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Influence of Nano- CaCO3 Concentrates on Corrosion Resistance of the Epoxy Coatings |
Liu Mingming1 Liu Fuchun1 Han En-Hou1 Tang Nan2 Wan Junbiao2 Deng Jingwei2 |
1. State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016 2. Jiangxi Electric Power Research Institute, Nanchang 330096 |
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Cite this article:
Liu Mingming Liu Fuchun Han En-Hou Tang Nan Wan Junbiao Deng Jingwei. Influence of Nano- CaCO3 Concentrates on Corrosion Resistance of the Epoxy Coatings. Chinese Journal of Materials Research, 2013, 27(4): 425-431.
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Abstract In highly-dispersed and stable nano-CaCO3 concentrates, the Sa10 hyperdispersant firmly adsorbed on the surface of CaCO3 nanoparticles and a adsorptive layer formed. Nano-CaCO3 concentrates improved the epoxy coating adhesion and the corrosion resistance. A adsorptive layer produced steric effect and hindered the nano-CaCO3 particles to aggregate, while the solvatable layer transfered nano-CaCO3 particles from the polarity shift to nonpolarity, increasing their compatibility with the epoxy resin, which ensured their uniformity and stable dispersion in the epoxy coatings. Thereby nano-CaCO3 concentrates enhanced the physical shielding of the coatings, and improved the corrosion resistance.
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