Inhibition of mild steel corrosion in sulfuric acid solution using collagen

Inhibition of mild steel corrosion in sulfuric acid solution using collagen Inhibitive effect of collagen on the acid corrosion of mild steel in 0.5 M H2SO4 solution was studied by electrochemical impedance spectroscopy and electrochemical frequency modulation. Collagen effectively inhibited the corrosion of mild steel with efficiency ranges from 88.9 to 96.5 % for collagen concentrations from 20 to 80 ppm. Adsorption isotherm study was performed using weight loss measurements where Langmuir and El-Awady models were applied on data to investigate the mode of adsorption. Corrosion inhibition was also tested at different temperatures to measure the thermodynamic parameters; ΔG°, ΔH°, ΔS° and E a. Inhibition is suggested to occur due to adsorption phenomenon and data obey the El-Awady model. Thermodynamic study reveals that adsorption is endothermic–physical process driven by entropic factors. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Research on Chemical Intermediates Springer Journals

Inhibition of mild steel corrosion in sulfuric acid solution using collagen

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Publisher
Springer Netherlands
Copyright
Copyright © 2014 by Springer Science+Business Media Dordrecht
Subject
Chemistry; Catalysis; Physical Chemistry; Inorganic Chemistry
ISSN
0922-6168
eISSN
1568-5675
D.O.I.
10.1007/s11164-014-1809-0
Publisher site
See Article on Publisher Site

Abstract

Inhibitive effect of collagen on the acid corrosion of mild steel in 0.5 M H2SO4 solution was studied by electrochemical impedance spectroscopy and electrochemical frequency modulation. Collagen effectively inhibited the corrosion of mild steel with efficiency ranges from 88.9 to 96.5 % for collagen concentrations from 20 to 80 ppm. Adsorption isotherm study was performed using weight loss measurements where Langmuir and El-Awady models were applied on data to investigate the mode of adsorption. Corrosion inhibition was also tested at different temperatures to measure the thermodynamic parameters; ΔG°, ΔH°, ΔS° and E a. Inhibition is suggested to occur due to adsorption phenomenon and data obey the El-Awady model. Thermodynamic study reveals that adsorption is endothermic–physical process driven by entropic factors.

Journal

Research on Chemical IntermediatesSpringer Journals

Published: Sep 25, 2014

References

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