Original scientific paper
https://doi.org/https://doi.org/10.5599/jese.2181
Corrosion inhibition performance of copper using N-benzylhy-drazinecarbothioamide in a 3.5 % NaCl solution
Arafat Toghan
; Chemistry Department, Faculty of Science, South Valley University, Qena 83523, Egypt
Hanan Alhussain
; Chemistry Department, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh 11623, Saudi Arabia
Azza Attia
; Chemistry Department, Faculty of Science and Arts, Najran University, Najran, Saudi Arabia
Omar K. Alduaij
; Chemistry Department, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh 11623, Saudi Arabia
Ahmed Fawzy
; Department of Chemistry, Faculty of Science, Assiut University, Egypt
Ahmed M. Eldesoky
; Department of Chemistry, University College in Al-Qunfudhah 21912, Umm Al-Qura University, Saudi Arabia
Ahmed Farag
; Egyptian Petroleum Research Institute (EPRI), Cairo 11727, Egypt
Abstract
In this report, N-benzylhydrazinecarbothioamide (BHCTA) was investigated as an organic inhibitor for the corrosion of copper substrate in 3.5 wt.% sodium chloride electrolyte at 298 K. The inhibition efficiency of BHCTA was examined using electrochemical, chemical and theoretical tools. The gained outcomes indicated a supreme inhibition efficiency of BHCTA which exceeded 95 % upon addition of 1.00 mM of BHCTA. Such supreme efficiency was discussed on the basis of decisive adsorption of BHCTA molecules on the copper substrate that hinders concurrently the anodic oxidation and cathodic reduction reactions progressions. The adsorption of BHCTA on the copper surface was discovered to obey Langmuir isotherm. The resulting value of DGads0 = −35.7 kJ mol−1 indicates that BHCTA molecules adsorb on the copper surface through a spontaneous mix of physisorption and chemisorption processes. A scanning electron microscope was used to examine the effect of BHCTA adsorption on the morphology of the copper surface. Theoretical calculations showed that BHCTA has good adsorption properties on Cu substrate. There is a good consistency between the applied experimental and theoretical tools, confirming the validity of the gained outcomes.
Keywords
Copper corrosion; aqueous NaCl; organic inhibitor; adsorption
Hrčak ID:
315924
URI
Publication date:
9.4.2024.
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