Computational approach to the current and chloride ions distribution of reinforced concrete cathodic protection system

作者：Fuyuan Gong, Yizhan Peng, Zhao Wang, Chikako Fujiyama, Weiliang Jin, Yuxi Zhao, Koichi Maekawa · 发表于：Construction and Building Materials · 年份：2024 · DOI：10.1016/j.conbuildmat.2024.137078 · 被引用次数：19 · 研究领域：Concrete Corrosion and Durability、Smart Materials for Construction、Concrete and Cement Materials Research

A numerical method considering both corrosion kinetics and ion transport is proposed to investigate the distribution of current and chloride ions in a cathodic protection system. The impact of impressed current density, concrete resistivity, chloride ion concentration, rebar arrangement, anode arrangement and thickness of protective layer on the current and ion distribution is discussed. Results show that the rebars located closest to anode exhibit the largest current and lowest chloride ion concentration. The utilization of multiple external anodes proves to be an effective means to enhance the cathodic protection’s effect, but it impairs the ability of removing chloride ions.