GB2080833A - Coating with Zn/Al alloy by hot dipping - Google Patents
Coating with Zn/Al alloy by hot dipping Download PDFInfo
- Publication number
- GB2080833A GB2080833A GB8121202A GB8121202A GB2080833A GB 2080833 A GB2080833 A GB 2080833A GB 8121202 A GB8121202 A GB 8121202A GB 8121202 A GB8121202 A GB 8121202A GB 2080833 A GB2080833 A GB 2080833A
- Authority
- GB
- United Kingdom
- Prior art keywords
- zinc
- bath
- alloy
- coating
- metal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000000576 coating method Methods 0.000 title claims abstract description 29
- 239000011248 coating agent Substances 0.000 title claims abstract description 25
- 229910001297 Zn alloy Inorganic materials 0.000 title description 3
- 229910000838 Al alloy Inorganic materials 0.000 title description 2
- 238000007598 dipping method Methods 0.000 title description 2
- 239000011701 zinc Substances 0.000 claims abstract description 45
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 42
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 41
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 24
- 239000000956 alloy Substances 0.000 claims abstract description 24
- 229910052751 metal Inorganic materials 0.000 claims abstract description 21
- 239000002184 metal Substances 0.000 claims abstract description 21
- 238000007654 immersion Methods 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 9
- 238000001035 drying Methods 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 24
- 238000000137 annealing Methods 0.000 claims description 6
- 150000003839 salts Chemical class 0.000 claims description 5
- 229910052752 metalloid Inorganic materials 0.000 claims description 4
- 150000002738 metalloids Chemical class 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 229910000611 Zinc aluminium Inorganic materials 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 230000003247 decreasing effect Effects 0.000 claims 2
- HXFVOUUOTHJFPX-UHFFFAOYSA-N alumane;zinc Chemical compound [AlH3].[Zn] HXFVOUUOTHJFPX-UHFFFAOYSA-N 0.000 claims 1
- 238000005246 galvanizing Methods 0.000 abstract 1
- 238000001465 metallisation Methods 0.000 description 17
- 230000008569 process Effects 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 239000004411 aluminium Substances 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 238000011282 treatment Methods 0.000 description 4
- 229910007570 Zn-Al Inorganic materials 0.000 description 3
- 238000005238 degreasing Methods 0.000 description 3
- 238000000151 deposition Methods 0.000 description 3
- 230000008021 deposition Effects 0.000 description 3
- 239000011777 magnesium Substances 0.000 description 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000005554 pickling Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000005491 wire drawing Methods 0.000 description 2
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 description 2
- 229910018125 Al-Si Inorganic materials 0.000 description 1
- 229910018520 Al—Si Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004532 chromating Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- -1 for example Chemical class 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000011592 zinc chloride Substances 0.000 description 1
- 235000005074 zinc chloride Nutrition 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/12—Aluminium or alloys based thereon
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating With Molten Metal (AREA)
Abstract
In order to improve the quality of an alloy e.g. Zn/Al coating formed by immersion in a liquid bath of the alloy, the metal object to be coated is first immersed in a liquid bath of zinc. There is thus no need for special pretreatment other than that conventionally provided before galvanizing. The Zn/Al bath may be maintained at approx. 600 DEG C and may further include Mg and/or Si. Forced drying may be provided after each bath. <IMAGE>
Description
SPECIFICATION
Hot metallization
The present invention relates to a method of applying a metal coating by hot metallization, particularly by deposition of a zinc-based coating containing aluminium and preferably other light metalloids and metais, such as silicon and magnesium, as well as to an apparatus for carrying this method.
It has been known for a long time to protect metal surfaces against corrosion with zinc or zinc alloy coatings which are deposited by hot metallization (hot dipping).
The conventional procedure of galvanization consists in immersing the metal object to be galvanized in a bath of zinc or an alloy thereof, and this after having effected a certain number of preliminary treatments so as to impart to the metal surface or surfaces to be treated the properties which ensure the obtaining of a coating having good quality.
These treatments are degreasing and pickling steps carried out by immersion in solution of a mineral acid containing corrosion inhibitors.
Thereafter the metal object is treated by fluxing so as to deposit a thin film of salts such as, for example, ammonium chloride or zinc chloride.
The zinc coating is considered satisfactory if it has a shiny and smooth aspect and if its adherence to the metal substrate is sufficient.
