Performance of aza furamidine derivatives as new corrosion inhibitors for CS in acid environment: The Experimental and Quantum chemical studies

Abstract

Three azafuramidine derivatives (AZFD) as new inhibitors for the corrosion of carbon steel (CS) in acidic solution has been examined by mass loss (ML), atomic absorption spectroscopy (AAS) and electrochemical techniques. The results demonstrated that these new (AZFD) act as good inhibitors for the corrosion of CS in acidic media. The inhibition efficiency (% €) increased as the inhibitor concentrations increases. Potentiodynamic polarization (PP) study showed that (AZFD) may be classified as mixed-type inhibitors. The) adsorption of(AZFD)on metal surface showed a Langmuir isotherm route. The surface analysis of the CS was investigated using ATR-FTIR, UV/visible spectroscopy and AFM analysis. Surface analysis of CS revealed formation of a protective adsorbed surface layer composed of (AZFD). Quantum chemical calculations of the azafuramidine derivatives molecules were computed and discussed.