Evaluation of Adsorption Inhibitory of Cocoa Husk Extract for Defense Toward Corrosion on Steel Surfaces

DOI

10.2991/978-94-6463-926-1_79How to use a DOI?

Keywords

Adsorption; Cacao Skin; Corrosion; Inhibition; Surface

Abstract

Studies have been conducted to investigate the usage of cocoa pod extract inhibitors derived from biomass waste to reduce the pace of steel corrosion. For 24, 72, 120, and 168 h at first, the steel was pre-soaked in the inhibitor. After that, the immersion in corrosive HCl medium was carried out with time variations of 48, 96, and 144 h. The weight loss method, optical microscopy, scanning electron microscopy (SEM), and atomic force microscopy (AFM) were all used to determine corrosion rates. Diffraction of X-Ray (XRD) phase analysis and Density Functional Theory (DFT) were used to analyze the HOMO/LUMO contours, geometry, and form of the molecular structure. As a consequence, the weight loss technique produces the greatest results, with a corrosion rate of 0.2972 mg.cm2/hour and an inhibition efficiency of 74.71% when steel is soaked in inhibitor for 168 h and then in HCl for 48 h. The surface grew flatter and had fewer cracks as it was immersed in the inhibitor for longer periods, according to optical microscopy and SEM morphological inspection. Four different tops representing the crystalline Fe and C phases were produced as a result of the response between the surface of steel and inhibitor, according to data of XRD. AFM examination revealed a strong correlation between the length of time the specimen was soaked in inhibitor and quantity of adsorption that developed on the surface. Based on the DFT method analysis, a molecule's ability to prevent corrosion increases with its EHOMO because it makes it easier for the molecule to transfer electrons. The cocoa pod extract inhibitor has a reasonably high inhibition efficiency of 80.21% as a consequence of optimization and computation of tannin components reacting with the steel surface.

Copyright

© 2025 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Yuli Yetri
AU  - Dahyunir Dahlan
AU  - Apriska Prameswari
AU  - Wan Mohd Norsani
AU  - Muh Anhar
AU  - SP Irianto
PY  - 2025
DA  - 2025/12/31
TI  - Evaluation of Adsorption Inhibitory of Cocoa Husk Extract for Defense Toward Corrosion on Steel Surfaces
BT  - Proceedings of the International Conference on Applied Science and Technology on Engineering Science 2025 (iCAST-ES 2025)
PB  - Atlantis Press
SP  - 705
EP  - 715
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-926-1_79
DO  - 10.2991/978-94-6463-926-1_79
ID  - Yetri2025
ER  -