Encapsulation of Acacia bark extract (Acacia mangium) by maltodextrin-carrageenan for corrosion inhibition steel in sulfuric acid medium

Gusti, Diah Riski; Pardede, Sri Nurmaria; Tarigan, Indra Lasmana; M, Damris; Harizon, Harizon

doi:10.21608/ejchem.2024.230477.8462

Encapsulation of Acacia bark extract (Acacia mangium) by maltodextrin-carrageenan for corrosion inhibition steel in sulfuric acid medium

Document Type : Original Article

Authors

¹ Chemistry Departement, Faculty of Science and Technology, Universitas Jambi, Indonesia

² Chemistry Departement, Faculty of Science and Teknologi, Universitas Jambi

³ Chemistry Department, Faculty of Science dan Technology, Universitas Jambi

10.21608/ejchem.2024.230477.8462

Abstract

Abstract
Research shows that encapsulation of acacia bark extract with maltodextrin-carrageenan (1:1) effectively inhibits mild steel corrosion in a 0.75 M sulfuric acid solution. To study the inhibition efficiency and adsorption properties using the weight loss method with varying concentrations starting from 0.5 g/L to 2.5 g/L and temperature variations from 303 K to 333 K. The results showed that a higher encapsulation concentration of acacia bark extract caused a lower corrosion rate and higher inhibition efficiency. Adsorption of inhibitors on the mild steel surface follows the Freundlich isotherm. Thermodynamic adsorption parameters show that adsorption occurs spontaneously with increasing temperature. The encapsulation adsorption process of acacia bark extract on the surface of mild steel is exothermic and shows the irregularity of the adsorption process on the steel surface

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