ItemArticle

Corrosion inhibition of mild steel using eco-friendly porous nanocarbon derived from waste mango kernels: a step towards sustainability

Title
Corrosion inhibition of mild steel using eco-friendly porous nanocarbon derived from waste mango kernels: a step towards sustainability
Creator
Murari, Anvitha; A, Arathi; Sirimahachai, Uraiwan; Rao, Srilatha; Hegde, Gurumurthy
Description
The pervasive corrosion of mild steel in acidic media poses a significant challenge in various industrial applications. While existing synthetic corrosion inhibitors are effective, their high cost and environmental toxicity necessitate the development of more sustainable alternatives. In this study, we present a novel approach to corrosion mitigation employing a porous nanocarbon synthesized from mango kernels, a sustainable source of agricultural waste. The CNS inhibitor was synthesized via pyrolysis at 800 C, yielding a high surface area (1090.2 m2 g?1) as confirmed by BET analysis. FE-SEM revealed a well-developed spherical morphology with an average particle size of 6070 nm. The corrosion inhibition efficiency of CNS was evaluated for mild steel in 1 M HCl using a combination of electrochemical techniques, including open circuit potential, potentiodynamic polarization (PDP), and electrochemical impedance spectroscopy. The CNS derived from waste mango kernels, exhibited excellent inhibition performance, achieving an efficiency of up to 87.1% at 800 ppm. PDP results revealed a mixed-type inhibition mechanism with suppression in both anodic and cathodic reactions. The thermodynamic parameter, adsorption free energy () of about ?20.0 kJ mol?1, indicates a spontaneous process and predominantly physical adsorption. Adsorption behavior was consistent with the Langmuir isotherm model. Surface analyses using SEM, EDS, optical profilometry, and water contact angle measurements corroborated the formation of a protective inhibitor film on the steel surface. These findings highlight the potential of bio-waste-derived materials as a sustainable and environmentally benign corrosion inhibitor for mild steel in acidic environments. This journal is The Royal Society of Chemistry, 2026
Source
RSC Advances;Volume;16;Issue;8;pp.6915-6930
Date
01-01-2026
Publisher
Royal Society of Chemistry
Coverage
Murari A., Department of Chemistry, Christ University, Karnataka, Bengaluru, 560029, India; A A., Department of Chemistry, Nitte Meenakshi Institute of Technology, Nitte (Deemed to be University), Karnataka, Bengaluru, 560064, India; Sirimahachai U., Centre of Excellence for Innovation in Chemistry, Division of Physical Science, Faculty of Science, Prince of Songkla University, Hat Yai, Songkla, 90112, Thailand; Rao S., Department of Chemistry, Nitte Meenakshi Institute of Technology, Nitte (Deemed to be University), Karnataka, Bengaluru, 560064, India; Hegde G., Department of Chemistry, Christ University, Karnataka, Bengaluru, 560029, India
Rights
All Open Access; Gold Open Access
Relation
ISSN: 20462069; CODEN: RSCAC
Format
online
Language
English
Type
Article

Citation

Murari, Anvitha; A, Arathi; Sirimahachai, Uraiwan; Rao, Srilatha; Hegde, Gurumurthy, “Corrosion inhibition of mild steel using eco-friendly porous nanocarbon derived from waste mango kernels: a step towards sustainability,” CHRIST (Deemed To Be University) Institutional Repository, accessed June 19, 2026, https://archives.christuniversity.in/items/show/22592.

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