摘要
采用浓酸(浓硫酸/浓硝酸)对多壁碳纳米管(MWCNTs)进行预处理,并用红外光谱图表征.在60℃下利用超声波进行分散,制备多壁碳纳米管(MWCNTs)/环氧树脂复合涂料.将涂料涂于Q235钢材上,在模拟油田水中进行耐腐蚀试验,通过Tafel极化曲线法计算比较了复合涂料与纯环氧树脂的腐蚀速率.红外光谱图结果表明:经过浓酸氧化,多壁碳纳米管生成了羟基、羧基等活性基团,有利于环氧树脂的固化和碳纳米管在树脂中的均匀分散.Tafel曲线法表明,复合涂层对空白电极的保护效率高达83.7%,比纯环氧涂层的75.7%高出8个百分点,复合涂层的保护效果更佳.
MWCNTs are pre-treated with concentrated acid （vitriol/nitric acid）, and characterized with IR. MWCNTs/ epoxy resin composite coating is prepared under the condition of 60 ℃ and dispersed with ultrasonic. The coating is daubed on the Q235 steel and tested for corrosion-resisting in the simulated oil-field brine. The corrosion rate of the composite coating and pure epoxy resin are calculated and compared with Tafel curve. The results of infrared spectroscopy show that after being oxidized with concentrated acid, active groups such as hydroxy and carboxyl are generated on the surface of MWCNTs that are in favor of the solidification of epoxy resin and the uniform dispersion of the MWCNTs in resin. Tafel curve shows that the protection efficiency of the composite coating to electrodes reached 83.7%, 8% higher than 75.7% of the pure epoxy coating, and the composite coating protects electrodes better.
出处
《衡水学院学报》
2017年第4期21-25,共5页
Journal of Hengshui University
基金
河北省科技计划项目(15211233)
