Electrochemical Desalination Reinforced - Mortar System Impact Study

Aimed at the Electrochemical Chloride Extraction (ECE) technique which is becoming widely utilized, electrochemical characteristic of samples ECE-treated was studied on the base of ?5?research by electrochemical methods. Results show that along with corrosion potential becoming positive, RC value of rebar in mortar ECE-treated is also increasing. EIS researches show that the structure of rebar-mortar interface changed after treatment. X-ray photoelectron spectroscopy (XPS) analysis show that it is possible the activated corrosion rebar will repassivate after treatment. The repassivation of the rebar is a process of continuously consummating and agrees well with the positively change of rebar potential and the increase of RC value. The structure and composition of the repassivated film is the same as that of the original one. Scanning Electron Microscopy (SEM) was used to study the composition and morphology of rebar-niortar interface. Results show the composition and morphology of rebar-mortar interface changed after treatment. Comparison of ECE-treated and untreated rebar-mortar interface reveals the significant difference in composition and morphology. Mercury Porosimetry analysis for the samples ECE-treated and untreated were performed, for the ECE-treated samples porosity near rebar increased and that far from rebar decreased, however the porosity of samples ECE-treated was improved generally.