Zinc liquid steel strip for packing of plating introduction

Packing of steel belt into molten zinc liquid, can evenly to pack liquid zinc plating to the steel band, and the adhesion strength of the coating and substrate is stronger, this feature is called liquid zinc steel strip for package can be plated. Liquid zinc can steel strip for package can be plated, first of all because the zinc liquid steel strip for packing has invasive, namely the packaging steel strip after entering in liquid zinc, both to intimate contact, and packaging steel strip after leaving the zinc pot, the zinc on the surface of the liquid can be evenly attached on the surface of packing tape. The first effect is a physical effect, is both the result of surface tension. Solid and liquid phase of material of two kinds of different contact surface of the surface tension of the differences in general depends on the density difference between the two. If the larger solid density and fluid density is small, the solid surface of the larger tension to make liquid to a solid surface evenly spread out, that is to say after the solid into liquid of invasive good, also is on hot dip can be plated. Solid or liquid will form a ball, that is to say, invasive is not good, also is on hot dip plating is bad. This mechanism is the opposite of pretreatment process of degreasing, in the aspect of the combination of water and oil, the water's surface tension, the surface tension of the oil is small, so the oil can't become a ball, only after adding surfactants, reduce water surface tension, lower than the oil surface tension, to make the oil into spherical globules to remove.