US3708322A - Method of producing a coated ferrous substrate - Google Patents
Method of producing a coated ferrous substrate Download PDFInfo
- Publication number
- US3708322A US3708322A US00077585A US3708322DA US3708322A US 3708322 A US3708322 A US 3708322A US 00077585 A US00077585 A US 00077585A US 3708322D A US3708322D A US 3708322DA US 3708322 A US3708322 A US 3708322A
- Authority
- US
- United States
- Prior art keywords
- coatant
- strip
- particles
- supply
- substrate
- 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
- 239000000758 substrate Substances 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 33
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 title abstract description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 49
- 239000002245 particle Substances 0.000 claims abstract description 34
- 229910052742 iron Inorganic materials 0.000 claims abstract description 24
- 238000007711 solidification Methods 0.000 abstract description 9
- 230000008023 solidification Effects 0.000 abstract description 9
- 229910045601 alloy Inorganic materials 0.000 abstract description 8
- 239000000956 alloy Substances 0.000 abstract description 8
- 238000003466 welding Methods 0.000 abstract description 6
- 230000000717 retained effect Effects 0.000 abstract description 5
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 16
- 229910052725 zinc Inorganic materials 0.000 description 16
- 239000011701 zinc Substances 0.000 description 16
- 239000000843 powder Substances 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000005246 galvanizing Methods 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 229910001335 Galvanized steel Inorganic materials 0.000 description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 210000003298 dental enamel Anatomy 0.000 description 2
- 239000008397 galvanized steel Substances 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 229910000676 Si alloy Inorganic materials 0.000 description 1
- 229910000870 Weathering steel Inorganic materials 0.000 description 1
- 229910000611 Zinc aluminium Inorganic materials 0.000 description 1
- HXFVOUUOTHJFPX-UHFFFAOYSA-N alumane;zinc Chemical compound [AlH3].[Zn] HXFVOUUOTHJFPX-UHFFFAOYSA-N 0.000 description 1
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 1
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 229960002089 ferrous chloride Drugs 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 150000002506 iron compounds Chemical class 0.000 description 1
- NMCUIPGRVMDVDB-UHFFFAOYSA-L iron dichloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
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
- C23C2/26—After-treatment
- C23C2/265—After-treatment by applying solid particles to the molten coating
-
- 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
- Y10T428/12014—All metal or with adjacent metals having metal particles
- Y10T428/12028—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, etc.]
- Y10T428/12063—Nonparticulate metal component
- Y10T428/12104—Particles discontinuous
- Y10T428/12111—Separated by nonmetal matrix or binder [e.g., welding electrode, etc.]
- Y10T428/12125—Nonparticulate component has Fe-base
- Y10T428/12132—Next to Fe-containing particles
-
- 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.]
- Y10T428/12736—Al-base component
- Y10T428/1275—Next to Group VIII or IB metal-base component
- Y10T428/12757—Fe
Definitions
- the invention concerns a method of producing a coated ferrous substrate having improved spot welding characteristics comprising introducing a ferrous substrate into a bath of molten metallic coatant so as to coat the substrate therewith, withdrawing the coated substrate from the bath, and thereafter directing particles of metallic iron or iron-based alloy onto the coated substrate, before the molten coatant thereon solidifies, so that the particles are retained adjacent the surface of the coatant during solidification of the latter.
- a method of producing a coated ferrous substrate having improved spot welding characteristics comprising introducing a ferrous substrate into a bath of molten metallic coatant so as to coat the substrate therewith, withdrawing the coated substrate from the bath, and thereafter directing particles of metallic iron or iron-based alloy onto the coated substrate, before the molten coatant thereon solidifies,
- metallic iron is to be understood as exeluding iron compounds.
- one particular hot dip galvanized steel produced by the method of the present invention metallic iron powder being used, had an electrode life of about 15,000 spot welds,.by comparison with an electrode life of 1,500 spot welds in the case of a similar hot dip galvanised steel produced by a conventional process.
- an even higher electrode life is obtainable if, after the molten coatant has solidified, an outermost layer of metallic iron is deposited onto, without being diffused into, the coatent.
- the conventional process of hot dip galvanizing moreover, produces a product having a spangled surface which may be visible even when coated,
- a galvanised steel product e.g., a refrigerator, washing machine, shelving, or a motor car
- the existence of the Spangled surface is undesirable since its contours can be seen in the enamel.
- the method of the present invention may, however, be so operated as to overcome this problem.
- the.saicl particles are directed onto the coated substrate so as to reach the latter at a velocity not exceeding 500 feet per minute, since at higher speeds the particles may bounce off the coated substrate, thus reducing weldability.
- the quantity of particles directed onto each square foot of the surface of the coated substrate is in the range of l to 3 grams.
