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Inhibition effects of acetyl coumarines and thiazole derivatives on corrosion of zinc in acidic medium
A V Shanbhag T V Venkatesha R A Prabhu B M Praveen
Volume 34 Issue 3 June 2011 pp 571-576
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https://www.ias.ac.in/article/fulltext/boms/034/03/0571-0576 -
Keywords
Acetyl coumarines ;adsorption isotherm ;corrosion inhibition ;impedance ;zinc. -
Abstract
The corrosion inhibition characteristics of acetyl coumarine (AC), bromo acetyl coumarine (BAC) and thiazole derivatives (BTMQ and BTCQ) on the corrosion of zinc in 0.1 M HCl solution were investigated by weight loss, potentiodynamic polarization and impedance techniques. The inhibition efficiency increased with increase in inhibitor concentration upto 5 × 10-4 M, then gave almost same inhibition efficiency. The polarizationmeasurements indicated the mixed nature of inhibitors. The adsorption of compounds obeyed Langmuir’s adsorption isotherm. The thermodynamic functions for adsorption processes were evaluated.
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Author Affiliations
A V Shanbhag1 T V Venkatesha2 R A Prabhu3 B M Praveen2
- Department of Chemistry, S.D.M. College, Honavar 581 334, India
- Department of P.G. Studies and Research in Chemistry, Kuvempu University, Shankarghatta 577 451, India
- Department of Chemistry, M.G.C. College, Siddapur 581 355, India
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Dates
- Published
- June 2011
- Manuscript received
- 11 January 2008
- Manuscript revised
- 7 February 2011
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