Lyu Kai, Liu Xiaoyan, Liu Ruidan, Yang Heng, Qiao Yang, Shah Surendra P
College of Civil and Transportation Engineering, Hohai University, Nanjing 210024, China.
Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China.
Polymers (Basel). 2022 Mar 30;14(7):1412. doi: 10.3390/polym14071412.
In the marine service environment, metal materials have a serious risk of corrosion. The corrosion rate of metal materials will be accelerated by the dual action of temperature change and alkali salt in saline-alkali environment. In order to delay the metal materials' corrosion rate and prolong their service life, this paper used a CeO-GO (4:1) nanocomposite prepared by the hydrothermal synthesis method to make an anticorrosion coating. The anticorrosion performance was evaluated by stereo microscope and 3D images of the corrosion site were fitted for calculation. The state evolution of the CeO-GO (4:1)/EP coating immerged in a simulated saline-alkali solution was studied by open circuit potential (OCP), electrochemical alternating current impedance spectroscopy (EIS), Mott-Schottky curve and Tafel curve. The results indicated that CeO-GO (4:1) nanocomposites exhibited good resistance compared with graphene oxide and nano cerium oxide in a simulated saline-alkali environment. The research in this paper lays a firm theoretical foundation for the application of nano cerium-oxide-modified graphene oxide anticorrosive coating in saline-alkali environment engineering.
在海洋服役环境中，金属材料存在严重的腐蚀风险。在盐碱环境中，温度变化和盐碱的双重作用会加速金属材料的腐蚀速率。为了延缓金属材料的腐蚀速率并延长其使用寿命，本文采用水热合成法制备的CeO-GO（4:1）纳米复合材料制备防腐涂层。通过立体显微镜评估防腐性能，并对腐蚀部位的3D图像进行拟合计算。通过开路电位（OCP）、电化学交流阻抗谱（EIS）、莫特-肖特基曲线和塔菲尔曲线研究了CeO-GO（4:1）/EP涂层浸泡在模拟盐碱溶液中的状态演变。结果表明，在模拟盐碱环境中，CeO-GO（4:1）纳米复合材料与氧化石墨烯和纳米氧化铈相比表现出良好的耐蚀性。本文的研究为纳米氧化铈改性氧化石墨烯防腐涂层在盐碱环境工程中的应用奠定了坚实的理论基础。
