一种基于层层自组装的新型EPS防腐蚀复合涂层

发布时间：2018-11-23 19:31

【摘要】：目的探索EPS复合涂层的制备方法,并对其防腐蚀效果进行验证。方法将层层自组装技术(Lb L)引入EPS复合涂层的制备中,利用纳米SiO_2、PAH聚合弱电解质与EPS之间的静电吸附作用,制备稳定、均匀的复合涂层,采用Zeta电位、平均粒径、腐蚀失重、电化学、SEM、XRD等测试涂层稳定性和防腐蚀效果。结果 Zeta电位、溶液平均粒径测试、腐蚀失重实验和电化学实验结果表明,当纳米SiO_2溶液中SiO_2质量分数为1.5%、溶剂中乙醇质量分数为30%,PAH溶液中PAH质量浓度为2 mg/m L,EPS溶液中EPS质量浓度为200 mg/L,浸涂层数n=7时,涂层防腐蚀效果最为持久、高效、稳定。与碳钢和只浸涂EPS的碳钢相比,浸涂有Lb L的碳钢15 d腐蚀期后的腐蚀产物排列最为致密、有规律,且腐蚀电流密度变化最为平稳,具有最低电流密度和最大交流阻抗。结论得出了基于Lb L的EPS复合涂层最优参数及制备方法,与碳钢和只浸涂EPS的碳钢相比,浸涂Lb L的碳钢防腐蚀效果最好。
[Abstract]:Objective to explore the preparation method of EPS composite coating and to verify its corrosion-proof effect. Methods layer by layer self-assembly technique (Lb L) was introduced into the preparation of EPS composite coatings. Stable and uniform composite coatings were prepared by using the electrostatic adsorption between SiO_2,PAH polymeric weak electrolytes and EPS. Zeta potential and average particle size were used. Corrosion weight loss, electrochemistry, SEM,XRD and so on test coating stability and corrosion resistance. Results the results of Zeta potential, average particle size, corrosion weightlessness and electrochemical experiments showed that when the mass fraction of SiO_2 was 1.5 in nanoscale SiO_2 solution, the ethanol content in solvent was 30wt%. When the mass concentration of PAH in PAH solution is 2 mg/m / L EPS solution and the mass concentration of EPS is 200 mg/L, coating number n = 7, the anticorrosion effect of the coating is the most durable, efficient and stable. Compared with carbon steel and carbon steel only coated with EPS, the corrosion products of carbon steel coated with Lb L after 15 d corrosion period are most compact and regular, and the corrosion current density is the most stable, with the lowest current density and the maximum AC impedance. Conclusion the optimum parameters and preparation methods of EPS composite coating based on Lb L are obtained. Compared with carbon steel and carbon steel impregnated with EPS, Lb L coated carbon steel has the best anticorrosion effect.
【作者单位】：北京建筑大学城市雨水系统与水环境省部共建教育部重点实验室;
【基金】：国家自然科学基金(51578035) 北京建筑大学基金项目(00331615008) 城市雨水系统与水环境省部共建教育部重点实验室项目(PXM2014 014210 000057)~~
【分类号】：TG174.46

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