The Effect on Some Controlling Factors of Quality of Hot-Dip Galvanized Coatings

Abstract

This article presents a study related to hot-dip galvanizing as a method to protect the steel surface. Two types of alloys were studied: Zn-Al and Zn-Al-Ti-B, each in 5 different concentrations. Besides the composition of the deposited alloys as variable parameters the immersion time of the steel samples in the galvanizing bath and the bath temperature were also taken into consideration. In this study, it was observed the effect of these parameters on the thickness of galvanized layers, the aspects related to the structure, and the adhesion of deposited layers onto steel substrates. Thermal analysis studies were made to highlight the effect of Zn alloy composition and galvanizing temperature on the structural transformation in deposited layer.