- a second supply of the said particles may be directed onto the coated substrate after the application thereto of the first supply thereof but before the molten coatant solidifies, the said second supply being smaller in quantity than the first supply and being directed onto the coated substrate so as to reach the latter at a velocity greater than that of the first supply.
- This is desirable in cases where the substrate is thick (e.g., greater than 0.048 inch in thickness) to ensure that the coatant does not remain molten after the application of the said particles, since otherwise some spangles may form. It is believed that the powdered metallic iron or iron alloy creates nuclei on which the zinc or other coatant will solidify.
- the said particles may be formed from pure iron, a mild steel, or an iron based alloy such as one having percent iron and 20 percent zinc.
- the substrate is preferably a metallic strip which is continuously moved through the bath.
- the excess molten coatant on the metallic strip may be removed by passing the latter through the nip of a pair of rolls. Alternatively, the excess molten coatant may be blown back, by a controlled blast of air, into the bath.
- the strip may be of a low alloy steel e g., that sold under the Trade Mark CORTEN which contains a small amount of copper and chromium.
- the molten coatant is preferably zinc and in this case the particles are preferably directed onto the molten zinc when the temperature of the latter is in the range 440 to 450 C.
- the method of the present invention is also applicable to the provision of a mild steel strip with an aluminum or aluminum alloy coatant, e.g., a zinc-aluminum alloy coatant, an aluminum-magnesium alloy coatant, or an aluminum-silicon alloy coatant.
- an aluminum or aluminum alloy coatant e.g., a zinc-aluminum alloy coatant, an aluminum-magnesium alloy coatant, or an aluminum-silicon alloy coatant.
- the size of the said particles is not normally of great importance, but it is preferred that they should be not greater than 200 mesh in size.
- the equipment employed to direct the said particles onto the coated strip should be movable to take account of the gauge of the strip.
- the said equipment should be capable of being moved up or down to take account of the varying position of the solidification zone of the coatant. That is to say, a light gauge strip cools more quickly than a heavier gauge strip, and the solidification zone of the coatant is therefore nearer to the bath in The case of the light gauge strip than it is in the case of the heavier gauge strip. Consequently, the lighter the gauge of the strip being used, the nearer the said equipment needs to be disposed to the bath.
- FIG. 1 is a schematic elevation of a hot dip galvanizing plant for use in the method of the present invention.
- FIG. 2 is a section through a galvanized steel strip produced by the method of the present invention.
- FIG. 1 there is shown a hot dip galvanizing plant having an entry zone 10, a surface preparation zone it, a coating zone 12, and a delivery zone 13.
- a de-coiler 14 mounted in the entry zone 10 is a de-coiler 14 from which a steel strip 15 may be de-coiled.
- the strip 15 is moved con tinuously through the surface preparation zone 1 1 so as to pass successively therein through an apparatus 16 in which the strip 15 is subjected to a grease burn at about 400 C, and then through an apparatus 17 in which the strip is heated in a reducing atmosphere at about 700 C.
- the strip 15 then passes over a roller 20 and then vertically downwards so as to pass around a roller 21 in a bath 22 which is disposed in the coating zone 12, the bath 22 containing molten zinc.
- the strip 15 after having been thus coated with a layer 23 (FIG. 2) of molten zinc, as a result of its introduction into the bath 22, then passes upwardly through the nip of a pair of rolls 24 by means of which excess molten zinc is removed, after which it passes through powder applicator equipment 25.
- the powder applicator equipment 25 comprises a pair of bottom applicators 26 and a pair of top applicators 27, each pair of applicators consisting of two powder applicators arranged on vertically opposite sides of the strip 15.
- the bottom and top applicators 26, 27 are respectively provided with supply conduits 30, 31 through which metallic iron or iron-based alloy particles 32, (see FIG. 2) whose melting point is above 450 C and whose size is preferably not greater than 200 mesh, may be carried in a stream of air (or other gas) towards the. zinc coating on the strip 15.
- the particles'32 supplied by the bottom applicators 26 reach the coated strip at a velocity in the range 300 to 500 feet per minute, while the quantity of the particles 32 directed from the bottom applicators 26 into each square foot of each surface of the strip is in the range 1 to 3 grams.
- the particles 32 are directed onto the layer 23 of molten zinc before the latter solidifies so that the particles are retained at or near the surface 33 of the layer 23 of zinc coatant during solidification of the latter.
- the use of the particles 32 from the bottom applicators 26 very substantially improves the electrode life of the product and, moreover, except in the case of heavy gauge steel strip, i.e., of a thickness exceeding 0.048 inch, gives the strip a matte, spanglefree surface.
- the top applicators 27 are provided with a second supply of particles 32 which reach the molten zinc on the strip at a velocity in the range of 500 to 1000 feet per minute, the amount of the second supply which is directed onto each surface of the zinc coatant prior to solidification of the latter being in the range of 0.1 to 0.2 grams per square foot.
