Abstract
The inhibiting properties of 2-Amino-1-(4-aminophenyl)-1H-pyrrolo(2,3-b)quinoxaline-3-carbonitrile (AHPQC) were examined of C38 steel corrosion in molar hydrochloric acid using electrochemical techniques. Impedance data displayed the AHPQC inhibits C38 steel corrosion becoming the adsorbate at metal/electrolyte interfaces. Polarization study indicated that AHPQC is an anodic-cathodic inhibitor. The inhibition efficiencies of AHPQC calculated by both methods reaches 91%. The Langmuir adsorption isotherm was observed for the AHPQC adsorption and its adsorption is realized by physical adsorption; due to the protonated forms of the AHPQC molecule in acid medium. XPS technique was used to discuss the mechanism for the adsorption process of the AHPQC molecule.
Highlights
Organic compounds are extensively used to decrease the corrosion of metals and alloys in aqueous media such acidic solutions
Various studies regarding the inhibition of metal corrosion using organic compounds as corrosion inhibitors: triazole [1,2,3], oxathiadiazole [4,5] and carbanitriles derivatives [6,7]
It should be noted that the desorption potential values are practically constant for the different concentrations studied
Summary
Organic compounds are extensively used to decrease the corrosion of metals and alloys in aqueous media such acidic solutions. Various studies regarding the inhibition of metal corrosion using organic compounds as corrosion inhibitors: triazole [1,2,3], oxathiadiazole [4,5] and carbanitriles derivatives [6,7] These molecules usually consist of an aromatic, heteroaromatic having. The select of the inhibitor is established on structure considerations; the AHPQC molecule has aromatic rings with delocalized -electrons and nitrogen atoms in several forms: quinoxaline, pyrrole, nitrile, aniline and amine. These aspects favor the interaction of inhibitor molecule with surface metal
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
