| Issue |
BIO Web Conf.
Volume 205, 2025
2025 10th International Conference on Energy Efficiency and Agricultural Engineering (EE&AE 2025)
|
|
|---|---|---|
| Article Number | 01013 | |
| Number of page(s) | 6 | |
| DOI | https://doi.org/10.1051/bioconf/202520501013 | |
| Published online | 16 December 2025 | |
Inhibition effect of propolis from Central Bulgaria of corrosion steel plates in H2SO4 solutions
1 University of Ruse “Angel Kanchev”, Branch-Razgrad, Razgrad, Bulgaria
2 Technical University of Sofia, Sliven Faculty and College, Sliven, Bulgaria
3 University “Prof. Dr. Assen Zlatarov”, Burgas, Bulgaria
4 University of Food Technologies, Plovdiv, Bulgaria
* Corresponding author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Corrosion is a phenomenon that is widespread and causes significant damage to technological equipment. Various natural products rich in polyphenolic acids and flavonoids are used today as anti-corrosion agents. This study aims to investigate the corrosion activity of propolis from Central Bulgaria in sulfuric acid solutions with three molarities: 0.1, 0.5, and 1. Steel plates were used in ethanol solutions of propolis with a concentration of 0.25, 0.50, 0.75, 1.0, and 1.5%. Inhibition rate, protection degree, and inhibitor activity coefficient were measured. The lowest corrosion rate (0.14) is observed in 0.1 M H2SO4 with an inhibitor of a 1.5% ethanol solution of propolis. The best protection degree (94.92%) and the highest inhibition efficiency (19.68) are found in 1M H2SO4 with an inhibitor of a 1.5% ethanol solution of propolis. The results show that propolis is an effective “green” corrosion inhibitor.
© The Authors, published by EDP Sciences, 2025
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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