环氧树脂/有机硅氧烷改性阳离子丙烯酸乳液复合涂层的研究  

Epoxy/Organosiloxane Modified Cationic Acrylic Emulsion Composite Coating

作　　者：邹文杰 丁立 张雪姣 陈均[1] ZOU Wenjie;DING Li;ZHANG Xuejiao;CHEN Jun(School of Chemistry and Chemical Engineering,Anhui University of Technology,Ma'anshan 243002,China)

机构地区：[1]安徽工业大学化学与化工学院,马鞍山243002

出　　处：《中国腐蚀与防护学报》2023年第4期922-928,共7页Journal of Chinese Society For Corrosion and Protection

基　　金：国家自然科学基金(U1460106)。

摘　　要：利用合成的有机硅氧烷改性的阳离子型丙烯酸(SMCWA)乳液中的胺基能够固化环氧树脂的原理,在碳钢板表面制备耐腐蚀环氧树脂/SMCWA乳液复合涂层。利用激光纳米粒度仪对SMCWA乳液粒径进行表征,使用Fourier变换红外光谱仪(FT-IR)和扫描电子显微镜(SEM)对复合涂层进行结构和形貌分析,利用CuSO_(4)点滴、电化学测试和中性盐雾实验研究复合涂层的耐蚀能力。结果表明,合成的SMCWA乳液粒径小,分布均匀。相较于空白SMCWA乳液涂层,环氧树脂/SMCWA乳液复合涂层的致密性和耐腐蚀性均得到增强,其中环氧树脂/SMCWA乳液质量比为9.5/0.5的复合涂层,CuSO_(4)点滴时间提高了116 s,电化学阻抗提高了4倍,腐蚀电流密度下降了一个数量级,耐盐雾能力大幅增强。Based on the principle that the amine group in the synthesized organosiloxane-modified cationic acrylic(SMCWA)latex can cure epoxy resin,the corrosion-resistant epoxy resin/SMCWA latex composite coating were prepared on the surface of carbon steel plate.The SMCWA latex was characterized by laser nanometer particle size analyzer.The structure and morphology of the composite coatings were analyzed by FT-IR and SEM.The corrosion resistance of the composite coating was studied by copper sulfate spot test,electrochemical test and neutral salt spray test.The results show that the synthesized stable SMCWA latex has small particle size and uniform particle size distribution.Compared with the blank SMCWA latex coating,the compactness and corrosion resistance of the epoxy resin/SMCWA latex composite coating have been greatly enhanced.When the composite coating prepared with the mass ratio of epoxy resin to SMCWA is 9.5/0.5,as a result,the life-time of copper sulfate corrosion resistance is increased by 116 s;the AC impedance is increased by 4 times,and the corrosion current density is decreased by an order of magnitude in 3.5%NaCl;and the neutral salt spray resistance is also greatly enhanced for the prepared composite coating.

关 键 词：碳钢板 有机硅氧烷改性 阳离子型丙烯酸乳液 环氧树脂 防腐性能 

分 类 号：TQ174.4[化学工程—陶瓷工业]