期刊
LANGMUIR
卷 29, 期 24, 页码 7439-7448出版社
AMER CHEMICAL SOC
DOI: 10.1021/la3044973
关键词
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资金
- [NSF-1029147]
- [NSF-EPS1003897]
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [1029147] Funding Source: National Science Foundation
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.
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