US3841894A - Minimizing crazing of hot-dip aluminum coatings - Google Patents

Minimizing crazing of hot-dip aluminum coatings Download PDF

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Publication number
US3841894A
US3841894A US00290612A US29061272A US3841894A US 3841894 A US3841894 A US 3841894A US 00290612 A US00290612 A US 00290612A US 29061272 A US29061272 A US 29061272A US 3841894 A US3841894 A US 3841894A
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US
United States
Prior art keywords
bath
percent
crazing
hot
content
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
Application number
US00290612A
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English (en)
Inventor
R Leonard
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
Priority to US00290612A priority Critical patent/US3841894A/en
Priority to ZA737248*A priority patent/ZA737248B/xx
Priority to AU60244/73A priority patent/AU476750B2/en
Priority to GB4374773A priority patent/GB1445693A/en
Priority to BR7215/73A priority patent/BR7307215D0/pt
Priority to DE19732347206 priority patent/DE2347206A1/de
Priority to JP48105827A priority patent/JPS4993232A/ja
Priority to IT7369772A priority patent/IT999572B/it
Priority to ES418900A priority patent/ES418900A1/es
Priority to AR250159A priority patent/AR197633A1/es
Priority to CA181,459A priority patent/CA1003711A/en
Priority to AT806773A priority patent/AT327635B/de
Priority to RO7300076128A priority patent/RO63004A/ro
Priority to BE135876A priority patent/BE805116A/xx
Priority to PL1973165326A priority patent/PL94432B1/pl
Priority to FR7333824A priority patent/FR2200373B1/fr
Application granted granted Critical
Publication of US3841894A publication Critical patent/US3841894A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • C23C2/12—Aluminium or alloys based thereon
    • 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
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/2419—Fold at edge
    • Y10T428/24215—Acute or reverse fold of exterior component
    • Y10T428/24223—Embedded in body of web

Definitions

  • this Sh samples (26 gage) e coated n' am nuh type coated h hot eashy formed due to the silicon alloy bath compositions containing a variety of formahoh of a hrhhe hohaihhhhum alloy layer at the Mn and Fe concentrations. (See Table 1) Prior to coatmterface between the coatmg and ferrous substrate.
  • adherent coatings are q hf the led for four minutes in ten percent l-lCl solution, and generally p y from aholll 4 to l 1% the hath fluxed by immersion in a saturated aqueous solution of to retard the rate of hy g between the bath metal K2ZrF6. After fluxing, the samples were dried so as to and the ferrous substrate.
  • each sample was bent taken conluhchhh wlth the appended Claims 30 again sothat the next bend was over one sheet thickg zf m ness (1T).
  • Samples were then bent over increasing hlustratlhh of a behdtest Spec" sheet thicknesses (see the FIGURE) until the number 9; t edeva of cram? tehdehcy' l d h of sheet thicknesses was reached in which no crazing m t 6 causes 0 crahmg revea e a was observed.
  • Results are reported in Table l for both the S k propagatgd through masswe nehdle'shapeh (a) the number of sheet thicknesses over which sampartlcles 1n the coating. Electron-probe microanalysis plegwele bent to obtain no crazing, anddfol. (b) the of these i revehled a h contalhe-d bend condition. For each composition, the ratings reh and m "i always ported are the average of from four to eight different present in aluminum-coating baths.
  • the benefits of this invention may therefore be achieved by utilizing the following procedure.
  • the cleaned strip is bright annealed under a controlled atmosphere, thereby obviating the need for fluxing.
  • the annealed strip is cooled, preferably entering the coating bath at a temperature slightly above that of the bath.
  • the strip is maintained in a controlled atmosphere between the annealing furnace and the coating bath, thus permittingthe strip surface to alloy readily with the molten bath metal and form a continuous protective coating.
  • the coated strip is then passed through an appropriate device, e.g. an air knife, for final control of the coating weight.
  • Typical coating weights or thicknesses for sheet product vary from about 0.20 to about 1.0 ounces per square foot of sheet (i.e., about 0.4 to 2.0 mils thick per side).
  • the coating bath generally contains from about 7 to about 9 percent silicon and is maintained at temperatures ranging from about 1,180"! to about l,300F.
  • a preferred practice employs a Mn content of about 0.4 to 0.8 percent, in a bath maintained at a temperature of l,200l ,250F, wherein iron content thereof will be less than about 1.5 percent. It has been found that manganese contents within the above preferred range reduces the maximum iron solubility from about 2.5 percent (manganese-free bath) to less than about 1.5 percent. Thus, the addition of manganese offers a further advantage in that the reduced iron solubility decreases the rate of attack on the rigging.
  • the improvement which comprises, adding Mn to said molten bath in an amount sufficient to maintain a concentration of from about 0.2 to about 1.5 percent.

