Influence of Electrochemical Anticorrosion Technology on Concrete Structure and Performance

• Published in: Journal of chemistry Vol. 2022; pp. 1 - 7
• Main Author: Yang, Qin
• Format: Journal Article
• Language: English
• Published: New York Hindawi 30.08.2022; John Wiley & Sons, Inc; Hindawi Limited
• Subjects: Analysis; Chloride ions; Civil engineering; Concrete; Concrete structures; Corrosion; Corrosion mechanisms; Corrosion potential; Corrosion prevention; Corrosion rate; Corrosion tests; Desensitization; Electrochemical corrosion; Electrochemical impedance spectroscopy; Electrode polarization; Epoxy resins; Reactance; Reinforced concrete; Reinforcement; Reinforcing steels; Sand; Sea water corrosion; Sea-water; Seawater; Service life; Spectrum analysis; Stainless steel; Steel; Stone; China
• ISSN: 2090-9063; 2090-9071
• DOI: 10.1155/2022/5702379

In order to solve the problem of steel bar desensitization in island concrete, which leads to steel bar corrosion and greatly reduces the service life of structures, this work studies the influence of electrochemical corrosion prevention technology on the structure and performance of concrete. Through linear sweep voltammetry (LSV) and electrochemical impedance spectroscopy (EIS), the reinforcement in seawater sand concrete and ordinary concrete under two different chloride ion erosion modes was tested electrochemically, and then, its polarization curve and electrochemical impedance spectrum were obtained and analyzed. The experimental results show that the slope ratio of anode Tafel decreases significantly under the condition of steel bar passivation. The self-corrosion potential of reinforcement is −204 MV, which is much higher than −480 MV obtained from early testing. The self-corrosion potential obtained from the L3 polarization test tends to be stable after 84 days. As the test continues, the capacitive reactance arc in L1 and L2 medium-frequency region will gradually disappear with the continuous development of corrosion. Conclusion. This study explains the electrochemical mechanism and rate of reinforcement corrosion in seawater and sea sand concrete.