Comparison of corrosion resistance of a hybrid dye-caly nanopigment (DCNP) and a conventional organic pigment in epoxy coating

The major objective of this study was to synthesis a hybrid dye-clay nano-pigment (DCNP) through cationic exchange reaction of methylene blue (i.e. MB) and Cloisite 15A (i.e. C15A) and its application in an epoxy coating. In fact, we wanted to prepare a high-performance blue pigment with both cationic dye and nano-clay features. Synthesizedhybrid pigment and prepared epoxy coatings were characterized by using different techniques including CHNS and electrochemical impedance spectroscopy (EIS). Results showed that cationic exchange reaction between MB and C15A significantly improved the thermal stability of MB. DCNP represented better dispersion and more intercalated/exfoliated structure in epoxy coating in comparison with that of C15A. Finally, the best corrosion protection performance was observed when DCNP was incorporated into the coating formulation.

کلیدواژه ها:

Nano-clay ، Nanopigment ، Methylene blue ، Epoxy coating ، Appearance ، Corrosion performance