Halloysite loaded with anticorrosive agent benzotriazole, admixed with paint have been successfully utilized for the protection of Fe, Cu and Al metal surfaces in the past. Anticorrosive coatings for steel and copper have been developed based on halloysite nanotubes loaded with three common corrosion inhibitors; benzotriazole, mercaptobenzothiazole and mercaptobenzimidazole. The inhibitors' loaded tubes were admixed at 5-10 wt % to alkyd paint providing sustained agents release and self-healing in the coating defects. Slow 20-30 hours release of the inhibitors had remarkable effect on anticorrosion efficiency of the coatings. Further time expansion of anticorrosion agents release has been achieved by formation of the tube-end stoppers with urea-formaldehyde copolymer or copper-triazole complexation. Corrosion protection efficiency was tested on iron A 365 alloy in NaCl solution with scanning vibrating microelectrode technique  and using light microscope and paint adhesion tests. The best protection was found for benzotriazole inhibitor and urea-formaldehyde stoppers at halloysite tube endings.

Halloysite clay nanotubes for anticorrosive metal coatings

245th National Meeting (2013)

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.