阴极保护对混凝土模拟液中钢筋电化学行为影响
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- 英文论文题名：Effect of Cathodic Protection on the Electrochemical Behavior of Reinforcing Steel in Simulated Concrete Pore Solution
- 论文作者：左俊卿 ; 姚武 ; 周虹 ; 吴德龙
- 英文论文作者：ZUO Junqing ; YAO Wu ; ZHOU Hong ; WU Delong ; Shanghai Construction Group Co. ; Ltd. ; Shanghai Engineering Research Center of Mega Structure High Performance Concrete ; Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education ; Tongji University
- 年：2016
- 作者机构：上海建工集团股份有限公司;上海高大结构高性能混凝土工程技术研究中心;同济大学先进土木工程材料教育部重点实验室;
- 论文关键词：阴极保护 ; 混凝土模拟液 ; 钢筋 ; 电化学行为
- 英文论文关键词：cathodic protection ; simulated concrete pore solution ; reinforcing steel ; electrochemical behavior
- 会议召开时间：2016-11-18
- 会议录名称：第一届先进材料前沿学术会议论文集（《材料导报》2016年第30卷第Z1期）
- 语种：中文
- 分类号：TU528.571
- 学会代码：CLDB
- 会议名称：第一届先进材料前沿学术会议
- 会议地点：中国陕西西安
- 主办单位：《材料导报》杂志社
- 学会名称：材料导报编辑部
- 页数：4
- 文件大小：763k
- 原文格式：O
- 会议级别：全国
摘要
采用腐蚀电位、腐蚀电流和电化学交流阻抗谱,研究了阴极保护对不同腐蚀程度情况下的混凝土模拟液中钢筋电化学行为的影响。结果表明:实施阴极保护后,各组钢筋试样4 h去极化电位衰减值均大于100 mV,腐蚀电流均降低,说明钢筋被修复到钝化状态。腐蚀介质相同的情况下,实施阴极保护的试样容抗弧半径大于未实施阴极保护试样。相同阴极保护情况下,腐蚀介质中氯离子浓度越大,钢筋电极电荷转移电阻越小。采取阴极保护措施的钢筋试样电荷转移电阻随龄期延长而增大,说明外加电流对钢筋提供了有效的保护。
Corrosion potential,corrosion current and electrochemical AC impedance spectroscopy were adopted to study the effect on the electrochemical behavior of cathodic protection to reinforcing steel in simulated concrete pore solution subjected to different degree of corrosion.Test results show that the four-hour decays of reinforcing steel potential of each specimen are higher than100 mV and the corrosion current is decreased.Cathodic protection makes the reinforcing steel from active to passive.In the same corrosion environment,the capacitive loop diameter of specimen under cathodic protection is greater than that of specimen without cathodic protection.Under the same cathodic protection condition,the higher the chloride addition of corrosive medium is,the smaller the capacitive loop diameter of reinforcing steel is.The charge transfer resistance of specimen under cathodic protection increases along with age.Cathodic protection provides effective protection to reinforcing steel in simulated concrete pore solution.
Corrosion potential,corrosion current and electrochemical AC impedance spectroscopy were adopted to study the effect on the electrochemical behavior of cathodic protection to reinforcing steel in simulated concrete pore solution subjected to different degree of corrosion.Test results show that the four-hour decays of reinforcing steel potential of each specimen are higher than100 mV and the corrosion current is decreased.Cathodic protection makes the reinforcing steel from active to passive.In the same corrosion environment,the capacitive loop diameter of specimen under cathodic protection is greater than that of specimen without cathodic protection.Under the same cathodic protection condition,the higher the chloride addition of corrosive medium is,the smaller the capacitive loop diameter of reinforcing steel is.The charge transfer resistance of specimen under cathodic protection increases along with age.Cathodic protection provides effective protection to reinforcing steel in simulated concrete pore solution.
引文
1 Monticelli C,Natali M,Balbo A,et al.A study on the corrosion of reinforcing bars in alkali-activated fly ash mortars under wet and dry exposures to chloride solutions[J].Cem Concr Res,2016,87:53.
2 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].Constr Build Mater,2016,111:805.
3曹楚南.腐蚀电化学原理[M].北京:化学工业出版社,2008:90.
4 Carmona J,Climent M,Garces P.Influence of different ways of chloride contamination on the efficiency of cathodic protection applied on structural reinforced concrete elements[J].J Electroanal Chem,2016(In press)(doi:10.1016/j.jelechem 2016.08.029).
5 Yao W,Xia Q,Zuo J.Cathodic protection of reinforcing steel in simulated concrete pore solution based on thermoelectric generation[J].J Build Mater,2015,18(1):75(in Chinese).姚武,夏强,左俊卿.基于温差发电的混凝土模拟液中钢筋阴极保护[J].建筑材料学报,2015,18(1):75.
6 Sun H,Wei L,Zhu M,et al.Corrosion behavior of carbon fiber reinforced polymer anode in simulated impressed current cathodic protection system with 3%NaCl solution[J].Constr Build Mater,2016,112:538.
