| Issue |
E3S Web Conf.
Volume 587, 2024
International Scientific Conference on Green Energy (GreenEnergy 2024)
|
|
|---|---|---|
| Article Number | 03004 | |
| Number of page(s) | 5 | |
| Section | Enhancing Energy Efficiency in Industry | |
| DOI | https://doi.org/10.1051/e3sconf/202458703004 | |
| Published online | 07 November 2024 | |
Investigation of physicochemical properties of guanidine-based corrosion inhibitor
1 Bukhara State University, Bukhara city, Uzbekistan
2 Bukhara engineering-technological institute, Bukhara, Uzbekistan
* Corresponding author: s.i.nazarov@buxdu.uz
Physico-chemical analyzes were used to investigate the anti-corrosion potential of guanidine thiocyanate derivatives for steel in 2.5 M HCl-HF solution in the temperature range of 70-90°C. The obtained results proved that the inhibition efficiency increases with the increase of inhibitor concentration from 1.1•10-4 M to 9.8•10-4 M. The degree of protection at the minimum concentration of the inhibitor in the HCl-HF solution at 70°C was 92.1%. The values of Gibb’s energy (ΔGoadsor.) for the process ranged from -18.78 kJ/mol to -28.63 kJ/mol. This result indicates the spontaneous adsorption of inhibitors on the steel surface, and the adsorption mechanism is chemisorption. Analyzing the values of enthalpy (ΔH°), it was found that the adsorption of the inhibitor on the steel surface was endothermic. The entropy value of chemosorption means that this process occurs with a decrease in entropy.
© The Authors, published by EDP Sciences, 2024
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