Résumé : |
The idea of self-healing coatings is very attractive. In fact, automotive coatings that self-heal fine scratches when warmed in the sun have been commercialized. There is particular interest in developing self-healing coatings for substrates that are components of critical and/or expensive assets that are constantly exposed to corrosive environments, such as nuclear reactors, large chemical storage tanks, bridges, and other infrastructure. Initial efforts at developing self-healing anticorrosion coatings have focused on the incorporation of encapsulated resins and catalysts that are intended to be released when the pH or other environmental conditions change as a result of the presence of corrosion. Controlling the release of the ingredients and ensuring that they reach the site of corrosion have been challenging, however. |