The Influence of the Thickness of a Rebar on the Growth Kinetics and Structure of Hot Dip Zinc Coatings

In the paper the results of tests on obtaining zinc coatings on reinforcing steel are presented. The coatings were obtained in a zinc bath on B500SP rebars of various diameters. The structure of coatings obtained on rebars with the diameter of 12, 16, 20 and 32 mm has been developed. The chemical composition of structural components of the coating has been established. The growth kinetics of coatings obtained in the traditional galvanizing process at the temperature of 450°C has been established and the impact of the rebar diameter upon the coating growth curve has been defined. The obtained coatings are continuous and they are quite thick. Moreover, it has been determined that an increase in the rebar thickness induces an increase in the coating thickness.