ES349633A1 - Method of controlling coating thickness - Google Patents

Method of controlling coating thickness

Info

Publication number
ES349633A1
ES349633A1 ES349633A ES349633A ES349633A1 ES 349633 A1 ES349633 A1 ES 349633A1 ES 349633 A ES349633 A ES 349633A ES 349633 A ES349633 A ES 349633A ES 349633 A1 ES349633 A1 ES 349633A1
Authority
ES
Spain
Prior art keywords
strip
nozzles
height
impingement
throat
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
Application number
ES349633A
Other languages
Spanish (es)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
United States Steel Corp
Original Assignee
United States Steel Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by United States Steel Corp filed Critical United States Steel Corp
Publication of ES349633A1 publication Critical patent/ES349633A1/en
Expired legal-status Critical Current

Links

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
    • C23C2/14—Removing excess of molten coatings; Controlling or regulating the coating thickness
    • C23C2/16—Removing excess of molten coatings; Controlling or regulating the coating thickness using fluids under pressure, e.g. air knives
    • C23C2/18—Removing excess of molten coatings from elongated material
    • C23C2/20—Strips; Plates

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)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Coating Apparatus (AREA)

Abstract

The thickness of coating on hot dip coated strip is controlled by projecting gaseous streams against opposite surfaces of the strip from nozzles positioned on either side thereof in such manner that the impingement heights of the gas streams on the strip overlap and are offset from each other by an amount of from 1/ 20 to of the impingement height, the gas streams extending beyond the width of the strip. It is stated that such arrangement eliminates the formation of built-up ridges of coating material at the edges of the strip. The coating metals may be Al, Zn, Sn or Pb. Vertically moving steel strip leaving a hot dip bath passes between air nozzles 10a, 10b, the nozzles being so positioned that the impingement heights H of the air streams are offset by an amount X of from 1/ 20 to of this height H. Each nozzle comprises a heading 12, a convergent throat 14 an orifice 16 having lips 221, 2211. Lip 221 is adjustably fixed to throat 14 by bolts 26a for varying this height S of the nozzle aperture. A screen 20 is provided in throat 14. These nozzles may be tilted between an angle of 20 degrees above the horizontal to an angle of 45 degrees below the horizontal, and are positioned between inch and 1 inches from the strip. The nozzles are disposed about 6 inches above the surface of the bath. An alternative form of nozzle is described, having replaceable lips, the thickness of which determines this aperture height S.
ES349633A 1967-02-02 1968-01-23 Method of controlling coating thickness Expired ES349633A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US61347467A 1967-02-02 1967-02-02

Publications (1)

Publication Number Publication Date
ES349633A1 true ES349633A1 (en) 1969-04-01

Family

ID=24457454

Family Applications (1)

Application Number Title Priority Date Filing Date
ES349633A Expired ES349633A1 (en) 1967-02-02 1968-01-23 Method of controlling coating thickness

Country Status (10)

