Corrosion Resistance of Graphene-Reinforced Waterborne Epoxy Coatings

• Published in: Journal of materials science & technology Vol. 32; no. 5; pp. 425 - 431
• Main Authors: Liu, Shuan, Gu, Lin, Zhao, Haichao, Chen, Jianmin, Yu, Haibin
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.05.2016
• Subjects: Coatings; Composite coatings; Corrosion inhibitors; Corrosion prevention; Corrosion resistance; Electrochemical impedance spectroscopy; Electrochemical impedance spectroscopy (EIS); Graphene; Protective coatings; Waterborne epoxy coating; 均匀分散; 复合涂层; 水性环氧涂料; 环氧涂层; 电化学阻抗谱; 石墨; 耐腐蚀性能; 防腐性能; Corrosion resistance; Electrochemical impedance spectroscopy (EIS); Graphene; Waterborne epoxy coating
• ISSN: 1005-0302; 1941-1162
• DOI: 10.1016/j.jmst.2015.12.017

Graphene （G） was dispersed uniformly in water and used as an inhibitor in waterborne epoxy coatings. The effect of dispersed G on anticorrosion performance of epoxy coatings was evaluated. The composite coatings displayed outstanding barrier properties against H20 molecule compared to the neat epoxy coating. Open circuit potential （OCP）, Tafel and electrochemical impedance spectroscopy （EIS） analysis confirmed that the corrosion rate exhibited by composite coatings with 0.5 wt% G was an order of magnitude lower than that of neat epoxy coating. Salt spray test results revealed superior corrosion resistance offered by the composite coating.