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The synergistic effect of 4-methyl-norvalin and 2-methoxy-4-formylphenol on the corrosion inhibition of low carbon steel in artificial seawater (3.5 wt.% NaCl solution) was studied with potentiodynamic polarization technique, open circuit potential measurement and optical microscopic analysis. Results obtained from the electrochemical test showed the organic derivatives performed effectively with optimal inhibition performance of 89%. Mixed type inhibition behavior was observed. Anodic corrosion potential shift occurred because of effective surface coverage of the inhibitor molecules. The adsorption mode was determined to occur through physisorption reaction from thermodynamic calculations in agreement with the Langmuir, Frumkin and Freundlich isotherms at correlation coefficients beyond 0.7. Corroded morphology of steel occurred without with inhibitor compared to the steel from solution at highest inhibitor concentration.

iop conference series. materials science and engineering

Effect of the combined admixture of 4-methyl-norvalin and 2-Methoxy-4-formylphenol on the corrosion inhibition of low carbon steel in artificial seawater solution