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Current Analytical Chemistry

Author(s): Geetha Manoharan*, Rajesh Nithyanandam, Jenish Soosai Antony and Susai Rajendran

DOI: 10.2174/0115734110296231240501170801

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Investigating the Effects of Urea-Zinc Sulfate-L Phenylalanine on the Corrosion Inhibition of Mild Steel Exposed to pH-4 Sulfuric Acid

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Abstract

Background: Corrosion of mild steel is a risk to material and stability. The practice of corrosion inhibitors is a cost-effective corrosion modification method for mild steel. Organic inhibitors rich in electrons might have an excellent ability to prevent corrosion. This study aims to assess the inhibitory effect of the mixture of Urea, Zinc Sulfate, and L-Phenylalanine, which has a high electron density.

Methods: MS corrosion was experimentally analyzed by dipping in H2SO4 solution at a pH – 4 for 24 hrs. Different gravimetric and conventional techniques, such as polarization, AC impedance AFM, UV, and fluorescence, were used to examine the corrosion rate.

Results: According to gravimetric measurements, this combination produced 93% effective inhibition. The findings of the impedance test proved that the mixture of inhibitors that was adsorbed on the metal surface effectively prevented corrosion.

Conclusion: Likewise, according to the Polarization measurements, the inhibitor exhibits mixed-type performance with significant cathodic activity. UV, Fluorescence, and AFM findings showed that MS corrosion was suppressed because the inhibitor molecule adhered to the metal's surface and reduced.

Keywords: Corrosion, Inhibition Efficiency, Synergetic Effect, Mild Steel, Urea, L-Phenylalanine, AFM.

Graphical Abstract

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