Abstract:
This paper deals with the corrosion inhibition effect of Papaya peel extract (PPE) on
Aluminium alloy (AA) in 1 M HCl. The corrosion tests were performed by using electrochemical
impedance spectroscopy (EIS) and potentiodynamic polarization techniques (PDP). Maximum
inhibition efficiency observed is 95.5% and 98.1% from EIS plot and PDP studies at higher concentration (2.0 g L 1
) of PPE. Potentiodynamic polarization result shows mainly the cathodic type
inhibition for PPE. Surface morphology of AA is carried by scanning electron microscopy
(SEM) and atomic force microscopy (AFM). Quantum chemical study is complemented well with
the experimental findings of the corrosion inhibition.
2016 Ain Shams University. Production and hosting by Elsevier B.V. This is an open access article under
the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
