A comparative study of leaves extracts for corrosion inhibition effect on aluminium alloy in alkaline medium
By Namrata Chaubey and Dileep Kumar Yadav and Vinod Kumar Singh and M.A. Quraishi
Published in Ain Shams Engineering Journal
NULL
2015
Abstract
This paper deals with the comparative inhibition study of some plants leaves extract namely Cannabis sativa (CS), Rauwolfia serpentina (RS), Cymbopogon citratus (CC), Annona squamosa (AS) and Adhatoda vasica (AV) on the corrosion of aluminium alloy (AA) in 1 M NaOH. The corrosion tests were performance by using gravimetric, electrochemical impedance spectroscopy (EIS), potentiodynamic polarization and linear polarization resistance (LPR) techniques. \RS\ showed maximum inhibition efficiency (?%), 97% at 0.2 g L?1. Potentiodynamic polarization curves justified that all the inhibitors are mixed-type. Surface morphology of \AA\ is carried by scanning electron microscopy (SEM) and atomic force microscopy (AFM).
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