Protection of Copper From Corrosion With Nicotinamide Inhibitor

Abstract

Copper is used extensively in industry since its superior metallic properties. Since the corrosion resistance of copper is low in acidic media, it is important to apply corrosion prevent methods. In this study, the environmentally friendly nicotinamide compound was used as an inhibitor to protect copper from corrosion. In this study, firstly, the Cyclic Voltammetry Technique was used to determine the electrochemical behavior of copper in 0.1 M HCl acid solution. Then, Tafel polarization method was applied to determine the corrosion behavior of copper in 0.1 M HCl acid solution in the absence of nicotinamide inhibitor and in the presence of 500 ppm, 750 ppm, 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 inhibition efficiency was obtained as 95.3% in 1000 ppm nicotinamide concentration in 30 minutes residence time, and the best corrosion potential was -0.145 V in 1000 ppm nicotinamide concentration in 45 minutes residence time. 750 ppm inhibitor concentration can be used in cases where the duration is not important, as the inhibition efficiency value is reached as 94.6% in a 60 minutes residence time at a 750 ppm nicotinamide concentration.

Keywords

• copper
• corrosion
• tafel polarization
• nicotinamide
• inhibitor