Статья

Derris Indica Leaves Extract as a Green Inhibitor for the Corrosion of Aluminium in Alkaline Medium

Neha K NambiarElectro-Materials Research Laboratory, Centre for Nanoscience and Technology, Pondicherry University, Puducherry-605014, IndiaD. BrindhaPG & Research Dept. of Chemistry, Periyar EVR College, Trichy -620023, IndiaParthipan PunniyakottiElectro-Materials Research Laboratory, Centre for Nanoscience and Technology, Pondicherry University, Puducherry-605014, IndiaB. R. VenkatramanPG & Research Dept. of Chemistry, Periyar EVR College, Trichy -620023, IndiaSubramania AngaiahElectro-Materials Research Laboratory, Centre for Nanoscience and Technology, Pondicherry University, Puducherry-605014, India

2021en

ABI

Аннотация

The corrosion inhibitive effect of Derris indica leaves extract (DILE) on aluminium in 1 M NaOH is investigated at different temperatures.For this purpose, weight loss studies and electrochemical methods including potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS) techniques are employed.Surface analysis of the treated and untreated aluminium coupons is done by using metallurgical microscopy.About 60.2% of maximum corrosion inhibition efficiency is attained with an optimum inhibitor concentration of 1.2 g/L.Both weight loss and electrochemical studies confirmed that DILE plays a crucial role in the formation of a protective layer over metal surfaces.Also, electrochemical measurements revealed that DILE behaves as a mixed type of corrosion inhibitor.The kinetic parameters and thermodynamic parameters are calculated using Arrhenius theory and transition state theory.Langmuir adsorption isotherm was found to be the best fit and physical adsorption mechanism was proposed.

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Идентификаторы

DOI: 10.30919/es8d540

Цитирования и источники

Цитирований: 2Использованных источников: 0

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