EP0148740A1 - Verfahren zum heissen Beschichten und Schmelzbad dafür - Google Patents

Verfahren zum heissen Beschichten und Schmelzbad dafür Download PDF

Info

Publication number
EP0148740A1
EP0148740A1 EP84870195A EP84870195A EP0148740A1 EP 0148740 A1 EP0148740 A1 EP 0148740A1 EP 84870195 A EP84870195 A EP 84870195A EP 84870195 A EP84870195 A EP 84870195A EP 0148740 A1 EP0148740 A1 EP 0148740A1
Authority
EP
European Patent Office
Prior art keywords
bath
weight
zinc
lanthanum
cerium
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Withdrawn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
EP84870195A
Other languages
English (en)
French (fr)
Inventor
Dimitri Coutsouradis
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.)
Centre de Recherches Metallurgiques CRM ASBL
Original Assignee
Centre de Recherches Metallurgiques CRM ASBL
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
Priority claimed from BE6/47914A external-priority patent/BE898543A/fr
Application filed by Centre de Recherches Metallurgiques CRM ASBL filed Critical Centre de Recherches Metallurgiques CRM ASBL
Publication of EP0148740A1 publication Critical patent/EP0148740A1/de
Withdrawn legal-status Critical Current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
    • C23C2/12—Aluminium or alloys based thereon
    • 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 hot coating process for steel products using a zinc-aluminum alloy with a high aluminum content. It also relates to a coating alloy having an improved composition.
  • the invention applies in particular, without however being limited thereto, in the case of continuous galvanizing of steel strips.
  • J n of these alloys which is particularly interesting with regard to protection against corrosion, is that which contains 55% aluminum and 1.5% silicon.
  • the products to be coated by this process are subjected to preheating in a reducing atmosphere, at a temperature allowing the reduction of surface impurities (oxides, oil film), and that they are then cooled to a temperature close to that of the coating bath, in order to avoid cooling thereof.
  • this preheating must be carried out under a protective atmosphere, composed of nitrogen and hydrogen, having a particularly low dew point, preferably less than -30 ° C. This condition obviously results in a significant increase in the cost price of the products thus coated.
  • the coatings obtained with these alloys often have defects, in particular shortages or insufficient materials. In the case of a continuously coated strip, these defects are manifested both on the faces and on the wafer. These defects are extremely troublesome, since they compromise the corrosion resistance of the coated product.
  • the subject of the present invention is a method and an alloy composition which makes it possible to remedy these drawbacks.
  • the hot coating process which is the subject of the present invention, in which a steel product is immersed in a zinc bath containing 24 to 80% of aluminum and possibly at most 5% of silicon, is essentially characterized in that at least one alkaline earth element chosen from the group containing beryllium, magnesium, calcium, barium and strontium is added to said zinc bath, each of which can be added individually in the proportions following: their overall content however being between 0.005% and 0.5% by weight of the bath.
  • the content of the zinc bath in each of these rare earth elements added individually is advantageously between 0.001% and 0.5%.
  • the content of each of them, and in particular the lanthanum and / or cerium contents are, according to the invention, advantageously between 0.005% and 0 ,30 %.
  • Mischmetall is a generic term designating a series of mixtures made up of several rare earths.
  • cerium-rich mischmetall containing 45 to 60% of cerium, 35 to 50% of other rare earths and residual contents, less than 0.5%, in elements such as iron, magnesium, aluminum, silicon or impurities.
  • lanthanum-rich mischmetall containing 60 to 90% of lanthanum, 15 to 20% of other rare earths and the balance of which consists of elements such as iron, magnesium, aluminum, silicon or by impurities. .
  • the reference bath No. 1
  • the other baths No. 2 to 5
  • Defects of the type "lack or insufficiency of material" were noted on each sample and the value obtained was reported for each bath to that provided by the reference bath. These relative frequencies are also shown in the table below.
  • the coatings obtained with the alloys modified in accordance with the invention make it possible to very significantly reduce the frequency of defects by insufficient or lack of material.
  • the uniformity of the coatings, and therefore their quality, is thus greatly improved. This result was confirmed by corrosion tests in salt spray, as well as in SO 2 tank, which revealed better resistance to pitting corrosion.

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)
EP84870195A 1983-12-22 1984-12-21 Verfahren zum heissen Beschichten und Schmelzbad dafür Withdrawn EP0148740A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE6047914 1983-12-22
BE6/47914A BE898543A (fr) 1983-12-22 1983-12-22 Procédé de revetement à chaud et bain de composition améliorée pour sa mise en oeuvre.

Publications (1)

Publication Number Publication Date
EP0148740A1 true EP0148740A1 (de) 1985-07-17

Family

ID=3874935

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84870195A Withdrawn EP0148740A1 (de) 1983-12-22 1984-12-21 Verfahren zum heissen Beschichten und Schmelzbad dafür

Country Status (1)

Country Link
EP (1) EP0148740A1 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2660937A1 (fr) * 1990-04-13 1991-10-18 Centre Rech Metallurgique Procede pour le revetement au trempe d'une bande d'acier en continu.
BE1004077A3 (fr) * 1990-04-13 1992-09-22 Centre Rech Metallurgique Procede pour le revetement au trempe d'une bande d'acier en continu.
EP2455509A4 (de) * 2009-05-29 2014-05-14 Jfe Steel Corp Feuerverzinktes al-zn-plattiertes stahlblech
CN105543753A (zh) * 2016-03-14 2016-05-04 靖江新舟合金材料有限公司 一种含锶的锌铝合金锭
CN108441796A (zh) * 2018-04-18 2018-08-24 江苏克罗德科技有限公司 一种热镀锌铝镁合金钢板及其生产工艺
CN110343987A (zh) * 2019-07-30 2019-10-18 攀钢集团攀枝花钢钒有限公司 热浸镀锌铝合金镀层钢板/带及其生产方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1558489A1 (de) * 1967-06-15 1970-07-02 Erdmann Jesnitzer Dr Ing Habil Einstufenaetzfaehige Zinklegierungen
DE1771125A1 (de) * 1968-04-05 1971-12-16 Kernforschung Gmbh Ges Fuer Verfahren zur Herstellung von korrisionsgeschuetzen Huellrohren fuer Kernbrennstoffe
FR2218401A1 (de) * 1973-02-20 1974-09-13 Metallgesellschaft Ag
WO1981002748A1 (en) * 1980-03-25 1981-10-01 S Radtke Zinc-aluminum alloys and coatings
EP0037143A1 (de) * 1980-03-25 1981-10-07 CENTRE DE RECHERCHES METALLURGIQUES CENTRUM VOOR RESEARCH IN DE METALLURGIE Association sans but lucratif Schmelztauchverfahren
EP0042636A2 (de) * 1980-06-09 1981-12-30 CENTRE DE RECHERCHES METALLURGIQUES CENTRUM VOOR RESEARCH IN DE METALLURGIE Association sans but lucratif Verfahren zur Oberflächenbehandlung von durch einen Überzug geschützten Oberflächen
JPS58177450A (ja) * 1982-04-13 1983-10-18 Nisshin Steel Co Ltd 複合溶融めつき鋼板の製造方法

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1558489A1 (de) * 1967-06-15 1970-07-02 Erdmann Jesnitzer Dr Ing Habil Einstufenaetzfaehige Zinklegierungen
DE1771125A1 (de) * 1968-04-05 1971-12-16 Kernforschung Gmbh Ges Fuer Verfahren zur Herstellung von korrisionsgeschuetzen Huellrohren fuer Kernbrennstoffe
FR2218401A1 (de) * 1973-02-20 1974-09-13 Metallgesellschaft Ag
WO1981002748A1 (en) * 1980-03-25 1981-10-01 S Radtke Zinc-aluminum alloys and coatings
EP0037143A1 (de) * 1980-03-25 1981-10-07 CENTRE DE RECHERCHES METALLURGIQUES CENTRUM VOOR RESEARCH IN DE METALLURGIE Association sans but lucratif Schmelztauchverfahren
EP0042636A2 (de) * 1980-06-09 1981-12-30 CENTRE DE RECHERCHES METALLURGIQUES CENTRUM VOOR RESEARCH IN DE METALLURGIE Association sans but lucratif Verfahren zur Oberflächenbehandlung von durch einen Überzug geschützten Oberflächen
JPS58177450A (ja) * 1982-04-13 1983-10-18 Nisshin Steel Co Ltd 複合溶融めつき鋼板の製造方法

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
CHEMICAL ABSTRACTS, vol. 97, no. 16, octobre 1982, page 241, réf. no. 131282u, Columbus, Ohio, US; M. MEMMI et al.: "Study and development of new aluminum-zinc alloy coatings for steel sheets" & Metall. Ital. 1982, 74(3), 139-54 *
PATENTS ABSTRACTS OF JAPAN, vol. 8, no. 11 (C-205) [1448], 18 janvier 1984; & JP - A - 58 177 450 (NITSUSHIN SEIKOU K.K.) 18.10.1983 *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2660937A1 (fr) * 1990-04-13 1991-10-18 Centre Rech Metallurgique Procede pour le revetement au trempe d'une bande d'acier en continu.
BE1004077A3 (fr) * 1990-04-13 1992-09-22 Centre Rech Metallurgique Procede pour le revetement au trempe d'une bande d'acier en continu.
GB2243843B (en) * 1990-04-13 1993-10-06 Centre Rech Metallurgique Process for the continuous dip coating of a steel strip
EP2455509A4 (de) * 2009-05-29 2014-05-14 Jfe Steel Corp Feuerverzinktes al-zn-plattiertes stahlblech
CN105543753A (zh) * 2016-03-14 2016-05-04 靖江新舟合金材料有限公司 一种含锶的锌铝合金锭
CN108441796A (zh) * 2018-04-18 2018-08-24 江苏克罗德科技有限公司 一种热镀锌铝镁合金钢板及其生产工艺
CN108441796B (zh) * 2018-04-18 2020-01-10 江苏克罗德科技有限公司 一种热镀锌铝镁合金钢板及其生产工艺
CN110343987A (zh) * 2019-07-30 2019-10-18 攀钢集团攀枝花钢钒有限公司 热浸镀锌铝合金镀层钢板/带及其生产方法

Similar Documents

Publication Publication Date Title
FI70254C (fi) Zink-aluminiumbelaeggningar och foerfarande foer deras aostadkommande
FI61044C (fi) Legering foer galvanisering av staol
US20240093341A1 (en) Plated steel wire and manufacturing method for the same
EP0347727B1 (de) Verfahren zum Aufbringen einer schwarzen Beschichtung auf ein Substrat, sowie dadurch erhaltene schwarze Beschichtung
EP1583851B1 (de) Korrosionsbeständige polymetalldiffusionsbeschichtungen undverfahren zu deren aufbringung
EP0637637B1 (de) Verfahren zum Nitrieren von Werkstücken aus Eisen, mit verbesserten Korrosionswiderstand
US5518556A (en) Surface-hardened objects of alloys of platinum and palladium and method for their production
JP2001525890A (ja) 鋼を亜鉛めっきするための合金および方法
US7811674B2 (en) Hot-dip galvanizing bath and galvanized iron article
EP0037143B1 (de) Schmelztauchverfahren
JPS6128749B2 (de)
KR102031308B1 (ko) 도금강선 및 그 제조방법
JP2019531413A (ja) 低い液相線温度を有する改変された溶融亜鉛めっき被膜、その製造方法及び使用方法
FR2565250A1 (fr) Alliage riche en silicium resistant a la corrosion, procede de revetement d'un article substrat et article obtenu
CZ266498A3 (cs) Lázeň a způsob pro galvanizování ponorem
US3639107A (en) Hot-dip-aluminizing alloy
BE898543A (fr) Procédé de revetement à chaud et bain de composition améliorée pour sa mise en oeuvre.
JPH0397840A (ja) 合金化溶融亜鉛めっき鋼板
EP0579642B1 (de) Verfahren zur feuerverzinkung und legierung zur verwendung der feurverzinkung
JP2001020050A (ja) 未塗装加工部ならびに塗装端面部の耐食性に優れた溶融Ｚｎ−Ａｌ−Ｍｇめっき鋼材及びその製造方法
EP0042636A2 (de) Verfahren zur Oberflächenbehandlung von durch einen Überzug geschützten Oberflächen
JP3073679B2 (ja) 耐初期白錆性の優れた溶融Ｚｎ合金めっき鋼板
JPH02175853A (ja) ガルバナイジング浴組成物
EP0111039A1 (de) Verfahren zum kontinuierlichen Tauchverzinken und Anlassen eines Metalldrahtes mit grosser Geschwindigkeit
JPS6152337A (ja) 溶融亜鉛めつき用亜鉛合金

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

Designated state(s): AT DE FR GB IT LU NL SE

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

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Withdrawal date: 19851128

RIN1 Information on inventor provided before grant (corrected)

Inventor name: COUTSOURADIS, DIMITRI