Abstract
The corrosion inhibition of the Acacia catechu bark was tested on mild steel in a 0.5 M sulphuric acid solution using weight loss, Tafel and EIS. A. catechu showed its best corrosion resistance of 93.85% at a concentration of 600 mg/L. SEM and AFM were used to verify the formation of a protective layer on the surface of the mild steel. The adsorption phenomenon was verified using UV–Vis. spectroscopic technique while FT-IR confirmed the presence of different functional groups containing heteroatoms. The adsorption of the inhibitory molecules on the surface of the mild steel followed the Langmuir adsorption isotherm. Theoretical studies were carried out as a supplementary study. All the results obtained to assure that the bark extracts of A. catechu can create an effective blocking layer and control the corrosion process.
Published Version
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