Inhibition of copper corrosion in acidic chloride solution by methionine combined with cetrimonium bromide/cetylpyridinium bromide

Methionine (MET) is non-toxic and easily biodegradable so that it is an alternative corrosion inhibitor in the water treatment and industrial pickling process. In this article, the inhibition behavior of MET combined with cetrimonium bromide (CTAB) and cetylpyridinium bromide (CPB) for copper corros...

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Bibliographic Details
Published in:Journal of applied electrochemistry 2011-05, Vol.41 (5), p.491-498
Main Authors: Zhang, Da-Quan, Xie, Bin, Gao, Li-Xin, Joo, Hyung Goun, Lee, Kang Yong
Format: Article
Language:English
Subjects:
ACIDS
BROMIDES
CATHODES
Chemistry
Chemistry and Materials Science
Copper
CORROSION
CORROSION INHIBITORS
Electrochemical impedance spectroscopy
Electrochemistry
Industrial Chemistry/Chemical Engineering
Inhibition
Methionine
Original Paper
Physical Chemistry
Quantum chemistry
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Summary:Methionine (MET) is non-toxic and easily biodegradable so that it is an alternative corrosion inhibitor in the water treatment and industrial pickling process. In this article, the inhibition behavior of MET combined with cetrimonium bromide (CTAB) and cetylpyridinium bromide (CPB) for copper corrosion in 0.5 M HCl solution has been investigated by using the electrochemical impedance spectroscopy (EIS), cyclic voltammetry, and polarization curve methods. It shows that combination of MET with CTAB or CPB improves the inhibition performance effectively, and produces strong synergistic inhibition effect. The combined inhibitors suppress cathodic reaction and shift the corrosion potential toward more negative values. The mixed CTAB/MET has a better synergistic effect compared with the mixed CPB/MET. The quantum chemical parameters were calculated by PM3 semi-empirical quantum method. The better synergistic inhibition between MET and CTAB is attributed to their stronger electrostatic interaction.
ISSN:0021-891X
1572-8838
DOI:10.1007/s10800-011-0259-2