Efficient anti-corrosive coating of cold-rolled steel in a seawater environment using an oil-based graphene oxide ink

Abstract

We report the production of an efficient anti-corrosive coating of cold-rolled (CR) steel in a seawater environment (∼3.5 wt% NaCl aqueous solution) using an oil-based graphene oxide ink. The graphene oxide was produced by heating Aeschynomene aspera plant as a carbon source at 1600 °C in an argon atmosphere. The ink was prepared by cup-milling the mixture of graphene oxide and sunflower oil for 10 min. The coating of ink on the CR steel was made using the dip-coating method, followed by curing at 350 °C for 10 min in air atmosphere. The results of the potentiodynamic polarization show that the corrosion rate of bare CR steel decreases nearly 10,000-fold by the ink coating. Furthermore, the salt spray test results show that the red rusting in the ink-coated CR steel is initiated after 100 h, in contrast to 24 h and 6 h in the case of oil-coated and bare CR steel, respectively. The significant decrease in the corrosion rate by the ink-coating is discussed based on the impermeability of graphene oxide to the corrosive ions.

Preparation, characterization, and properties of graphene oxide/urushiol-formaldehyde polymer composite coating

“…According to the results, when GO (1.0 wt%) was used as a chemically modified additive to UFP, the coated samples of GO/UFP displayed higher positive corrosion potentials (E c , À 460.51 mV) and lower corrosion current densities (i c , 9.64 9 10 À9 A/cm 2 ), indicating that the addition of GO significantly improved the anticorrosion resistance of the UFP coatings. 39 Moreover, the MGO/UFP (GO, 1.5 wt%) sample displayed the lowest i c value (2.4 9 10 À9 A/cm 2 ), suggesting that it could be provided with the highest corrosion resistance compared with other samples (GO content from 0.5 to 2.0 wt%). However, the corrosion rate of the MGO/UFP composite coatings (from 2.93 9 10 À5 to 8.59 9 10 À3 mm/ a) was significantly changed in the reduction of i corr accompanied with more positive E corr via including MGO suspension.…”

Functionalization of Silica with Triazine Hydrazide to Improve Corrosion Protection and Interfacial Adhesion Properties of Epoxy Coating and Steel Substrate

“…Accordingly, the chemical reaction of amine groups of triazine dihydrazide with epoxy/polyamine matrix and their chelation with the steel surfaces led to higher barrier properties of epoxy coatings in the case of STHa and STHc [48]. Moreover, both STHa and STHc epoxy composites had stronger adhesion strengths (Table 1) and provided high corrosion protection performance [49][50][51][52]. The lower dispersion of STHa in epoxy/polyamine hardener than that of STHc led to formation of cracks and defects that decreased the corrosion resistance of epoxy composites, due to agglomeration and hydrogen bonding of STHa with more triazine dihydrazide groups [53].…”

Ångström-Scale, Atomically Thin 2D Materials for Corrosion Mitigation and Passivation

“…For example, a composite thin film (≤200 nm) consisting stainless steel/rGO nanoplatelets and alternating nanolayers of two different ceramic materials (i.e., alumina and titania) have exhibited lower porosity compared to neat alumina/titania, thus higher corrosion passivation of the underlying steel [44]. This type of barrier can also be fabricated using graphene flakes or an ink coating consisting of GO and oil [45,46]. Moreover, petroleum production well exhibits a severe issue of microbially induced corrosion (MIC) [43].…”