7 ASTM C 876-09 Standard test method for half-cell potentials of uncoated reinforcing steel in concrete[S].
8 NACE.NACE standard RP0169-96 control of external corrosion on underground or submerged metallic piping systems[S].
9 GEL/603.BS 7361-1:1991 Cathodic protection.Code of practice for land and marine applications[S].
10 Ba H,Zhao W.Study on chloride threshold level of reinforcing steel corrosion in simulated concrete pore solution by testing Rp[J].Concrete,2010(12):Kin Chinese).巴恒静,赵炜璇.利用极化电阻测试混凝土模拟孔隙溶液中钢筋锈蚀临界氯离子浓度[J].混凝土,2010(12):1.
11 Ai Z,Sun W,Jiang J,et al.Passive behavior of new alloy corrosion resistant steel CrlOMol in chloride-containing environment[J].Mater Rev:Rev,2016,30(8):92(in Chinese).艾志勇,孙伟,蒋金洋,等.氯盐环境中新型合金耐蚀钢筋Cr10Mol的钝化行为[J].材料导报:综述篇,2016,30(8):92.
12 Andrade C,Alonso C.RILEM TC 154-EMC:'Electrochemical techniques for measuring metallic corrosion'recommendations-test methods for on-site corrosion rate measurement of steel reinforcement in concrete by means of the polarization resistance method[J].Mater Struct,2004,37(9):623.
13 Zuo J,Yao W,Xu J,et al.Effects of carbon nanotube-carbon fiber cementitious conductive anode for cathodic protection of reinforced concrete[J].J Testing Evaluation,2017(in press)(doi:10.1520/JTE20160062).
14 Zuo J,Yao W.Effect of CNT-CF cement-based materials auxiliary anode on cathodic protection of reinforced concrete[J].J Build Mater,2016,19(3):424(in Chinese).左俊卿,姚武.CNT CF水泥基材料阳极对钢筋混凝土阴极保护影响[J].建筑材料学报,2016,19(3):424.
15 Carmona J,Garces P,Climent M Efficiency of a conductive cementbased anodic system for the application of cathodic protection,cathodic prevention and electrochemical chloride extraction to control corrosion in reinforced concrete structures[J].Corros Sci,2015,96:102.
2 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].Constr Build Mater,2016,111:805.
3曹楚南.腐蚀电化学原理[M].北京:化学工业出版社,2008:90.
4 Carmona J,Climent M,Garces P.Influence of different ways of chloride contamination on the efficiency of cathodic protection applied on structural reinforced concrete elements[J].J Electroanal Chem,2016(In press)(doi:10.1016/j.jelechem 2016.08.029).
5 Yao W,Xia Q,Zuo J.Cathodic protection of reinforcing steel in simulated concrete pore solution based on thermoelectric generation[J].J Build Mater,2015,18(1):75(in Chinese).姚武,夏强,左俊卿.基于温差发电的混凝土模拟液中钢筋阴极保护[J].建筑材料学报,2015,18(1):75.
6 Sun H,Wei L,Zhu M,et al.Corrosion behavior of carbon fiber reinforced polymer anode in simulated impressed current cathodic protection system with 3%NaCl solution[J].Constr Build Mater,2016,112:538.
7 ASTM C 876-09 Standard test method for half-cell potentials of uncoated reinforcing steel in concrete[S].
8 NACE.NACE standard RP0169-96 control of external corrosion on underground or submerged metallic piping systems[S].
9 GEL/603.BS 7361-1:1991 Cathodic protection.Code of practice for land and marine applications[S].
10 Ba H,Zhao W.Study on chloride threshold level of reinforcing steel corrosion in simulated concrete pore solution by testing Rp[J].Concrete,2010(12):Kin Chinese).巴恒静,赵炜璇.利用极化电阻测试混凝土模拟孔隙溶液中钢筋锈蚀临界氯离子浓度[J].混凝土,2010(12):1.
11 Ai Z,Sun W,Jiang J,et al.Passive behavior of new alloy corrosion resistant steel CrlOMol in chloride-containing environment[J].Mater Rev:Rev,2016,30(8):92(in Chinese).艾志勇,孙伟,蒋金洋,等.氯盐环境中新型合金耐蚀钢筋Cr10Mol的钝化行为[J].材料导报:综述篇,2016,30(8):92.
12 Andrade C,Alonso C.RILEM TC 154-EMC:'Electrochemical techniques for measuring metallic corrosion'recommendations-test methods for on-site corrosion rate measurement of steel reinforcement in concrete by means of the polarization resistance method[J].Mater Struct,2004,37(9):623.
13 Zuo J,Yao W,Xu J,et al.Effects of carbon nanotube-carbon fiber cementitious conductive anode for cathodic protection of reinforced concrete[J].J Testing Evaluation,2017(in press)(doi:10.1520/JTE20160062).
14 Zuo J,Yao W.Effect of CNT-CF cement-based materials auxiliary anode on cathodic protection of reinforced concrete[J].J Build Mater,2016,19(3):424(in Chinese).左俊卿,姚武.CNT CF水泥基材料阳极对钢筋混凝土阴极保护影响[J].建筑材料学报,2016,19(3):424.
15 Carmona J,Garces P,Climent M Efficiency of a conductive cementbased anodic system for the application of cathodic protection,cathodic prevention and electrochemical chloride extraction to control corrosion in reinforced concrete structures[J].Corros Sci,2015,96:102.
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