Effect of Anions on the Corrosion Inhibition of Aluminum in HCl using Ethyl Trimethyl Ammonium Bromide as Cationic Inhibitor

The corrosion inhibition of aluminum in hydrochloric acid solution in the presence of ethyl trimethyl ammonium bromide (ETMAB) at temperature range of 30-50oC was studied using the weight loss and polarization techniques. The effect of addition of anions (I-, SCN-, Br-) is also reported. The inhibit...

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Published inInternational journal of electrochemical science Vol. 3; no. 5; pp. 644 - 655
Main Authors Elewady, G.Y., El-Said, I.A., Fouda, A.S.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.05.2008
Subjects
anions
Corrosion inhibition
ethyl trimethyl ammonium bromide
HCl
synergism
HCl
synergism
Corrosion inhibition
ethyl trimethyl ammonium bromide
anions
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Summary:The corrosion inhibition of aluminum in hydrochloric acid solution in the presence of ethyl trimethyl ammonium bromide (ETMAB) at temperature range of 30-50oC was studied using the weight loss and polarization techniques. The effect of addition of anions (I-, SCN-, Br-) is also reported. The inhibition efficiency (%IE) increased with increase in concentration of ETMAB. The addition of the anions increased the inhibition efficiency to a considerable extent. The inhibitive action of ETMAB was discussed on the bases of its adsorption on the metal surface, which follow Freundlish adsorption isotherm. The synergistic effect of ETMAB and anions was discussed. Galvanostatic polarization curves indicated that the inhibitor behaves as mixed-type inhibitor.
ISSN:1452-3981
1452-3981
DOI:10.1016/S1452-3981(23)15550-7