Ecofriendly Corrosion Inhibitor for Controlling Corrosion of CS Immersed in Hydrochloric Acid Solution

The corrosion inhibitor's effect on carbon steel (CS) corrosion in 1N hydrochloric acid was investigated in this work. The inhibitor was derived from a water-based Trichosanthes cucumerina Linn plant extract (TCPL). The primary goal was to ascertain the efficacy and environmental safety of this technique. Our evaluation was based on the mass loss method. An inhibitory efficacy of 86.63% was achieved using this strategy. The mechanisms of corrosion inhibition have been investigated using electrochemical methods including PDP and EIS. Inhibition efficacy and corrosion rate are both affected by inhibitor concentration. There is equal regulation of the anodic and cathodic processes in the mixed-inhibitor inhibitor system. The findings of the PDP study corroborate this. The corrosion current and the resistance to linear polarisation may both be efficiently reduced by inhibitors. When inhibitor systems are present on metal surfaces, electrochemical impedance investigations have shown that a protective covering, called the blanket effect, arises. A decrease in double layer capacitance and an increase in charge transfer resistance have been noted. The process of the protective layer's creation on the CS surface was explained by an FTIR investigation. Molecular bonds are formed between the metal and the active component, causing this process to occur. We used SEM and AFM to look at the protective layer's surface morphology. Comparing CS's surface element composition to those of blank, polished and inhibitor systems was done using EDAX technology. The results of the research could be useful for the acid-pickling industry.