Experimental and theoretical study on the corrosion
 inhibition of mild steel by 
ethyl 1-(((4-acetylphenyl)((3-(ethoxycarbonyl)-1H-p
yrazol-1-yl)methyl)amino) 
methyl)-5-methyl-1H-pyrazole-3-carboxylate in sulfu
ric acid solution

S. EL Arouji
1; K. Alaoui Ismaili
1; A. Zerrouki
2; S. El Kadiri
2; A. El Assyry
3; Z. Rais
1; M. 
Filali  Baba
1; M. Taleb
1; A. Zarrouk
2; A. Aouniti
2; B. Hammouti
2

Abstract

Experimental and theoretical study on the corrosion inhibition of mild steel by ethyl 1-(((4-acetylphenyl)((3-(ethoxycarbonyl)-1H-p yrazol-1-yl)methyl)amino) methyl)-5-methyl-1H-pyrazole-3-carboxylate in sulfu ric acid solution

Author(s): S. EL Arouji 1 , K. Alaoui Ismaili 1 , A. Zerrouki 2 , S. El Kadiri 2 , A. El Assyry 3 , Z. Rais 1 , M. Filali Baba 1 , M. Taleb 1 , A. Zarrouk 2 , A. Aouniti 2 and B. Hammouti 2

The corrosion inhibition of mild steel in 0.5 M H 2 SO 4 using ethyl 1-(((4-acetylphenyl)((3-(ethoxycarbony l)-1H- pyrazol-1-yl)methyl)amino)methyl)-5-methyl-1H-pyraz ole-3-carboxylate (APC) at 298 K have been investig ated. The study was performed using weight loss method, p otentiodynamic polarization, and electrochemical im pedance spectroscopy (EIS). The experimental results sugges t that the inhibition efficiency of this compound i ncreases with the increase in inhibitor concentration. Adsorption of this compound on mild steel surface obeys Langm uir’s isotherm. Polarization measurements proved that thi s inhibitor behave as mixed type. EIS data showed t hat the charge transfer resistance of mild steel increases in acid solution containing inhibitor. Correlation between quantum chemical calculations and inhibition effici ency of the investigated compound is discussed usin g the Density Functional Theory method (DFT).

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