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Electrophoretic deposition of chitosan films doped with Nd2Ti2O7 nanoparticles as protective coatings against corrosion in saline solutions
Alfredo Quinto-Hernandez
Jan Mayén Chaires
Maraolina Dominguez_Diaz
José Gonzalo González Rodríguez
Lorenzo Martínez Gómez
Acceso Abierto
In this study, the electrophoretic deposition of chitosan films doped with Nd2Ti2O7 nanoparticles was carried out as corrosion protection systems for exposed materials in aqueous environments rich in chlorides. Completely crystalline Nd2Ti2O7 nanoparticles with an average size of 100-200 nm were obtained. Electrophoretic deposition of chitosan films with Nd2Ti2O7 nanoparticles was possible. With a working voltage of 5 V and 20 minutes of deposition, homogenous chitosan films with a thickness of 4 microns were obtained. According to the FT-IR (Fourier transform infrared spectroscopy), Raman, and XRD (X-ray diffraction) analyses, it was observed that the presence of the nanoparticles modified the properties of the chitosan films, that is, their crystallinity was increased and their moisture absorption capacity was reduced. These modifications caused a better performance against the corrosion of chitosan films deposited on 1018 carbon steel. Its electrochemical evaluation showed that the chitosan films perform as cathodic coatings by affecting the oxygen reduction reaction. This was possible due to the barrier effect of the Nd2Ti2O7 nanoparticles, by blocking the effective area for the diffusion of the aggressive electrolyte species.
Maritza Martínez Gómez y H. Martínez, primer autor y colaborador.
The data used to support the findings of this study are available from the corresponding author upon request.
Conflicts of Interest: The authors declare that there are no conflicts of interest regarding the publication of this paper.
Acknowledgments. Financial support from the Consejo Nacional de Ciencia y Tecnología (CONACYT, México) (Project 232611 “Laboratorio Nacional de Materias Primas, Metalurgia y Aleaciones Estratégicas Basadas en Tierras Raras Orientadas a Fortalecer la Sustentabilidad de los Sectores Energía, Transporte y Comunicaciones”) is gratefully acknowledged. The authors are grateful for the comments and support provided by M. Casales-Diaz and J.J. Ramos-Hernandez.
International Journal of Polymer Science, vol. 2019, Article ID 3864835
Público en general
M. Martinez-Gomez, A. Quinto-Hernandez, N. S. Flores-Garcia, et al., “Electrophoretic Deposition of Chitosan Films Doped with Nd2Ti2O7 Nanoparticles as Protective Coatings against Corrosion in Saline Solutions,” International Journal of Polymer Science, vol. 2019, Article ID 3864835, 17 pages, 2019.
Versión publicada
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