Some natural aqueous extracts of plants as green inhibitor for carbon steel corrosion in 0.5 M sulfuric acid

The inhibiting impact of natural aqueous extracts of some plants such as curcumin, parsley and cassia bark extracts for the corrosion of carbon steel (C-steel) in 0.5 M H 2 SO 4 solution was inspected utilizing some techniques such as galvanostatic and potentiodynamic anodic polarization and weight...

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Bibliographic Details
Published in:Green chemistry letters and reviews 2018-07, Vol.11 (3), p.189-196
Main Authors: Abdallah, M., Altass, Hatem M., AL Jahdaly, B. A., Salem, M. M.
Format: Article
Language:English
Subjects:
Adsorption
Anodic polarization
Bark
Carbon steel
Carbon steels
cassia bark extract
Corrosion
Corrosion inhibitors
Corrosion potential
Curcumin
curcumin extract
Flavors
parsley extract
Pitting (corrosion)
Pitting potential
Plant extracts
Steel
Sulfuric acid
Weight loss measurement
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Summary:The inhibiting impact of natural aqueous extracts of some plants such as curcumin, parsley and cassia bark extracts for the corrosion of carbon steel (C-steel) in 0.5 M H 2 SO 4 solution was inspected utilizing some techniques such as galvanostatic and potentiodynamic anodic polarization and weight loss measurements. Outcomes indicated that the percentage inhibition efficiency increases with increasing the concentration of the extract due to its horizontal adsorption on the C-steel surface. The process of adsorption is followed by the Temkin isotherm. These natural extracts acted as pitting corrosion inhibitors by shifting the pitting potential to more noble values. The sequence of inhibition efficiency of the natural extracts decreases in the following order: cassia bark extract > parsley extract > curcumin extract. This arrangement is related to the molecular size of the major components of the three natural extracts used.
ISSN:1751-8253
1751-7192
DOI:10.1080/17518253.2018.1458161