Singhbabu, Y N and Sivakumar, B and Singh, J K and Bapari, H and Pramanick, A K and Sahu, Ranjan K (2015) Efficient anti-corrosive coating of cold-rolled steel in a seawater environment using an oil-based graphene oxide ink†. Nanoscale, 7 (6.739). pp. 8035-8047.
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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.
|Uncontrolled Keywords:||oil-based cold-rolled anti-corrosive steelseawater|
|Divisions:||Material Science and Technology|
|Deposited By:||Sahu A K|
|Deposited On:||01 May 2015 13:25|
|Last Modified:||01 May 2015 13:25|
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