FLUX AND METHOD FOR MANUFACTURING STEEL PRODUCT COATED FROM Zn-Al-Mg ALLOY OBTAINED BY MELTING DIP WITH THE USE OF THE MENTIONED FLUX Russian patent published in 2022 - IPC C23C2/02 C23C2/06 C23C2/30 

FIELD: coatings.

SUBSTANCE: inventions group relates to variants of a flux for applying a coating of an alloy based on Zn-Al-Mg by hot dip and to a method for producing a steel product with a coating of an alloy based on Zn-Al-Mg obtained by hot dip using a flux. The flux contains ZnCl₂, a chloride with low reactivity with Mg in the metal plating bath, containing at least two chlorides selected from the group of compounds consisting of alkali metal chlorides and alkaline earth metal chlorides. Moreover, the flux essentially contains neither NH₄Cl nor NaF, and the composition of ZnCl₂ and chloride with low reactivity is controlled so that the liquidus temperature of said flux is 450°C or lower even when all the ZnCl₂ contained in said flux was replaced by MgCl₂. The low reactivity chloride comprises NaCl and KCl or NaCl, KCl and an auxiliary chloride including at least one of Sn, Pb and Bi chlorides.

EFFECT: obtaining a steel product coated with an alloy based on Zn-Al-Mg by a hot-dip method, having a good appearance of the deposited metal coating, without raising the temperature of the bath, and also without preheating the steel product before dipping into the plating bath.

6 cl, 5 dwg, 7 tbl