Journal
CORROSION SCIENCE
Volume 53, Issue 2, Pages 664-670Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2010.10.013
Keywords
Steel; EIS; Polarization; SEM; Acid inhibition
Funding
- Educational Department of Yunnan Province [09C0181]
- Key Construction Course of Chemical University [XKX200907]
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The inhibition effect of benzyltrimethylammonium iodide (BTAI) on the corrosion of cold rolled steel (CRS) in phosphoric acid produced by dihydrate wet method process (7.0 M H(3)PO(4)) solution was investigated for the first time by weight loss, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and scanning electron microscopy (SEM) methods. The results show that BTAI is a good inhibitor, and the adsorption of BTAI obeys Langmuir adsorption isotherm. Polarization curves show that BTAI behaves as a mixed-type inhibitor. EIS spectra exhibit one capacitive loop and confirm the inhibitive ability. The inhibition action of BTAI is also evidenced by SEM images. (C) 2010 Elsevier Ltd. All rights reserved.
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