tailieunhanh - Evaluation of the anticorrosion of waterborne epoxy coatings containing cerium salt activated ceria nanoparticles deposited onto carbon steel substrate

The electrochemical impedance spectroscopy (EIS) was carried out to evaluate the role of the activated-CeO2 nanoparticles in the organic coatings immersed in a M NaCl solution. Thus, the effect of the cerium ion activated ceria nanoparticles on the coatings presented the artificial defect in an aggressive environment was examined via salt spray test. | Vietnam Journal of Science and Technology 56 (3B) (2018) 96-103 EVALUATION OF THE ANTICORROSION OF WATERBORNE EPOXY COATINGS CONTAINING CERIUM SALT-ACTIVATED CERIA NANOPARTICLES DEPOSITED ONTO CARBON STEEL SUBSTRATE Anh Son Nguyen*, Thuy Duong Nguyen, Thu Thuy Thai Institute for Tropical Technology, Vietnam Academy of Science and Technology, A13 Building, 18 Hoang Quoc Viet, Cau Giay District, Ha Noi * Email: nason@ Received: 14 July 2018; Accepted for publication: 9 September 2018 ABSTRACT The present work investigates the corrosion protection of waterborne epoxy coatings loading CeO2 nanoparticles activated with cerium salt for the carbon steel substrates. First, the dispersion of activated nanoparticles in the epoxy matrix was observed by field emission scanning electron microscopy (FESEM). The electrochemical impedance spectroscopy (EIS) was carried out to evaluate the role of the activated-CeO2 nanoparticles in the organic coatings immersed in a M NaCl solution. Thus, the effect of the cerium ion activated ceria nanoparticles on the coatings presented the artificial defect in an aggressive environment was examined via salt spray test. Complementary studies were performed using cross-cut and pulloff test to assess the adherence properties of the samples. Results revealed that the presence of activated-CeO2 nanoparticles enhanced corrosion protection properties of waterborne epoxy coating without losing adherence properties. Keywords: ceria nanoparticles, cerium salt-activated, waterborne epoxy coatings, anticorrosion. 1. INTRODUCTION Corrosion is the common problem in aeronautic, automobile industry that contributes to the degradation of materials. Many technologies were applied to delay this phenomenon such as using well-designed alloys [1, 2] or protective coatings [3-5]. The use of organic coatings is more popular because they provide a good protection against corrosion for different types of materials and a cost-effective method. Due to a