US3181963A - Alkali metal borate masking in galvanizing process - Google Patents

Alkali metal borate masking in galvanizing process Download PDF

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Publication number
US3181963A
US3181963A US67946A US6794660A US3181963A US 3181963 A US3181963 A US 3181963A US 67946 A US67946 A US 67946A US 6794660 A US6794660 A US 6794660A US 3181963 A US3181963 A US 3181963A
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United States
Prior art keywords
strip
alkali metal
article
coated
coating
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Expired - Lifetime
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US67946A
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English (en)
Inventor
Nelson E Cook
Samuel L Norteman
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Wheeling Steel Corp
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Wheeling Steel Corp
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Publication date
Application filed by Wheeling Steel Corp filed Critical Wheeling Steel Corp
Priority to US67946A priority Critical patent/US3181963A/en
Priority to GB11270/61A priority patent/GB912876A/en
Priority to BE602222A priority patent/BE602222A/fr
Application granted granted Critical
Publication of US3181963A publication Critical patent/US3181963A/en
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Expired - Lifetime legal-status Critical Current

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    • 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
    • C23C2/003—Apparatus
    • C23C2/0034—Details related to elements immersed in bath
    • C23C2/00342—Moving elements, e.g. pumps or mixers
    • C23C2/00344—Means for moving substrates, e.g. immersed rollers or immersed bearings
    • 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
    • C23C2/003—Apparatus
    • C23C2/0035—Means for continuously moving substrate through, into or out of the bath
    • 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
    • C23C2/003—Apparatus
    • C23C2/0038—Apparatus characterised by the pre-treatment chambers located immediately upstream of the bath or occurring locally before the dipping process
    • 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
    • C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • C23C2/022—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating
    • C23C2/0224—Two or more thermal pretreatments
    • 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
    • C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • C23C2/024—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by cleaning or etching

