超声电化学机制对砂浆中氯离子萃取效率的影响

Influence of Sonoelectrochemical Mechanism on Efficiency of Electrochemical Chloride Extraction from Mortar

为了研究间断通电、超声对钢筋混凝土中氯离子萃取效率的影响,采用不同超声电化学萃取机制对砂浆样品进行处理,并利用电化学方法对萃取后的钢筋腐蚀情况进行表征。结果表明:间隔通电超声电化学萃取的样品耗能最低,水灰比为0.35和0.50的砂浆样品的萃取效率分别可以达到43.23%和44.45%,是一种有效可行的萃取机制;电化学萃取前期进行超声辅助的两种样品的氯离子萃取效率分别为48.72%和50.79%,高于萃取后期进行超声辅助的样品。

Extraction efficiencies of mortar samples treated by different sonoelectrochemical methods were detected to decide the effects of intermittent electricity and ultrasound, and so were their corrosion behaviors before and after electrochemical chloride extraction （ECE）. Sample with water-cement rations as 0.35 and 0.50 treated by commutative electrified and ultrasonic are not only more energy conservation, but also can achieve high efficiencies of 43.23% and 44.45% respectively, which means this method is feasible and efficient. Using ultrasound in the earlier stage, efficiencies of different water-cement ratios are 48. 72% and 50.79% in ECE,respectively,which is more effective than that in the later stage.