EFFECT OF 5-NITRO-2-FURALDEHYDE ON CORROSION OF CARBON STEEL

Abstract

Evaluation of corrosion inhibitors for carbon steel in chlorinated environments is very important for some industrial plants. For this purpose, the inhibitory effect of 5-nitro-2-furaldehyde on the corrosion of carbon steel in aqueous solution of 0.1 M NaCl and 0.1 M HCl was investigated. Cyclic voltagrams were taken to determine the electrochemical behavior of carbon steel in non-inhibitory and inhibitory environments. The corrosion rates of carbon steel in the presence of 5-nitro-2-furaldehyde in different concentrations (10, 20, 50 and 100 ppm) were measured by the Tafel Polarization method. As the inhibitor concentration increased, no significant change was detected in the 0.1 M HCl medium. In the 0.1 M NaCl environment, the corrosion potential has shifted to values that are more positive and the corrosion current has been reduced. This indicates that the inhibitors form a film on the surface of metal in this environment and create resistance to corrosion. The best inhibitory activity was achieved with an inhibitor concentration of 100 ppm in 0.1 M NaCl medium.

Keywords

• Corrosion,Inhibitor,Tafel Polarization

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