Author:
Alghazali Hassan Hadi Masallb,Alfatlawi Abdulraheem kadhim AbidAli
Abstract
The corrosion and hardness resistance of Ni-P coating is well recognized. By adding Zn, the electrochemical and mechanical properties of these coatings can be improved. In the coating procedure, two distinct periods of 1-hour and 2-hours are used. To improve the surface qualities of coating specimens, heat treatment at 400oC for one hour is performed. X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive analysis (EDS) were used to analyze the deposits. The hardness values of the coated heat-treated samples exceeded 900HV when compared to the bare and as-plated samples. The Tafel extrapolation test is used to determine the voltage and corrosion current in a 3.5% NaCl solution in order to calculate the corrosion rate. Corrosion rates are reduced from 1.81 mpy in bare specimens to 0.0642 mpy in heat treated plated specimens.