Use of Salvia hispanica as an eco-friendly corrosion inhibitor for bronze in acid rain

Purpose The purpose of this research paper was to investigate the use of methanolic extract of Salvia hispanica (S. hispanica) as a green corrosion inhibitor for bronze in a simulated acid rain solution. Design/methodology/approach Extract of S. hispanica was used as a green corrosion inhibitor for...

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Bibliographic Details
Published in:Anti-corrosion methods and materials 2017-11, Vol.64 (6), p.654-663
Main Authors: Larios-Galvez, A.K, Porcayo-Calderon, J, Salinas-Bravo, V.M, Chacon-Nava, J.G, Gonzalez-Rodriguez, Jose Gonzalo, Martinez-Gomez, L
Format: Article
Language:English
Subjects:
Acid rain
Adsorption
Analytical methods
Atmospheric precipitations
Charge transfer
Copper
Corrosion
Corrosion inhibitors
Corrosion potential
Corrosion tests
Electrochemical impedance spectroscopy
Electrochemical noise
Electrochemistry
Electrodes
Electrolytes
Green chemistry
Inhibitors
Noise
Polarization
Rain
Salvia hispanica
Scanning electron microscopy
Scientific papers
Spectrum analysis
Standard deviation
Sulfur
Urban atmosphere
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Summary:Purpose The purpose of this research paper was to investigate the use of methanolic extract of Salvia hispanica (S. hispanica) as a green corrosion inhibitor for bronze in a simulated acid rain solution. Design/methodology/approach Extract of S. hispanica was used as a green corrosion inhibitor for bronze in simulated acid rain solution. Electrochemical techniques such as potentiodynamic polarization curves, electrochemical impedance spectroscopy and electrochemical noise were used. Parameters such as polarization, charge transfer and noise resistance (Rp, Rct and Rn, respectively) were calculated. Findings Results showed that the extract acts as a good, anodic type of inhibitor. The inhibitor efficiency increased with increasing its concentration up to 400 ppm, decreasing beyond this concentration. Efficiency also increased with an increase in the immersion time. The inhibition was due to the adsorption of components found in the S. hispanica extract following a Langmuir adsorption isotherm. Practical implications S. hispanica extract can be used as a corrosion inhibitor for bronze in acid rain solution. Originality/value This study provides new information on the inhibition features of S. hispanica under specific conditions. This eco-friendly inhibitor could find applications to protect bronze exposed to polluted urban atmospheres.
ISSN:0003-5599
1758-4221
DOI:10.1108/ACMM-02-2017-1760