New Vitreous Phase as Mild Steel Inhibitors in Hydrochloric Acid

Document Type : Original Article


Corrosion inhibition of mild steel by two new glassy materials correlated with the
ternary system Bi2O3-B2O3-P2O5 in HCl 1.0 M medium was evaluated using different technics:
Gravimetry and electrochemical methods (polarization and electrochemical impedance
spectroscopy (EIS)). The results show that the inhibition efficiency depends on the
concentration of the two compounds studied (1BHP, 2BHP) and the temperature. The
adsorption model obeys to Langmuir isotherm. Thermodynamic parameters were calculated
and analysed. The morphology of the steel surface was characterized by scanning electron
microscopy (SEM) coupled with EDX.