Study on Seawater Corrosion Resistance of Epoxy Resin-Geopolymer Composites Coating
ZEZE Armande Loraine Phalé1, XU Hongyan1, ZHANG Mo1,2, MA Guowei1,3
1 School of Civil and Transportation Engineering, Hebei University of Technology, Tianjin 300401, China 2 Smart Infrastructure Research Institute, Tianjin 300401, China 3 Tianjin Key Laboratory of Prefabricated Building and Intelligent Construction, Tianjin 300401, China
Abstract: Geopolymer has excellent chemical resistance, whereas the high cracking potential limited its application in concrete protective coating. In the present study, epoxy resin-geopolymer (EG) composites were synthesized to improve the ductility and volumetric stability of geopolymer. To explore the feasibility of EG as marine concrete coating, the influences of resin contents on the corrosion resistance and durability of EG in seawater environment were investigated via physical and mechanical testing, seawater conditioning, linear polarization resistance testing, scanning electron microscopy and N2-adsorption BJH tests. Compared to pure geopolymer, the shrinkage of EG with 20%—30% of resin during curing and after wet-dry cycling was decreased, with which the residual strength of EG was higher than geopolymer after 56 d seawater soaking. For EG coating, the adhesive strength and chloride corrosion resistance were increased with resin content. The linear polarization resistance of EG coa-ting with 30wt% of epoxy resin was about 11 times of the sample without coating after 3 rounds of seawater wet-dry cyclings. The microstructure characterization indicated that the decreased dominant pore size and embedment of resin improved the compactness and energy adsorption capability of geopolymer, and contributed to the decreased shrinkage and enhanced durability of EG. The findings suggested that EG composite can provide promising alternative as anticorrosion coating in marine environment.
1 Ma C K, Awang A Z, Omar W. Construction and Building Materials, 2018, 186, 90. 2 Temuujin J, Rickard W, Lee M, et al. Journal of Non-Crystalline Solids, 2011, 357, 1399. 3 Tahri W, Abdollahnejad Z, Mendes J, et al. European Journal of Environmental and Civil Engineering, 2016, 21, 555. 4 Zhang Y S, Sun W, Chen Q L, et al. Journal of Hazardous Materials, 2007, 143, 206. 5 O'Connell M, McNally C, Richardson M G. Cement Concrete Composites, 2010, 32, 479. 6 Cioffi R, Maffucci L, Santoro L. Resources, Conservation and Recycling, 2003, 40, 27. 7 Zhang M, El-Korchi T, Zhang G P, et al. Fuel, 2014, 134, 315. 8 Sakulich A R, Anderson E, Schauer C, et al. Construction and Building Materials, 2009, 23, 2951. 9 Zhang M, Zhao M G, Zhang G P. Construction and Building Materials, 2016, 124, 373. 10 Zhang L Y, Ahmari S, Zhang J H. Construction and Building Materials, 2011, 25, 3773. 11 Val D V, Stewart M G. Structural Safety, 2003, 25, 343. 12 Otieno M, Beushausen H, Alexander M. Cement and Concrete Research, 2016, 79, 373. 13 Pan X Y, Shi Z G, Shi C J. Construction and Building Materials, 2017, 132, 578. 14 Ahmad S, Gupta A P, Sharmin E, et al. Progress in Organic Coatings, 2005, 54, 248. 15 Reddy D V, Edouard J B, Sobhan K. Journal of Materials in Civil Engineering, 2013, 25, 781. 16 Chindaprasirt P, Chalee W. Construction and Building Materials, 2014, 63, 303. 17 Palomo A, Blanco-Varela M T, Granizo M L, et al. Cement and Concrete Research, 1999, 29, 997. 18 Astutiningsih S, Nurjaya D M, Ashadi H W, et al. Advances in Science and Technology, 2010, 69, 92. 19 Aguirre-Guerrero A M, Robayo-Salazar R A, de Gutiérrez R M.Applied Clay Science, 2017, 135, 437. 20 Zhang Z H, Yao X, Wang H. Applied Clay Science, 2012, 67-68, 57. 21 Zhang Z H, Yao X, Zhu H J. Applied Clay Science, 2010, 49, 1. 22 Timakul P, Rattanaprasit W, Aungkavattana P. Ceramics International, 2016, 42, 6288. 23 Bhutta A, Farooq M, Zanotti C, et al. Materials and Structures, 2017, 50, 1. 24 Giuseppina R, Laura R, Oreste T, et al. Materials (Basel), 2016, 9, 461. 25 Colangelo F, Roviello G, Ricciotti L, et al. Materials, 2013, 6, 2989. 26 Ferone C, Roviello G, Colangelo F, et al. Applied Clay Science, 2013, 73, 42. 27 Du J, Bu Y H, Shen Z H, et al. Materials & Design, 2016, 109, 133. 28 Zhang S Z, Gong K C, Lu J W. Materials Letters, 2004, 58, 1292. 29 Zhang Y J, Wang Y C, Xu D L, et al. Materials Science and Engi-neering: A, 2010, 527, 6574. 30 Li Z, Chen R, Zhang L Y. Journal of Materials Science, 2013, 48, 7986. 31 Roviello G, Menna C, Tarallo O, et al. Materials & Design, 2015, 87, 82. 32 ASTM, ASTM C191-13, Standard Test Methods for Time of Setting of Hydraulic Cement by Vicat Needle, ASTM International, 2013. 33 ASTM, ASTM G59-97, Standard Test Method for Conducting Potentiodynamic Polarization Resistance Measurements, West Conshohocken, PA, 2014. 34 Bernal S A, Bejarano J, Garzón C, et al. Composites Part B: Enginee-ring, 2012, 43, 1919. 35 Zhao Q, Nair B, Rahimian T, et al. Journal of Materials Science, 2007, 42, 3131. 36 Ahmari S, Zhang L. Construction and Building Materials, 2013, 44, 743.