Open AccessCorrosion Inhibition Studies of Benzilic Acid-Tyrosine Ligand and their Metal Complexes
Author(s) -
N. P. Pranamya
Publication year - 2021
Publication title -
international journal for research in applied science and engineering technology
Language(s) - English
Resource type - Journals
ISSN - 2321-9653
DOI - 10.22214/ijraset.2021.37345
Subject(s) - adsorption , ligand (biochemistry) , chemisorption , chemistry , metal , langmuir adsorption model , inorganic chemistry , tyrosine , transition metal , organic chemistry , catalysis , biochemistry , receptor
A novel amino acid ligand derived from Benzilic acid and Tyrosine and its Cr (II), Fe (III), Co (II) and Ni (II) transition metal complexes were synthesized. The structure elucidation of the ligand and its complexes were derived on the basis of various spectroscopic methods such as Infrared and electronic spectra along with the aid of CHN, magnetic and conductometric measurements1, 2, 3. The corrosion inhibition efficiency of newly synthesized amino acid-mixed ligand and their metal complexes were studied in 0.5M HCl solution. The results show that the inhibitors exhibits an inhibition efficiency of 40-67% at 200ppm.The ligand shows the maximum efficiency whereas on complexation the efficiency tend to decrease. When the concentration of the inhibitor increases, then the efficiency of the inhibitor will increase4. The adsorption studies reveal that iron complex with the mild steel is chemisorption and the thermodynamic parameters such as adsorption, equilibrium constant (K) and free energy of adsorption (∆Gads) were calculated. The curve of the adsorption fits well with Langmuir adsorption isotherm.