Publication: Tryptamine as a corrosion inhibitor of mild steel in hydrochloric acid solution
1
Issued Date
2010-01-01
Resource Type
ISSN
0010938X
Other identifier(s)
2-s2.0-74249109338
Rights
Mahidol University
Rights Holder(s)
SCOPUS
Bibliographic Citation
Corrosion Science. Vol.52, No.1 (2010), 30-36
Suggested Citation
Pongsak Lowmunkhong, Dusit Ungthararak, Pakawadee Sutthivaiyakit Tryptamine as a corrosion inhibitor of mild steel in hydrochloric acid solution. Corrosion Science. Vol.52, No.1 (2010), 30-36. doi:10.1016/j.corsci.2009.08.039 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/28906
Research Projects
Organizational Units
Authors
Journal Issue
Thesis
Title
Tryptamine as a corrosion inhibitor of mild steel in hydrochloric acid solution
Other Contributor(s)
Abstract
The inhibitor effect of tryptamine on the corrosion of mild steel in 0.5 M hydrochloric acid at 30 °C was investigated using linear polarization, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. The inhibition efficiency increases with an increase in concentration of tryptamine. At 500 ppm tryptamine the inhibition efficiency calculated by these techniques is around 97%. Cathodic and anodic polarization curves of mild steel in the presence of different concentrations of tryptamine at 30 °C reveal that it is a mixed type inhibitor. Tryptamine follows Langmuir adsorption with adsorption free energy of -35.07 kJ mol-1. © 2009 Elsevier Ltd. All rights reserved.