Institute for Micromanufacturing, Louisiana Tech University, Ruston, Louisiana 71272, United States.
Langmuir. 2013 Jun 18;29(24):7439-48. doi: 10.1021/la3044973. Epub 2012 Dec 18.
Long-lasting anticorrosive coatings for steel have been developed on the basis of halloysite nanotubes loaded with three corrosion inhibitors: benzotriazole, mercaptobenzothiazole, and mercaptobenzimidazole. The inhibitors' loaded tubes were admixed at 5-10 wt % to oil-based alkyd paint providing sustained agent release and corrosion healing in the coating defects. The slow 20-30 h release of the inhibitors at defect points caused a remarkable improvement in the anticorrosion efficiency of the coatings. Further time expansion of anticorrosion agent release has been achieved by the formation of release stoppers at nanotube ends with urea-formaldehyde copolymer and copper-inhibitor complexation. The corrosion protection efficiency was tested on ASTM A366 steel plates in a 0.5 M NaCl solution with the microscanning of corrosion current development by microscopy inspection and studying paint adhesion. The best protection was found using halloysite/mercaptobenzimidazole and benzotriazole inhibitors. Stopper formation with urea-formaldehyde copolymer provided an additional increase in corrosion efficiency as a result of the longer release of inhibitors.
基于负载有三种缓蚀剂（苯并三唑、巯基苯并噻唑和巯基苯并咪唑）的纳米管，开发出了一种长效的钢铁用防腐涂层。将缓蚀剂负载的纳米管以 5-10wt%的比例混入基于油性醇酸树脂的涂料中，以在涂层缺陷处提供持续的缓释和腐蚀修复功能。缓蚀剂在缺陷点的缓慢 20-30 小时释放，显著提高了涂层的防腐效率。通过在纳米管末端形成脲醛共聚物和铜-抑制剂配合物的释放抑制剂，进一步延长了缓释时间。在 0.5M NaCl 溶液中，使用 ASTM A366 钢板通过显微镜检查和研究涂料附着力对腐蚀电流发展进行微扫描，测试了腐蚀防护效率。使用负载有巯基苯并咪唑和苯并三唑抑制剂的沸石/负载有巯基苯并咪唑和苯并三唑抑制剂的沸石，发现了最佳的保护效果。脲醛共聚物形成的止动器由于抑制剂的更长释放，提供了额外的腐蚀效率的提高。
