Novel green plants extract as corrosion inhibiting coating for steel embedded in concrete

Purpose This paper aims to evaluate the ability of Aubepine and Molokhia extract, obtained by cathodic electrochemical treatment (CET), to protect steel rebar against attack by chloride ions in environment of reinforced concrete marine structures. The effect of Aubepine and Molokhia extract was inve...

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Bibliographic Details
Published in:Pigment & resin technology 2020-10, Vol.49 (6), p.501-514
Main Authors: ElShami, Ahmed A, Bonnet, Stéphanie, Makhlouf, Mohamed Hussein, Khelidj, A, Leklou, N
Format: Article
Language:English
Subjects:
Carbon steel
Carbon steels
Cathodic protection
Chloride
Chloride ions
Concrete
Corrosion
Corrosion inhibitors
Electrochemical impedance spectroscopy
Electrode polarization
Electrodes
Flavonoids
Herbal medicine
Investigations
Leaves
Medicinal herbs
Rebar
Reinforced concrete
Reinforcing steels
Spectrum analysis
Thin film coatings
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Summary:Purpose This paper aims to evaluate the ability of Aubepine and Molokhia extract, obtained by cathodic electrochemical treatment (CET), to protect steel rebar against attack by chloride ions in environment of reinforced concrete marine structures. The effect of Aubepine and Molokhia extract was investigated by electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization techniques. Design/methodology/approach This experimental work has achieved particularity to compare the behaviour of two types of treatment (carbon steel treated one time by Aubepine extract and one time by Molokhia extract) submitted to the presence and absence of chloride ions. Findings The results obtained show that the extract solution of the plant could serve as an effective inhibitor for the corrosion of steel. Inhibition was found to increase with increasing concentration of Molokhia extract and for Aubepine extract maximum concentration is 1 g/L. Research limitations/implications Plant extracts and traditional medicinal herbs have become important as an environmentally acceptable, readily available and renewable source for wide range of inhibitors. Originality/value Aubepine and Molokhia extract are novel green plants extract as corrosion inhibiting coating for steel embedded in concrete. Aubepine is a genus of trees in the family Rosaceae and Molokhia is the leaves of Corchorus olitorius. Flavonoids content was found in both of Aubepine and Molokhia extract as green inhibitors for corrosion of metals.
ISSN:0369-9420
1758-6941
DOI:10.1108/PRT-09-2019-0078