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Polyaniline coated core-shell polyacrylates for corrosion protection

Researchers synthesized aqueous polymer colloidal nanoparticles, composed by poly(methyl metacrylate), butyl acrylate, and acrylic acid, as “core” (P(MMA/BA/AA)); and polyaniline (PAni) doped with dodecylbenzenesulfonic acid (DBSA), as “shell” in order to investigate corrosion protection of metal. Free radical emulsion polymerization, followed by a second step where the chemical oxidative polymerization of aniline monomers upper the “core” surfaces was used in the synthesis. The results showed that the presence of a low concentration of PAni-DBSA (3 wt. %) on the acrylic polymer altered the hydrophilicity and the water uptake properties of the coatings without affecting the capability of obtaining passive layers for the protection of phosphatized carbon steel surface against corrosion, even after almost 20 days of immersion in NaCl aggressive solutions.

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Journal reference: Progress in Organic Coatings, Volume 128, March 2019, Pages 40-51

Provided by: Copyright © 2018 Elsevier B.V. or its licensors or contributors

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