Research conducted with a view to improving resistance to corrosion has shown that coatings composed of zinc and aluminium alloys with an aluminium content in the range of 25 to 70 wt.% exhibit a resistance to corrosion which is far superior to that provided by zinc alone.
In addition, it has been found that increasing aluminium contents necessitate a pretreatment of the surface which is much more extensive than in the case of zinc alone. Thus, minor contaminants which can be tolerated in the case of a zinc coating produce in the case of a Zn-Al alloy inacceptable surface defects such as blistering, decohesion, and bare spots.
This finding has compelled the constructors of industrial production lines of Zn-Al coatings to improve the performance of the apparatuses for the pretreatment of the surface by degreasing, annealing, and other processes.
With respect to batch galvanization, which usually involves extensive use of fluxing, it has been hitherto impossible to find a flux which is sufficiently active to ensure the obtaining of a sufficiently clean surface in the case of coatings having high contents of aluminium.
The present invention provides a method wherein the surface of the object to be metallized (which need only be subjected to conventional pretreatment processes ensuring a coating of sufficient adherence in the context of conventional galvanization with zinc alone, which pretreatment processes comprise salt fluxing in the case of bath metallization and annealing in the case of continuous metallization) is subjected first to immersion in a liquid bath of zinc and then to immersion in a liquid bath of the alloy intended to form the final coating.
In a preferred process the surface of the object to be metallized is first subjected to a pretreatment comprising salt fluxing or annealing so as to facilitate adhesion of zinc, the pretreated surface is immersed in a zinc bath at about 450"C, the zinc coating thus formed is subjected to forced drying, and the said surface is then immersed in a bath of a zincaluminium alloy (preferably containing at least one light metal or metalloid) at about 600"C.
The gist of this process resides in inserting a special treatment phase, which consists in a conventional hot galvanization step using zinc, between the pretreatment of the object to be metallized and the metallization phase as such.
Indeed, since the deposition of an initial coating of zinc alone is followed by the deposition of a final coating which is effected at a temperature higher by about 1 50 C, the initial coating plays generally speaking the role of a flux. It constitutes an effective shield against any oxidation of the surface of the object.
Once introduced in the final bath containing
Zn-Al alloy at a temperature considerably higher than the melting point of zinc, the initial zinc coating rapidly disappears by fusion and a thoroughly clean surface is available to receive the desired final coating.
It is of course understood that one must take into account the fact that the zinc content in the final bath increases progressively. Preferably one should continuously add to this bath a quality of the other alloying element(s) corresponding to the excess of zinc, so that the bath composition is kept substantially constant.
It is advantageous to provide between the initial and final metallization immersions a powerful drying phase, the purpose of which is to limit the formation of intermetallic layers which are undesirable in the context of the present invention. Along the same lines, it is important to ensure that the transfer from the initial immersion to the final immersion takes place in the minimum time; rapid transfer also favours a reduction in the heat energy required for carrying out the process.
It has been found useful to set the duration of the initial and final metallization immersions according to the zinc contant of the final bath, the duration of the initial immersion being longer if the zinc content of the final bath is lower, and vice versa.
Besides the inherent advantages of the method according to the invention with re spect to the quality of the coating obtained, it is worthwhile mentioning that the method is characterized by its extensive flexibility. Indeed, it is possible to carry out working phases which take place according to the invention, that is, to proceed to metallization with the alloys Zn-AI-Mg and Zn-Al-Si or other alloys, and to change on a short term basis so as to proceed, if need be, to metallizations with pure zinc. This change does not involve any problem of a technological order, since it amounts to utilizing only the vessel containing the initial bath of pure zinc.
The above-described method may be carried out with apparatus comprising two vessels the first of which contains a bath of zinc whereas the second contains a bath of alloy, the two vessels being provided with heating means, temperature regulating means, and metal feeding means, as well as with means permitting objects to be continuousiy successively through the first and second vessels.
It is also possible to install, at the exit of the first vessel, means permitting the product to be diverted at the end of the initial immersion.
Whether one proceeds to a conventional metallization with zinc only, effected only in the first vessel, or to metallization with an alloy, it is preferable that at least the first vessel comprises means for establishing an appropriate residence time of the object in the metallization bath.
The invention will be described further, by way of example, with reference to the accompanying drawings, in which Figs. 1 and 2 diagrammatically illustrate two different types of hot metallization apparatus.
