FLUX FOR THE HOT ZINC-COATING AND THE METHOD OF THE HOT ZINC-COATING Russian patent published in 2006 - IPC C23C2/06 C23C2/30 

FIELD: nonferrous metallurgy; fluxes and methods of the hot zinc-coating.

SUBSTANCE: the invention is pertaining to the nonferrous metallurgy, in particular to the flux and the method of deposition of the melt zinc-coatings on the metal products by dipping, in particular, to the hot zinc-coating of the steel and iron products. The flux contains from 60 up to 80 mass % of zinc chloride, from 7 up to 20 mass % of ammonium chloride, from 2 up to 20 mass % at least of one salt alkaline or earth metal, from 0,1 up to 5 mass % at least of one such compounds as_{NiCl2,CoCl2 andMnCl2, and from 0.1 up to 1.5 mass % at least of one of such compounds, asPbCl2,SnCl2,BiCl2 andSbCl2. The bath for the fluxing contains the mentioned above flux in the solved in water state. The method of the hot zinc-coating includes the defatting of the products, flushing, etching, flushing, the bath treatment for a fluxing, drying, the hot zinc-coating and cooling. The bath for the hot zinc-coating contains from 2 up to 56 mass % Al, from 0.005 up to 0.15 mass % Sb and-or from 0.005 up to 0.15 mass % Bi, maximum up to 0.005 mass % Pb, maximum up to 0.005 mass % Cd and maximum up to 0.002 mass % Sn, Zn - the rest. The bath for the hot zinc-coating contains up to 56 mass % Al, from 0.005 up to 0.15 mass % Sb, maximum up to 0.005 mass % Pb, maximum up to 0.005 mass % Cd and maximum up to 0.002 mass % Sn, Zn - the rest. The technical result of the invention is: production of the continuous homogeneous smooth and free from breakings coatings on the cast iron or steel products.}

EFFECT: the invention ensures deposition of the continuous homogeneous smooth and free from breakings coatings on the products made out of cast iron or steel.

28 cl, 3 ex