纳米Al2O3掺杂酚醛/环氧复合涂层的耐腐蚀性能
Corrosion Resistance of Nano Al2O3 Doped Phenolic Resin/Epoxy Composite Coatings
摘 要
以酚醛树脂(PF)改性环氧树脂(EP)为基体,将硅烷改性的纳米Al2O3掺杂其中,制备了纳米Al2O3-PF/EP复合涂层。利用红外光谱仪(FTIR)、接触角测量仪和电化学阻抗谱(EIS)等测试方法对复合涂层进行了表征。结果表明:硅烷改性的纳米Al2O3和PF与EP之间发生了化学反应,酚醛固化涂层的抗渗透性和交联密度提高;纳米Al2O3-PF/EP复合涂层的耐腐蚀性能优于EP涂层和PF/EP涂层,且掺杂3%(质量分数)纳米Al2O3的PF/EP复合涂层,其耐腐蚀性能最优;硅烷改性的纳米Al2O3与PF/EP之间的分散性和稳定性提高,涂层变得更致密,阻碍了腐蚀性介质的扩散,从而提高复合涂层的耐腐蚀性能。
电化学阻抗谱
改性环氧树脂
腐蚀机理
composite coating
electrochemical impedance spectroscopy
modified epoxy resin
corrosion mechanism
Abstract
Using phenolic resin (PF) modified epoxy resin (EP) as the matrix and doping silane-modified nano-Al2O3 into it, the nano Al2O3-PF/EP composite coating was prepared. The composite coatings were characterized by testing techniques such as infrared spectroscopy (FTIR), contact angle measurement and electrochemical impedance spectroscopy (EIS). The results showed that the silane modified nano-Al2O3 and PF reacted with EP, the permeability and crosslinking density of the coating cured by PF were improved. The corrosion resistance of nano Al2O3-PF/EP composite coating was better than that of EP coating and PF/EP coating, and the composite coating doped with nano-Al2O3 mass fraction of 3% had the best corrosion resistance. The dispersion and stability between nano-Al2O3 modified by silane and PF/EP were increased, and the coating becomed denser, which hindered the diffusion of corrosive medium, thus the corrosion resistance of composite coating was improved.
中图分类号 TG174 DOI 10.11973/fsyfh-202303005
所属栏目 试验研究
基金项目 第三批智汇郑州·1125聚才计划——创新紧缺人才(郑政[2018]-45号-15);河南省科技攻关项目(202102310591,212102210061)
收稿日期 2022/5/10
修改稿日期
网络出版日期
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引用该论文: ZHANG Ruizhu,BAO Zhongbao,GUO Pengyan,ZHANG Zhifang,LI Yanyan,FENG Jiahe. Corrosion Resistance of Nano Al2O3 Doped Phenolic Resin/Epoxy Composite Coatings[J]. Corrosion & Protection, 2023, 44(3): 31
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【3】NAZARI M H,ZHANG Y,MAHMOODI A,et al. Nanocomposite organic coatings for corrosion protection of metals:a review of recent advances[J]. Progress in Organic Coatings,2022,162:106573.
【4】HOSSEINPOUR A. Recent advances and future perspectives for carbon nanostructures reinforced organic coating for anti-corrosion application[J]. Surfaces and Interfaces,2021,23:100994.
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