Résumé

Dehydroacetic acid thiosemicarbazone (DHATSC) was tested for its ability to suppress
corrosion on mild steel XC38 (MS XC38) by measuring its effects by electrochemical impedance
spectroscopy (EIS), weight loss (WL), and potentiodynamic polarization (PDP). Using weight loss
tests and potentiodynamic polarization, the corrosion inhibiting efficiency (IE) of DHATSC for MS
XC38 in 1.0 M HCl solution was calculated. The data showed that DHATSC was highly inhibitory,
with increasing effectiveness as the inhibitor concentration increased. In 1 M HCl, the PDP curves
showed that DHATSC was a mixed-type inhibitor. In addition to the EIS findings, the adsorption
of DHATSC was also validated by analyzing the charge transfer resistance (Rct) values of the MS
XC38 surface. At room temperature, the most outstanding corrosion inhibition efficiency as determined by weight loss was 78%; however, the PDP method obtained 94% at a concentration of
200 ppm. With a standard free energy (Gads) of
6.90 KJ.mol-1 for the adsorption stage, the Langmuir isotherm offered the most accurate description of DHATSC adsorption. The inhibitor has a
nanocrystalline structure, measured by X-ray diffraction (XRD), with a mean crystallite size (D) of
56.11 nm. Scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy
(FTIR) analyses verified the mild steel’s surface analysis. The theoretical calculations generally
agreed with the experimental findings to a high degree.

Information

Item Type:	Journal
Divisions:	» Faculté des Sciences et de la Technologie
ePrint ID:	4235
Date Deposited:	2023-06-26
Further Information:	Google Scholar
URI:	https://www.univ-soukahras.dz/fr/publication/article/4235

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