MORPHOLOGY OF ZINC MICRO-ALLOYED COATINGS

摘要

The surface morphology of the zincked sheets is formed after the solidification of the melted metal, carried along the carrier strap during its extraction of the zincking bath. This surface layer is dependent on the fluidity of the melting, on its superficial tension and on the solidification characteristics according to the chemical composition of the melting. The elements of microalloying can improve the surface quality of the zincked steel by: uniformity, texture, luminosity. Depending on the combination elements of microalloying the surface can have different types of metallic layers with an important effect on the coating morphology. The research made revealed the important effect it had at microalloying with Al, Sn, Bi, Pb on the coating layer's morphology.