Effect of GO‐TiO2 to waterborne epoxy resin on microstructure and anti‐corrosion properties

• Published in: Journal of applied polymer science Vol. 140; no. 40; pp. 1 - 11
• Main Authors: Wan, Tao, Wang, Bo, Wei, Shicheng, Yu, Kailun, Wang, Yujiang, Liang, Yi, Huang, Wei, Chen, Hao, Jiao, Zhongyuan
• Format: Journal Article
• Language: English
• Published: Hoboken Wiley Subscription Services, Inc 20.10.2023
• Subjects: Corrosion mechanisms; Corrosion prevention; Corrosion resistance; Epoxy resins; Materials science; Mechanical properties; Open circuit voltage; Polymers; Protective coatings; Salt spray tests; Thermal resistance; Thermal stability; Titanium dioxide; Ultrasonic testing; Water absorption; Weight loss; Weight reduction
• ISSN: 0021-8995; 1097-4628
• DOI: 10.1002/app.54494

To enhance the anti‐corrosion of the waterborne epoxy resin coating, we filled GO‐TiO2 into the coating with ultrasound and stirring method. Results show that coatings rendered optimum properties at GO‐TiO2 content of 0.4 wt% with a hardness of 3H and rate of thermal weight loss reduce 8.3 wt%. After immersion for 30 days, coating exhibited water absorption ratio of merely 11.25% and open circuit potential of −0.871 V. After 1000 h of scratch‐neutral salt spray test, no obvious signs of corrosion were observed on surface. Moreover, Electrochemical results demonstrated that maximum impedance modulus of 0.4GO‐TiO2 coating was 2.18 × 106 Ω cm2, corresponding to superior corrosion resistance. What is more, anticorrosion mechanism was discussed. In conclusion, Filling GO‐TiO2 improved mechanical properties, thermal stability and corrosion resistance of waterborne epoxy resin coatings.