Abstract
Three N-substituted methyl ethylenediamine derivatives, tetramethylethylenediamine (TDA), pentamethyldiethylenetriamine (PTA), and hexamethyltriethylenetetramine (HTA) were prepared for the corrosion inhibition of 20# steel in 1 M HCl solution. Their corrosion inhibition properties were investigated using weight loss, potentiodynamic polarization (PDP), electrochemical impedance spectroscopy (EIS) measurements, and surface analysis techniques. Quantum chemical calculations and molecular dynamics (MD) simulations were applied to analyze the molecular structure-activity relationship of corrosion inhibitors. The results indicated that all three methyl ethylenediamine derivatives exhibited excellent inhibition properties. The order of inhibition efficiency of these inhibitors was TDA < PTA < HTA. Furthermore, all three inhibitors act as mixed-type inhibitors and mainly inhibited the cathodic reaction. The adsorption mechanism of corrosion inhibitors follows the Langmuir isotherm and proceeds by physisorption and chemisorption. The results of quantum chemical calculations and MD simulations effectively support the experimental results. The excellent corrosion inhibition property is attributed to the interaction between tertiary amine groups and Fe, which effectively inhibits corrosion.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: 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.