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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)
  • Coating With Molten Metal (AREA)
US00290612A 1972-09-20 1972-09-20 Minimizing crazing of hot-dip aluminum coatings Expired - Lifetime US3841894A (en)

Priority Applications (16)

Application Number Priority Date Filing Date Title
US00290612A US3841894A (en) 1972-09-20 1972-09-20 Minimizing crazing of hot-dip aluminum coatings
ZA737248*A ZA737248B (en) 1972-09-20 1973-09-11 Minimizing crazing of hot-dip aluminum coatings
AU60244/73A AU476750B2 (en) 1972-09-20 1973-09-12 Minimizing crazing of hot-drip aluminum coatings
BR7215/73A BR7307215D0 (pt) 1972-09-20 1973-09-18 Processo para revestir de aluminio substratos de ferro, e a substrato ferroso revestido
GB4374773A GB1445693A (en) 1972-09-20 1973-09-18 Reducing crazing of hot-dip aluminum coatings
AR250159A AR197633A1 (es) 1972-09-20 1973-09-19 Metodo para aluminizar por inmersion en caliente a substratos ferrosos
IT7369772A IT999572B (it) 1972-09-20 1973-09-19 Procedimento di alluminizzazione di substrati perrosi mediante immersione in bagno fuso
ES418900A ES418900A1 (es) 1972-09-20 1973-09-19 Un metodo para la aluminizacion en bano caliente de sustra-tos ferreos.
DE19732347206 DE2347206A1 (de) 1972-09-20 1973-09-19 Verfahren zum aufbringen von aluminiumschutzueberzuegen auf eisensubstraten und mit solchen ueberzuegen versehene substrate
CA181,459A CA1003711A (en) 1972-09-20 1973-09-19 Minimizing crazing of hot-dip aluminum coatings
AT806773A AT327635B (de) 1972-09-20 1973-09-19 Verfahren zum uberziehen einer eisenunterlage mit einer aluminium-deckschicht
JP48105827A JPS4993232A (ja) 1972-09-20 1973-09-19
BE135876A BE805116A (fr) 1972-09-20 1973-09-20 Reduction au minimum des craquelures superficielles dans les revetements d'aluminium appliques par immersion a chaud
PL1973165326A PL94432B1 (pl) 1972-09-20 1973-09-20 Sposob zanurzeniowego aluminiowania powierzchni zelaza
RO7300076128A RO63004A (fr) 1972-09-20 1973-09-20 Procede pour revetement des bandes metalliques a aluminium
FR7333824A FR2200373B1 (ja) 1972-09-20 1973-09-20

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00290612A US3841894A (en) 1972-09-20 1972-09-20 Minimizing crazing of hot-dip aluminum coatings

Publications (1)

Publication Number Publication Date
US3841894A true US3841894A (en) 1974-10-15

Family

ID=23116791

Family Applications (1)

Application Number Title Priority Date Filing Date
US00290612A Expired - Lifetime US3841894A (en) 1972-09-20 1972-09-20 Minimizing crazing of hot-dip aluminum coatings

