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Effect of Concentration and Temperature on Carbon Steel Corrosion Inhibition


Methionine is investigated as a corrosion inhibitor for carbon steel in 1 M HCl solution using electrochemical impedance spectroscopy and weight loss techniques. The efficiency of the inhibitors increases with increase in the inhibitor concentration. Results obtained reveal that the used pyrimidine derivatives perform as corrosion inhibitors for steel in 1 M HCl. Double layer capacitance, C dl and charge transform resistance, R ct values were derived from Nyquist plots obtained from AC impedance studies. Changes in impedance parameters are indicative of the adsorption of these inhibitors on the iron surface. The inhibition efficiency mainly depends on the nature of the investigated compounds. The values of the inhibition efficiency calculated from the two techniques are in reasonably good agreement. The adsorption of these compounds on steel surface is found to obey Langmuir adsorption isotherm.

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Jafari, H., Akbarzade, K. Effect of Concentration and Temperature on Carbon Steel Corrosion Inhibition. J Bio Tribo Corros 3, 8 (2017).

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  • Corrosion inhibitors
  • Steel
  • Electrochemical impedance spectroscopy