A Method for Evaluating Corrosion of Contaminated Soil-Electrochemical Impedance Spectroscopy(EIS)Method
In this study,the equations for electrochemical impedance characteristics,including Nyquist diagrams and Bode chart,of contaminated soils was obtained by using soil mechanics,chemical,electrochemical and microscopic analysis.The analysis is implemented in light of the relationship between mineral composition,microstructure,macro-performance and electrochemical characteristics of contaminated soil.The parameters for physical,mechanical and electrochemical properties were then obtained based on the EIS characteristic.By theoretical EIS analysis,the relationship between electrochemical properties(electrolyte resistance,charge transfer resistance,electric double layer capacitor and diffusion resistance coefficient)and soil properties(the mineral compositions,moisture,soil microstructure,pore distribution and soil strength)was determined.As a result,the equivalent circuit model and corrosion evaluation system for the contaminated soil were established,which can evaluate the soil contaminations and provide advices on electric double layer,electrode material,solid electrolyte and corrosion protections of metallic materials embedded in the soils.It also provides important engineering data and scientific basis for evaluation of ecological suitability,which has significant economic and social benefits.
Electrochemical impedance spectroscopy (EIS) method Contaminated soil Electrochemical system Equivalent circuit model Corrosion evaluation system
Bin He Yong Wang Ruizhen Xie Pengju Han Xiaohong Bai
College of Architecture and Civil Engineering,Taiyuan University of Technology,Taiyuan 030024,China; State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechani College of Architecture and Civil Engineering,Taiyuan University of Technology,Taiyuan 030024,China
国际会议
The 8th International Congress on Environmental Geotechnics(第八届国际环境土工大会)
杭州
英文
716-723
2018-10-28（万方平台首次上网日期，不代表论文的发表时间）