The effect of Nicotinamide, the green inhibitor, to the corrosion of stainless steel in acidic media

Stainless steel is the most used metal all over the world. Since the corrosion resistance of steel is low in acidic medium and the use of acid in industry is very common, it is important to protect the steel from corrosion. In this study, the environmentally friendly nicotinamide compound was used as an inhibitor to protect steel from corrosion. In the study, firstly, the cyclic voltammetry technique was used to determine the electrochemical behavior of the steel in 0.1 M HCl acid solution. Then, Tafel Polarization Method in 0.1 M HCl acid solution was applied to determine the corrosion behavior of steel in the absence of nicotinamide inhibitor, in the presence of 500 ppm, 750 ppm and 1000 ppm nicotinamide. The optimum time was determined for each concentration by keeping the inhibitor at these 3 different concentrations for 0, 15, 30, 45 and 60 minutes. The highest inhibitory efficiency was found to be 96.8% in 1000 ppm nicotinamide concentration in 15 minutes holding time, and 96.6% at 500 ppm nicotinamide concentration in 60 minutes holding time in the absence of time limitation. The results obtained showed that nicotinamide can be used effectively in the protection of stainless steel from corrosion, and due to its environmental friendliness, corrosion protection is provided while not harming the environment and living things.