US3505042A - Method of hot dip coating with a zinc base alloy containing magnesium and the resulting product - Google Patents
Method of hot dip coating with a zinc base alloy containing magnesium and the resulting product Download PDFInfo
- Publication number
- US3505042A US3505042A US791763*A US3505042DA US3505042A US 3505042 A US3505042 A US 3505042A US 3505042D A US3505042D A US 3505042DA US 3505042 A US3505042 A US 3505042A
- Authority
- US
- United States
- Prior art keywords
- coating
- percent
- bath
- magnesium
- zinc
- 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.)
- Expired - Lifetime
Links
- 229910045601 alloy Inorganic materials 0.000 title description 72
- 239000000956 alloy Substances 0.000 title description 72
- 239000011777 magnesium Substances 0.000 title description 68
- 229910052749 magnesium Inorganic materials 0.000 title description 68
- 239000011701 zinc Substances 0.000 title description 66
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 title description 64
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title description 60
- 229910052725 zinc Inorganic materials 0.000 title description 60
- 238000003618 dip coating Methods 0.000 title description 28
- 238000000034 method Methods 0.000 title description 21
- 238000000576 coating method Methods 0.000 description 95
- 239000011248 coating agent Substances 0.000 description 81
- 229910052751 metal Inorganic materials 0.000 description 29
- 239000002184 metal Substances 0.000 description 29
- 229910052782 aluminium Inorganic materials 0.000 description 21
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 20
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 19
- 230000007797 corrosion Effects 0.000 description 17
- 238000005260 corrosion Methods 0.000 description 17
- 229910001297 Zn alloy Inorganic materials 0.000 description 15
- 230000001590 oxidative effect Effects 0.000 description 14
- 238000012360 testing method Methods 0.000 description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 11
- 229910000831 Steel Inorganic materials 0.000 description 11
- PGTXKIZLOWULDJ-UHFFFAOYSA-N [Mg].[Zn] Chemical compound [Mg].[Zn] PGTXKIZLOWULDJ-UHFFFAOYSA-N 0.000 description 11
- 239000010959 steel Substances 0.000 description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 238000005246 galvanizing Methods 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- 230000001681 protective effect Effects 0.000 description 7
- 229910000765 intermetallic Inorganic materials 0.000 description 6
- 230000002829 reductive effect Effects 0.000 description 6
- 150000003839 salts Chemical class 0.000 description 6
- 238000005275 alloying Methods 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 230000006872 improvement Effects 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 5
- 238000002844 melting Methods 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 229910000635 Spelter Inorganic materials 0.000 description 4
- 238000007792 addition Methods 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000000374 eutectic mixture Substances 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 230000001464 adherent effect Effects 0.000 description 3
- 238000007664 blowing Methods 0.000 description 3
- 238000007654 immersion Methods 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910001335 Galvanized steel Inorganic materials 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000008397 galvanized steel Substances 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000010587 phase diagram Methods 0.000 description 2
- 239000011253 protective coating Substances 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000010301 surface-oxidation reaction Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical group ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002056 binary alloy Inorganic materials 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000008199 coating composition Substances 0.000 description 1
- 238000004320 controlled atmosphere Methods 0.000 description 1
- 239000012809 cooling fluid Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- KFZAUHNPPZCSCR-UHFFFAOYSA-N iron zinc Chemical compound [Fe].[Zn] KFZAUHNPPZCSCR-UHFFFAOYSA-N 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 210000004894 snout Anatomy 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 229960002415 trichloroethylene Drugs 0.000 description 1
- UBOXGVDOUJQMTN-UHFFFAOYSA-N trichloroethylene Natural products ClCC(Cl)Cl UBOXGVDOUJQMTN-UHFFFAOYSA-N 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
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C20/00—Alloys based on cadmium
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12771—Transition metal-base component
- Y10T428/12785—Group IIB metal-base component
- Y10T428/12792—Zn-base component
- Y10T428/12799—Next to Fe-base component [e.g., galvanized]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12771—Transition metal-base component
- Y10T428/12861—Group VIII or IB metal-base component
- Y10T428/12951—Fe-base component
- Y10T428/12972—Containing 0.01-1.7% carbon [i.e., steel]
Definitions
- a ferrous metal sheet hot dip coated with a zinc base alloy containing between about 3 and 5 percent by weight magnesium exhibits very good corrosion resistance against aqueous sodium chloride solutions and good adherence and formability properties.
