Zhang S., Li H., Wang L., Liu D., Ping E., Zou P., Ma T., Li N., 2016, New Pyrazine Derivatives as Efficient Inhibitors on Mild Steel Corrosion in Hydrochloric Medium, Chemical Engineering Transactions, 55, 289-294.
Novel pyrazine derivatives PD-1 were synthesized and their inhibitive action against the corrosion of mild steel in 15% HCl solution was studied by weight loss, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) studies. Polarization studies showed that the studied inhibitors were of mixed type in nature. Scanning Electron Microscope (SEM) and Energy dispersive X-ray spectroscopy (EDX) were performed for surface study of uninhibited and inhibited mild steel samples. The pyrazine derivatives are arranged as mixed-type inhibitors in HCl. Inhibition efficiencies increased with increasing concentration of inhibitor. Data obtained from weight loss and electrochemical measurements have shown that the compound has the excellent inhibiting properties for mild steel in HCl solution. The results showed that pyrazine derivatives acted as an excellent and a mixed-type inhibitor via strongly chemical adsorption onto mild steel surface to suppress simultaneously both anodic and cathodic processes.
