Smart coating based on double stimuli-responsive microcapsules containing linseed oil and benzotriazole for active corrosion protection

abstract

Microcapsules containing linseed oil were synthesized by in situ polymerization method and benzotriazole was entrapped between polyelectrolytes layers assembled outside the microcapsules, using the Layer-by-Layer technique. The prepared microcapsules presented mean number diameter of 2.08 pm and released greater amount of benzotriazole in slightly acidic NaCI solution. The corrosion protection effect of the microcapsules was evaluated using a carbon steel substrate coated with an epoxy resin loaded with the microcapsules (4.8 wt %). Electrochemical impedance spectroscopy demonstrated the best performance of the loaded coating when compared to a control due to the stimuli-responsive release of linseed oil and benzotriazole.

keywords

SELF-HEALING COATINGS; NANOCONTAINERS; INHIBITOR; STEEL; MEDIA; MICRO

subject category

Materials Science; Metallurgy & Metallurgical Engineering

authors

Leal, DA; Riegel-Vidotti, IC; Ferreira, MGS; Marino, CEB

our authors

acknowledgements

Authors are grateful to CAPES for the scholarship and financial support for developing this research (PVE-CAPES project no 88881.064969/2014-01). We thank UFPR, SENAI-PR and UA for the infrastructure and CNPq for the productivity fellowships.

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