Effect of Organic Corrosion Inhibitors on the Corrosion Performance of 1018 Carbon Steel in 3% NaCl Solution

The corrosion inhibition of 1018 carbon steel in 3% NaCl solution at 50°C with imidazoline-based inhibitors has been evaluated by using electrochemical techniques. Techniques included polarization curves, open circuit potential, linear polarization resistance and electrochemical impedance measurements. The results showed a low performance of the inhibitors. However, it was observed that inhibitors either can be adsorbed on the substrate surface or modify the solution resistivity and thereby enhanced the corrosion performance.