Electrochemical impedance spectroscopy evaluation on the protective properties of epoxy/DBSAdoped polyaniline-TiO 2 nanocomposite coated mild steel under cathodic polarization

Anti-corrosive and oil sensitive coatings based on epoxy/polyaniline/magnetite-clay composites through diazonium interfacial chemistry

“…On the other hand, Hosseini et al . 81 attributed the corrosion protection of their nanocomposite coating (EP/DBSA doped PANI-TiO 2 ) to the titania nanoparticles as an inert material in addition to the produced Fe 2 O 3 at the coating/metal interface that fills the pores of the coating matrix which hindered the attack of the corrosive ions. In addition to the aforementioned reasons for the corrosion resistance of PANI, it is observed that the filler used in this study decreases the hydrophilicity of the as-prepared coatings up to a maximum amount of filler, after which the hydrophilicity increases again which lowers the corrosion resistance.…”

“…The corrosion protection of the magnetite polymer can be attributed to that filler which decreases the porosity of the nanocomposite coating and therefore decreases the diffusion of the chloride ions inside along with the corrosion products out of the coating 82 . However, a further increase in the concentration of the magnetite nanoparticles (>3 wt.%), leads to a noticeable decrease in the corrosion protection of C-steel, which could be attributed to the agglomeration of the magnetite nanoparticles particles 83 , that leaves defects (such as pinholes or pores) in the coating matrix and increases the diffusion of the aggressive ions through the coating 81 . The agglomeration is produced by both van der Waals forces and electrostatic attraction of the charges that exist on the magnetite nanoparticles surface 84 .…”

Preparation of PANI–CuZnO ternary nanocomposite and investigation of its effects on polyurethane coatings antibacterial, antistatic, and mechanical properties

“…The peaks around 1304 cm −1 and 3500 cm −1 are respectively related to bending vibrations of C-N and N-H. In addition, the peak at 1100 cm −1 could be originated from quinoid units of PANI chains [29]. The FTIR spectrum of PANI-CuZnO ternary nanocomposite is shown in curve b.…”

Synergistic effect of polybenzoxazine/ZrO2encapsulated polyurethane nanocomposite coatings for enhanced barrier properties of steel in seawater

“…The resistance toward defects/cracks can be enhanced by the incorporation of nanoparticles into the polymer coatings. The anti-corrosion properties can be enhanced by various modifications (Lyon et al , 2017; Xavier, 2019; Dalmoro et al , 2013; Joseph Raj, 2019; Yuan et al , 2016; Jeen Robert et al , 2019; Xavier, 2020; Wang et al , 2019; Rashvand and Ranjbar, 2013; Xiao et al , 2016; Boonyapookana et al , 2011; Bakshi et al , 2020; Hosseini and Sefidi, 2017; Ghanbari and Attar, 2015; Caldona et al , 2017; Takeichi et al , 2005). Benzoxazine resins can be used as an alternative to epoxy, phenolic and bismaleimide resins.…”