International Journal of Engineering Research

Adnan Sultan Abdul-Nabi ¹, Ekhlas Qanber Jasim ²

Affiliations
1 Chemistry Department, College of Education for Pure Sciences, Basrah University, Basrah, IQ
2 Pharmaceutical Chemistry Department, College of Pharmacy, Basrah University, Basrah, IQ

Abstract

Two tetrazole compounds were synthesized. The prepared compounds were identified by CHNS analysis FT-IR and ¹H-NMR spectroscopy. The inhibition efficiency in the presence of tetrazoles as a steel corrosion inhibitor in 0.5M HCl calculated using electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization measurements. Results obtained revealed that tetrazole compounds performed excellently as a corrosion inhibitor for C-steel in this medium and its efficiency attains to 91.34% at 5x10-³M at 303 K by potentiodynamic polarization measurements and 91.66% by EIS in the same conditions. The surface morphology studies (SEM and AFM) showed that these types of inhibitors had a smooth surface with deposited compounds on it for the specimen that treated with acidic inhibited solutions as compared with the surface of those specimens which treated with uninhibited acidic solution.

Keywords

C-Steel Corrosion, Tetrazole, EIS, Surface Morphology.

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