Zdrojový dokument:Scientific papers of the University of Pardubice. Series A, Faculty of Chemical Technology. 23/2017
ISSN:1211-5541
Abstrakt:
The main goal of this work was to investigate the corrosion inhibiting and
physical properties of organic coatings containing pigments whose surface had
been modified with a layer of a conductive polymer in comparison with the
untreated pigments. Four perovskite-based pigments, viz. CaTiO3, SrTiO3,
CaMnO3 and SrMnO3, were prepared by high-temperature calcination, and their
surface modified with a layer of the conductive polymer poly(pphenylenediamine).
This modification was achieved by oxidative polymerisation.
The physico-chemical properties of the pigments were examined by XRD, XRF,
and SEM. The composite pigments were used in coatings (paints) based on a
solvent-type epoxy-ester resin. The pigment volume concentration (PVC) in the paints was 1 %, 5 %, 10 %, and 15 %. The paint films were subjected to physicomechanical
tests and accelerated corrosion tests; the respective results being
correlated with the pigment type and concentration and with the surface
modification with poly(p-phenylenediamine) as a conductive polymer. The
anticorrosion and mechanical properties of the paints have been compared to
those of a reference paint containing zinc phosphite hydrate, a proven and
established anticorrosion pigment.