THE EFFECT OF SUBSTRATE MICROSTRUCTURE ON MORPHOLOGY OF ZINC COATINGS

摘要

In this paper the influence of substrate microstructure on iron-zinc alloy layer formation was studied. To achieve different microstructures laboratory heat treatment was used. Heat treatment parameters were chosen to imitate the heat affected zone in welding and thermal cutting processes. Steel grades S355JR, S700MC, C45E and C60E with different microstructures were immersed in a zinc bath at the temperature 450°C. Results show that the ferrite grain size does not affect the coating formation. The coating structure and thickness are influenced by carbide grain size.