Batch metallization, as may be applied in the tubing, wire-drawing, or bolt-and-nut industries, is illustrated in Fig. 1. A steel object is subjected to the conventional pretreatment steps of degreasing, pickling, and rinsing, followed by salt fluxing in an aquaeous solution which is also conventional. Then takes place an initial immersion in a zinc bath at about'450 C, followed by a final immersion in a Zn + Al + X bath (X being at least one light metal or metalloid such as Mg and/or Si) at a temperature (about 600"C) chosen according to the nature and concentration of X. As is apparent from Fig. 1, by diverting the product after the initial immersion (as indicated in chain-dotted line) it is possible to carry out with the same apparatus a conventional galvanization step using zinc only.
Fig. 2 shows continuous metallization, as may be applied, for example, in the tubing, wire-drawing, or sheet metal industries. Here the pretreatment steps can be reduced to an annealing step. At the exit of the annealing furnace the product (e.g. steel tube) is protected against oxidation by means of a duct flushed with an inert gas; the two vessels are each provided with a forced drying device above the liquid bath. In this apparatus it is possible, as in the case of batch metallization, to carry out a conventional galvanization with zinc only by diverting the product as indicated in chain-dotted line. The coated product is subjected to subsequent treatment such as chromating or planing.
An important application of the present invention resides, for example, in producing tubes coated with a Zn-AI alloy, which exhibit a better resistance to corrosion by hot water than simple galvanized tubes.
Claims (17)
1. A method of applying a metal coating to a metal surface, comprising the sequential steps of immersing the said surface in a liquid bath of zinc, removing the said surface from the zinc bath together with a coating of zinc, immersing the said surface in a liquid bath of an alloy, and removing the said surface from the alloy bath together with a coating of the alloy.
2. A method as claimed in claim 1, in which the zinc bath is at a temperature of about 450"C.
3. A method as claimed in claim 1 or 2, in which the zinc coating is subjected to forced drying.
4. A method as claimed in any preceding claim, in which the alloy bath is at a tempera ture of about 600"C.
5. A method as claimed in any preceding claim, in which the alloy contains zinc.
6. A method as claimed in claim 5, in which the alloy is a zinc-aluminium alloy.
7. A method as claimed in claim 6, in which the alloy contains a light metal or metalloid.
8. A method as claimed in any of claims 5 to 7, in which the zinc coating dissolves at least partly in the alloy bath, this bath being fed with the other component(s) of the alloy so that the composition of this bath remains substantially constant.
9. A method as claimed in any of claims 5 to 8, including increasing or decreasing the zinc content of the alloy bath and, respectively, decreasing or increasing the duration of the immersion in the zinc bath.
10. A method as claimed in any preceding claim, including salt fluxing or annealing the said surface before immersion in the zinc bath, so as to facilitate adhesion of the zinc.
11. Apparatus for applying a metal coating to a metal surface of an object, comprising a first vessel containing a liquid bath of zinc, a second vessel containing a liquid bath of an alloy, and transport means for conveying the object successively through the first and second vessels in such a manner that the said surface is temporarily immersed in each bath.
1 2. Apparatus as claimed in claim 11, including means for diverting the object away from the second vessel after it has been conveyed through the first vessel.
1 3. Apparatus as claimed in claim 11 or 12, in which at least the first vessel is provided with means for regulating the duration of immersion.
14. Apparatus as claimed in any of claims 11 to 13, in which the vessels are provided with temperature regulating means and metal feeding means.
1 5. Apparatus as claimed in any of claims 11 to 14, including means for forcibly drying the zinc coating carried by the said surface as it leaves the first vessel.
1 6. A method of applying a metal coating to a metal surface, substantially as described with reference to Figure 1 or Figure 2 of the accompanying drawings.