- the low velocity of the air from the bottom applicators 26 is insufficient, in the case of a heavy gaugestrip having a high heat content, to cool the latter below the zinc recrystallization temperature and therefore insufficient to suppress spangles completely.
- the application of the small quantity of particles 32 from the top applicators 27, which produce a high air velocity, will suppress the spangles and produce a matte surface.
- the powder applicator equipment 25 is, as indicated by arrows 34, movable longitudinally of the strip 15 towards and away from the bath 22 so that it may be positioned below the solidification zone of the zinc, and preferably in the region where the temperature of the latter is in the range 440 to 450 C. Excess powder is withdrawn from the powder applicator equipment 25 by a pump 35, whereby the excess powder is recovered.
- the strip 15 may have its weldability still further improved by providing it with an outermost layer 40 (FIG. 2) of metallic iron.
- the layer 40 may be applied electrolytically but is preferably an immersion deposit of iron which fills in' the gap between the particles 32.
- This immersion deposit may, for example, be produced by dipping the strip, for 5 seconds, in a solution of ferrous chloride which is maintained at 40 C, has a pH of 2.2, and contains 56 grams/litre of iron, the strip being thereafter washed and dried. It was found that the layer 40 raised the electrode life of the strip from 15,000 to 17,000 spot welds, and that this layer 40, in spite of its being a layer of metallic iron, had excellent corrosion resistance.
- a method of producing a coated ferrous substrate having improved spot welding characteristics comprising introducing a ferrous substrate into a bath of molten zinc, aluminum, or aluminum alloy coatant so as to coat the substrate therewith, withdrawing the coated substrate from the bath, and thereafter directing particles of metallic iron or iron-based alloy having a mesh size not'exceeding 200 mesh onto the coated substrate,
- the said particles being directed onto the coated substrate so as to reach the latter at a velocity not exceeding 500 feet per minute, so that the particles are retained adjacent the surface of the coatant during solidification of the latter.
- a method as claimed in claim 1 in which a second supply of the said particles is directed onto the coated substrate after the application thereto of the first supply thereof but before the molten coatant solidifies, the said second supply being smaller in quantity than the first supply and being directed onto the coated substrate so as to reach the latter at a velocity greater'than that'of the first supply.
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)
- Other Surface Treatments For Metallic Materials (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB49614/69A GB1269150A (en) | 1969-10-09 | 1969-10-09 | Method of producing a coated ferrous substrate |
Publications (1)
Publication Number | Publication Date |
---|---|
US3708322A true US3708322A (en) | 1973-01-02 |
Family
ID=10452954
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00077585A Expired - Lifetime US3708322A (en) | 1969-10-09 | 1970-10-02 | Method of producing a coated ferrous substrate |
Country Status (11)
Country | Link |
---|---|
US (1) | US3708322A (es) |
JP (1) | JPS515347B1 (es) |
BE (1) | BE757252A (es) |
DE (1) | DE2049337C3 (es) |
ES (1) | ES384365A1 (es) |
FR (1) | FR2065305A5 (es) |
GB (1) | GB1269150A (es) |
NL (1) | NL7014819A (es) |
PL (1) | PL81125B1 (es) |
SE (1) | SE357005B (es) |
ZA (1) | ZA706641B (es) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4154900A (en) * | 1976-05-14 | 1979-05-15 | Taiho Kogyo Co., Ltd. | Composite material of ferrous cladding material and aluminum cast matrix and method for producing the same |
US4568569A (en) * | 1983-02-28 | 1986-02-04 | Stein Heurtey | Method and apparatus for providing composite metallic coatings on metallic strips |
US5711990A (en) * | 1995-10-19 | 1998-01-27 | Sollac | Method of coating sheet metal |
US20070003778A1 (en) * | 2005-07-01 | 2007-01-04 | Isg Technologies Inc. | Process for applying a metallic coating, an intermediate coated product, and a finish coated product |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2521171B1 (fr) * | 1982-02-10 | 1986-04-18 | Stein Heurtey | Procede et dispositif pour la realisation de revetements metalliques composites sur des bandes metalliques |
