许萍,高飞,翟羽佳,汪长征,张雅君,魏智刚,黄俊杰.一种基于层层自组装的新型EPS防腐蚀复合涂层[J].表面技术,2017,46(7):13-19.
XU Ping,GAO Fei,ZHAI Yu-jia,WANG Chang-zheng,ZHANG Ya-jun,WEI Zhi-gang,HUANG Jun-jie.A New EPS Anticorrosive Composite Coating Based on Layer-by-Layer Assembly[J].Surface Technology,2017,46(7):13-19 |
| 一种基于层层自组装的新型EPS防腐蚀复合涂层 |
| A New EPS Anticorrosive Composite Coating Based on Layer-by-Layer Assembly |
| 投稿时间：2017-02-01 修订日期：2017-07-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2017.07.003 |
| 中文关键词: 胞外聚合物 纳米SiO2 层层自组装 复合防腐蚀涂层 EIS电化学测试 |
| 英文关键词:extracellular polymeric substance (EPS) nano-silica layer-by-layer self-assembly multi-layer anti-corrosive coating electrochemical impedance spectroscopy (EIS) |
| 基金项目: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） |
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| Author | Institution |
| XU Ping | Key Laboratory of Urban Stormwater System and Water Environment, Ministry of Education, Beijing University of Civil Engineering and Architecture, Beijing 100044, China |
| GAO Fei | Key Laboratory of Urban Stormwater System and Water Environment, Ministry of Education, Beijing University of Civil Engineering and Architecture, Beijing 100044, China |
| ZHAI Yu-jia | Key Laboratory of Urban Stormwater System and Water Environment, Ministry of Education, Beijing University of Civil Engineering and Architecture, Beijing 100044, China |
| WANG Chang-zheng | Key Laboratory of Urban Stormwater System and Water Environment, Ministry of Education, Beijing University of Civil Engineering and Architecture, Beijing 100044, China |
| ZHANG Ya-jun | Key Laboratory of Urban Stormwater System and Water Environment, Ministry of Education, Beijing University of Civil Engineering and Architecture, Beijing 100044, China |
| WEI Zhi-gang | Key Laboratory of Urban Stormwater System and Water Environment, Ministry of Education, Beijing University of Civil Engineering and Architecture, Beijing 100044, China |
| HUANG Jun-jie | Key Laboratory of Urban Stormwater System and Water Environment, Ministry of Education, Beijing University of Civil Engineering and Architecture, Beijing 100044, China |
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| 中文摘要: |
| 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（LbL）引入EPS复合涂层的制备中，利用纳米SiO2、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SiO2溶液中SiO2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/mL，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LbL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LbL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LbL的碳钢防腐蚀效果最好。 |
| 英文摘要: |
| The work aims to explore preparation method of EPS composite coating, and verify its anti-corrosion effect. Based upon electrostatic adsorption among nano-silica and poly (allylamine hydrochloride, PAH) and entrapping extracellular polymeric substances (EPS), a stable and uniform composite coating was prepared by introducing Layer-by-Layer (LbL) self-assembly technology. Stability and anti-corrosion effect of the coating were analyzed by means of Zeta potential, average grain diameter, corrosion weight loss experiment, electrochemical testing, X-ray diffractometer (XRD) and scanning electron microscope (SEM). Zeta potential, average grain diameter test of nano-silica solution, corrosion weight loss experiment and electrochemical experiment indicated that, the coating had the most efficient, stable and lasting anti-corrosion effect provided with mass percent of 1.5wt%, alcohol fraction of 30%, EPS solution concentration of 200 mg/L and layer number of n=7. Scanning electron microscope (SEM), XRD and electrochemical impedance spectroscopy (EIS) results showed that carbon steel coated with LbL multi-layer coating had more compact and orderly corrosion products (quantities of Fe3O4) after being exposed to corrosive conditions for 15 days, lowest corrosive electric current density and maximum impedance. Optimum parameters and preparation method of LbL-based EPS composite coating are obtained. Compared with the original carbon steel and EPS coating, the anti-corrosion effect of the multi-layer EPS coating coated with LbL is the best. |
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