- the present invention relates generally to an improved method of providing a hot dip zinc base alloy protective coating on a ferrous metal and to a ferrous metal article having an improved protective hot dip zinc base alloy coating.
- Zinc hot dip coatings have long been used to protect ferrous metal bases against attack by corrosion.
- Various alloying metals have been added to a molten zinc bath comprised mainly of zinc to improve the properties of the metal coating or the coating process.
- the alloying metals added to the zinc bath are generally used in an amount ranging upwardly from a fraction of one percent and serve to improve the corrosion resistance or the appearance of the coatings or reduce the amount of intermetallic compounds formed.
- the metals which have heretofore been added to a molten zinc coating bath are lead, tin, aluminum, cadmium, antimony, and magnesium.
- the magnesium concentration in a molten zinc bath which is required to produce a coating having optimum corrosion resistance is from about .04 percent to 0.5 percent by weight magnesium. It has also been reported that the use of magnesium at a concentration substantially above about .05 percent by weight magnesium creates serious operating difiiculties in a molten zinc bath. For example, it has been reported that a hot dip zinc bath containing in excess of about 0.1 percent by weight magnesium results in excess losses due to high flux consumption and large ash build-up on the surface of the bath. (See the paper by John A. Heath, A New Frontier in Hot- Dip Galvanizing: A Magnesium Containing Coating,
- Hot dip zinc base alloy coatings containing up to about 1 percent magnesium have been prepared for testing purposes and found to be less formable than conventional zinc coatings and to severely crack and scale off when subjected to a conventional bend test. Moreover, the addition of magnesium up to about 1 percent by weight to a zinc coating bath was found to have no substantial favorable influence on the corrosion resistance of the resulting zinc alloy coating when exposed to damp air and only a slight favorable improvement in the corrosion resistance when exposed to industrial atmosphere (see Stahl & Eisen, v01. 84, 1964, No. 12, pages 713-8).
- a protective zinc base alloy coating having markedly improved corrosion resistance along with good adherence and ductility properties can be provided on a ferrous metal surface by applying a hot dip zinc base alloy coating having a metallic magnesium content appreciably in excess of the amounts previously considered usable.
- a hot dip zinc base alloy coating having a metallic magnesium content appreciably in excess of the amounts previously considered usable.
- an adherent hot dip coating exhibiting an increase in corrosion resistance of at least about 400 percent over conventional zinc coatings of similar weight Without loss of adherence or ductility has ben obtained by applying in accordance with the present invention a hot dip zinc base alloy coating containing about 3 percent by weight magnesium.
- Table I illustrates the significant improvement obtained where a relatively thin zinc base alloy coating which contains magnesium within the range of concentrations of the 3 present invention and compares therewith a coating of similar thickness made from a standard zinc spelter on a conventional continuous hot dip galvanizing line:
- magnesium-zinc alloys containing between about 1.5 percent magnesium and about 5 percent magnesium have melting points below 800 F. and below the normal operating temperature of a conventional continuous zinc galvanizing bath, and coating with such alloys are within the scope of the present invention.
- magnesium-zinc alloy mixtures containing about 3 percent by weight magnesium i.e. between 2.7 percent and about 3.6 percent magnesium by weight
- magnesium-zinc alloy mixtures containing about 3 percent by weight magnesium have a lower melting point than those having less than 2.7 percent magnesium and greater than 3.6 percent magnesium
- the latter more limited range of magnesiumzinc alloys containing about between 2.7 and 3.6 percent (i.e. about 3%) by weight magnesium are preferred in the present invention.