Definitions

  • This invention relates to galvanizing a portion only of a ferrous metal article. It relates more particularly to the discovery of an improved masking substance for masking the portion of the article which is not to be galvanized and improved techniques in the galvanizing of articles in which only a portion of the article is to be galvanized. More specifically the invention is conconcerned with a method of galvanizing one side only of ferrous metal strip.
  • an alkali metal aluminate solution is utilized as a masking substance to mask one side of the strip and after application of the alkali metal aluminate solution the strip is passed through a bath of molten spelter to galvanize the side of the strip which is not coated with the akali metal aluminate solution while the side coated with the alkali metal aluminate solution remains ungalvanized.
  • the use of alkali metal aluminate solution as a masking substance is confined to a process in which the strip after application of the alkali metal aluminate solution is subjected to temperature of at least 1250 F.
  • Sodium carbonate, sodium benzoate, potassium fluoride, chromic acid, magnesium sulfate, manganese chloride, potassium bromide, sodium bromide and sodium chloride all produce heavy oxidation as in the case of alkali metal aluminate and specifically sodium aluminate.
  • Sodium acetate, potassium sulfide and sodium bromide do not adequately inhibit zinc adherence.
  • Aluminum fluoride is too dii'licultly soluble to be practical for the purpose.
  • an alkali metal borate ideally serves the purpose as a masking substance in our process in which we do not utilize a high temperature heat treatment in a reducing atmosphere.
  • the melting point of alkali metal borate is higher than the temperature of molten spelter so that the masking substance does not Bidlfih Patented May 4, i965 melt, and it effectively protects the side of the strip to which it is applied against oxidation. It is readily soluble in water which simplifies the application of the masking substance before galvanizing and its removal after galvanizing. If in any cases complete removal of the masking substance is not accomplished by washing with water the masking substance is entirely compatable with alkaline cleaning prior to bonderizing. Also the alkali metal borate has no deleterious effect on the zinc coating where it could be deposited in the rinse water.
  • a method of applying a protective metal coating to a portion only of a ferrous metal article while maintaining the remainder thereof substantially free from oxide comprising coating with a solution of an alkali metal borate the portion of the article. which is not to be metal coated and dipping the article in molten coating metal whereby to metal coat the portion of the article which is not coated with the alkali metal borate while the portion coated with the alkali metal borate remains uncoated with the coating metal and substantially free from oxide and limiting the temperature of the article and the bath during such treatment to a temperature below the melting point of the alkali metal borate, thereby producing an article having a portion metal-coated and the remainder substantially free from oxide.
  • a flux the portion of the article which is to be metal-coated.
  • a method of galvanizing one side only of ferrous metal strip comprising coating one side of the strip with an alkali metal borate and passing the strip through a bath of molten spelter whereby to galvanize the side of the strip which is not coated with the alkali metal borate while the side coated with alkali metal borate remains ungalvanized.
  • a method of galvanizing one side only of ferrous metal strip comprising passing the strip first with one of its flat sides or faces facing downwardly and then with the other of its flat sides or faces facing downwardly, applying a masking substance, preferably an alkali metal borate, to the under side of the strip on one of said passes, applying flux to the under side of the strip in the other of said passes and passing the strip through a bath of molten spelter whereby to galvanize the side of the strip which is coated with flux While the side coated with the masking substance remains ungalvanized.
  • a masking substance preferably an alkali metal borate
  • a ferrous metal strip is designated by the chain line S.
  • the strip may come from a coil of steel strip and it may be drawn ttnough the illustrated apparatus in the direction of the arrows and subsequently either recoiled or sheared into sheets.
  • the strip is guided by pulleys or rolls designated respectively and successively by reference numerals 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10.
  • the guide roll 1 Before the strip reaches the guide roll 1 it is suitably cleaned to free it from oil or other undesirable materials clinging to the surface of the strip after which, between guide rolls 1 and 2, it is heated by a heating unit 11 to insure that the strip is dry and to somewhat elevate its temperature.
  • the strip While advancing with one of its fiat sides or faces facing downwardly, is engaged by a coating applying roller 12 which deflects the strip out of a straight pass line so that the applying roller presses tightly against the strip and engages the strip by surface as distinguished from line contact.
  • the roller 12 is journaled to rotate with its lower portion immersed in a bath 13 of flux which may be any conventional flux used in the Cook-Norteman galvanizing process, as, for example, a solution of zinc ammonium chloride.
  • the flux is applied evenly to cover the entire under surface of the strip, the deflecting of the strip out "of a straight pass line by the applying roller insuring effective flux application throughout the entire area of the under side of the strip.
  • the strip After application of the flux by the roller 12 the strip is heated by a heating unit 14 to dry the flux. Desirably the flux should be completely dry when the strip reaches the masking substance applying roller presently to be described.
  • the strip passes about guide rolls 3 and 4 which reverse its direction so that it moves back from left to right whereas between guide rolls 2 and 3 it was moving from right to left viewing the drawing; also the strip is inverted so that the side which was facing upwardly between the guide rolls 2 and 3 faces downwardly between the guide rolls 4 and 5. As the strip moves between the guide rolls 4 and 5 the fiuxed surface is the upper surface.
  • a masking substance applying roller 14a analogous in structure, mounting and function to the roller 12 and also, as shown in the drawing, deflecting the strip out of a straight pass line for the same reason above stated in relation to the roller 12.
  • the lower portion of the roller 14a is immersed in masking substance 15, preferably an alkali metal borate in water solution.
  • masking substance 15 preferably an alkali metal borate in water solution.
  • sodium tetraborate will normally be used because of its ready availability and relatively low cost.
  • the strip After application of the masking substance the strip passes over a heating unit 16 which dries the masking substance. Both in the case of the flux and in the case of the masking substance the coating is applied in water solution and the heating unit following the coating applying roller evaporates the water, leaving a substantially dry coating of flux or masking substance as the case may be upon the strip. As the strip passes to the guide roll 5 its upper surface is covered with a dry coating of flux and its lower surface is covered with a dry coating of masking substance.
