TY - JOUR
T1 - Synthesis and characterization of polyaniline-based polymer nanocomposites as anti-corrosion coatings
AU - Rangel-Olivares, Francisco R.
AU - Arce-Estrada, Elsa M.
AU - Cabrera-Sierra, Román
N1 - Publisher Copyright:
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.
PY - 2021/6
Y1 - 2021/6
N2 - Polymer nanocomposites of polyaniline (PANI)-based metal oxides (SiO2, CeO2, and TiO2 A) were synthesized by in situ chemical oxidative polymerization by rapid mixing in a hy-drochloric acid medium to evaluate and compare their performance as anti-corrosion coatings on commercial 1018 steel in a 3.5% NaCl medium. The anti-corrosion coatings were developed by dis-persing synthesized nanocomposites on an alkydalic resin (AR) for their subsequent electrochemical characterization. X-ray diffraction (XRD) analyses show that PANI has a certain degree of crystallinity in its structure. The incorporation of metal oxide (MO) nanoparticles (NPs) into the polymer matrix was confirmed by scanning electron microscopy and energy-dispersive X-ray spectroscopy (SEM-EDS) analyses, while the interaction of nanoparticles with PANI was proven by Fourier transform infrared (FT-IR) and ultraviolet-visible (UV-vis). Thermogravimetric analysis (TGA) reveals that nanoparticles infer greater resistance to the thermal decomposition of PANI. Finally, the use of open circuit potential (OCP) study, Tafel curves, and electrochemical impedance spectroscopy (EIS) showed that coatings made with TiO2 A NPs exhibit the best anti-corrosion properties as compared to those synthesized with SiO2 and CeO2 NPs.
AB - Polymer nanocomposites of polyaniline (PANI)-based metal oxides (SiO2, CeO2, and TiO2 A) were synthesized by in situ chemical oxidative polymerization by rapid mixing in a hy-drochloric acid medium to evaluate and compare their performance as anti-corrosion coatings on commercial 1018 steel in a 3.5% NaCl medium. The anti-corrosion coatings were developed by dis-persing synthesized nanocomposites on an alkydalic resin (AR) for their subsequent electrochemical characterization. X-ray diffraction (XRD) analyses show that PANI has a certain degree of crystallinity in its structure. The incorporation of metal oxide (MO) nanoparticles (NPs) into the polymer matrix was confirmed by scanning electron microscopy and energy-dispersive X-ray spectroscopy (SEM-EDS) analyses, while the interaction of nanoparticles with PANI was proven by Fourier transform infrared (FT-IR) and ultraviolet-visible (UV-vis). Thermogravimetric analysis (TGA) reveals that nanoparticles infer greater resistance to the thermal decomposition of PANI. Finally, the use of open circuit potential (OCP) study, Tafel curves, and electrochemical impedance spectroscopy (EIS) showed that coatings made with TiO2 A NPs exhibit the best anti-corrosion properties as compared to those synthesized with SiO2 and CeO2 NPs.
KW - Anti-corrosion
KW - Coating
KW - Conducting polymer
KW - EIS
KW - Nanocomposite
UR - http://www.scopus.com/inward/record.url?scp=85107872513&partnerID=8YFLogxK
U2 - 10.3390/coatings11060653
DO - 10.3390/coatings11060653
M3 - Artículo
AN - SCOPUS:85107872513
SN - 2079-6412
VL - 11
JO - Coatings
JF - Coatings
IS - 6
M1 - 653
ER -