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  Formulation of a multifunctional coating based on polyphenols extracted from the Pine radiata bark and functionalized zinc oxide nanoparticles: Evaluation of hydrophobic and anticorrosive properties

Jaramillo, A. F., Montoya, L. F., Prabhakar, J. M., Sanhueza, J. P., Fernández, K., Rohwerder, M., et al. (2019). Formulation of a multifunctional coating based on polyphenols extracted from the Pine radiata bark and functionalized zinc oxide nanoparticles: Evaluation of hydrophobic and anticorrosive properties. Progress in Organic Coatings, 135, 191-204. doi:10.1016/j.porgcoat.2019.06.011.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0006-6BDA-D Version Permalink: http://hdl.handle.net/21.11116/0000-0006-6C0A-7
Genre: Journal Article

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 Creators:
Jaramillo, Andres Felipe1, Author              
Montoya, Luis Felipe2, Author              
Prabhakar, J. Manoj3, Author              
Sanhueza, Juan Pablo4, Author              
Fernández, Katherina5, Author              
Rohwerder, Michael3, Author              
Rojas Jara, David Eduardo6, Author              
Montalba, C.7, Author              
Melendrez, Manuel F.2, Author              
Affiliations:
1Department of Mechanical Engineering, Universidad de La Frontera, Francisco Salazar 01145, Temuco, 4780000, Chile, ou_persistent22              
2Advanced Nanocomposites Research Group (GINA), Department of Materials Engineering (DIMAT), Faculty of Engineering, University of Concepcion, 270 Edmundo Larenas, Box 160-C, Concepcion, 4070409, Chile, ou_persistent22              
3Corrosion, Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_2074315              
4Department of Materials Engineering (DIMAT), Faculty of Engineering, University of Concepcion, 270 Edmundo Larenas, Box 160-C, Concepcion, 4070409, Chile, ou_persistent22              
5Laboratory of Biomaterials, Department of Chemical Engineering, Faculty of Engineering, University of Concepcion, Barrio Universitario s/n, P.O. Box 160-C, Concepción, 4030000, Chile, ou_persistent22              
6Universidad de Concepción, Departamento de Ingeniería de Materiales, Edmundo Larenas 270, Concepción, Chile, ou_persistent22              
7Universidad de Talca, Departamento de Tecnologías Industriales, Camino a Los Niches KM 1, Curicó, Chile, ou_persistent22              

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Free keywords: Atmospheric corrosion; Contact angle; Corrosion protection; Electrochemical corrosion; Epoxy resins; Flavonoids; Fourier transform infrared spectroscopy; Hydrophobicity; II-VI semiconductors; Iron compounds; Nanoparticles; Polarization; Seawater corrosion; Steel corrosion; Tannins; Zinc coatings; Zinc oxide; ZnO nanoparticles, 3-aminopropyltriethoxysilane; Accelerated corrosion tests; Anti-corrosive properties; Corrosion current densities; Electrochemical techniques; Functionalizations; Scanning Kelvin probes; Surface modified nanoparticles, Corrosion resistant coatings
 Abstract: With the purpose of improving the protection of steel ASTM A36 from corrosion, in this paper the use of tannin as an inhibitor was studied by incorporating it in an epoxy resin along with zinc oxide nanoparticles functionalized with 3-aminopropyltriethoxysilane (APTES) in concentrations of 1, 3, and 5w/w. Electrochemical techniques such as polarization curves and EIS for the characterization of the anticorrosive properties, SKP for the study of coating delamination with the substrate, contact angle measurement and other standardized methods were used for the evaluation of the properties of the film. The results of the polarization curves revealed that the corrosion current density of the steel (icorr) decreases markedly with the addition of the tannin extract by changing the cathodic behavior without affecting the active anodic behavior. Likewise, the EIS analysis showed that the coatings with surface modified nanoparticles provide an excellent protection against corrosion that is complemented by the protective layer of the tannin-iron complex formed and the same was confirmed by FTIR spectroscopy after exposing the plates to accelerated corrosion tests in salt spray and weathering chamber. Finally, it could be demonstrated that the incorporation of zinc oxide nanoparticles in the coating formulation subtly improves the film properties and likewise, partially increases the hydrophobicity. © 2019 Elsevier B.V.

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Language(s): eng - English
 Dates: 2019-10
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1016/j.porgcoat.2019.06.011
 Degree: -

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Title: Progress in Organic Coatings
  Abbreviation : Prog. Org. Coat.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Lausanne, Switzerland : Elsevier B.V.
Pages: - Volume / Issue: 135 Sequence Number: - Start / End Page: 191 - 204 Identifier: ISSN: 0300-9440
CoNE: https://pure.mpg.de/cone/journals/resource/0300-9440