Study of the Efficiency of Polypyrrole/ZnO Nanocomposites as Additives in Anticorrosion Coatings

We synthesized (ZnO nanoparticles)/polypyrrole (ZnO_NPs/PPy) hybrid nanocomposites and used them as additives in an epoxy paint to protect SAE 1020 carbon steel from corrosion. The nanocomposites were obtained by chemical polymerization of pyrrole in aqueous solution and sodium dodecyl sulfate solut...

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Published inMaterials research (São Carlos, São Paulo, Brazil) Vol. 18; no. suppl 2; pp. 273 - 278
Main Authors Valença, Demétrius Perrelli, Alves, Kleber Gonçalves Bezerra, Melo, Celso Pinto de, Bouchonneau, Nadège
Format Journal Article
LanguageEnglish
Portuguese
Spanish
Published ABM, ABC, ABPol 01.12.2015
Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)
Subjects
conducting polymers
corrosion
ENGINEERING, CHEMICAL
Low carbon steels
MATERIALS SCIENCE, MULTIDISCIPLINARY
METALLURGY & METALLURGICAL ENGINEERING
Nanocomposites
Nanoparticles
Paints
polypyrrole
Polypyrroles
Protective coatings
Transmission electron microscopy
Zinc oxide
polypyrrole
corrosion
conducting polymers
nanocomposites
zinc oxide
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Summary:We synthesized (ZnO nanoparticles)/polypyrrole (ZnO_NPs/PPy) hybrid nanocomposites and used them as additives in an epoxy paint to protect SAE 1020 carbon steel from corrosion. The nanocomposites were obtained by chemical polymerization of pyrrole in aqueous solution and sodium dodecyl sulfate solution containing dispersed ZnO nanoparticles. We characterized the nanoparticles by infrared absorption spectrophotometry, X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). A large disparity in the distribution of ZnO particle sizes became evident from the TEM images, which also show the formation of hybrid nanocomposites consisting of polypyrrole coated ZnO nanoparticles. Electrochemical impedance spectroscopy (EIS) and open circuit potential (OCP) tests, which were performed on SAE 1020 carbon steel plates coated with epoxy and ZnO_NPs/PPy, have shown that epoxy paints have their efficiency as anticorrosive coatings significantly improved when ZnO_NPs/PPy hybrid nanocomposites are added to them.
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ISSN:1516-1439
1980-5373
1980-5373
DOI:10.1590/1516-1439.371614