title: 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.
authors: Academic of Scientific and Innovative Research (AcSIR), New Delhi, India.
authors: Y N
authors: YN
authors: Singhbabu
authors: B
authors: B
authors: Sivakumar
authors: J K
authors: JK
authors: Singh
authors: H
authors: H
authors: Bapari
authors: A K
authors: AK
authors: Pramanick
authors: Ranjan K
authors: RK
authors: Sahu