عنوان مقاله [English]
Metal corrosion represents a significant cost to the industry. Detection and prevention are possible by use of various methods including electrochemical technics and corrosion inhibitors. In the present study, the performance of two types of inhibitors, 5-bromo-2-(((1-hydroxybutan-2-yl)imino)methyl)phenol (C11H14BrNO2) and 2-((2-((2-hydroxybenzylidene)amino)ethyl)amino)phenol C15H16N2O2, was investigated in reducing corrosion rate of A106 Gr.b alloy steel used in oil pipelines in corrosive medium of 1M sulfuric acid. The comparison between these two inhibitors and the role of nitrogen in their performance and their life span were investigated by cyclic voltammetric electrochemical technique and fast Fourier transform method for data processing. It was found that the C11H14BrNO2 inhibitor by having a slower kinetics in the decomposition process can stand longer and was more effective than the other corrosion inhibitor. This C11H14BrNO2 inhibitor also has a much better performance in preventing carbon corrosion, despite having a lower nitrogen element in the structure because of its favorable spatial structure and better placement of “N” on the corroded metal surface.