模拟混凝土孔溶液中钢筋热轧皮的阴极极化还原
|
摘要
采用电化学和表面分析技术对阴极极化条件下模拟混凝土孔溶液中钢筋热轧皮的还原行为进行了研究。用Mott-Schottky曲线分析阴极极化对带轧皮钢筋电荷传输特性的影响,用循环伏安曲线考察带轧皮钢筋在饱和Ca(OH)_2溶液中的电极反应,用SEM和Raman光谱分析阴极极化后热轧皮组成的变化。结果表明:在饱和Ca(OH)_2溶液中,-1. 1 V/SCE(SCE为饱和甘汞电极)恒电位极化7 d后,带轧皮钢筋的施主浓度提高约一个数量级;钢筋热轧皮中能够发生Fe~(2+)■Fe~(3+)+e氧化还原反应;热轧皮表层的α-Fe_2O_3可还原为Fe_3O_4。
The cathodic reduction of mill scale on the rebar in simulated concrete pore solution was investigated by electrochemical and surface analysis methods. The influence of cathodic polarization on the charge transfer behavior of the rebar with mill scale in saturated Ca(OH)_2 solution was detected by Mott-Schottky plots,and the electrode reactions were analyzed by cyclic voltammetry curves. The composition and phase transition in the mill scale caused by cathodic polarization were characterized by SEM and Raman spectra. The results showed that the donor density of the rebar electrode increased by about one order of magnitude after cathodic polarization at -1. 1 V/SCE( saturated calomel electrode) for 7 d in saturated Ca(OH)_2 solution. The Fe~(2+)■Fe~(3+)+e reaction could take place in the mill scale,and the α-Fe_2O_3 in the surface layer could transform to Fe_3O_4 after cathodic polarization under -1. 1 V/SCE.
The cathodic reduction of mill scale on the rebar in simulated concrete pore solution was investigated by electrochemical and surface analysis methods. The influence of cathodic polarization on the charge transfer behavior of the rebar with mill scale in saturated Ca(OH)_2 solution was detected by Mott-Schottky plots,and the electrode reactions were analyzed by cyclic voltammetry curves. The composition and phase transition in the mill scale caused by cathodic polarization were characterized by SEM and Raman spectra. The results showed that the donor density of the rebar electrode increased by about one order of magnitude after cathodic polarization at -1. 1 V/SCE( saturated calomel electrode) for 7 d in saturated Ca(OH)_2 solution. The Fe~(2+)■Fe~(3+)+e reaction could take place in the mill scale,and the α-Fe_2O_3 in the surface layer could transform to Fe_3O_4 after cathodic polarization under -1. 1 V/SCE.
引文
[1] WILSON K,JAWED M,NGALA V. The Selection and Use of Cathodic Protection Systems for the Repair of Reinforced Concrete Structures[J]. Construction and Building Materials,2013,39:19-25.
[2]王淑颖.强制电流阴极保护实时腐蚀防护的研究[D].北京:北京交通大学,2011.
[3]朱鹏.钢筋混凝土结构电化学修复技术研究[D].上海:同济大学,2006.
[4]王羊洋,胡捷,郭文昊,等.混凝土模拟孔溶液中外加电流阴极保护对阳极体系的酸化侵蚀效应[J].材料研究学报,2016(12):931-939.
[5]王昆,屈文俊,李沛豪,等.再碱化后的钢筋混凝土长期电化学研究[J].同济大学学报(自然科学版),2012(3):353-360.
[6]曹楚南.腐蚀电化学原理[J].腐蚀科学与防护技术,2008(3):165.
[7]张俊喜,张羽,夏凯,等.带锈钢筋再碱化过程中的电极过程研究[J].腐蚀科学与防护技术,2009(3):263-265.
[8]屈文俊,古剑,张弛.再碱化后不同锈蚀程度钢筋的电极化研究[J].结构工程师,2012(4):109-114.
[9]王戈,陈俊明.铁锈的阴极行为及其对腐蚀与防护的影响[J].中国腐蚀与防护学报,1985(4):258-263.
[10]鲁进亮,张俊喜,张羿,等.钢筋表面氧化层的阴极极化还原过程分析[J].建筑材料学报,2013(5):770-776.
[11]童芸芸,叶良,马超.基于拉曼光谱实时检测的碳化钢筋混凝土再碱化机理探究[J].建筑材料学报,2017(6):894-901.
[12]童芸芸,叶良,马超.钢筋腐蚀产物实时检测的再钝化机理分析[J].深圳大学学报(理工版),2017(1):75-81.
[13] IVANOVA Y A, MONTEIRO J F, TEIXEIRA L B, et al.Designed Porous Microstructures for Electrochemical Reduction of Bulk Hematite Ceramics[J]. Materials&Design,2017,122:307-314.
