Electrochemical And Weight Loss Studies Of Extract From Mint As Green Corrosion Inhibitor For Carbon Steel In H2SO4 Solution

DOI

10.2991/meita-15.2015.43How to use a DOI?

Keywords

carbon steel; mint leaves; corrosion inhibitor; electrochemistry; polarization curve; SEM

Abstract

The inhibitive action of extract from mint leaves (EML) on Q235A hot rolled carbon steel (HRCS) in 0.5mol/L H2SO4 solution was studied using weight loss measurement, electrochemical polarization and scanning electron microscope (SEM) characterization. The results indicate that the extract functions as a good inhibitor. The inhibition efficiency of EML increases with rise in temperature and concentration. The max value of inhibition efficiency reaches 94.01% with addition of 320mg/L EML inhibitor in 0.5mol/L H2SO4 solution, at 50 oC. Chemical adsorption of EML components occurs on the surface of carbon steel according to the thermodynamic theoretic analysis. It is shown that the extract of mint leaves acts as a mixed type inhibitor according to the analysis from electrochemical polarization curves. The adsorption of the extract on hot rolled carbon steel obeys Langmuir’s adsorption isotherm.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Xiaorong Zhou
AU  - Wenfeng Wang
AU  - Jianfen Li
AU  - Hui Fei
AU  - Guangsen Song
PY  - 2015/08
DA  - 2015/08
TI  - Electrochemical And Weight Loss Studies Of Extract From Mint As Green Corrosion Inhibitor For Carbon Steel In H2SO4 Solution
BT  - Proceedings of the 2015 International Conference on Materials Engineering and Information Technology Applications
PB  - Atlantis Press
SP  - 227
EP  - 232
SN  - 2352-5401
UR  - https://doi.org/10.2991/meita-15.2015.43
DO  - 10.2991/meita-15.2015.43
ID  - Zhou2015/08
ER  -