Investigation of Process and Response Variables of Electro Galvanizing Process

Abstract

Electro Galvanizing is widely used process to protect the surface of metal from getting corroded. Zinc layer is deposited on the surface of the metal. Zinc layer cuts off any contact with the environment and protects the substrate. Zinc coating have many factors on which quality of coating depends upon. Four of them are Current applied during coating, Time of deposition, Bath solution concentration and Temperature of the Bath. Samples were coated with different values of input variables. Response variables like Hardness of coating, Thickness of coating and surface roughness of coating were tested. Using Taguchi’s method and ANOVA analysis, optimum setting of Zinc coating were found. Each response variable has percentage of contributing input variable. Most visible among them were recorded for optimum operations.