Abstract: By first fluxing a steel long product with novel specific flux compositions, it is possible to continuously produce, more uniform, smoother and void-free galvanized coatings on such steel long products in a single hot dip galvanization step making use of zinc-aluminum alloys or zinc-aluminum-magnesium alloys with less than 95 wt. % zinc. This is achieved by providing potassium and sodium chlorides in a KCl/NaCl weight ratio of at least 2.0 in a flux composition comprising (a) more than 40 and less than 70 weight % zinc chloride, (b) from 10 to 30 weight % ammonium chloride, (c) more than 6 and less than 30 weight % of a set of at least two alkali metal chlorides.

Abstract: A flux composition for treating a metal surface prior to batch hot galvanizing in molten zinc-based alloys is disclosed. The flux composition can include (a) 40 to 70 wt. % zinc chloride, (b) 10 to 30 wt. % ammonium chloride, (c) 6 to 30 wt. % of a set of at least two alkali or alkaline earth metal halides, (d) from 0.1 to 2 wt. % lead chloride, and (e) from 2 to 15 wt. % tin chloride, provided that the combined amounts of lead chloride and tin chloride represent at least 2.5 wt. % of the composition. A fluxing bath having this flux composition dissolved in water for use in galvanizing processes, as well as, a method for continuous or batch-wise treatment of metal articles in order to produce a protective coating layer with a thickness ranging from 5 to 30 ?m is also disclosed.

Abstract: By first fluxing a steel long product with novel specific flux compositions, it is possible to continuously produce, more uniform, smoother and void-free galvanized coatings on such steel long products in a single hot dip galvanization step making use of zinc-aluminum alloys or zinc-aluminum-magnesium alloys with less than 95 wt. % zinc. This is achieved by providing specific amounts of lead chloride and tin chloride in a flux composition comprising (a) more than 40 and less than 70 weight % zinc chloride, (b) from 10 to 30 weight % ammonium chloride, (c) more than 6 and less than 30 weight % of a set of at least two alkali or alkaline earth metal chlorides.

Abstract: The present invention generally relates to a flux for hot dip galvanization comprising from: 36 to 80 wt. % (percent by weight) of zinc chloride (ZnCl2); 8 to 62 wt. % of ammonium chloride (NH4C); from 2.0 to 10 wt. % of a least one of the following compounds: NiCl2, MnCl2 or a mixture thereof. The invention further relates to a fluxing bath, a process for the hot dip galvanization of an iron or steel article as well as to the use of said flux.

Abstract: This invention relates to a flux composition for treating a metal surface prior to batch hot galvanizing in molten zinc-based alloys. The composition comprises (a) more than 40 and less than 70 wt. % zinc chloride, (b) 10 to 30 wt. % ammonium chloride, (c) more than 6 and less than 30 wt. % of a set of at least two alkali or alkaline earth metal halides, (d) from 0.1 to 2 wt. % lead chloride, and (e) from 2 to 15 wt. % tin chloride, provided that the combined amounts of lead chloride and tin chloride represent at least 2.5 wt. % of said composition. The invention further relates to a fluxing bath comprising this flux composition dissolved in water for use in galvanizing processes, by batch or continuously, of metal articles such as iron or steel long products and flat products, thus affording a protective coating layer with a thickness ranging from 5 to 30 ?m.

Abstract: By first fluxing a steel long product with novel specific flux compositions, it is possible to continuously produce, more uniform, smoother and void-free galvanized coatings on such steel long products in a single hot dip galvanization step making use of zinc-aluminum alloys or zinc-aluminum-magnesium alloys with less than 95 wt. % zinc. This is achieved by providing potassium and sodium chlorides in a KCl/NaCl weight ratio of at least 2.0 in a flux composition comprising (a) more than 40 and less than 70 weight % zinc chloride, (b) from 10 to 30 weight % ammonium chloride, (c) more than 6 and less than 30 weight % of a set of at least two alkali metal chlorides.

Abstract: This invention relates to a flux composition for treating a metal surface, comprising (a) more than 40 and less than 70 wt. % zinc chloride, (b) 10 to 30 wt. % ammonium chloride, (c) more than 6 and less than 30 wt. % of a set of at least two alkali metal chlorides including sodium chloride and potassium chloride, (d) from 0 to 2 wt. % lead chloride, and (e) from 0 to 15 wt. % tin chloride, provided that the KCl/NaCl weight ratio of said set of at least two alkali metal chlorides ranges from 2.0 to 8.0. This invention also relates to a fluxing bath comprising this flux composition dissolved in water for use in galvanizing processes, by batch or continuously, of metal articles such as iron or steel long products and flat products including wires, plates, coils, rods, reinforcing bars, tubes, strips and sheets.

Abstract: By first fluxing a steel long product with novel specific flux compositions, it is possible to continuously produce, more uniform, smoother and void-free galvanized coatings on such steel long products in a single hot dip galvanization step making use of zinc-aluminum alloys or zinc-aluminum-magnesium alloys with less than 95 wt. % zinc. This is achieved by providing specific amounts of lead chloride and tin chloride in a flux composition comprising (a) more than 40 and less than 70 weight % zinc chloride, (b) from 10 to 30 weight % ammonium chloride, (c) more than 6 and less than 30 weight % of a set of at least two alkali or alkaline earth metal chlorides.

Abstract: The present invention generally relates to a flux for hot dip galvanization comprising from: 36 to 80 wt. % (percent by weight) of zinc chloride (ZnCl2); 8 to 62 wt. % of ammonium chloride (NH4C); from 2.0 to 10 wt. % of a least one of the following compounds: NiCl2, MnCl2 or a mixture thereof. The invention further relates to a fluxing bath, a process for the hot dip galvanization of an iron or steel article as well as to the use of said flux.

Abstract: A flux for hot dip galvanization comprises from 60 to 80 wt % of zinc chloride (ZnCl2); 7 to 20 wt % of ammonium chloride (NH4Cl); 2 to 20 wt % of a fluidity modifying agent comprising at least one alkali or alkaline earth metal; 0.1 to 5 wt % of at least one of the following compounds: NiCl2, CoCl2, MnCl2 and 0.1 to 1.5 wt % of at least one of the following compounds: PbCl2, SnCl2, BiCl3 and SbCl3.

Abstract: A flux for hot dip galvanization comprises from:&Circlesolid;60 to 80 wt. % of zinc chloride (ZnCl2); 7 to 20 wt. % of ammonium chloride (NH4Cl); 2 to 20 wt. % of a fluidity modifying agent comprising at least one alkali or alkaline earth metal; 0.1 to 5 wt. % of a least one of the following compounds: NiCl2, CoCl2, MnCl2; and 0.1 to 1.5 wt. % of at least one of the following compounds: PbCl2, SnCl2, BiCl3, SbCl3.