A Comparative Study on The Corrosion Behavior of Mild Steel and Aluminum Alloy in Acidic Medium Using Green Corrosion Inhibitor

Year 2019, Volume: 14 Issue: 3, 19 - 31, 08.07.2019

Asmae Berrıssoul , Ali Dafalı Karima Cherrak Abderahman Romane Aicha Ouarhach Abdellah Guenbour Abdelkader Zarrouk

Abstract

     Many industries worldwide use steel and aluminum as the principal
raw    material. In one hand, thanks to
its lightweight and durability, aluminum is widely used in all sectors of the
transportation industry-land, sea, and air. In the other hand, production
process of steel equipment’s is generally less expensive than others and its
recyclability can be infinite. For this reason, it is one of the most used
metals. After the production process, the finished metallic product needs a pickling
process using aggressive acids such as hydrochloric acid. Consequently,
aluminum and steel products are exposed to the corrosion phenomenon. For this
reason, the present work investigates the anticorrosion effect of Lavandula
maroccana ethanol extract on both aluminum and mild steel corrosion in 1M
HCl solution. In fact, plant extracts inhibitors are replacing synthesized
compounds that are usually environmentally toxic. Electrochemical measurements
are the main data used to analyze the inhibition effect of LM inhibitor using
the potentiostat device (PGZ100). Electrochemical impedance spectroscopy
technique (EIS) showed an increase in the charge transfer resistance of mild
steel specimen. The high inhibition efficiency is 89% for mild steel in 1M HCl
using 400ppm of LM extract. For aluminum alloy used in this study, the high
inhibition efficiency reached 68%. Scanning electron microscopy (SEM) and UV-visible
surface analysis were also applied to investigate the effect of LM extract
inhibitor on aluminum alloy and mild steel specimen. 

Keywords

Corrosion, Mild Steel, Hydrochloric Acid, Potentiostat (PGZ100), EIS

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