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Preparation and Performance of Smart Coating Doped with Nanocontainers of BTA@MSNs-SO3H-PDDA for Anti-corrosion of Carbon Steel |
WEN Jiaxin1( ), ZHANG Xin1, LIU Yunxia1, ZHOU Yongfu2, LIU Kejian2 |
1.School of Civil Engineering, Chongqing Industry Polytechnic College, Chongqing 401120, China 2.School of Chemistry and Pharmaceutical Engineering, Chongqing Industry Polytechnic College, Chongqing 401120, China |
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Abstract Organic coatings are commonly used as an effective strategy for protecting carbon steel from corrosion, but the traditional organic coatings are susceptible to generate micron cracks or defects during service, resulting in the premature failure. In view of this problem, a novel benzotriazole containing nanocontainers, namely BTA@MSNs-SO3H-PDDA with pH-sensitivity was prepared firstly, then a BTA@MSNs-SO3H-PDDA doped smart organic coating was fabricated for application on carbon steel. The structure and performance of BTA@MSNs-SO3H-PDDA were characterized by scanning electron microscopy (SEM), dynamic light scattering analysis (DLS), X-ray diffraction analysis (XRD), infrared spectroscopy (FT-IR), thermogravimetry (TGA) and ultraviolet-visible spectroscopy (UV-Vis). The protective performance of the smart coatings for carbon steel was evaluated by electrochemical impedance spectroscopy and salt spray accelerated tests. The results showed that the particles of BTA@MSNs-SO3H-PDDA are near-spherical in shape, with an average diameter of 718 nm. The amount of BTA loaded in BTA@MSNs-SO3H-PDDA is about 13.37%. The releasing rate of BTA from BTA@MSNs-SO3H- PDDA can be accelerated via the sensitive response of the pH changes. The prepared smart coating based on BTA@MSNs-SO3H-PDDA presents remarkable anti-corrosion performance for carbon steel.
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Received: 04 March 2021
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Fund: General Projects of Chongqing Natural Science Foundation(cstc2020jcyj-msxmX1067);Science and Technology Research Program of Chongqing Municipal Education Commission(KJQN202103202) |
Corresponding Authors:
WEN Jiaxin
E-mail: 18523976826@163.com
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About author: WEN Jiaxin, E-mail: 18523976826@163.com
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