Original scientific paper
https://doi.org/10.5599/jese.1293
Anticorrosive polystyrene coatings modified with tannic acid on zinc and steel substrates
Julia Both
; Babes-Bolyai University, Faculty of Chemistry and Chemical Engineering, RO-400028, Cluj-Napoca, Romania
Gabriella Stefania Szabo
orcid.org/0000-0002-7083-9106
; Babes-Bolyai University, Faculty of Chemistry and Chemical Engineering, RO-400028, Cluj-Napoca, Romania
Gabriel Katona
orcid.org/0000-0003-3508-0023
; Babes-Bolyai University, Faculty of Chemistry and Chemical Engineering, RO-400028, Cluj-Napoca, Romania
Liana Maria Mureșan
orcid.org/0000-0002-2891-2947
; Babes-Bolyai University, Faculty of Chemistry and Chemical Engineering, RO-400028, Cluj-Napoca, Romania
Abstract
Polystyrene (PS) polymer layers were prepared by the sol-gel method and studied as anticorrosive barrier layers on carbon steel and zinc substrates. To increase the corrosion resistance of the coatings, two different approaches were considered: (i) the use of mesoporous silica-nanocontainers impregnated with a corrosion inhibitor (tannic acid) introduced into the polystyrene matrix and (ii) direct impregnation of polystyrene coatings with the same corrosion inhibitor. The impregnated nanocontainers were characterized by transmission electron microscopy. The thickness and the adhesion of the coatings were measured, and their corrosion behavior was investigated by electrochemical impedance spectroscopy. Results showed that the used inhibitor slightly decreased adhesion, but significantly increased the corrosion resistance of the coatings. The direct introduction of tannic acid into the polymer matrix offers higher corrosion resistance than in the case of polystyrene coatings doped with impregnated silica nanocontainers.
Keywords
Polystyrene coatings; corrosion protection; tannic acid; mesoporous silica nanocontainers
Hrčak ID:
283681
URI
Publication date:
18.9.2022.
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