Influence of CaCl2 and NaCl from different sources on chloride threshold value for the corrosion of steel reinforcement in concrete
Influence of CaCl2 and NaCl from different sources on chloride threshold value for the corrosion of steel reinforcement in concrete
复制标题
不同来源的CaCl2和NaCl对混凝土中钢筋腐蚀氯化物阈值的影响
DOI：
10.1016/j.conbuildmat.2010.07.023
复制
发表时间：
2011-02-01
影响因子：
7.4
通讯作者：
Jiang, Yu
中科院分区：
文献类型：
--
作者：
Xu, Jinxia;Jiang, Linhua;Jiang, Yu
研究了内源和外源CaCl2和氯化钠对混凝土中钢筋锈蚀氯离子阈值的影响。用半电池电位法和线性极化法检测了钢筋的活性腐蚀开始。测定了游离氯化物、[Cl-]/[OH-]、总氯化物和[Cl-]/[H+]等不同指标的阈值。研究发现，含不同来源的CaCl2和NaCl2的试件的氯离子腐蚀阈值与这些指标有关。特别是，临界[Cl-]/[H+]，即酸溶氯化物与酸中和能力的比率，无论类型和不同来源的氯盐，都大致保持在0.02不变。(C)2010爱思唯尔有限公司。保留所有权利。
The influence of CaCl2 and NaCl from internal and external sources on the chloride threshold value for the corrosion of steel reinforcement in concrete has been investigated. The onset of active corrosion for the steel reinforcement has been detected by half-cell potential and linear polarization methods. Also, the threshold value with different indices, such as free chlorides, [Cl-]/[OH-], total chlorides and [Cl-]/[H+] has been measured. It has been found that the chloride threshold values for the corrosion of the specimens with CaCl2 and NaCl from different sources depend on the indices. Especially, the critical [Cl-]/[H+], i.e. the ratio of acid soluble chlorides to acid neutralisation capacity irrespective of the type and different sources of chloride salt approximately keeps constant at 0.02. (C) 2010 Elsevier Ltd. All rights reserved.