Corrosion inhibition property of polyester-groundnut shell biodegradable composite

Area of Science:

• Materials Science
• Corrosion Science
• Polymer Chemistry

Background:

• Natural fibers offer environmental benefits in composite materials.
• Groundnut shell (GNS) waste can be utilized in polymer composites.
• Corrosion inhibition is crucial for material longevity.

Purpose of the Study:

• To investigate the corrosion inhibition properties of a polyester-groundnut shell composite (PEGNS).
• To evaluate the effectiveness of PEGNS as a corrosion inhibitor for mild steel in 1M H2SO4.
• To understand the mechanism of corrosion inhibition by PEGNS.

Main Methods:

• Polyester (PE) synthesis via condensation polymerization.
• PEGNS composite preparation using ultrasonication.
• Material characterization using FT-IR, TGA, and XRD.
• Corrosion inhibition evaluation via gravimetric, electrochemical (EIS, polarization), AAS, and SEM methods.

Main Results:

• PEGNS demonstrated significant corrosion inhibition for mild steel in 1M H2SO4.
• Inhibition efficiency increased with PEGNS concentration and decreased with temperature.
• Adsorption followed the Langmuir isotherm, indicating protective film formation.
• Electrochemical parameters confirmed PEGNS adsorption on the mild steel surface.

Conclusions:

• PEGNS is an effective, eco-friendly corrosion inhibitor for mild steel.
• The composite functions by adsorbing onto the metal surface, forming a protective layer.
• This research highlights the potential of waste materials in developing functional composites.