[14] MONTEIRO J F,IVANOVA Y A,KOVALEVSKY A V,et al.Reduction of Magnetite to Metallic Iron in Strong Alkaline Medium[J]. Electrochimica Acta,2016,193:284-292.
[15] ALLANORE A, LAVELAINE H, VALENTIN G, et al.Observation and Modeling of the Reduction of Hematite Particles to Metal in Alkaline Solution by Electrolysis[J]. Electrochimica Acta,2010,55(12):4007-4013.
[16]何爱花.热轧钢板氧化膜对基体碳钢腐蚀电化学行为的影响[D].青岛:中国海洋大学,2007.
[17]李源晋.带轧皮钢筋在模拟混凝土孔溶液中的化学稳定性研究[D].北京:清华大学,2016.
[18] GHODS P. Multi-Scale Investigation of the Formation and Breakdown of Passive Films on Carbon Steel Rebar in Concrete[D]. Ottawa:Carleton University,2010.
[19] POURSAEE A,HANSSON C M. Reinforcing Steel Passivation in Mortar and Pore Solution[J]. Cement and Concrete Research,2007,37(7):1127-1133.
[20] WANG L,DAUB K,QIN Z,et al. Effect of Dissolved Ferrous Iron on Oxide Film Formation on Carbon Steel[J]. Electrochimica Acta,2012,76:208-217.
[21] WIELANT J,GOOSSENS V,HAUSBRAND R,et al. Electronic Properties of Thermally Formed Thin Iron Oxide Films[J].Electrochimica Acta,2007,52(27):7617-7625.
[22] HAMADOU L,KADRI A,BENBRAHIM N. Characterisation of Passive Films Formed on Low Carbon Steel in Borate Buffer Solution(pH 9. 2)by Electrochemical Impedance Spectroscopy[J]. Applied Surface Science,2005,252(5):1510-1519.
[23] ZHANG Y, LI Q. Electrochemical Study on Semiconductive Properties of the Passive Film on Rebar in Concrete[J]. Journal of Zhejiang University(Science),2006,7(8):1447-1452.
[24] HAKIKI N E, MONTEMOR M F, FERREIRA M, et al.Semiconducting Properties of Thermally Grown Oxide Films on AISI304 Stainless Steel[J]. Corrosion Science,2000,42(4):687-702.
[25] HAKIKI N E. Comparative Study of Structural and Semiconducting Properties of Passive Films and Thermally Grown Oxides on AISI 304Stainless Steel[J]. Corrosion Science,2011,53(9):2688-2699.
[26] MUNDRA S,CRIADO M,BERNAL S A,et al. ChlorideInduced Corrosion of Steel Rebars in Simulated Pore Solutions of Alkali-Activated Concretes[J]. Cement and Concrete Research,2017,100:385-397.
[27] SONG I,GERVASIO D,PAYER J H. Electrochemical Behaviour of Iron and Iron Oxide Thin Films in Alkaline(1 m KOH)Aqueous Solution:A Voltammetry Study for Cathodic Instability of Coating/Metal Interface[J]. Journal of Applied Electrochemistry,1996,26(10):1045-1052.
[28]蒋俊,张俊喜,鲁进亮,等.钢筋在再碱化过程中的电化学行为研究[J].化学学报,2011(20):2347-2352.
[29]鲁进亮,张俊喜,张羿,等.钢筋表面氧化层的阴极极化还原过程分析[J].建筑材料学报,2013(5):770-776.
[30] FOULKES F R,MCGRATH P. A Rapid Cyclic Voltammetric Method for Studying Cement Factors Affecting the Corrosion of Reinforced Concrete[J]. Cement and Concrete Research,1999,29(6):873-883.
[2]王淑颖.强制电流阴极保护实时腐蚀防护的研究[D].北京:北京交通大学,2011.
[3]朱鹏.钢筋混凝土结构电化学修复技术研究[D].上海:同济大学,2006.
[4]王羊洋,胡捷,郭文昊,等.混凝土模拟孔溶液中外加电流阴极保护对阳极体系的酸化侵蚀效应[J].材料研究学报,2016(12):931-939.
[5]王昆,屈文俊,李沛豪,等.再碱化后的钢筋混凝土长期电化学研究[J].同济大学学报(自然科学版),2012(3):353-360.
[6]曹楚南.腐蚀电化学原理[J].腐蚀科学与防护技术,2008(3):165.
[7]张俊喜,张羽,夏凯,等.带锈钢筋再碱化过程中的电极过程研究[J].腐蚀科学与防护技术,2009(3):263-265.
