Influence of sulfate ion and associated cation type on steel reinforcement corrosion in concrete powder aqueous solution in the presence of chloride ions
Influence of sulfate ion and associated cation type on steel reinforcement corrosion in concrete powder aqueous solution in the presence of chloride ions
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DOI：
10.1016/j.cemconres.2016.10.008
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发表时间：
2017-01-01
影响因子：
11.4
通讯作者：
Pradhan, Bulu
中科院分区：
文献类型：
--
作者：
Shaheen, Fouzia;Pradhan, Bulu
通过动电位极化试验，确定了受氯离子和硫酸盐离子污染的混凝土粉末水溶液中钢筋的腐蚀状态。并对其进行了X射线衍射分析和红外光谱分析。从结果可以看出，不同的腐蚀区域在电位范围上是一致的。Na2SO4的存在缓解了氯离子的影响，而MgSO4的存在则刺激了氯离子的作用，降低了钢筋在氯离子环境中的钝化程度。普通硅酸盐水泥抗镁硫酸盐侵蚀性能较好，而硅酸盐火山灰水泥在氯离子存在下抗钠硫酸盐侵蚀性能较好。(C)2016爱思唯尔有限公司。保留所有权利。
State of rebar corrosion in concrete powder aqueous solution contaminated with chloride and sulfate ions has been determined by conducting a potentiodynamic polarization test. XRD analysis and FTIR spectroscopy were also performed. From the results, different zones of corrosion in terms of potential ranges have been identified. The presence of Na2SO4 has mitigated the effect of chloride ions whereas the presence of MgSO4 has stimulated the effect of chloride ions on reducing the passivity of steel reinforcement in a chloride environment. Ordinary Portland cement performed better against Mg-oriented sulfate attack whereas Portland pozzolana cement performed better against Na-oriented sulfate attack in the presence of chloride ions. (C) 2016 Elsevier Ltd. All rights reserved.