摘要
针对海洋大气环境下普通碳钢用复合环氧防护涂层进行制备与耐蚀性研究。通过硅烷偶联剂对玻璃鳞片改性,将改性后的玻璃鳞片加入到环氧树脂中制备玻璃鳞片/环氧涂层。通过傅里叶红外光谱仪分析玻璃鳞片结构,利用电化学阻抗谱对比研究涂层耐蚀性,并通过中性盐雾实验评判海洋环境下涂层保护性能。实验结果表明,利用增加羟基配对位的方法可成功对玻璃鳞片表面改性,且玻璃鳞片对溶液中腐蚀性介质有良好的屏蔽作用,显著提高了环氧涂层的耐腐蚀性能。30%(质量分数)玻璃鳞片改性环氧涂层浸泡648 h后阻抗模值|Z|在107.6Ω·cm^2以上,远高于普通环氧涂层阻抗。计算得到30%玻璃鳞片改性涂层中水分子的扩散系数D为2.07×10^-11 cm^2/s,远小于普通环氧涂层的扩散系数1.9×10^-9 cm^2/s。
Glass flakes were modified with silane coupling agent,and characterized by Fourier transform infrared spectroscopy(FTIR).Then the modified glass flakes were blend with epoxy resin to prepared composite glass/epoxy paint.Further,the corrosion performance of the composite glass/epoxy coated carbon steel was assessed by means of neutral salt spray test and electrochemical impedance spectroscopy(EIS).The results show that this method can successfully modify the surface of glass flakes by increasing hydroxyl pairing,and the glass flakes have a good shielding effect on corrosive media in solution,which significantly improves the corrosion resistance of epoxy coatings.30%(mass fraction)glass flake modified epoxy coating immersed in 3.5% NaCl solution for 648 h,the impedance modulus Z was above 107.6Ω∙cm^2,which was much higher than that of ordinary epoxy coating.The diffusion coefficient D of water molecule in 30% glass flake modified coatings is 2.07×10^-11 cm^2/s,which is much smaller than that of ordinary epoxy coating 1.9×10^-9 cm^2/s.
作者
颜晨曦
王胜荣
张天翼
杨建炜
曹建平
YAN Chenxi;WANG Shengrong;ZHANG Tianyi;YANG Jianwei;CAO Jianping(Shougang Research Institute of Technology,Beijing 100043,China;Key Laboratory for Corrosion and Protection,Corrosion and Protection Center,University of Science and Technology Beijing,Beijing 100083,China)
出处
《腐蚀科学与防护技术》
CAS
CSCD
北大核心
2019年第6期597-602,共6页
Corrosion Science and Protection Technology
基金
国家重点研发项目(2016YFC0401205)~~
