Corrosion Protection of Medium Carbon Steel in Acidic Environment Using Novel Schiff Base Inhibitor

Abstract

The aim of this research work was to investigate the inhibition efficiency of an organic inhibitor added in different concentration under 0.1M, 0.5M and 1M HCl. Medium Carbon steel was used for the study of corrosion rate. During the experimentation, Linear Polarization Resistance and Tafel polarization tests were performed in the absence and presence of inhibitor in the electrochemical cell. Optical Microscope and SEM for surface examination were also conducted for the valuable information regarding the number of pits on the surface of medium carbon steel. The results showed that at 0.1M HCl the inhibitor performed well by lowering the corrosion current. The amount of inhibitor optimized at 0.1 M HCl was observed to be 0.6mM. The absence of inhibitor efficiency was observed at 0.5M and 1M HCl. It was concluded that organic inhibitor showed excellent behavior at lower concentration of HCl while at higher concentration the inhibitor showed no appreciable behavior in the corrosion prevention of Medium Carbon steel.