Study of the anticorrosive efficiency of zincite and periclase-based core-shell pigments in organic coatings

The objective of this work was to identify the anticorrosive efficiency of synthesized, MeO/core pigments and of MeO pigments (MeO = ZnO, MgO) with varied morphology of particles. The synthesized MeO-type pigments displayed varied particle morphologies and the MeO/core core-shell pigments exhibited surface of particles made of zincite and periclase. These core-shell pigments have the properties of both the ZnO layer and of the core (wollastonite or graphite). Epoxy-ester based coatings containing the synthesized pigments were also formulated. To test the anticorrosion properties of the coatings, accelerated corrosion tests were carried out in the environment of condensed water, of NaCl mist, and of condensing water and SO(2). The synthesized core-shell pigments have good anticorrosion efficiency in an epoxy-ester coating. (C) 2008 Elsevier B.V. All rights reserved.