  • the strip passes about the guide roll 5, upwardly through a heater 17, about guide rolls 6 and 7 and downwardly through a heater 18.
  • the heaters 17 and 18 raise the temperature of the strip to a temperature approaching that of the bath of molten spelter through which the strip is to be passed, but the strip is not heat treated at a temperature even approaching 1250 F. and the strip is not subjected to a reducing atmosphere when being heated by the heaters 17 and 18.
  • the alkali metal borate has no deleterious effect on the strip and effectively covers one surface thereof.
  • the galvanizing pot is designated by reference numeral 19 and contains a bath 20 of molten spelter.
  • the guide rolls 8 and 9 are journaled for rotation beneath the surface of the spelter in the galvanizing pot 19 and the strip, coated on one face with dry flux and on the opposite face with dry masking substance, passes through the bath of molten spelter about the guide rolls 8 and 9 and up out of the bath between the exit rolls 21.
  • the fiuxed side of the strip which is the upper side between the guide rolls 8 and 9, is effectively galvanized while the opposite side of the strip, i.e., the under side between the guide rolls 8 and 9, to which the masking substance was applied remains ungalvanized, the masking substance inhibiting adherence of spelter to the side of the strip bearing the masking substance.
  • the small amounts of oxides and metal which may lightly cling to the masking substance may be removed by suitable removing means acting on the ungalvanized side of the strip.
  • the removing means are indicated in the drawing by a diagrammatic representation of a brush 22. As the arrow indicates, the brush may be rotated so that it turns counter to the direction of advance of the strip.
  • the brush may be of various materials; we find that a brush of thin flexible wire serves adequately to remove the lightly adhering oxides and metal.
  • the masking substance remains on the ungalvanized portion of the strip until the strip passes through the cooling zone 23 and then, after cooling, if it is desired to remove the masking substance prior to subsequent treatment, it may be easily removed by Water.
  • the strip passes about the guide roll 10 and through a cooling unit 23 whence it may pass to a roller leveler and either a shear for shearing the strip into sheets or a reel for forming the strip into a coil.
  • the flux and masking substance may be applied by rolls while the strip is moving generally horizontally or at an acute angle to the horizontal and may be applied otherwise, as, for example, by spraying, while the strip is moving generally horizontally or generally vertically or at an acute angle to the horizontal.
  • a method of applying a protective metal coating to a a portion only of a ferrous metal article while maintaining the remainder thereof substantially free from oxide, obviating a high temperature oxide-removing heat treatment, comprising coating with a solution of an alkali metal borate the portion of the article which is not to be metal-coated and dipping the article in molten coating metal whereby to metal-coat the portion of the article which is not coated with the alkali metal borate while the portion coated with the alkali metal borate remains uncoated with the coating metal and substantially free from oxide and limiting the temperature of the article and the bath during such treatment to a temperature below the melting point of the alkali metal borate, thereby producing an article having a portion metal-coated and the remainder substantially free from oxide.
  • a method of galvanizing a portion only of a terrous metal article while maintaining the remainder thereof substantially free from oxide, obviating a high temperature oxide-removing heat treatment comprising coating with a solution of an alkali metal borate the portion of the article which is not to be galvanized and dipping the article in molten spelter whereby to galvanize the portion of the article which is not coated with the alkali metal borate while the portion coated with alkali metal borate remains ungalvanized and substantially free from oxide and limiting the temperature to which the article is subjected during such treatment to the temperature of the molten spelter, thereby producing an article having a portion galvanized and the remainder substantially free from oxide.
  • a method of galvanizing a portion only of a ferrous metal article while maintaining the remainder thereof substantially free from oxide, obviating a high temperature oxide-removing heat treatment, comprising coating with a flux the portion of the article which is to be galvanized and coating with a solution of an alkali metal borate the portion of the article which is not to be galvanized and dipping the article in molten spelter whereby to galvanize the portion of the article which is coated with flux while the portion coated with alkali metal borate remains ungalvanized and substantially free from oxide and limiting the temperature to which the article is subjected during such treatment to the temperature of the molten spelter, thereby producing an article having a portion galvanized and the remainder substantially free from oxide.
  • a method of galvanizing one side only of ferrous metal strip while maintaining the other side thereof substantially free from oxide, obviating a high temperature oxide-removing heat treatment comprising coating one side of the strip with a solution of an alkali metal borate and passing the strip through a bath of molten spelter whereby to galvanize the side of the strip which is not coated with the alkali metal borate While the side coated with alkali metal borate remains ungalvanized and substantially free from oxide and limiting the temperature to which the strip is subjected during such treatment to the temperature of the molten spelter, thereby producing a strip having one side galvanized and the other side substantially free from oxide.
  • a method of galvanizing one side only of ferrous metal stri while maintaining the other side thereof substantially free from oxide, obviating a high temperature oxide-removing heat treatment comprising coating one side of the strip with a flux and coating the other side of the strip with a solution of an alkali metal borate and passing the strip through a bath of molten spelter whereby to galvanize the side of the strip which is coated with flux while the side coated with alkali metal borate remains ungalvanized and substantially free from oxide and limiting the temperature to which the strip is subjected during such treatment to the temperature of the molten spelter, thereby producing a strip having one side galvanized and the other side substantially free from oxide.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Coating With Molten Metal (AREA)
US67946A 1960-11-08 1960-11-08 Alkali metal borate masking in galvanizing process Expired - Lifetime US3181963A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US67946A US3181963A (en) 1960-11-08 1960-11-08 Alkali metal borate masking in galvanizing process
GB11270/61A GB912876A (en) 1960-11-08 1961-03-28 Galvanizing ferrous metal articles
BE602222A BE602222A (fr) 1960-11-08 1961-04-05 Galvanisation des articles en métal ferreux.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US67946A US3181963A (en) 1960-11-08 1960-11-08 Alkali metal borate masking in galvanizing process