DE3212508A1 (de) * | 1982-04-03 | 1983-10-13 | Thyssen AG vorm. August Thyssen-Hütte, 4100 Duisburg | Verfahren zur herstellung eines ueberzuges auf der oberflaeche eines metallgegenstandes |
DE117958T1 (de) * | 1983-02-18 | 1985-03-07 | Stein Heurtey, Ris Orangis | Verfahren und vorrichtung zur herstellung von metallischen verbundsueberzuegen auf metallbaendern. |
FR2560219B1 (fr) * | 1984-02-27 | 1989-09-29 | Stein Heurtey | Procede et dispositif pour l'amelioration des proprietes physico-chimiques des toles revetues a chaud |
US4873153A (en) * | 1987-06-25 | 1989-10-10 | Occidental Chemical Corporation | Hot-dip galvanized coating for steel |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2354113A (en) * | 1941-02-26 | 1944-07-18 | Arthur R Gould | Apparatus for coating metals and similar materials |
US2714563A (en) * | 1952-03-07 | 1955-08-02 | Union Carbide & Carbon Corp | Method and apparatus utilizing detonation waves for spraying and other purposes |
US2964419A (en) * | 1958-03-27 | 1960-12-13 | United States Steel Corp | Method and apparatus for producing anti-skid tread plate |
US3017689A (en) * | 1958-03-27 | 1962-01-23 | United States Steel Corp | Anti-skid tread plate |
US3155530A (en) * | 1959-05-25 | 1964-11-03 | Armco Steel Corp | Process for producing protected metal surfaces |
US3586614A (en) * | 1968-05-31 | 1971-06-22 | United States Steel Corp | Method of improving corrosion resistance of steel surfaces and resulting product |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55696B2 (es) * | 1972-08-08 | 1980-01-09 |
-
0
- BE BE757252D patent/BE757252A/xx not_active IP Right Cessation
-
1969
- 1969-10-09 GB GB49614/69A patent/GB1269150A/en not_active Expired
-
1970
- 1970-09-29 ZA ZA706641*A patent/ZA706641B/xx unknown
- 1970-09-30 PL PL1970143585A patent/PL81125B1/pl unknown
- 1970-10-02 US US00077585A patent/US3708322A/en not_active Expired - Lifetime
- 1970-10-07 DE DE2049337A patent/DE2049337C3/de not_active Expired
- 1970-10-09 SE SE13704/70A patent/SE357005B/xx unknown
- 1970-10-09 NL NL7014819A patent/NL7014819A/xx unknown
- 1970-10-09 ES ES384365A patent/ES384365A1/es not_active Expired
- 1970-10-09 FR FR7036662A patent/FR2065305A5/fr not_active Expired
- 1970-10-09 JP JP45088370A patent/JPS515347B1/ja active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2354113A (en) * | 1941-02-26 | 1944-07-18 | Arthur R Gould | Apparatus for coating metals and similar materials |
US2714563A (en) * | 1952-03-07 | 1955-08-02 | Union Carbide & Carbon Corp | Method and apparatus utilizing detonation waves for spraying and other purposes |
US2964419A (en) * | 1958-03-27 | 1960-12-13 | United States Steel Corp | Method and apparatus for producing anti-skid tread plate |
US3017689A (en) * | 1958-03-27 | 1962-01-23 | United States Steel Corp | Anti-skid tread plate |
US3155530A (en) * | 1959-05-25 | 1964-11-03 | Armco Steel Corp | Process for producing protected metal surfaces |
US3586614A (en) * | 1968-05-31 | 1971-06-22 | United States Steel Corp | Method of improving corrosion resistance of steel surfaces and resulting product |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4154900A (en) * | 1976-05-14 | 1979-05-15 | Taiho Kogyo Co., Ltd. | Composite material of ferrous cladding material and aluminum cast matrix and method for producing the same |
US4568569A (en) * | 1983-02-28 | 1986-02-04 | Stein Heurtey | Method and apparatus for providing composite metallic coatings on metallic strips |
US5711990A (en) * | 1995-10-19 | 1998-01-27 | Sollac | Method of coating sheet metal |
US20070003778A1 (en) * | 2005-07-01 | 2007-01-04 | Isg Technologies Inc. | Process for applying a metallic coating, an intermediate coated product, and a finish coated product |
US7413769B2 (en) | 2005-07-01 | 2008-08-19 | Mcdevitt Erin T | Process for applying a metallic coating, an intermediate coated product, and a finish coated product |
Also Published As
Publication number | Publication date |
---|---|
GB1269150A (en) | 1972-04-06 |
BE757252A (fr) | 1971-03-16 |
JPS515347B1 (es) | 1976-02-19 |
ZA706641B (en) | 1971-05-27 |
DE2049337B2 (de) | 1973-11-08 |
NL7014819A (es) | 1971-04-14 |
FR2065305A5 (es) | 1971-07-23 |
DE2049337A1 (de) | 1971-04-29 |
SE357005B (es) | 1973-06-12 |
DE2049337C3 (de) | 1974-06-12 |
ES384365A1 (es) | 1973-02-16 |
PL81125B1 (en) | 1975-08-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: BRITISH STEEL PLC Free format text: CHANGE OF NAME;ASSIGNOR:BRITISH STEEL CORPORATION;REEL/FRAME:004993/0383 Effective date: 19881006 |