MXPA99010820A - Alloy and process for galvanizing steel - Google Patents
Alloy and process for galvanizing steelInfo
- Publication number
- MXPA99010820A MXPA99010820A MXPA/A/1999/010820A MX9910820A MXPA99010820A MX PA99010820 A MXPA99010820 A MX PA99010820A MX 9910820 A MX9910820 A MX 9910820A MX PA99010820 A MXPA99010820 A MX PA99010820A
- Authority
- MX
- Mexico
- Prior art keywords
- weight
- zinc
- alloy
- manganese
- bismuth
- Prior art date
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 15
- 239000010959 steel Substances 0.000 title claims abstract description 15
- 238000005246 galvanizing Methods 0.000 title claims abstract description 7
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 6
- 239000000956 alloy Substances 0.000 title claims abstract description 6
- REDXJYDRNCIFBQ-UHFFFAOYSA-N aluminium(3+) Chemical compound [Al+3] REDXJYDRNCIFBQ-UHFFFAOYSA-N 0.000 title claims abstract 4
- 238000000034 method Methods 0.000 title claims description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 12
- 239000011701 zinc Substances 0.000 claims abstract description 12
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 7
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 6
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 6
- 229910001297 Zn alloy Inorganic materials 0.000 claims abstract description 4
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 4
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 4
- 239000012535 impurity Substances 0.000 claims abstract description 4
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 3
- 229910052718 tin Inorganic materials 0.000 claims description 14
- ATJFFYVFTNAWJD-UHFFFAOYSA-N tin hydride Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 14
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 10
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims description 9
- 229910052797 bismuth Inorganic materials 0.000 claims description 9
- PWHULOQIROXLJO-UHFFFAOYSA-N manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 6
- 239000011572 manganese Substances 0.000 claims description 6
- VYZAMTAEIAYCRO-UHFFFAOYSA-N chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 5
- 239000011651 chromium Substances 0.000 claims description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 5
- 239000011574 phosphorus Substances 0.000 claims description 5
- 229910052698 phosphorus Inorganic materials 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- 239000010703 silicon Substances 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminum Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 3
- 239000011575 calcium Substances 0.000 claims description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 2
- 239000011777 magnesium Substances 0.000 claims description 2
- 229910001335 Galvanized steel Inorganic materials 0.000 claims 1
- 239000008397 galvanized steel Substances 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium(0) Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Abstract
This invention relates to an Sn-containing and/or Bi-containing zinc alloy for hot galvanizing steel, more particularly for component galvanizing.The alloy is composed of 1 to 5%by weight of Sn + Bi, 0 to saturation of Pb, 0.025 to 0.200%by weight of at least one of Ni, Cr or Mn, 0 to 0.030%by weight of at least one of Al, Ca and Mg, the remainder being zinc and unavoidable impurities.
Description
ALLOY AND PROCESS FOR GALVANIZING STEEL
This invention relates to a zinc alloy containing tin (Sn) and / or containing Bismuth (Bi) for the hot galvanization of steel, more particularly for the galvanization of components.
The effect of adding only tin and adding tin and bismuth to a zinc bath is discussed in EP 96200465.1. These additions ensure a delay in the zinc / iron reaction in the case of reactive steels such as steels containing silicon and / or phosphorus. That is why unduly thick layers of zinc are avoided. A relatively high concentration of tin in the bath is, however, necessary and makes the process economically less attractive. In addition, in fairly high concentration of tin there is a risk of formation of a heterogeneous galvanization layer containing tin precipitates.
The effect of vanadium, chromium, nickel and manganese in the zinc / iron reaction in a galvanization bath not containing tin is described in J.J. Sebisty et al., Proceedings of the 8th International Conference on Hot-Dip Galvanizing, London, 1967. These alloys are, however, insufficiently effective for the correct galvanization of steel containing steel phosphorus having high silicon content.
The object of this invention is to limit the concentration in the bath due to the fact that tin is a rather expensive metal, while galvanization is nevertheless correct for phosphorus-containing steel and for steel having a high silicon content. For this purpose, use is made of a zinc alloy containing from 1 to 5% by weight of tin and bismuth, from 0 to lead saturation, from 0.025 to 0.200% by weight of at least one selected from nickel, chromium or manganese, from 0 to 0.030% by weight of at least one selected from aluminum, calcium and magnesium; the rest is zinc and unavoidable impurities.
Depending on the state of the market, it is therefore possible to replace tin partially with bismuth. Lead can be added to saturation. Lead is cheaper than tin and bismuth, but it is less effective and less attractive from an ecological perspective.
As a result of adding tin and bismuth to the zinc bath, the wetting of the steel to be galvanized is improved and the melting point is lowered. This has a plurality of advantages, such as, for example, the possibility of galvanization at lower temperatures, resulting in lower energy consumption and less corrosion of the zinc bath. Short immersion times are also possible, as well as the possibility of applying exceptionally thin layers of zinc.
Examples
These alloys have been tested on several normal types of steel but also on reactive types of steel containing different concentrations of phosphorus and silicon. The table below shows the composition of the types of steel tested.
The following table shows the thickness of the galvanization layer for different compositions of the bath for an immersion time of 5 minutes.
Claims (5)
1. - Hot galvanizing bath consisting of a bismuth-containing zinc alloy, characterized in that it contains from 1 to 5% by weight of tin plus bismuth, from 0 to lead saturation, from 0.025 to 0.200% by weight by weight minus one element selected from nickel, chromium, or manganese, from 0 to 0.030% by weight of at least one element selected from aluminum, calcium and magnesium, the remainder being zinc and unavoidable impurities.
2. Bath according to claim 1, which contains 0.025 to 0.100% by weight of chromium.
3. Bath according to claim 1, which contains 0.025 to 0.200% by weight of manganese.
4. Bath according to claim 1, which contains 0.025 to 0.060% by weight of nickel.
5. - Process for the galvanization of components of steel products which may contain silicon and / or phosphorus, characterized by the use of a zinc bath according to claims 1 to 4. E S U M E N The invention relates to an alloy containing tin and / or bismuth for hot galvanized steel, more particularly for galvanizing components. The alloy is composed of 1 to 5% by weight of Sn + Bi, from 0 to Pb situation, from 0.025 to 0.200% by weight of at least one of nickel, chromium, or manganese, of 0.030 & by weight of at least one of aluminum, calcium and manganese and the rest is zinc and unavoidable impurities.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP97201536.6 | 1997-05-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| MXPA99010820A true MXPA99010820A (en) | 2000-12-06 |
Family
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