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

Abstract

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.

Polypyrrole/Metal Oxides-Based Composites/Nanocomposites for Corrosion Protection

“…It was found that the OCP of nanocomposite was more positive than just PPy and EIS measurements confirmed lower water uptake and lower capacitance suggesting better corrosion protection by PPy/ZnO nanocomposite (Hosseini et al, 2011). Polypyrrole/ZnO nanocomposites have also been obtained by chemical oxidative polymerization (Valença et al, 2015). Prepared PPy/ZnO nanocomposites were incorporated in epoxy coating at 0.2 w/w% loading and applied on SAE 1020 carbon steel.…”

Thermoplastic Elastomers Containing Zinc Oxide as Antimicrobial Additive Under Thermal Accelerated Ageing

“…The spectrum depicts bands typically from TPE based on SEBS/PP/oil/calcite, such as the peaks at 2952 cm -1 , 1493 cm -1 , 757 cm -1 and 698 cm -1 that are common in aromatic compounds, the peaks at 2920 and 2852 cm -1 attributed to C-H vibrations. Also, bands were found at 1455 and 1377 cm -1 corresponding to methyl group and at 876 cm -1 which represents carbonyl group from CaCO 3 [23][24][25][26][27] . There were no differences in the FTIR-ATR profiles between aged and unaged compounds.…”

Nanotechnology to Improve the Performances of Hydrodynamic Surfaces

“…In other applications, such as textile [9], the embedment of ZnO NRs in the epoxy coat has improved anticorrosion and hydrophobic properties with a water contact angle (WCA) of 128 • [11]. An epoxy coat blended with ZnO nanorods has proven to provide very good corrosion resistance capacity [12][13][14][15]. The addition of ZnO nanoparticles (NPs) in epoxy paint improves the adhesion and the lifetime of the coat [14].…”

“…An epoxy coat blended with ZnO nanorods has proven to provide very good corrosion resistance capacity [12][13][14][15]. The addition of ZnO nanoparticles (NPs) in epoxy paint improves the adhesion and the lifetime of the coat [14]. In our study, we investigate the super-hydrophobicity of treated ZnO NRs and the dynamic gain in the sliding speed on an epoxy-painted maritime aluminum disc.…”