[8]屈文俊,古剑,张弛.再碱化后不同锈蚀程度钢筋的电极化研究[J].结构工程师,2012(4):109-114.
[9]王戈,陈俊明.铁锈的阴极行为及其对腐蚀与防护的影响[J].中国腐蚀与防护学报,1985(4):258-263.
[10]鲁进亮,张俊喜,张羿,等.钢筋表面氧化层的阴极极化还原过程分析[J].建筑材料学报,2013(5):770-776.
[11]童芸芸,叶良,马超.基于拉曼光谱实时检测的碳化钢筋混凝土再碱化机理探究[J].建筑材料学报,2017(6):894-901.
[12]童芸芸,叶良,马超.钢筋腐蚀产物实时检测的再钝化机理分析[J].深圳大学学报(理工版),2017(1):75-81.
[13] IVANOVA Y A, MONTEIRO J F, TEIXEIRA L B, et al.Designed Porous Microstructures for Electrochemical Reduction of Bulk Hematite Ceramics[J]. Materials&Design,2017,122:307-314.
[14] MONTEIRO J F,IVANOVA Y A,KOVALEVSKY A V,et al.Reduction of Magnetite to Metallic Iron in Strong Alkaline Medium[J]. Electrochimica Acta,2016,193:284-292.
[15] ALLANORE A, LAVELAINE H, VALENTIN G, et al.Observation and Modeling of the Reduction of Hematite Particles to Metal in Alkaline Solution by Electrolysis[J]. Electrochimica Acta,2010,55(12):4007-4013.
[16]何爱花.热轧钢板氧化膜对基体碳钢腐蚀电化学行为的影响[D].青岛:中国海洋大学,2007.
[17]李源晋.带轧皮钢筋在模拟混凝土孔溶液中的化学稳定性研究[D].北京:清华大学,2016.
[18] GHODS P. Multi-Scale Investigation of the Formation and Breakdown of Passive Films on Carbon Steel Rebar in Concrete[D]. Ottawa:Carleton University,2010.
[19] POURSAEE A,HANSSON C M. Reinforcing Steel Passivation in Mortar and Pore Solution[J]. Cement and Concrete Research,2007,37(7):1127-1133.
[20] WANG L,DAUB K,QIN Z,et al. Effect of Dissolved Ferrous Iron on Oxide Film Formation on Carbon Steel[J]. Electrochimica Acta,2012,76:208-217.
[21] WIELANT J,GOOSSENS V,HAUSBRAND R,et al. Electronic Properties of Thermally Formed Thin Iron Oxide Films[J].Electrochimica Acta,2007,52(27):7617-7625.
[22] HAMADOU L,KADRI A,BENBRAHIM N. Characterisation of Passive Films Formed on Low Carbon Steel in Borate Buffer Solution(pH 9. 2)by Electrochemical Impedance Spectroscopy[J]. Applied Surface Science,2005,252(5):1510-1519.
[23] ZHANG Y, LI Q. Electrochemical Study on Semiconductive Properties of the Passive Film on Rebar in Concrete[J]. Journal of Zhejiang University(Science),2006,7(8):1447-1452.
[24] HAKIKI N E, MONTEMOR M F, FERREIRA M, et al.Semiconducting Properties of Thermally Grown Oxide Films on AISI304 Stainless Steel[J]. Corrosion Science,2000,42(4):687-702.
[25] HAKIKI N E. Comparative Study of Structural and Semiconducting Properties of Passive Films and Thermally Grown Oxides on AISI 304Stainless Steel[J]. Corrosion Science,2011,53(9):2688-2699.
[26] MUNDRA S,CRIADO M,BERNAL S A,et al. ChlorideInduced Corrosion of Steel Rebars in Simulated Pore Solutions of Alkali-Activated Concretes[J]. Cement and Concrete Research,2017,100:385-397.
[27] SONG I,GERVASIO D,PAYER J H. Electrochemical Behaviour of Iron and Iron Oxide Thin Films in Alkaline(1 m KOH)Aqueous Solution:A Voltammetry Study for Cathodic Instability of Coating/Metal Interface[J]. Journal of Applied Electrochemistry,1996,26(10):1045-1052.
[28]蒋俊,张俊喜,鲁进亮,等.钢筋在再碱化过程中的电化学行为研究[J].化学学报,2011(20):2347-2352.
[29]鲁进亮,张俊喜,张羿,等.钢筋表面氧化层的阴极极化还原过程分析[J].建筑材料学报,2013(5):770-776.
[30] FOULKES F R,MCGRATH P. A Rapid Cyclic Voltammetric Method for Studying Cement Factors Affecting the Corrosion of Reinforced Concrete[J]. Cement and Concrete Research,1999,29(6):873-883.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |