ZHANG C S,LUO J L,et al. Investigation of the effect of hydrogen on the passive film on iron by surface analysis techniques[J].J Electrochem Soc,2003,150(2):B68-B75.
【14】YU J G,ZHANG C S,LUO J L. NORTON P R. Photoelectrochemical study of hydrogen-loaded passive film[J].J Electrochem Soc,2003,150(8):B405-B411.
【15】YU J G,LUO J L,NORTON P R. Electrochemical investigation of the effects of hydrogen on the stability of the passive film on iron[J].Electrochimica Acta,2002,47(10):1527-1536.
【16】DANT C,LU Z P,SHOJI T,et al. Effects of hydrogen on the anodic behavior of Alloy 690 at 60 ℃[J].Corros Sci,2010,52(4):228-1236.
【17】QIAO L J,MAO X. Thermodynamic analysis on the role of hydrogen in anodic stress corrosion cracking[J].Acta Metall Mater,1995,43(1):4001-4006.
【18】MAO S X,GU B,WU N Q,et al. The mechanism of hydrogen facilitated anodic dissolution type stress corrosion cracking (theories and experiments)[J].Philos Mag A,2001,81(7):1813-1831.
【19】褚武扬,乔利杰,陈奇志,等. 断裂与环境断裂[M].北京:科学出版社,2000:178-189.
【20】LU B T,LUO J L,NORTONP R,et al. Effects of dissolved hydrogen and elastic and plastic deformation on active dissolution of pipeline steel in anaerobic ground water of near-neutral pH[J].Acta Materialia,2009,57(1):41-49.
【21】LU B T,QIAO L J,LUO J L,et al. Role of hydrogen in stress corrosion cracking of austenitic stainless steels[J].Philosophical Magazine,2011,91(2):208-228.
【22】DASN K,SHOJI T. An atomic study of hydrogen effect on the early stage oxidation of transition metal surfaces[J].Int J Hydrogen Energy,2013,38(3):1644-1656.
【23】SHOJI T,LU Z,TAKEDA Y,et al. Quantification of mechano-chemical interactions at multi-scales and theoretical modeling of stress corrosion cracking initiation and short crack growth.Proc.the SCC Initiation Workshop[C]//Beaune,Burgundy,France,2008,EPRI,CDROM.
【24】LU Z P,HUANG C B,HUANG D L,et al. Effects of a magnetic field on the anodic dissolution,passivation and transpassivation behaviour of iron in weakly alkaline solutions with or without halides[J].Corros Sci,2006,48(10):3049-3077.
【25】杨熙珍,杨武. 金属腐蚀电化学热力学电位-pH图及其应用[M].北京:化学工业出版社,1991:78-137.
【26】曹楚南. 腐蚀电化学原理[M].北京:化学工业出版社,第二版,2004.
【27】李成涛,程学群,董超芳,等. pH值对690合金钝化膜电化学性能的影响[J].材料保护,2010,43(12):4-7.
【28】张鉴清. 电化学测试技术[M].北京:化学工业出版社,2010.
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