17. Apparatus for applying a metal coating to a metal surface, substantially as described with reference to, and as shown in,
Fig. 1 or Fig. 2 of the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| LU82598A LU82598A1 (en) | 1980-07-09 | 1980-07-09 | PROCESS AND PLANT FOR HOT METALLIZATION OF METAL OBJECTS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB2080833A true GB2080833A (en) | 1982-02-10 |
Family
ID=19729434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8121202A Withdrawn GB2080833A (en) | 1980-07-09 | 1981-07-09 | Coating with Zn/Al alloy by hot dipping |
Country Status (11)
| Country | Link |
|---|---|
| JP (1) | JPS5747859A (en) |
| AU (1) | AU7264381A (en) |
| BE (1) | BE889538A (en) |
| BR (1) | BR8104178A (en) |
| DE (1) | DE3124161A1 (en) |
| FR (1) | FR2486542A1 (en) |
| GB (1) | GB2080833A (en) |
| IT (1) | IT1138817B (en) |
| LU (1) | LU82598A1 (en) |
| NL (1) | NL8103006A (en) |
| SE (1) | SE8104217L (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0106021A2 (en) * | 1982-06-23 | 1984-04-25 | Bethlehem Steel Corporation | Ferrous product having an alloy coating thereon of aluminium-zinc-magnesium-silicon, and method |
| US5141781A (en) * | 1988-04-14 | 1992-08-25 | Nippon Galvanizing Co., Ltd. | High adhesion molten aluminum-zinc alloy plating process |
| US5512321A (en) * | 1992-03-13 | 1996-04-30 | Mannesmann Aktiengesellschaft | Process for coating elongated materials with multiple layers |
| WO2001011100A1 (en) * | 1999-08-09 | 2001-02-15 | Nippon Steel Corporation | Zn-Al-Mg-Si ALLOY PLATED STEEL PRODUCT HAVING EXCELLENT CORROSION RESISTANCE AND METHOD FOR PREPARING THE SAME |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2548216B1 (en) * | 1983-06-28 | 1988-10-21 | Fical Fils Cables Acier Lens | STEEL WIRE WITH CORROSION RESISTANT COATINGS |
| JPS6199664A (en) * | 1984-10-19 | 1986-05-17 | Kobe Steel Ltd | Coating method with zinc-aluminum alloy by hot dipping |
| JPS6428350A (en) * | 1987-07-24 | 1989-01-30 | Taiyo Seiko Kk | Hot dip aluminum alloy coated steel sheet and its production |
| DE3828911C1 (en) * | 1988-08-26 | 1989-02-09 | Solms, Juergen, Dipl.-Ing., 5912 Hilchenbach, De | Process for the hot metallisation of piece goods |
| RU2237743C2 (en) | 2002-09-26 | 2004-10-10 | Закрытое акционерное общество "Межотраслевое юридическое агентство "Юрпромконсалтинг" | Method for processing of surface of elongated article, line and apparatus for effectuating the same |
-
1980
- 1980-07-09 LU LU82598A patent/LU82598A1/en unknown
-
1981
- 1981-06-19 FR FR8112108A patent/FR2486542A1/en active Pending
- 1981-06-19 DE DE19813124161 patent/DE3124161A1/en not_active Withdrawn
- 1981-06-22 NL NL8103006A patent/NL8103006A/en not_active Application Discontinuation
- 1981-06-23 IT IT22528/81A patent/IT1138817B/en active
- 1981-06-30 BR BR8104178A patent/BR8104178A/en unknown
- 1981-07-07 SE SE8104217A patent/SE8104217L/en not_active Application Discontinuation
- 1981-07-07 BE BE6/47491A patent/BE889538A/en unknown
- 1981-07-07 JP JP56105176A patent/JPS5747859A/en active Pending
- 1981-07-08 AU AU72643/81A patent/AU7264381A/en not_active Abandoned
- 1981-07-09 GB GB8121202A patent/GB2080833A/en not_active Withdrawn
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0106021A2 (en) * | 1982-06-23 | 1984-04-25 | Bethlehem Steel Corporation | Ferrous product having an alloy coating thereon of aluminium-zinc-magnesium-silicon, and method |
| EP0106021A3 (en) * | 1982-06-23 | 1984-09-12 | Bethlehem Steel Corporation | Ferrous product having an alloy coating thereon of aluminium-zinc-magnesium-silicon, and method |
| US5141781A (en) * | 1988-04-14 | 1992-08-25 | Nippon Galvanizing Co., Ltd. | High adhesion molten aluminum-zinc alloy plating process |
| US5512321A (en) * | 1992-03-13 | 1996-04-30 | Mannesmann Aktiengesellschaft | Process for coating elongated materials with multiple layers |
