M. Divandari - IUST
M. Mehrabian

This paper investigates the difference between thickness of zinc-based alloys oxide films in dynamic condition using the oxide-metal-oxide (OMO) sandwich method and static condition by theoretical calculations. In dynamic condition, the thickness of the oxide film in the OMO sandwich sample was characterized by scanning electron microscopy (SEM). In the static condition, the thickness and type of the oxide films were studied based on thermodynamic and kinetic estimations. The results showed that the oxide film thickness in molten Zn۴Al and ZA۲۷ alloys using OMO sandwich method was estimated to be in the range of ۷۰-۲۰۰ nm and ۳۰-۱۰۰ nm, respectively. However, the thickness of oxide films in the static oxidation based on the theoretical calculations, regardless of melt chemical composition, were about ۲-۵ nm.

Zn alloys, OMO sandwich method, Dynamic oxidation, Static oxidation, Surface oxide film