新型00Cr10MoV钢筋在水泥萃取液中的耐氯离子点蚀性能
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摘要
利用开路电位(OCP)、电化学阻抗谱(EIS)与循环动电位极化曲线(CPP)三种方法对比研究了耐蚀钢筋(00Cr10MoV)和普通低碳钢筋(20MnSiV)在水泥萃取液中的耐氯离子点蚀性能,并利用扫描电镜(SEM)对钢筋腐蚀产物与点蚀坑进行形貌表征。结果表明:在含不同氯离子浓度(0.1,0.6mol/L)水泥萃取液中,00Cr10MoV钢筋较20MnSiV钢筋具有更优的耐氯离子侵蚀能力;在氯离子浓度为0.6mol/L的水泥萃取液中腐蚀后,20MnSiV钢筋表面生成大量疏松的腐蚀产物,而00Cr10MoV钢筋表面仅出现少量点蚀坑。
The pitting corrosion resistance to chloride of corrosion-resistant rebar(00Cr10MoV)and plain lowcarbon rebar(20 MnSiV)in cement extract solution was investigated by open circuit potential(OCP),electrochemical impedance spectroscopy(EIS)and cyclic potentiodynamic polarization(CPP)measurements.The morphology of corrosion products and corrosion pits was characterized by scanning electron microscopy(SEM).Results show that compared with 20 MnSiV rebar,00Cr10MoV rebar had better pitting corrosion resistance to chloride in cement extract solution with different concentrations of chloride(0.1,0.6 mol/L).After corroded in cement extract solution with0.6 mol/L chloride,a large amount of corrosion products were observed on the surface of 20 MnSiV rebar,whereas only a few corrosion pits were found on the surface of 00Cr10MoV rebar.
The pitting corrosion resistance to chloride of corrosion-resistant rebar(00Cr10MoV)and plain lowcarbon rebar(20 MnSiV)in cement extract solution was investigated by open circuit potential(OCP),electrochemical impedance spectroscopy(EIS)and cyclic potentiodynamic polarization(CPP)measurements.The morphology of corrosion products and corrosion pits was characterized by scanning electron microscopy(SEM).Results show that compared with 20 MnSiV rebar,00Cr10MoV rebar had better pitting corrosion resistance to chloride in cement extract solution with different concentrations of chloride(0.1,0.6 mol/L).After corroded in cement extract solution with0.6 mol/L chloride,a large amount of corrosion products were observed on the surface of 20 MnSiV rebar,whereas only a few corrosion pits were found on the surface of 00Cr10MoV rebar.
引文
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[2]HUSSAIN R R,ALHOZAIMY A,AL-NEGHEIMISH A,et al.Time-dependent variation of the electrochemical impedance for thermos-mechanically treated versus plain low alloy steel rebars in contact with simulated concrete pore solution[J].Construction and Building Materials,2014,73:283-288.
[3]SHI J,SUN W,JIANG J,et al.Influence of chloride concentration and pre-passivation on the pitting corrosion resistance of low-alloy reinforcing steel in simulated concrete pore solution[J].Construction&Building Materials,2016,111:805-813.
[4]LIU M,CHENG X,LI X,et al.Corrosion behavior and durability of low-alloy steel rebars in marine environment[J].Journal of Materials Engineering and Performance,2016,25(11):4967-4979.
[5]LIU M,CHENG X Q,LI X G,et al.Indoor accelerated corrosion test and marine filed test of corrosion-resistant low-alloy steel rebars[J].Case Studies in Construction Materials,2016,5:87-99.
[6]贾丙丽,曹发和,刘文娟,等.钢筋混凝土腐蚀的电化学检测研究现状[J].材料科学与工程学报,2010(5):791-796.
[7]宋丹,游凯,程兆俊,等.混凝土结构用钢筋耐蚀性提升研究进展[J].热加工工艺,2016,45(2):9-13.
[8]SINGH J K,SINGH D D N.The nature of rusts and corrosion characteristics of low alloy and plain carbon steels in three kinds of concrete pore solution with salinity and different pH[J].Corrosion Science,2012,56:129-142.
[9]郭湛,完卫国,孙维,等.含稀土高强度耐腐蚀钢筋的研究[J].钢铁,2010,45(12):53-58.
[10]CHEN Y,YANG Z M,WANG H M.Comprehensive Properties of 400MPa Grade Corrosion-Resistant Rebar[J].Journal of Iron and Steel Research International,2012,19(12):48-52.
[11]杨忠民,陈颖,王慧敏.高强耐蚀钢筋[C]//2009全国建筑钢筋生产、设计与应用技术交流研讨会会议文集.北京:中国金属学会,2009.
[12]张建春,左飞龙,蒋金洋,等.耐海水腐蚀钢筋00Cr10MoV的组织结构及性能研究[J].中国腐蚀与防护学报,2016,8(36):363-369.
[13]王丹芊,施锦杰,蒋金洋,等.低合金耐蚀钢筋在两种pH混凝土模拟孔溶液中的耐氯离子点蚀性能[J].东南大学报,2015,6(45):1163-1168.
[14]刘明,程学群,李晓刚,等.Cr合金化对HRB400钢筋腐蚀行为的研究[J].腐蚀科学与防护技术,2015(6):559-564.
[15]施锦杰,孙伟.等效电路拟合钢筋锈蚀行为的电化学阻抗谱研究[J].腐蚀科学与防护技术,2011,23(5):387-392.
[16]QIAO Y X,ZHENG Y G,KE W,et al.Electrochemical behavior of high nitrogen stainless steel in acidic solutions[J].Corrosion Science,2009,51(5):979-986.
[17]LIU M,CHENG X,LI X,et al.Effect of Cr on the passive film formation mechanism of steel rebar in saturated calcium hydroxide solution[J].Applied Surface Science,2016,389:1182-1191.
[18]LIU M,CHENG X,ZHAO G,et al.Corrosion resistances of passive films on low-Cr steel and carbon steel in simulated concrete pore solution[J].Surface and Interface Analysis,2016,48(9):981-989.
[19]林碧兰,徐玉野.基于循环动电位极化法的HRB500钢筋腐蚀行为研究[J].郑州轻工业学院学报(自然科学版),2010,25(4):45-50.
[20]松岛岩,靳裕康.低合金耐蚀钢[M].北京:冶炼工业出版社,2004.
[21]YAMASHITA M,NAGANO H,MISAWA T,et al.Structure of protective rust layers formed on weathering steels by long-term exposure in the industrial atmospheres of Japan and North America[J].ISIJ International,1998,38(3):285-290.