ELECTROCHEMICAL, SEM AND FTIR STUDY OF THE CORROSION INHIBITION OF JANUVIA FOR Zn IN HYDROCHLORIC...

The inhibitive activity of Januvia on zinc corrosion in HCl was investigated using electrochemistry, scanning electron microscopy (SEM), and Fourier Transform Infrared Spectroscopy (FTIR). Januvia reduced zinc corrosion in HCl by being adsorbed on the metal's surface, according to the findings. According to the polarisation data, Januvia limits the active areas for cathodic and anodic reactions, preserving the metal from corrosion. The adsorption of Januvia on the surface of zinc was discovered to be spontaneous and followed the physical adsorption mechanism. Also, the Temkin adsorption isotherm best described the inhibitor's adsorption characteristics. According to the FTIR results, certain functional groups of the inhibitor were gone after being adsorbed on the metal's surface; others were re-characterized by variations in frequency of absorption, while just a few new bonds were formed. The creation of a protective coating is plausible based on the SEM pictures of inhibited strips acquired. As a result, the use of Januvia as a zinc corrosion inhibitor is recommended in this study.

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