Zaidoun K. Kuraimid - Department of Chemistry, Faculty of Science, Mansoura University, Mansoura ۳۵۵۱۶, Egypt
Abd El-Aziz S. Fouda S. Fouda - Department of Chemistry, Faculty of Science, Mansoura University, Mansoura ۳۵۵۱۶, Egypt
Dawood S. Abid - Department of Chemistry,College of Education for Pure Science, Basra University, Basra, ۶۱۰۰۴, Iraq

This study showcases the innovative synthesis of ۴-formyl-N-hexadecyl-N,N-dimethylbenzenaminium bromide (FHDB) using a reaction of ۱-Bromohexadecane and ۴-di methyl amino benzaldehyde. The compound was then characterized through various techniques such as FT-IR, ۱H-NMR, and ۱۳C-NMR, along with physical property measurements. Thereafter, the synthesized FHDB was tested for its corrosion inhibition properties on C-steel in ۶M HCl, with a focus on kinetics and thermodynamics using potentiodynamic polarization (PDP). The surface changes of the C-steel were observed through Scanning Electron Microscopy (SEM) and Atomic Force Microscopy (AFM). The study revealed that FHDB exhibited strong inhibitory properties against corrosion in ۶M hydrochloric acid solutions, with an adsorption pattern on the steel surface in agreement with Langmuir adsorption isotherm. The results, which include corrosion and electrochemical testing data, demonstrate that the experimental corrosion inhibitors are typically practically equal between the fluid flow study (dynamic simulations) and the static study, which is attributable to the FHDB chemical structure.

FHDB, Corrosion Inhibition, C-steel, ۶M HCl, potentiostatic polarization, Langmuir adsorption isotherm, Dynamic autoclave