Synthesis and anticorrosion properties of lithium zinc phosphate pigment

In this article, lithium zinc phosphate pigment was synthesized via co-precipitation method and anticorrosion properties of the product were investigated. The synthesized pigment was characterized by x-ray diffraction (XRD) and Fourier transform infrared (FTIR). Morphology of the powders was examined by scanning electron microscope (SEM). The inhibition efficiency of this pigment was compared to the commercial zinc phosphate pigment in a 3.5 % NaCl solution by means of electrochemical impedance spectroscopy (EIS) on mild steel specimens. The XRD results revealed that LiZnPO4 presents as major phase and LiZn2PO4.HPO4 and ZnO are as minor phases. The EIS results indicate better corrosion inhibitive performance of potassium zinc phosphate in comparison with the commercial zinc phosphate.