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

N. A.F. Al-Rawashdeh, A. K. Maayta

Research output: Contribution to journalArticlepeer-review

33 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)160-166
Number of pages7
JournalAnti-Corrosion Methods and Materials
Volume52
Issue number3
DOIs
Publication statusPublished - Jul 11 2005

Keywords

  • Corrosion inhibitors
  • Non-ferrous metals
  • Surfactants

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Materials Science(all)

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