abstract
This work contributes to the development of a new generation of active corrosion protection coatings composed of hybrid sol-gel films doped with halloysite nanotubes able to release entrapped corrosion inhibitors in a controllable way. A silica-zirconia-based hybrid film was used in this work as an anticorrosion coating deposited on 2024 aluminum alloy. Halloysite nanotubes with inner voids loaded by corrosion inhibitors (2-mercaptobenzothiazole) and outer surfaces layer-by-tayer covered with polyelectrolyte multilayers were introduced into the hybrid films. The sol-gel film with the nanocontainers reveals enhanced long-term corrosion protection in comparison with the undoped sol-gel film. This effect is obtained because of the self-controlled release of the corrosion inhibitor triggered by the corrosion processes. Utilization of the inner halloysite nanotube lumen as a storage medium for the corrosion inhibitor offers a novel way of fabricating composite core-shell type nanomaterials with their further application as a main component of feedback-active coatings.
keywords
CORROSION PROTECTION; DELIVERY SYSTEM; THIN-FILMS; INHIBITORS; PRETREATMENTS; MICROSPHERES; CHROMATE; SILICA
subject category
Chemistry; Science & Technology - Other Topics; Materials Science
authors
Shchukin, DG; Lamaka, SV; Yasakau, KA; Zheludkevich, ML; Ferreira, MGS; Mohwald, H
our authors
Kiryl Yasakau
Assistant Researcher
Mário Guerreiro Silva Ferreira
Retired Professor