- the desired operating conditions can be achieved by introducing the clean oxide-free metal base into the coating bath through a tube or snout in which a non-oxidizing or reducing atmosphere is maintained, and thereafter withdrawing the coated metal base from the bath through a chamber or zone having a low oxidizing potential atmosphere from which most of the oxygen of the air is excluded and maintaining the alloy coating in the substantially non-oxidized condition until the temperature falls below the melting point of the alloy (i.e. coating solidifies).
- a zone having a low oxidizing potential of the above type can be provided by applying (i.e.
- metal article having the improved alloy coating of the present invention is not rapidly cooled immediately after withdrawal from the hot dip bath, the surface tends to be irregular and somewhat pitted. These surface defects are substantially reduced by applying a cooling fluid, and preferably a gas which is non-reactive with the coating, such as cool gaseous nitrogen, to the surface of the alloy coating as soon as the article is withdrawn from the coating bath.
- a cooling fluid and preferably a gas which is non-reactive with the coating, such as cool gaseous nitrogen
- a series of 4" x 8" steel test panels were obtained from 20 gauge full hard steel sheets which has a thickness of .034" and chemical compositions of about .04 percent carbon, .29 percent to .35 percent manganese, .01 percent to .011 percent phosphorus, .019 percent to .020 percent sulphur and .04 percent copper, with the balance essentially iron. All the panels were precleaned by the oxidation method according to the following procedures: (1) vapor degreased with trichloro-ethylene for 15 minutes at 170 F., and (2) oxidized in a furnace at 1650 F. for 30 seconds. The oxidized panels were then transferred into the dry box which contained the laboratory galvanizing equipment.
- the atmosphere inside the dry box contained 10 percent hydrogen with the balance nitrogen.
- the dew point inside the dry box was always kept below 15 F. during the dipping operation.
- the cleaned panel was preheated at 1800 F. for 3 minutes in the reducing atmosphere of the dry box during which surface oxides were reduced, and then cooled to the bath temperature for dipping.
- a standard steel hot mill band having a thickness of about 0.080 inch is cold reduced on a five-stand tandem mill to form a steel strip having a thickness of about 0.0236 inch thick (24 gauge).
- the full hard 0.0236 inch strip thus formed having a Rockwell hardness (30 T-scale) of about 80 is cleaned by passing through a continuous cleaning line, followed by conventional box annealing heat treatment to restore the ductility lost when the strip was cold reduced.
- the annealed strip is then temper rolled to provide a suitable surface for continuous hot dip coating.
- the annealed endless steel strip after cleaning as in Example 1 and after being enclosed in a zone having a dry reducing atmosphere of the type used in Example 1 is then immersed in a molten magnesium-zinc alloy bath having the following composition:
- the enclosed strip was fed into the alloy bath at an angle of about 70 to the horizontal.
- the strip was allowed to remain in the alloy bath about 5 seconds (and not more than seconds), and was continuously withdrawn from the bath at an angle of about 90 to the horizontal through coating rolls.
- the coating rolls were flame covered to retard oxide pick-up from the bath.
- the molten alloy coating was rapidly cooled by blowing thereover nitrogen gas at 1.5 p.s.i. and at a temperature below 100" F. and preferably at about 50 F.
- An alloy coating was obtained having a thickness on each side of the strip between about 0.9 mil and 1.3 mils. The latter alloy coating exhibited the improved properties of the coating of Example 1.
- Example 2 An annealed endless steel strip processed as in Example 2 was immersed in a molten bath having a temperature of 750 F. in the same manner as in Example 2, with the bath having following composition:
- the resulting alloy coated strip has the same properties as the strip of Example 2.
- Example 2 An annealed endless steel strip processed as in Example 2 was immersed in a molten zinc base alloy hot dip coating bath having a temperature of 800 F. in the same manner as in Example 2, with the bath having the following composition:
- the resulting alloy coating has the same properties as the coatings in Example 1 and Example 2.
- the top skimming losses were small, despite the higher bath temperature.
