Effect of Pulse Parameters on Deposition in Concrete Crack using Pulse Current Electro-deposition
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2018年第4期
论文作者：储洪强 WANG Tingting JIANG Linhua XU Yi SONG Zijian XU Ning ZHAO Sujing
文章页码：908 - 914
摘 要：To evaluate the effect of pulse parameters on the formation of electrodeposits in concrete cracks, five different types of pulse current were set up, and ZnSO4 and MgSO4 solutions were used as the electrolytes. The rate of weight gain, rate of surface coating, rate of crack closure and crack filling depth were measured. Scanning electron microscopy was used to assess the morphology of the electrodeposits, and energy dispersive spectroscopy was used to analyze the mineral composition of the electrodeposits in the cracks. The experimental results demonstrate that, among five different pulse parameters, when Ton/Toff=0.8 ms/0.8 ms, the healing effect of electro-deposition is the best. The pulse mode hardly affects the mineral composition of the electrodeposits but changes the micromorphology. In addition, for both ZnSO4 and MgSO4 solutions, when Ton/Toff=0.8 ms/0.8 ms, the crystal structure of the electrodeposits is the most uniform and the densest.
储洪强1，WANG Tingting1，JIANG Linhua1，XU Yi1，SONG Zijian1，XU Ning2，ZHAO Sujing1
1. College of Mechanics and Materials, Hohai University2. Nanjing Hydraulic Research Institute
摘 要：To evaluate the effect of pulse parameters on the formation of electrodeposits in concrete cracks, five different types of pulse current were set up, and ZnSO4 and MgSO4 solutions were used as the electrolytes. The rate of weight gain, rate of surface coating, rate of crack closure and crack filling depth were measured. Scanning electron microscopy was used to assess the morphology of the electrodeposits, and energy dispersive spectroscopy was used to analyze the mineral composition of the electrodeposits in the cracks. The experimental results demonstrate that, among five different pulse parameters, when Ton/Toff=0.8 ms/0.8 ms, the healing effect of electro-deposition is the best. The pulse mode hardly affects the mineral composition of the electrodeposits but changes the micromorphology. In addition, for both ZnSO4 and MgSO4 solutions, when Ton/Toff=0.8 ms/0.8 ms, the crystal structure of the electrodeposits is the most uniform and the densest.
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