期刊
CORROSION SCIENCE
卷 53, 期 8, 页码 2651-2659出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2011.05.004
关键词
Acid solutions; Steel; EIS; Polarization; Weight loss; Acid inhibition
资金
- Department of Science and Technology, New Delhi, Govt. of India [DST] [100/IFD/1924/2008-2009]
- University Grants Commission, New Delhi
The corrosion inhibition effect of 2-[4-(methylthio) phenyl] acetohydrazide (HYD), 2-{[4-(methylthio) phenyl] acetyl} hydrazinecarbothioamide (TAD) and 5-[4-(methylthio) benzyl]-4H-1,2,4-triazole-3-thiol (TRD) on steel in 1.0 M HCl was investigated by mass loss and electrochemical methods. The effect of concentration, temperature and immersion time was studied. The results indicated that the compounds are efficient, mixed type and pursue Flory-Huggins adsorption isotherm. The inhibition efficiency at lower concentration of inhibitor decreased with temperature while at higher concentration, it is retained and the calculated free energy attributes this to comprehensive adsorption. The efficiency stands in the order TRD > TAD > HYD and is confirmed by the Quantum studies. (C) 2011 Elsevier Ltd. All rights reserved.
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