- a method of hot dip alloy coating a ferrous metal surface which comprises; immersing a ferrous metal article having a surface thereof substantially free of oxides and substances which contain oxygen into a molten zinc base alloy hot dip coating bath consisting essentially of zinc and containing as an alloying element between about 1.5% and 5% by weight magnesium and withdrawing said article from said bath to form on said surface an adherent protective hot dip zinc base alloy coating.
- said coating bath consists essentially of zinc, magnesium and contains as a further alloying element about 0.05% to 1.0% by weight aluminum.
- a method as in claim 1, comprising blanketing said alloy coating as said article is withdrawn from said coating bath with a protective gaseous atmosphere which is substantially non-oxidizing to said alloy coating.
- An article comprising a ferrous metal sheet having on a surface thereof a corrosion resistant hot dip zinc base alloy coating containing between about 3 percent and 5 percent by weight magnesium with the balance comprised essentially of zinc.
- hot dip alloy coating consists essentially of zinc, magnesium and further contains aluminum in an amount between about 0.15 percent and 0.5 percent by weight.
- An article comprising a ferrous metal sheet having on a surface thereof a corrosion resistance hot dip zinc base alloy coating consisting essentially of zinc and containing as alloying elements between about 1.5 percent and 5 percent by weight magnesium and between about 0.05 percent and 1.0 percent by Weight aluminum, and said coating having good adherence and formability properties.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Coating With Molten Metal (AREA)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US39670764A | 1964-09-15 | 1964-09-15 | |
| US48303265A | 1965-08-27 | 1965-08-27 | |
| US79176369A | 1969-01-16 | 1969-01-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3505042A true US3505042A (en) | 1970-04-07 |
Family
ID=27410228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US791763*A Expired - Lifetime US3505042A (en) | 1964-09-15 | 1969-01-16 | Method of hot dip coating with a zinc base alloy containing magnesium and the resulting product |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US3505042A (enrdf_load_stackoverflow) |
| NL (1) | NL6511999A (enrdf_load_stackoverflow) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2228859A1 (en) * | 1973-05-09 | 1974-12-06 | Centro Speriment Metallurg | Protection of ferrous surfaces using zinc based alloys - also contg. magnesium chromium and aluminium |
| US3993482A (en) * | 1975-01-08 | 1976-11-23 | Dalmine S.P.A. | Anticorrosion zinc based coating material |
| US4056366A (en) * | 1975-12-24 | 1977-11-01 | Inland Steel Company | Zinc-aluminum alloy coating and method of hot-dip coating |
| US4057424A (en) * | 1975-06-13 | 1977-11-08 | Italsider S.P.A. | Zinc-based alloy for coating steel |
| US4330574A (en) * | 1979-04-16 | 1982-05-18 | Armco Inc. | Finishing method for conventional hot dip coating of a ferrous base metal strip with a molten coating metal |
| US4369211A (en) * | 1980-04-25 | 1983-01-18 | Nippon Steel Corporation | Process for producing a hot dip galvanized steel strip |
| US4557953A (en) * | 1984-07-30 | 1985-12-10 | Armco Inc. | Process for controlling snout zinc vapor in a hot dip zinc based coating on a ferrous base metal strip |
| US5002837A (en) * | 1988-07-06 | 1991-03-26 | Kabushiki Kaisha Kobe Seiko Sho | Zn-Mg alloy vapor deposition plated metals of high corrosion resistance, as well as method of producing them |
