Comparison of barrier properties for a superhydrophobic epoxy coating under different simulated corrosion environments

Recent advances on organic coating system technologies for corrosion protection of offshore metallic structures

Advantage of super-hydrophobic surface as a barrier against atmospheric corrosion induced by salt deliquescence

A novel coating material that uses nano-sized SiO2 particles to intensify hydrophobicity and corrosion protection properties

Hybrid polymeric based nanocomposite coating systems (NCs) were fabricated by solution intercalation method with the use of epoxy (E) and polydimethylsiloxane (PDMS) as the host hybrid polymeric matrix and different weight ratio of SiO2 nanoparticles, ranging from 2 wt. % to 8 wt. %, as the reinforcing agents. The effects of introducing PDMS as a modifier to epoxy resin, as well as, the influence of embedding SiO2 nanoparticles within the developed matrix were evaluated via utilizing X-ray diffraction (XRD), contact angle measurements (CA), field emission scanning electron microscope (FESEM), and electrochemical impedance spectroscopy (EIS). XRD and FESEM results revealed the good dispersion of the nanoparticles within the polymeric matrix and confirmed the efficiency of the solution intercalation method. CA findings confirmed the achievement of hydrophobic surface after modifying epoxy resin with PDMS with CA value at 96° for epoxy-PDMS coating system (ES 0). Also CA results indicated the ability of SiO2 nanoparticles to participate in developing more hydrophobic surface as CA value up to 132° was achieved with utilizing 6 wt% SiO2 loading ratio. The results obtained from EIS studies revealed that the coating system with 2 wt% had the best anticorrosion performance and have demonstrated an intact behavior over all the immersion period without any sign of coating damage or degradation.

Studies on SiO 2 -hybrid polymeric nanocomposite coatings with superior corrosion protection and hydrophobicity

Polybenzoxazine/SiO2 nanocomposite coatings for corrosion protection of mild steel

Hydrophobic benzoxazine-cured epoxy coatings for corrosion protection

Organoclays modified by two different pillaring agents were introduced in polybenzoxazine (PBz) coatings on mild steel (MS). Both physicochemical properties and corrosion protection performance of composite coatings were fully investigated with the assistance of FTIR, XRD, AFM, SEM, and electrochemical measurements. The octadecyl quaternary ammonium-modified organoclays exhibited an exfoliated structure in polymer matrix, which benefited little in coatings’ barrier property. However, organoclays modified by dimethyl dioctadecyl quarternary ammonium induced an intercalated structure in composites, which greatly enhanced the corrosion resistance of poly(BA-aptms) with corrosion rate reduced by 3 and 4 orders of magnitude, respectively, compared to PBz and bare MS when 3 wt% of organoclays were added.

Yanfeng Zhang

Papers

Polybenzoxazine/SiO2 nanocomposite coatings for corrosion protection of mild steel

Hydrophobic benzoxazine-cured epoxy coatings for corrosion protection

Intercalated polybenzoxazine/organoclay composites with enhanced performance in corrosion resistance