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US3181963A true US3181963A (en) 1965-05-04

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BE (1) BE602222A (fr)
GB (1) GB912876A (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3398010A (en) * 1964-08-17 1968-08-20 United States Steel Corp Masking composition for galvanized metal
US3635748A (en) * 1968-11-29 1972-01-18 Bethlehem Steel Corp Method for treating a flux coating
US4120997A (en) * 1976-05-11 1978-10-17 Inland Steel Company Process for producing one-side galvanized sheet material
US4125647A (en) * 1976-06-01 1978-11-14 Kawasaki Steel Corporation Method of producing one-side plated steel sheets or strips
US4177303A (en) * 1977-04-22 1979-12-04 Dominion Foundries And Steel, Limited Method of galvanizing a portion only of a ferrous metal article
US4201592A (en) * 1976-10-14 1980-05-06 Nisshin Steel Co., Ltd. Plating-inhibitor for partially plating steel plate with molten metal
US4264652A (en) * 1978-09-13 1981-04-28 Desire Danese Method for locally galvanizing a piece of metal
US4477491A (en) * 1981-11-18 1984-10-16 Kawasaki Steel Corporation One-side zinc hot dipping process using an anti-plating agent
WO2013189601A1 (fr) * 2012-06-20 2013-12-27 Tata Steel Nederland Technology B.V. Bande métallique revêtue d'un seul côté

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US201340A (en) * 1878-03-19 Improvement in machines for coating paper with tobacco-pulp
US890853A (en) * 1907-07-11 1908-06-16 Max Fessler Apparatus for soldering chain-links.
US1567632A (en) * 1922-08-23 1925-12-29 Charles G Whinfrey Composition of matter for selective case hardening
US1742214A (en) * 1925-02-19 1930-01-07 Mccord Radiator & Mfg Co Metal-coating apparatus and method
US1835113A (en) * 1928-04-20 1931-12-08 Westinghouse Lamp Co Protective coating for metal surfaces
US1862249A (en) * 1930-06-28 1932-06-07 Wilder Metal Company Process and apparatus for coating ferric articles with a. metallic protective
US1928714A (en) * 1929-10-08 1933-10-03 Technicolor Apparatus for affixing pins to metal belts
US2343158A (en) * 1942-01-12 1944-02-29 Marquette Mfg Co Inc Spatter and cleaning shield for electric arc welding
US2498485A (en) * 1946-08-07 1950-02-21 Gen Electric Method of tinning a steel shell bearing
US2557983A (en) * 1949-03-22 1951-06-26 Pittsburgh Plate Glass Co Transparent electroconductive article
US2559969A (en) * 1950-02-16 1951-07-10 Pittsburgh Plate Glass Co Method of applying a masking composition to a glass base
US2689545A (en) * 1950-06-30 1954-09-21 Lorentzen Hardware Mfg Corp Roll-painting apparatus
US2709516A (en) * 1950-07-29 1955-05-31 Harold L Trembicki Drawing compound and method
US2894850A (en) * 1958-05-14 1959-07-14 Gen Motors Corp Method of galvanizing ferrous metal strip

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US201340A (en) * 1878-03-19 Improvement in machines for coating paper with tobacco-pulp
US890853A (en) * 1907-07-11 1908-06-16 Max Fessler Apparatus for soldering chain-links.
US1567632A (en) * 1922-08-23 1925-12-29 Charles G Whinfrey Composition of matter for selective case hardening
US1742214A (en) * 1925-02-19 1930-01-07 Mccord Radiator & Mfg Co Metal-coating apparatus and method
US1835113A (en) * 1928-04-20 1931-12-08 Westinghouse Lamp Co Protective coating for metal surfaces
US1928714A (en) * 1929-10-08 1933-10-03 Technicolor Apparatus for affixing pins to metal belts
US1862249A (en) * 1930-06-28 1932-06-07 Wilder Metal Company Process and apparatus for coating ferric articles with a. metallic protective
US2343158A (en) * 1942-01-12 1944-02-29 Marquette Mfg Co Inc Spatter and cleaning shield for electric arc welding
US2498485A (en) * 1946-08-07 1950-02-21 Gen Electric Method of tinning a steel shell bearing
US2557983A (en) * 1949-03-22 1951-06-26 Pittsburgh Plate Glass Co Transparent electroconductive article
US2559969A (en) * 1950-02-16 1951-07-10 Pittsburgh Plate Glass Co Method of applying a masking composition to a glass base
US2689545A (en) * 1950-06-30 1954-09-21 Lorentzen Hardware Mfg Corp Roll-painting apparatus
US2709516A (en) * 1950-07-29 1955-05-31 Harold L Trembicki Drawing compound and method
US2894850A (en) * 1958-05-14 1959-07-14 Gen Motors Corp Method of galvanizing ferrous metal strip

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3398010A (en) * 1964-08-17 1968-08-20 United States Steel Corp Masking composition for galvanized metal
US3635748A (en) * 1968-11-29 1972-01-18 Bethlehem Steel Corp Method for treating a flux coating
US4120997A (en) * 1976-05-11 1978-10-17 Inland Steel Company Process for producing one-side galvanized sheet material
US4125647A (en) * 1976-06-01 1978-11-14 Kawasaki Steel Corporation Method of producing one-side plated steel sheets or strips
US4201592A (en) * 1976-10-14 1980-05-06 Nisshin Steel Co., Ltd. Plating-inhibitor for partially plating steel plate with molten metal
US4177303A (en) * 1977-04-22 1979-12-04 Dominion Foundries And Steel, Limited Method of galvanizing a portion only of a ferrous metal article
US4264652A (en) * 1978-09-13 1981-04-28 Desire Danese Method for locally galvanizing a piece of metal
US4477491A (en) * 1981-11-18 1984-10-16 Kawasaki Steel Corporation One-side zinc hot dipping process using an anti-plating agent
WO2013189601A1 (fr) * 2012-06-20 2013-12-27 Tata Steel Nederland Technology B.V. Bande métallique revêtue d'un seul côté

Also Published As

Publication number Publication date
BE602222A (fr) 1961-10-05
GB912876A (en) 1962-12-12

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