| US5648177A (en) * | 1995-02-28 | 1997-07-15 | Nisshin Steel Co., Ltd. | Steel sheet coated witn Zn-Mg binary coating layer excellent in corrosion resistance and manufacturing method thereof |
| EP1193323A4 (en) * | 2000-02-29 | 2003-07-16 | Nippon Steel Corp | PLATED STEEL PRODUCTS WITH HIGH CORROSION RESISTANCE AND EXCELLENT FORMABILITY AND PRODUCTION PROCESS FOR SUCH A PRODUCT |
| WO2009049836A1 (de) * | 2007-10-10 | 2009-04-23 | Voestalpine Stahl Gmbh | Korrosionsschutzbeschichtung mit verbesserter haftung |
| WO2023134665A1 (zh) | 2022-01-11 | 2023-07-20 | 宝山钢铁股份有限公司 | 一种具有Al-Zn-Mg-Si镀层的热冲压钢板及其热冲压方法 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3164464A (en) * | 1961-01-09 | 1965-01-05 | Dow Chemical Co | Method of introducing magnesium into galvanizing baths |
| US3245765A (en) * | 1962-03-08 | 1966-04-12 | Armco Steel Corp | Process of improving general corrosion resistance of zinc coated strip |
| US3320040A (en) * | 1963-08-01 | 1967-05-16 | American Smelting Refining | Galvanized ferrous article |
-
1965
- 1965-09-15 NL NL6511999A patent/NL6511999A/xx unknown
-
1969
- 1969-01-16 US US791763*A patent/US3505042A/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3164464A (en) * | 1961-01-09 | 1965-01-05 | Dow Chemical Co | Method of introducing magnesium into galvanizing baths |
| US3245765A (en) * | 1962-03-08 | 1966-04-12 | Armco Steel Corp | Process of improving general corrosion resistance of zinc coated strip |
| US3320040A (en) * | 1963-08-01 | 1967-05-16 | American Smelting Refining | Galvanized ferrous article |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2228859A1 (en) * | 1973-05-09 | 1974-12-06 | Centro Speriment Metallurg | Protection of ferrous surfaces using zinc based alloys - also contg. magnesium chromium and aluminium |
| US3993482A (en) * | 1975-01-08 | 1976-11-23 | Dalmine S.P.A. | Anticorrosion zinc based coating material |
| US4057424A (en) * | 1975-06-13 | 1977-11-08 | Italsider S.P.A. | Zinc-based alloy for coating steel |
| US4056366A (en) * | 1975-12-24 | 1977-11-01 | Inland Steel Company | Zinc-aluminum alloy coating and method of hot-dip coating |
| US4330574A (en) * | 1979-04-16 | 1982-05-18 | Armco Inc. | Finishing method for conventional hot dip coating of a ferrous base metal strip with a molten coating metal |
| US4369211A (en) * | 1980-04-25 | 1983-01-18 | Nippon Steel Corporation | Process for producing a hot dip galvanized steel strip |
| US4557953A (en) * | 1984-07-30 | 1985-12-10 | Armco Inc. | Process for controlling snout zinc vapor in a hot dip zinc based coating on a ferrous base metal strip |
| US5002837A (en) * | 1988-07-06 | 1991-03-26 | Kabushiki Kaisha Kobe Seiko Sho | Zn-Mg alloy vapor deposition plated metals of high corrosion resistance, as well as method of producing them |
| US5648177A (en) * | 1995-02-28 | 1997-07-15 | Nisshin Steel Co., Ltd. | Steel sheet coated witn Zn-Mg binary coating layer excellent in corrosion resistance and manufacturing method thereof |
| EP1193323A4 (en) * | 2000-02-29 | 2003-07-16 | Nippon Steel Corp | PLATED STEEL PRODUCTS WITH HIGH CORROSION RESISTANCE AND EXCELLENT FORMABILITY AND PRODUCTION PROCESS FOR SUCH A PRODUCT |
| US6610423B2 (en) | 2000-02-29 | 2003-08-26 | Nippon Steel Corporation | Plated steel product having high corrosion resistance and excellent formability and method for production thereof |
| WO2009049836A1 (de) * | 2007-10-10 | 2009-04-23 | Voestalpine Stahl Gmbh | Korrosionsschutzbeschichtung mit verbesserter haftung |
| WO2023134665A1 (zh) | 2022-01-11 | 2023-07-20 | 宝山钢铁股份有限公司 | 一种具有Al-Zn-Mg-Si镀层的热冲压钢板及其热冲压方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| NL6511999A (enrdf_load_stackoverflow) | 1966-03-16 |
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