Country Status (16)

Country Link
US (1) US3841894A (ja)
JP (1) JPS4993232A (ja)
AR (1) AR197633A1 (ja)
AT (1) AT327635B (ja)
AU (1) AU476750B2 (ja)
BE (1) BE805116A (ja)
BR (1) BR7307215D0 (ja)
CA (1) CA1003711A (ja)
DE (1) DE2347206A1 (ja)
ES (1) ES418900A1 (ja)
FR (1) FR2200373B1 (ja)
GB (1) GB1445693A (ja)
IT (1) IT999572B (ja)
PL (1) PL94432B1 (ja)
RO (1) RO63004A (ja)
ZA (1) ZA737248B (ja)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5789089A (en) * 1995-05-18 1998-08-04 Nippon Steel Corporation Hot-dipped aluminum coated steel sheet having excellent corrosion resistance and heat resistance, and production method thereof
CN108774709A (zh) * 2018-05-31 2018-11-09 马鞍山钢铁股份有限公司 一种对光和热具有优异隔热反射性的热浸镀层钢板及制备方法
US10287440B2 (en) 2014-07-16 2019-05-14 Thyssenkrupp Steel Europe Ag Steel product with an anticorrosive coating of aluminum alloy and method for the production thereof

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3212181A1 (de) * 1982-04-01 1983-10-06 Nisshin Steel Co Ltd Stahltraeger fuer eine flachdruckplatte, sowie verfahren zur herstellung
JPH0715964Y2 (ja) * 1988-06-25 1995-04-12 段谷産業株式会社 建築用幅木
IT1254402B (it) * 1992-06-23 1995-09-14 Sviluppo Materiali Spa Rivestimento a base di alluminio per manufatti metallici.
CN107287543A (zh) * 2017-06-06 2017-10-24 上海大学 Al‑Si系合金镀层材料、其制备方法和应用

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2731362A (en) * 1953-01-02 1956-01-17 Aluminum Co Of America Aluminum coating of ferrous metal articles
US3639107A (en) * 1969-07-22 1972-02-01 Aluminum Co Of America Hot-dip-aluminizing alloy

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2731362A (en) * 1953-01-02 1956-01-17 Aluminum Co Of America Aluminum coating of ferrous metal articles
US3639107A (en) * 1969-07-22 1972-02-01 Aluminum Co Of America Hot-dip-aluminizing alloy

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Handbook of Chemistry and Physics, Chemical Rubber Publishing Co., 1949, pages 1975 1976. *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5789089A (en) * 1995-05-18 1998-08-04 Nippon Steel Corporation Hot-dipped aluminum coated steel sheet having excellent corrosion resistance and heat resistance, and production method thereof
US10287440B2 (en) 2014-07-16 2019-05-14 Thyssenkrupp Steel Europe Ag Steel product with an anticorrosive coating of aluminum alloy and method for the production thereof
CN108774709A (zh) * 2018-05-31 2018-11-09 马鞍山钢铁股份有限公司 一种对光和热具有优异隔热反射性的热浸镀层钢板及制备方法

Also Published As

Publication number Publication date
BR7307215D0 (pt) 1974-06-27
RO63004A (fr) 1978-01-15
JPS4993232A (ja) 1974-09-05
FR2200373B1 (ja) 1976-10-01
AU6024473A (en) 1975-03-13
AU476750B2 (en) 1976-09-30
BE805116A (fr) 1974-03-20
ES418900A1 (es) 1976-03-01
DE2347206A1 (de) 1974-03-28
CA1003711A (en) 1977-01-18
ZA737248B (en) 1974-08-28
AT327635B (de) 1976-02-10
IT999572B (it) 1976-03-10
ATA806773A (de) 1975-04-15
GB1445693A (en) 1976-08-11
FR2200373A1 (ja) 1974-04-19
PL94432B1 (pl) 1977-08-31
AR197633A1 (es) 1974-04-23

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