Electrochemical Behavior of Carbon Steel in Acidic Medium Containing Cationic Inhibitor

Abstract:

Electrochemical behavior of carbon steel in 1 M acetic acid (CH₃COOH) containing tetramethyl ammonium bromide (TMB) as the cationic inhibitor was investigated by potentiodynamic polarization technique and electrochemical impedance spectroscopy (EIS). The aim of this study is to evaluate the inhibition efficiency of cationic inhibitor for carbon steel corrosion. The electrochemical analysis revealed that inhibition efficiency significantly increased with the increasing of inhibitor concentration. Polarization study indicated that TMB acted as a mixed type inhibitor, which inhibited both cathodic and anodic reactions. The changes of impedance parameters by different inhibitor concentration showed a better protection due to formation of a thin film onto the steel surface. This study suggests that TMB is able to inhibit corrosion process of carbon steel in acidic medium with significant inhibition efficiency.

• Periodical: Advanced Materials Research (Volume 1107)
• Pages: 211-216
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1107.211
• Online since: June 2015
• Authors: Mohd Nazri Idris, Abdul Razak Daud, Norinsan Kamil Othman
• Keywords: Carbon Steel, Corrosion Inhibitor, Impedance, Inhibition Efficiency, Polarization

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