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Cationic surfactant as corrosion inhibitor for aluminum in acidic and basic solutions

N.A.F. Al‐Rawashdeh (Chemistry Department, Jordan University of Science & Technology, Irbid, Jordan)
A.K. Maayta (Chemistry Department, Jordan University of Science & Technology, Irbid, Jordan)

Anti-Corrosion Methods and Materials

ISSN: 0003-5599

Article publication date: 1 June 2005

1145

Abstract

Purpose

To investigate the inhibiting effect of the cationic surfactant cetyl trimethylammonium chloride (CTAC) on aluminum (Al).

Design/methodology/approach

Pure aluminum rods were immersed in hydrochloric acid (HCl) and sodium hydroxide (NaOH) solutions for weight‐loss tests and potentiostatic polarization measurements.

Findings

The inhibition action depends on the concentration of the inhibitor, the concentration of the corrosive media, and the temperature. The inhibition efficiency in NaOH was higher than that in HCl solutions. In both acidic and basic media, the increase in temperature resulted in a decrease of the inhibition efficiency and a decrease in the degree of surface coverage. The results were indicative of increased aluminum dissolution with increasing temperature. It was found that adsorption of CTAC on the aluminum surface follows Temkin's isotherm in HCl and Langmuir's isotherm in NaOH.

Originality/value

Clarifies the effects of concentration and temperature on the inhibition efficiency of a cationic surfactant on aluminum.

Keywords

Citation

Al‐Rawashdeh, N.A.F. and Maayta, A.K. (2005), "Cationic surfactant as corrosion inhibitor for aluminum in acidic and basic solutions", Anti-Corrosion Methods and Materials, Vol. 52 No. 3, pp. 160-166. https://doi.org/10.1108/00035590510595157

Publisher

:

Emerald Group Publishing Limited

Copyright © 2005, Emerald Group Publishing Limited

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