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Corrosion Resistance of CeO2-GO/Epoxy Nanocomposite Coating in Simulated Seawater and Concrete Pore Solutions

Xiaoyan LiuCollege of Mechanics and Materials, Hohai University, Nanjing 210098, ChinaZitao WuCollege of Mechanics and Materials, Hohai University, Nanjing 210098, ChinaYaoyao LyuCollege of Mechanics and Materials, Hohai University, Nanjing 210098, ChinaTianyu LiCollege of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, ChinaHeng YangMaterials & Structural Engineering Department, Nanjing Hydraulic Research Institute, Nanjing 210024, ChinaYanqi LiuCollege of Mechanics and Materials, Hohai University, Nanjing 210098, ChinaRuidan LiuCollege of Mechanics and Materials, Hohai University, Nanjing 210098, ChinaXian XieCollege of Mechanics and Materials, Hohai University, Nanjing 210098, ChinaKai LyuCollege of Civil and Transportation Engineering, Hohai University, Nanjing 210098, ChinaSurendra P. ShahDepartment of Civil Engineering, The University of Texas at Arlington, 701 S. Nedderman Drive, Arlington, TX 76019, USA

2023en

ABI

Annotatsiya

Reinforced concrete structures in the marine environment face serious corrosion risks. Coating protection and adding corrosion inhibitors are the most economical and effective methods. In this study, a nano-composite anti-corrosion filler with a mass ratio of CeO2:GO = 4:1 was prepared by hydrothermally growing cerium oxide on the surface of graphene oxide. The filler was mixed with pure epoxy resin at a mass fraction of 0.5% to prepare a nano-composite epoxy coating. The basic properties of the prepared coating were evaluated from the aspects of surface hardness, adhesion grade, and anti-corrosion performance on Q235 low carbon steel subjected to simulated seawater and simulated concrete pore solutions. Results showed that after 90 days of service, the corrosion current density of the nanocomposite coating mixed with corrosion inhibitor was the lowest (Icorr = 1.001 × 10−9 A/cm2), and the protection efficiency was up to 99.92%. This study provides a theoretical foundation for solving the corrosion problem of Q235 low carbon steel in the marine environment.

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Identifikatorlar

DOI: 10.3390/polym15122602

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