Recent Corrosion Inhibitors for Pure Lead (Pb) in 1M Acetic Acid Solution

Lead (Pb) undergoes rapid corrosion in the presence of acetic acid. Inhibited acetic acid is used during this study to prevent corrosion of pure lead (Pb). Brilliant cresyl blue (BCB), Mordant orange 37 (MO) and Crystal violet (CV) are used as effective corrosion inhibitors. The behavior of lead in 1 M acetic acid solution in case of the presence and absence of the selected dyes has been investigated, using weight loss measurements, open-circuit potential measurements and potentiodynamic polarization measurements techniques. The inhibition efficiency was increased with an increase in inhibitor concentration. Polarization measurements reveal that BCB has a maximum value of IE was 73% at 1x10-1 %. From the results, it is found that all techniques are in good agreement and the values of inhibition efficiency are dependent upon the concentration and chemical structure of dyes. The study concluded that the investigated dyes were good corrosion inhibitors for pure lead in 1 M acetic acid solution. The lead corrosion inhibition efficiency of the investigation dyes in 1M acetic follows the order: BCB dye> MO dye > CV dye.