Country Link
US (1) US3459587A (en)
JP (1) JPS512055B1 (en)
AT (1) AT283844B (en)
BE (1) BE709842A (en)
DE (1) DE1696619B2 (en)
ES (1) ES349633A1 (en)
FR (1) FR1554130A (en)
GB (1) GB1196073A (en)
LU (1) LU55387A1 (en)
NL (1) NL162966C (en)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3619247A (en) * 1968-08-29 1971-11-09 Bethlehem Steel Corp Method of producing thin, bright unspangled galvanized coatings on ferrous metal strips
US3607366A (en) * 1968-11-14 1971-09-21 Yawata Iron & Steel Co Removal of excess molten metal coatings by gas blast without ripple formations on coated surfaces
US3773013A (en) * 1972-02-04 1973-11-20 Bethlehem Steel Corp Coating apparatus with fluid doctor blade
US3841900A (en) * 1972-02-04 1974-10-15 Bethlehem Steel Corp Apparatus and method for obtaining uniform coating thickness
US3932683A (en) * 1972-10-10 1976-01-13 Inland Steel Company Control of coating thickness of hot-dip metal coating
US3865298A (en) * 1973-08-14 1975-02-11 Atomic Energy Commission Solder leveling
US3924794A (en) * 1973-08-14 1975-12-09 Us Energy Solder leveling process
JPS5645876Y2 (en) * 1973-10-25 1981-10-27
US4078103A (en) * 1975-04-17 1978-03-07 Armco Steel Corporation Method and apparatus for finishing molten metallic coatings
US4198922A (en) * 1978-10-10 1980-04-22 United States Steel Corporation Gas barrier coating control apparatus with a readily replaceable gas orifice header segment
US4719129A (en) * 1987-02-09 1988-01-12 Armco Inc. Multiple nozzle jet finishing
AU621142B2 (en) * 1988-08-24 1992-03-05 Australian Wire Industries Pty Ltd Jet wiping nozzle
AU616989B2 (en) * 1988-08-24 1991-11-14 Australian Wire Industries Pty Ltd Stabilization of jet wiped wire
CA1328166C (en) * 1988-09-29 1994-04-05 Hidekazu Kawano Two-fluid injection apparatus and a manufacturing apparatus including such injecting apparatus for manufacturing minimized spangle molten plated steel plate
US5064118A (en) * 1990-12-26 1991-11-12 Bethlehem Steel Corporation Method and apparatus for controlling the thickness of a hot-dip coating
US5651819A (en) * 1993-06-24 1997-07-29 The Idod Trust Continuous tube forming and coating
US5732874A (en) * 1993-06-24 1998-03-31 The Idod Trust Method of forming seamed metal tube
US7563322B2 (en) * 2007-04-09 2009-07-21 West Virginia University Method and apparatus for online flow control over the span of a high aspect ratio slot jet
FR2956410B1 (en) * 2010-02-16 2012-01-27 Snecma DEVICE FOR OBTAINING LIQUID-COATED CERAMIC FIBERS FROM A THICK METALLIC SHEATH
JP6372527B2 (en) * 2016-07-13 2018-08-15 Ｊｆｅスチール株式会社 Manufacturing method of molten metal plating steel strip and continuous molten metal plating equipment
AU2022341700A1 (en) * 2021-09-10 2024-02-08 Jfe Steel Corporation Molten metal-plated steel strip production method

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US602532A (en) * 1898-04-19 Art of plating sheet metal
US811854A (en) * 1903-08-18 1906-02-06 John Lee Process of tinning or coating metal sheets with tin or other metallic coatings.
US794704A (en) * 1904-09-29 1905-07-11 Olin S Fellows Means for removing superfluous metallic coating from sheet metal.
US1672526A (en) * 1926-03-23 1928-06-05 American Mach & Foundry Metal-coating machine
US2243979A (en) * 1935-12-17 1941-06-03 Reynolds Metals Co Production of aluminum-coated iron or steel
US2160864A (en) * 1937-05-03 1939-06-06 Continental Steel Corp Producing galvanized metal sheets or articles
US2370495A (en) * 1941-02-26 1945-02-27 Arthur H Parker Apparatus for coating sheet metal
US2390007A (en) * 1943-12-31 1945-11-27 Dominion Foundries & Steel Apparatus for continuously hot dip coating of tin on coiled strip
US2950991A (en) * 1959-04-30 1960-08-30 American Chain & Cable Co Method and apparatus for coating ferrous metal with aluminum
US3231415A (en) * 1961-08-15 1966-01-25 Dow Chemical Co Method of coating thermoplastic webs

Also Published As

Publication number Publication date
FR1554130A (en) 1969-01-17
AT283844B (en) 1970-08-25
DE1696619B2 (en) 1973-08-23
JPS512055B1 (en) 1976-01-22
NL162966C (en) 1980-07-15
NL6801161A (en) 1968-08-05
US3459587A (en) 1969-08-05
DE1696619A1 (en) 1972-03-23
NL162966B (en) 1980-02-15
BE709842A (en) 1968-07-24
LU55387A1 (en) 1968-04-11
GB1196073A (en) 1970-06-24

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