摘要
研发了可用于生锈碳钢表面的醋酸激发水泥基防腐涂层。试验设计了19组配合比,通过综合考察水泥基材料的力学性能、粘结强度和涂层涂装性能,确定了涂层最优配比。通过X射线衍射试验、水化热试验和扫描电镜测试,阐述了醋酸激发水泥的作用机理;通过电化学阻抗试验研究了涂层的防腐性能。结果表明,醋酸激发能够加速水泥早期水化反应,浆体硬化时间缩短,促进早期强度发展;醋酸使水泥颗粒团被分散,涂层表面水泥颗粒之间连接紧密,涂层密度高、防锈性能良好,其在3.5%NaCl溶液中浸泡20 d的电荷转移电阻仍可达到3.68×10^(5)Ω·cm^(2)。
An acetic acid-activated cementitious anticorrosive coating for rusty carbon steel was developed.Nineteen groups of mixtures were designed and the optimal mixture of the coating was ascertained by comprehensively examining the mechanical properties,bonding strength and coating performance of the cementitious materials.Based on the heat of cement hydration,X-ray diffraction tests and scanning electron microscopy tests,the mechanism of acetic acid activation of cement was elucidated.The anticorrosive performance of the coating was studied through electrochemical impedance tests.The results show that the acetic acid activation can accelerate the early hydration of cement,whereby the hardening time of the paste is shorted and promoting the development of early strength.The cement particles are dispersed by acetic acid,and on the coating surface are tightly connected,with a high coating density and favorable anticorrosion property.The charge transfer resistance of the coating,after soaking in a 3.5%NaCl solution for 20days,remain attaining 3.68×10^(5)Ω·cm^(2).
作者
王嘉豪
陈柏全
杨政险
WANGJia-hao;CHEN Bo-quan;YANG Zheng-xian(School of Advanced Manufacturing,Fuzhou University,Jinjiang 362251,China;Fujian Provincial University Research Center for Advanced Civil Engineering Materials,College of Civil Engineering,Fuzhou University,Fuzhou 350108,China)
出处
《武汉理工大学学报》
CAS
2024年第5期1-8,共8页
Journal of Wuhan University of Technology
基金
国家自然科学基金(51978171)
福州市科技局科技平台创新项目(2021-P-031).
关键词
酸激发
钢铁锈蚀
水泥基材料
防腐涂层
水化热
电化学阻抗
acid-activated
steel corrosion
cementitious materials
anticorrosive coating
heat of hydration
electrochemical impedance