| AU674304B2 (en) * | 1992-03-13 | 1996-12-19 | I.P. Bardin Central Research Institute Of Iron And Steel Industry | Process for coating elongated materials with multiple layers |
| WO2001011100A1 (en) * | 1999-08-09 | 2001-02-15 | Nippon Steel Corporation | Zn-Al-Mg-Si ALLOY PLATED STEEL PRODUCT HAVING EXCELLENT CORROSION RESISTANCE AND METHOD FOR PREPARING THE SAME |
| EP1225246A1 (en) * | 1999-08-09 | 2002-07-24 | Nippon Steel Corporation | Zn-Al-Mg-Si ALLOY PLATED STEEL PRODUCT HAVING EXCELLENT CORROSION RESISTANCE AND METHOD FOR PREPARING THE SAME |
| AU763740B2 (en) * | 1999-08-09 | 2003-07-31 | Nippon Steel & Sumikin Coated Sheet Corporation | Zn-Al-Mg-Si alloy-plated steel product having excellent corrosion resistance and method for preparing the same |
| US6635359B1 (en) | 1999-08-09 | 2003-10-21 | Nippon Steel Corporation | Zn-Al-Mg-Si-alloy plated steel product having excellent corrosion resistance and method for preparing the same |
| EP1225246A4 (en) * | 1999-08-09 | 2005-02-09 | Nippon Steel Corp | Zn-Al-Mg-Si ALLOY PLATED STEEL PRODUCT HAVING EXCELLENT CORROSION RESISTANCE AND METHOD FOR PREPARING THE SAME |
| CN100334250C (en) * | 1999-08-09 | 2007-08-29 | 新日本制铁株式会社 | Zn-Al-Mg-Si alloy plated steel product having excellent corrosion resistance and method for preparing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| BE889538A (en) | 1981-11-03 |
| SE8104217L (en) | 1982-01-10 |
| FR2486542A1 (en) | 1982-01-15 |
| IT1138817B (en) | 1986-09-17 |
| DE3124161A1 (en) | 1982-03-04 |
| AU7264381A (en) | 1982-01-14 |
| BR8104178A (en) | 1982-03-16 |
| NL8103006A (en) | 1982-02-01 |
| JPS5747859A (en) | 1982-03-18 |
| IT8122528A0 (en) | 1981-06-23 |
| LU82598A1 (en) | 1982-02-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3770875B2 (en) | Flux and method for hot dip galvanizing | |
| GB2099857A (en) | A method of hot dip galvanizing metallic articles | |
| ZA931518B (en) | Multi-layer metal tube and method for its manufacture. | |
| CA3015540C (en) | Hot-dip galvanization system and hot-dip galvanization method in particular for large-scale (high-volume) production | |
| US4675214A (en) | Hot dip aluminum coated chromium alloy steel | |
| US4883723A (en) | Hot dip aluminum coated chromium alloy steel | |
| GB2080833A (en) | Coating with Zn/Al alloy by hot dipping | |
| US20190048452A1 (en) | Hot-dip galvanization system and hot-dip galvanization method | |
| US6200636B1 (en) | Fluxing process for galvanization of steel | |
| US3730758A (en) | Method of protecting ferrous strip in hot-dip processes | |
| US6372296B2 (en) | High aluminum galvanized steel | |
| GB2229452A (en) | Preparing metal for melt-coating | |
| US4150179A (en) | Hot dip aluminizing of steel strip | |
| US4800135A (en) | Hot dip aluminum coated chromium alloy steel | |
| JPH04214848A (en) | Hot-dip galvanized coating material and method for hot-dip galvanizing | |
| JPH08269662A (en) | Production of zinc-tin alloy coated steel sheet | |
| JPS58110665A (en) | Production of galvanized steel plate | |
| CN110923603A (en) | High-heat-resistance hot-dip aluminum-zinc plated steel plate and production method thereof | |
| JPH04176852A (en) | Aluminum-zinc alloy hot-dipping method | |
| JPH0472047A (en) | Aluminum/zinc alloy hot-dip coated material and aluminum/zinc alloy hot-dip coating method | |
| JP2004066265A (en) | Method for manufacturing metal plated steel tube | |
| WO1997035041A1 (en) | A fluxless hot dip galvanizing process | |
| JPH04154949A (en) | Production of zn-al alloy plated steel wire | |
| PL197163B1 (en) | Method for producing a steel strip which is provided with a zinc coating and zinc−coated steel strip | |
| JP2000256825A (en) | Sliding member for zinc-aluminum hot-dip bath |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |