EP1186679A1 - Hot-dip galvanising alloy and process - Google Patents

Hot-dip galvanising alloy and process Download PDF

Info

Publication number
EP1186679A1
EP1186679A1 EP00203141A EP00203141A EP1186679A1 EP 1186679 A1 EP1186679 A1 EP 1186679A1 EP 00203141 A EP00203141 A EP 00203141A EP 00203141 A EP00203141 A EP 00203141A EP 1186679 A1 EP1186679 A1 EP 1186679A1
Authority
EP
European Patent Office
Prior art keywords
alloy
zinc
hot
galvanising
weight
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.)
Withdrawn
Application number
EP00203141A
Other languages
German (de)
French (fr)
Inventor
Mik c/o N.V. Union Miniere S.A. Gilles
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.)
Umicore NV SA
Original Assignee
Umicore NV SA
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 Umicore NV SA filed Critical Umicore NV SA
Priority to EP00203141A priority Critical patent/EP1186679A1/en
Priority to AU2001295536A priority patent/AU2001295536A1/en
Priority to PCT/EP2001/010155 priority patent/WO2002022907A1/en
Priority to EP01976184A priority patent/EP1325168A1/en
Priority to BR0113801-4A priority patent/BR0113801A/en
Publication of EP1186679A1 publication Critical patent/EP1186679A1/en
Withdrawn legal-status Critical Current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
    • C23C2/04—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

Definitions

  • the present invention relates to a bath for hot-dip galvanising consisting of alloyed zinc, that is particularly useful for batchwise galvanising steel articles.
  • the aim of the present invention is therefore to provide a bath composition for hot-dip galvanising, which results in a coating thickness of 30 to 50 ⁇ m. Also, the thickness of the intermetallic layer is reduced to approximately 30 to 35 ⁇ m. This induces an increased resistance to stress induced crack formation as required e.g. for critical parts in the automotive industry.
  • the bath contains, by weight, 0.1 to less than 1 % Bi, 0.01 to 0.05 % Al, 0.04 to 0.12 % Ni, up to 0.05 % Mn, the rest being zinc and unavoidable impurities.
  • the bath contains 0.3 to 0.8 % Bi, 0.02 to 0.04 % Al, 0.06 to 0.10 % Ni and up to 0.05 % Mn.
  • a bath composition with 0.5 % Bi, 0.03 % Al and 0.08 % Ni is especially preferred.
  • the galvanising process using the alloy of the invention is particularly suitable for coating low reactivity steel.
  • low reactivity steel is meant steel comprising, by weight, Si and P in such amounts that Si ⁇ 0.03 % and % Si + 2.5 x % P ⁇ 0.09.

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)

Abstract

Alloy and process for galvanising steel by immersion in a zinc alloy containing bath comprising by weight 0.1 to less than 1% Bi, 0.01 to 0.05% Al, 0.04 to 0.12% Ni up to 0.05% Mn, the rest being zinc and unavoidable impurities.

Description

  • The present invention relates to a bath for hot-dip galvanising consisting of alloyed zinc, that is particularly useful for batchwise galvanising steel articles.
  • Conventional galvanisation practice results in a coating thickness of 70 to 120 µm. A drawback of such thick coatings is the reduced resistance to stress induced crack formation.
  • The aim of the present invention is therefore to provide a bath composition for hot-dip galvanising, which results in a coating thickness of 30 to 50 µm. Also, the thickness of the intermetallic layer is reduced to approximately 30 to 35 µm. This induces an increased resistance to stress induced crack formation as required e.g. for critical parts in the automotive industry.
  • According to the invention the bath contains, by weight, 0.1 to less than 1 % Bi, 0.01 to 0.05 % Al, 0.04 to 0.12 % Ni, up to 0.05 % Mn, the rest being zinc and unavoidable impurities. Preferably, the bath contains 0.3 to 0.8 % Bi, 0.02 to 0.04 % Al, 0.06 to 0.10 % Ni and up to 0.05 % Mn. A bath composition with 0.5 % Bi, 0.03 % Al and 0.08 % Ni is especially preferred.
  • The galvanising process using the alloy of the invention is particularly suitable for coating low reactivity steel. By low reactivity steel is meant steel comprising, by weight, Si and P in such amounts that Si < 0.03 % and % Si + 2.5 x % P < 0.09.

Claims (4)

  1. An alloy for hot-dip galvanising steel comprising, by weight, 0.1 to less than 1 % Bi, 0.01 to 0.05 % Al, 0.04 to 0.12 % Ni, up to 0.05 % Mn, the rest being zinc and unavoidable impurities.
  2. An alloy according to claim 1, comprising, by weight, 0.3 to 0.8 % Bi, 0.02 to 0.04 % Al, 0.06 to 0.10 % Ni, up to 0.05 % Mn, the rest being zinc and unavoidable impurities.
  3. A process for galvanising steel by immersion in a zinc alloy galvanising bath comprising the step of immersing the steel articles in a molten bath of a zinc alloy comprising, by weight, 0.1 to less than 1 % Bi, 0.01 to 0.05 % Al, 0.04 to 0.12 % Ni, up to 0.05 % Mn, the rest being zinc and unavoidable impurities.
  4. A process according to claim 3, characterised in that the steel articles comprise, by weight, Si and P in such amounts that Si < 0.03 % and % Si + 2.5 x % P < 0.09.
EP00203141A 2000-09-12 2000-09-12 Hot-dip galvanising alloy and process Withdrawn EP1186679A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP00203141A EP1186679A1 (en) 2000-09-12 2000-09-12 Hot-dip galvanising alloy and process
AU2001295536A AU2001295536A1 (en) 2000-09-12 2001-09-04 Hot-dip galvanising alloy and process
PCT/EP2001/010155 WO2002022907A1 (en) 2000-09-12 2001-09-04 Hot-dip galvanising alloy and process
EP01976184A EP1325168A1 (en) 2000-09-12 2001-09-04 Hot-dip galvanising alloy and process
BR0113801-4A BR0113801A (en) 2000-09-12 2001-09-04 Alloy for hot dip galvanizing steel, and process for dip galvanizing steel in a zinc alloy galvanizing bath

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP00203141A EP1186679A1 (en) 2000-09-12 2000-09-12 Hot-dip galvanising alloy and process

Publications (1)

Publication Number Publication Date
EP1186679A1 true EP1186679A1 (en) 2002-03-13

Family

ID=8172008

Family Applications (2)

Application Number Title Priority Date Filing Date
EP00203141A Withdrawn EP1186679A1 (en) 2000-09-12 2000-09-12 Hot-dip galvanising alloy and process
EP01976184A Withdrawn EP1325168A1 (en) 2000-09-12 2001-09-04 Hot-dip galvanising alloy and process

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP01976184A Withdrawn EP1325168A1 (en) 2000-09-12 2001-09-04 Hot-dip galvanising alloy and process

Country Status (4)

Country Link
EP (2) EP1186679A1 (en)
AU (1) AU2001295536A1 (en)
BR (1) BR0113801A (en)
WO (1) WO2002022907A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004079032A1 (en) * 2003-03-07 2004-09-16 N.V. Bekaert S.A. Zinc-nickel coating layer
CN107699836A (en) * 2017-10-16 2018-02-16 宜兴大平杆塔制造有限公司 A kind of galvanized method of power transmission line column

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09202952A (en) * 1996-01-25 1997-08-05 Kawasaki Steel Corp High workability galvanized steel sheet and its production
WO1998053109A1 (en) * 1997-05-23 1998-11-26 N.V. Union Miniere S.A. Alloy and process for galvanizing steel

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09202952A (en) * 1996-01-25 1997-08-05 Kawasaki Steel Corp High workability galvanized steel sheet and its production
WO1998053109A1 (en) * 1997-05-23 1998-11-26 N.V. Union Miniere S.A. Alloy and process for galvanizing steel

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section Ch Week 199741, Derwent World Patents Index; Class M13, AN 1997-444209, XP002159784 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004079032A1 (en) * 2003-03-07 2004-09-16 N.V. Bekaert S.A. Zinc-nickel coating layer
CN107699836A (en) * 2017-10-16 2018-02-16 宜兴大平杆塔制造有限公司 A kind of galvanized method of power transmission line column

Also Published As

Publication number Publication date
BR0113801A (en) 2003-07-08
EP1325168A1 (en) 2003-07-09
WO2002022907A1 (en) 2002-03-21
AU2001295536A1 (en) 2002-03-26

Similar Documents

Publication Publication Date Title
KR100836282B1 (en) High-strength alloyed aluminum-system palted steel sheet
AU544400B2 (en) Zinc-aluminum alloys and coatings
EP1482066B1 (en) Surface treated steel plate and method for production thereof
NZ565969A (en) Hot dip Zn-Al based alloy plated steel product excellent in bending workability and method for production thereof
CN114787411B (en) Hot dip galvanized steel sheet excellent in bending workability and corrosion resistance and method for producing same
US11377712B2 (en) Hot dipped high manganese steel and manufacturing method therefor
US6187116B1 (en) Alloy and process for galvanizing steel
JP2012255204A (en) Surface treated steel sheet excellent in corrosion resistance after coating, method for producing the same, and automobile part produced using the same
US6458425B2 (en) Zinc alloys yielding anticorrosive coatings on ferrous materials
JP2825671B2 (en) Hot-dip Zn-Mg-Al-Sn plated steel sheet
JP2003013192A (en) Hot-dip galvanized steel sheet superior in formability
EP1186679A1 (en) Hot-dip galvanising alloy and process
JPH0681099A (en) Galvannealed steel sheet
JP3485410B2 (en) Manufacturing method of hot-dip aluminized steel sheet with excellent heat blackening resistance
WO1981002748A1 (en) Zinc-aluminum alloys and coatings
JP2004277839A (en) Zinc based metal-coated steel
JP3075318B2 (en) Alloyed hot-dip galvanized steel sheet
KR100478725B1 (en) Manufacturing Method of High Strength Alloying Hot-Dip Galvanized Steel Sheet with Excellent Plating Adhesion and Alloying Process
JP3838277B2 (en) Alloyed hot-dip galvanized steel sheet with excellent powdering resistance
JP3052835B2 (en) Galvannealed steel sheet
JPH0665700A (en) Hot-dip galvanizing steel sheet with high strength and high ductility
CN118140004A (en) Hot-pressed component
JP2003096540A (en) Steel sheet for galvannealing, and galvannealed steel sheet
NZ199491A (en) Aluminium-containing zinc alloy
JPH0835050A (en) Galvannealed steel and its production

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

AKX Designation fees paid
REG Reference to a national code

Ref country code: DE

Ref legal event code: 8566

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20020914