Anti-microbial corrosion performance of concrete treated by Cu2O electrodeposition: Influence of different treatment parameters

Published on Oct 1, 2021in Cement & Concrete Composites6.257
· DOI :10.1016/J.CEMCONCOMP.2021.104195
Zhengyu Zhu1
Estimated H-index: 1
(Hohai University),
Hongqiang Chu13
Estimated H-index: 13
(Hohai University)
+ 3 AuthorsLinhua Jiang24
Estimated H-index: 24
(Hohai University)
Abstract null null Electrodeposition of Cu2O on the concrete surface was applied to protect the concrete sewers from microbially induced corrosion. The effects of deposition time, current density, and electrolyte type and concentration on the antimicrobial properties of the Cu2O-electrodeposited mortar specimen were investigated. X-ray diffraction analysis and scanning electron microscopy-energy dispersive X-ray spectrometry were performed to analyse the morphology and chemical composition of the deposits. The results indicated that the main compositions of the deposits were Cu2O and Cu, and the copper content of the deposits increased with increasing the deposition time and current density. However, a high current density (over 1.5 mA/cm2) caused an increase in the permeability of mortar specimens due to the thermal expansion of steels inside. The deposits were found to inhibit the growth of both sulphate-reducing bacteria and sulphate-oxidizing bacteria. Taking into consideration the copper content, bactericidal property, permeability and adhesion between the deposits and the substrate, optimum parameters of electrodeposition were determined. This preliminary study provides a basis for further investigating the antimicrobial performance of the electrodeposited concrete sewers in a real sewer environment.
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