1. A Shape-Recovery Polymer Coating for the Corrosion Protection of Metallic Surfaces
- Author
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Erwin Bauters, Herman Terryn, Alexander Lutz, Otto van den Berg, Iris De Graeve, Karen Verheyen, Fillip E. Du Prez, Jonas Van Damme, Materials and Chemistry, Electrochemical and Surface Engineering, Physical Chemistry and Polymer Science, Architectural Engineering, In-Situ Electrochemistry combined with nano & micro surface Characterization, and Materials and Surface Science & Engineering
- Subjects
Materials science ,SVET ,Modulus ,corrosion protection ,engineering.material ,Smart material ,Galvanization ,Corrosion ,Dielectric spectroscopy ,chemistry.chemical_compound ,symbols.namesake ,chemistry ,Coating ,polycaprolactone ,Conversion coating ,smart materials ,Polycaprolactone ,engineering ,symbols ,General Materials Science ,self-healing coatings ,Composite material - Abstract
Self-healing polymer coatings are a type of smart material aimed for advanced corrosion protection of metals. This paper presents the synthesis and characterization of two new UV-cure self-healing coatings based on acrylated polycaprolactone polyurethanes. On a macroscopic scale, the cured films all show outstanding mechanical properties, combining relatively high Young’s modulus of up to 270 MPa with a strain at break above 350%. After thermal activation the strained films recover up to 97% of their original length. Optical and electron microscopy reveals the self-healing properties of these coatings on hot dip galvanized steel with scratches and microindentations. The temperature-induced closing of such defects restores the corrosion protection and barrier properties of the coating as shown by electrochemical impedance spectroscopy and scanning vibrating electrode technique. Therefore, such coatings are a complementary option for encapsulation-based autonomous corrosion protection systems.
- Published
- 2015