Resumo

MONIKA; SIDDIQUE, Wequar A.  e  DUBEY, Arwind. Inhibiting Effect of N-Cetyl N,N,N-Trimethyl Ammonium Bromide on Corrosion of Mild Steel in Acidic Medium. Port. Electrochim. Acta [online]. 2005, vol.23, n.4, pp.445-455. ISSN 0872-1904.

The inhibiting effect of N-cetyl N,N,N-trimethyl ammonium bromide (CTMAB) on the corrosion of mild steel in 1N H₂SO₄ solution has been studied by using techniques such as weight loss and electrochemical polarization, infrared (IR) and scanning electron microscopic (SEM) techniques. It is found that CTMAB is good inhibitor for corrosion of mild steel in 1N H₂SO₄. The maximum efficiency is about 96% for CTMAB at 10^-1M concentration. The polarization curves indicate that the compound is mixed type inhibitor. The adsorption of inhibitor on mild steel surface is found to obey Langmuir adsorption isotherm. The activation energy E_a in the absence and presence of inhibitor is obtained by measuring the temperature dependence of corrosion method. The mechanisms of adsorption of CTMAB on mild steel have been investigated by IR spectra and SEM.

Palavras-chave : corrosion; inhibition; N-cetyl N; N; N-trimethyl ammonium bromide (CTMAB); H₂SO₄.

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