环氧树脂<strong>/</strong>有机硅氧烷改性阳离子丙烯酸乳液复合涂层的研究

doi:10.11902/1005.4537.2022.279

中国腐蚀与防护学报

2023, Vol. 43

Issue (4): 922-928 CSTR: 32134.14.1005.4537.2022.279 DOI: 10.11902/1005.4537.2022.279

研究报告

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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

邹文杰, 丁立, 张雪姣, 陈均(

)

安徽工业大学化学与化工学院马鞍山 243002

Epoxy/Organosiloxane Modified Cationic Acrylic Emulsion Composite Coating

ZOU Wenjie, DING Li, ZHANG Xuejiao, CHEN Jun(

)

School of Chemistry and Chemical Engineering, Anhui University of Technology, Ma'anshan 243002, China

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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CuSO₄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，CuSO₄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。

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

Abstract：

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.

Key words： carbon steel plate organosiloxane modification cationic acrylic emulsion epoxy resin corrosion resistance

收稿日期: 2022-09-09 32134.14.1005.4537.2022.279

ZTFLH:

TQ174.4

基金资助:国家自然科学基金(U1460106)

通讯作者: 陈均，E-mail: junchen@ahut.edu.cn，研究方向为金属表面处理

Corresponding author: CHEN Jun, E-mail: junchen@ahut.edu.cn

作者简介: 邹文杰，男，1993年生，硕士生

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引用本文:

邹文杰, 丁立, 张雪姣, 陈均. 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[J]. 中国腐蚀与防护学报, 2023, 43(4): 922-928.
ZOU Wenjie, DING Li, ZHANG Xuejiao, CHEN Jun. Epoxy/Organosiloxane Modified Cationic Acrylic Emulsion Composite Coating. Journal of Chinese Society for Corrosion and protection, 2023, 43(4): 922-928.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2022.279 或 https://www.jcscp.org/CN/Y2023/V43/I4/922

图1 SMCWA 乳液中乳胶粒子的粒径大小和分布

图2 SMCWA乳液中乳胶粒子的Zeta电位

图3 SMCWA乳液与环氧树脂固化前后的红外光谱图

图4 不同比例SMCWA乳液/环氧树脂复合涂层的SEM图

图5 不同比例SMCWA乳液/环氧树脂复合涂层的水接触角图

图6 不同比例SMCWA乳液/环氧树脂复合涂层的附着力图

图7 不同比例SMCWA乳液/环氧树脂复合涂层的EIS图

图8 SMCWA乳液/环氧树脂复合涂层EIS拟合等效电路图

表1 不同比例SMCWA乳液/环氧树脂复合涂层的EIS拟合结果

图9 不同比例SMCWA乳液/环氧树脂复合涂层的Tafel极化曲线

表2 不同比例SMCWA乳液/环氧树脂复合涂层的腐蚀参数

图10 空白以及SMCWA乳液/环氧树脂比例为9.5/0.5的涂层中性盐雾实验不同时间后的表面形貌

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