Nanoreservoirs corrosion protection coatings

The paper is devoted to development of novel approach to dope coatings with active anticorrosion species with self-healing ability. They contain nanoreservoirs which can store active agents and provide controllable release of them. The titania nanoparticles doped with cerium ions and organic inhibitors were used as nanocontainers to dope the hybrid sol-gel matrix and to provide long-term corrosion protection. 

To check whether the superior corrosion protection performance of a nanoreservoir-containing coating was related to its self-healing abihty, SVET experiments were performed. A typical current map over an intact sol gel film is depicted in Fig. 2.13a, illustrating the absence of local corrosion processes for both coatings. Artificial defects (200 pm in diameter) were formed on the surface of both coatings after 24 h of immersion in 0.05 M NaCl, as shown in Fig. 2.13b,f. Well-defined cathodic activity appeared at the induced defect on the alloy coated with the undoped hybrid film... 

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