[1]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].东南大学学报(自然科学版),2015,45(6):1163-1168.[doi:10.3969/j.issn.1001-0505.2015.06.025]
 Wang Danqian,Shi Jinjie,Jiang Jinyang,et al.Chloride-induced corrosion resistance of low-alloyed reinforcement steels in two different pH simulated concrete solution[J].Journal of Southeast University (Natural Science Edition),2015,45(6):1163-1168.[doi:10.3969/j.issn.1001-0505.2015.06.025]
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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()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
45
期数:
2015年第6期
页码:
1163-1168
栏目:
材料科学与工程
出版日期:
2015-11-20

文章信息/Info

Title:
Chloride-induced corrosion resistance of low-alloyed reinforcement steels in two different pH simulated concrete solution
作者:
王丹芊施锦杰蒋金洋孙伟
东南大学江苏省土木工程材料高技术研究重点实验室, 南京 211189
Author(s):
Wang Danqian Shi Jinjie Jiang Jinyang Sun Wei
Jiangsu Key Laboratory of Construction Materials, Southeast University, Nanjing 211189, China
关键词:
低合金耐蚀钢筋 模拟混凝土孔溶液 电化学抗谱 腐蚀
Keywords:
low-alloyed corrosion-resistant steel simulated concrete pore solution electrochemical impedance spectroscopy corrosion
分类号:
TG528
DOI:
10.3969/j.issn.1001-0505.2015.06.025
摘要:
对比研究了普通低碳钢筋(LC)和2种耐蚀钢筋(1%Cr和6%Cr)在未碳化(pH=12.6)与碳化(pH=10.6)模拟混凝土孔溶液中加入氯离子后的腐蚀行为.采用线性极化电阻(LPR)和电化学阻抗谱(EIS)表征钢筋的电化学行为,并通过扫描电子显微镜(SEM)和X射线能谱仪(EDS)对腐蚀产物进行微观形貌观察和元素分析.结果表明:在点蚀阶段,与LC钢筋相比,1%Cr钢筋的临界氯离子值未提高,而6%Cr钢筋则提高5~10倍;在腐蚀扩展阶段,1%Cr的耐蚀性能与LC钢筋相比有小幅提升,可能的原因是1%Cr钢筋中的Cr促使生成致密锈层.
Abstract:
The chloride-contaminated corrosion behavior of 1%Cr steel, 6%Cr steel and low-carbon steel(LC)exposed in saturated calcium hydroxide solution with pH value of 12.6 and carbonated simulated solution with pH value of 10.6 were studied. Linear polarization resistance(LPR)and electrochemical impedance spectroscopy tests(EIS)were adopted to assess electrochemical behavior of the steels. Scanning electron microscope(SEM)and energy dispersive spectrometer(EDS)were applied to study morphology and composition of corrosion products. The results show that during the pitting period, the chloride threshold value of 1%Cr steel is similar to that of LC steel, however in 6%Cr steel the value improves 5 to 10 times compared to LC and 1%Cr steels. During the corrosion propagation period, the corrosion-resistance of 1%Cr improves slightly compared to that of LC steel. The reason is probably due to the compact rust layer formed on 1%Cr steel.

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相似文献/References:

[1]施锦杰,孙伟.氯离子电迁移下饱和Ca(OH)2中钢筋的锈蚀行为[J].东南大学学报(自然科学版),2010,40(6):1298.[doi:10.3969/j.issn.1001-0505.2010.06.032]
 Shi Jinjie,Sun Wei.Corrosion behavior of steel in saturated Ca(OH)2 solution under chloride ions migration[J].Journal of Southeast University (Natural Science Edition),2010,40(6):1298.[doi:10.3969/j.issn.1001-0505.2010.06.032]

备注/Memo

备注/Memo:
收稿日期: 2015-03-08.
作者简介: 王丹芊(1991—),女,硕士生;孙伟(联系人),女,教授,博士生导师,中国工程院院士,sunwei@seu.edu.cn.
基金项目: 国家自然科学基金资助项目(51278098,51208098)、江苏省重点科技成果转化专项基金资助项目(85120000220).
引用本文: 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].东南大学学报:自然科学版,2015,45(6):1163-1168. [doi:10.3969/j.issn.1001-0505.2015.06.025]
更新日期/Last Update: 2015-11-20