Synergistic Effect of Chitosan Biguanidine Hydrochloride Salt as a Green Inhibitor for Stainless Steel Alloy Corrosion in a 0.5 M H2SO4 Solution
El Nemr, A., Elhebshi, A., El-Deab, M., Ashour, I., Ragab, S. (2022). Synergistic Effect of Chitosan Biguanidine Hydrochloride Salt as a Green Inhibitor for Stainless Steel Alloy Corrosion in a 0.5 M H2SO4 Solution. EKB Journal Management System, 65(2), 389-398. doi: 10.21608/ejchem.2021.87235.4219
Ahmed El Nemr; Abdualah Elhebshi; Mohamed S. El-Deab; Ibrahim Ashour; Safaa Ragab. "Synergistic Effect of Chitosan Biguanidine Hydrochloride Salt as a Green Inhibitor for Stainless Steel Alloy Corrosion in a 0.5 M H2SO4 Solution". EKB Journal Management System, 65, 2, 2022, 389-398. doi: 10.21608/ejchem.2021.87235.4219
El Nemr, A., Elhebshi, A., El-Deab, M., Ashour, I., Ragab, S. (2022). 'Synergistic Effect of Chitosan Biguanidine Hydrochloride Salt as a Green Inhibitor for Stainless Steel Alloy Corrosion in a 0.5 M H2SO4 Solution', EKB Journal Management System, 65(2), pp. 389-398. doi: 10.21608/ejchem.2021.87235.4219
El Nemr, A., Elhebshi, A., El-Deab, M., Ashour, I., Ragab, S. Synergistic Effect of Chitosan Biguanidine Hydrochloride Salt as a Green Inhibitor for Stainless Steel Alloy Corrosion in a 0.5 M H2SO4 Solution. EKB Journal Management System, 2022; 65(2): 389-398. doi: 10.21608/ejchem.2021.87235.4219

Synergistic Effect of Chitosan Biguanidine Hydrochloride Salt as a Green Inhibitor for Stainless Steel Alloy Corrosion in a 0.5 M H2SO4 Solution

Egyptian Journal of Chemistry
Article 42, Volume 65, Issue 2, February 2022, Page 389-398  XML PDF (819.56 K)
Document Type: Original Article
DOI: 10.21608/ejchem.2021.87235.4219
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Authors
Ahmed El Nemr email orcid 1; Abdualah Elhebshi2; Mohamed S. El-Deaborcid 3; Ibrahim Ashour4; Safaa Ragab5
1Environmental Division, National Institute of Oceanography and Fisheries, Kayet Bey, El-Anfoushy, Alexandria, Egypt
2Chemical Engineering Department, Faculty of Engineering, Elminia University, Elminia, Egypt
3Department of Chemistry, Faculty of Science, Cairo University, Cairo, Egypt
4Chemical Engineering Department, Faculty of Engineering, El-Minia University. El-Minia, Egypt.
5Environmental Division, National Institute of Oceanography and Fisheries (NIOF), Kayet Bey, El-Anfoushy, Alexandria, Egypt
Abstract
The inhibition efficiency (IE) of the hydrochloride salt of chitosan biguanidine (CBG-HCl, a green organic compound) on stainless steel alloy (SS) corrosion in 0.5 M H2SO4 solution was documented in this work. Data reported for electrochemical impedance spectroscopy (EIS) and potentiodynamic analysis confirmed increasing of the corrosion resistance of stainless steel in 0.5 M H2SO4 solution in the presence of CBG-HCl with a synergistic effect of KI. Potentiodynamic experiments also indicate that the blend of CBG-HCl-KI works as a mixed-type inhibitor for stainless steel alloy corrosion. The best information gathered agreed with the Langmuir isotherm model. The corresponding normal Gibbs inhibitor adsorption free energy implied that the processes are random and involved two forms of interactions, chemisorption and physisorption. The highest inhibition efficiency (88 %) in this work was reported for 400 ppm of CBG-HCl blended with 800 ppm KI. In fact, with a long immersion time, the efficiency of CBG-HCl inhibition remains effectively high, demonstrating its good stability in the 0.5 M H2SO4 medium.
Keywords
Chitosan biguanidine; Stainless steel; Corrosion inhibitor; Synergistic effect; EIS; Potentiodynamic
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