Corrosion inhibition performance of copper using N-benzylhy-drazinecarbothioamide in a 3.5 % NaCl solution

Original scientific paper

Authors

DOI:

https://doi.org/10.5599/jese.2181

Keywords:

Copper corrosion, aqueous NaCl, organic inhibitor, adsorption
Graphical Abstract

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.

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Published

19-02-2024 — Updated on 19-02-2024

How to Cite

Toghan, A., Alhussain, H., Attia , A., Alduaij, O. K., Fawzy, A., Eldesoky, A. M., & Farag, A. (2024). Corrosion inhibition performance of copper using N-benzylhy-drazinecarbothioamide in a 3.5 % NaCl solution: Original scientific paper. Journal of Electrochemical Science and Engineering, 14(2), 231–245. https://doi.org/10.5599/jese.2181

Issue

Section

Corrosion

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