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Influence of SiO2 Particles on Electrochemical Characteristics of Carbon Steel |
Aijiao LI,Yanhua WANG( ),Lian ZHONG,Jia WANG,Lin FENG,Peipei YANG |
Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China |
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Cite this article:
Aijiao LI,Yanhua WANG,Lian ZHONG,Jia WANG,Lin FENG,Peipei YANG. Influence of SiO2 Particles on Electrochemical Characteristics of Carbon Steel. Chinese Journal of Materials Research, 2017, 31(6): 422-428.
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Abstract The influence of inert solid particles SiO2 on electrochemical characteristics of carbon steel was studied by using the array electrode technique and the electrochemical impedance spectroscopy. It was found that the spreadability of droplets increased with the increase of the amount of SiO2,as well as the corrosion activity area.In addition, the impedance spectra showed two capacitive loops with the deposition of SiO2 particles, and the capacitive loop in the high frequencies was attributed to the blocking effect of the SiO2 particles. The corrosion behavior of carbon steel was affected by these two aspects, the spreadability of droplets and the blocking effect of the SiO2 particles. With the increase of the amount of SiO2, the average current value decreased firstly and then increased. There was a critical value in the deposition amount of SiO2 particles. When the amount was lower than the critical value, it could hinder corrosion. While, when the amount was higher than the critical value, it would accelerate corrosion owing to the expansion of droplets.
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Received: 17 March 2016
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Fund: Supported by National Natural Science Foundation of China (No.51131005) and Promotive Research Fund Forexcellent Young and Middle-aged Scientists of Shandong Province (No.BS2012HZ021) |
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