Antrittsvorlesung: Prof. Dr. Mikhail Zheludkevich

08.12.2014 von 16:45 bis 18:15

Institut für Materialwissenschaft, Kaiserstr. 2, Raum: "Aquarium" Geb. D

Titel: Multi-functional active protective coatings, from dreams to real application

Abstract:

The destructive effect of environment and the corrosion induced degradation are the important problems which determine the service life of many metallic components. An active protection approach based on “self-healing” of defects in coatings is one of the most promising ways to ensure long-term protection effect.

The active corrosion protection of metallic substrates can be achieved by the addition of various healing agents such us corrosion inhibitors to the protective coatings. However, direct mixing of an inhibitor with coating formulations can lead to important drawbacks decreasing barrier properties of the coating and diminishing activity of the inhibitor.

The present work shows a new contribution to the development of novel active protective coating with self-healing ability on the basis of nanocontainers that release entrapped corrosion inhibitor in response to presence of corrosive species. The combination of different nanocontainers in the same coating system was demonstrated to provide an important cooperative effect especially when active coatings for hybrid assemblies are considered. The possibility of multi-level active protection based on different healing mechanisms is also demonstrated.

The question of transferability of the active protective coating approach to the biomedical applications, particularly to the control of degradation rate of bioabsorbable metallic implants, is also addressed.

Prof. Quandt, Dekan

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