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EP0363784B1 - Flux pour galvanisation - Google Patents

Flux pour galvanisation Download PDF

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Publication number
EP0363784B1
EP0363784B1 EP89118277A EP89118277A EP0363784B1 EP 0363784 B1 EP0363784 B1 EP 0363784B1 EP 89118277 A EP89118277 A EP 89118277A EP 89118277 A EP89118277 A EP 89118277A EP 0363784 B1 EP0363784 B1 EP 0363784B1
Authority
EP
European Patent Office
Prior art keywords
weight
flux
zinc
aluminum
chloride
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
EP89118277A
Other languages
German (de)
English (en)
Other versions
EP0363784A1 (fr
Inventor
Hermann Dr. Meyer
Wilhelm Dr. Goesele
Harry Dr. Parthey
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.)
BASF SE
Original Assignee
BASF SE
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 BASF SE filed Critical BASF SE
Priority to AT89118277T priority Critical patent/ATE78879T1/de
Publication of EP0363784A1 publication Critical patent/EP0363784A1/fr
Application granted granted Critical
Publication of EP0363784B1 publication Critical patent/EP0363784B1/fr
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
    • C23C2/30—Fluxes or coverings on molten baths

Definitions

  • the present invention relates to a flux for hot-dip galvanizing, which is particularly suitable for galvanizing with zinc baths containing aluminum.
  • DE-B-2317600 describes a flux solution containing zinc chloride and aluminum chloride and / or hydrogen chloride, which additionally contains corrosion inhibitors known per se and optionally alkali metal chlorides.
  • corrosion inhibitors known per se and optionally alkali metal chlorides.
  • organic compounds in particular organic sulfur compounds, but also butynediol in amounts of from 0.01 to 0.1% by weight are used as corrosion inhibitors.
  • These fluxes are also not suitable for galvanizing with zinc baths that contain a lot of aluminum.
  • fluxes for galvanizing with aluminum-containing zinc baths which are used in the form of aqueous solutions, are described, which consist of 0.3 to 8 wt .-% SnCl2, 1 to 20 wt .-% organic acids such as tartaric acid , Citric acid and maleic acid, or mixtures of organic acids with acid fluorides, and 1 to 20 wt .-% alkali metal chlorides and the rest zinc chloride, exist (see also GB-C-2151259).
  • these fluxes contain acidic fluorides, they are Flux cannot be used for reasons of environmental protection, while fluoride-free fluxes also do not guarantee faultless galvanizing.
  • the object of the present invention was therefore to provide fluxes which can be used in particular for hot-dip galvanizing with zinc baths containing aluminum, which on the one hand lead to perfect galvanizing and on the other hand practically do not react with the aluminum contained in the baths.
  • this object can be achieved with a flux consisting of 70 to 90% by weight zinc chloride 4.5 to 20% by weight potassium chloride 0.4 to 5% by weight of butynediol 0 to 5% by weight of ammonium chloride and 0.1 to 1.5% by weight of a nonionic surfactant of the general formula R1OY x H in the R1 a saturated alkyl radical with 8 to 15 C atoms, or an alkylphenyl radical with 8 to 18 C atoms in the alkyl group, Y is a (-CH2-CH2-O -) - group and x is an integer from 5 to 20 means.
  • the fluxes according to the invention are used in the form of their aqueous solutions in concentrations of 20 to 50% by weight.
  • concentration of the flux depends on the material to be galvanized, whereby higher concentrations are required for thick-walled material. Concentrations of 30 to 45% by weight are preferably used.
  • the nonionic surfactants of the general formula R1OY x H contained in the fluxes according to the invention are ethoxylated alkylphenols or fatty alcohols, the aqueous solution of which is intended to wet the material to be galvanized.
  • the ethoxy group can also be partially replaced by a propoxy group to be replaced.
  • the proportion of the propoxy group should expediently not exceed 30 mol%.
  • the fluxes preferably have a zinc chloride content of 79 to 90% by weight, a potassium chloride content of 10 to 17% by weight, a butynediol content of 1 to 5% by weight and a surfactant content of 0.2 to 1.5% by weight.
  • the presence of ammonium chloride in the flux increases its activity.

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)
  • Respiratory Apparatuses And Protective Means (AREA)

Claims (3)

1. Flux pour la galvanisation à chaud, se composant de
70 à 90% en poids de chlorure de zinc,
4,5 à 20% en poids de chlorure de potassium,
0,4 à 5% en poids de butynediol
0 à 5% en poids de chlorure d'ammonium et
0,1 à 1,5% en poids d'un tenside non ionique de formule générale R₁OY x H
Figure imgb0008
 dans laquelle R₁ représente un reste alkyle saturé à 8-15 atomes de carbone ou un reste alkylphényle à 8-18 atomes de carbone dans le groupement alkyle, Y représente un groupement (-CH₂-CH₂-O-) et x représente un nombre entier de 5 à 20.
2. Flux selon la revendication 1, caractérisé en ce que le groupement (-CH₂-CH₂-O-) est remplacé en partie par un groupement
Figure imgb0009
3. Utilisation des flux selon les revendications 1 et 2 pour la galvanisation à sec avec des bains de zinc ayant une teneur en aluminium de 0,4 à 20% en poids.
EP89118277A 1988-10-12 1989-10-03 Flux pour galvanisation Expired - Lifetime EP0363784B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89118277T ATE78879T1 (de) 1988-10-12 1989-10-03 Flussmittel fuer die feuerverzinkung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3834733 1988-10-12
DE3834733A DE3834733A1 (de) 1988-10-12 1988-10-12 Flussmittel fuer die feuerverzinkung

Publications (2)

Publication Number Publication Date
EP0363784A1 EP0363784A1 (fr) 1990-04-18
EP0363784B1 true EP0363784B1 (fr) 1992-07-29

Family

ID=6364947

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89118277A Expired - Lifetime EP0363784B1 (fr) 1988-10-12 1989-10-03 Flux pour galvanisation

Country Status (3)

Country Link
EP (1) EP0363784B1 (fr)
AT (1) ATE78879T1 (fr)
DE (2) DE3834733A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006123945A1 (fr) * 2005-05-19 2006-11-23 Fletcher Building Holdings Limited Procedures de galvanisation
CN103834888A (zh) * 2014-03-13 2014-06-04 昆明理工大学 一种热浸镀用无氨助镀剂及其使用方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH079056B2 (ja) * 1990-11-30 1995-02-01 田中亜鉛鍍金株式会社 乾式フラックス法による溶融金属めっき用フラックス及びこのフラックスを用いた溶融金属めっき鋼材の製造方法
EP2035594A4 (fr) * 2006-06-09 2010-12-08 Teck Cominco Metals Ltd Alliage à haute teneur en aluminium pour galvanisation générale

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE335274A (fr) * 1925-08-18 1926-08-31 Tadeusz Liban Procede pour la fabrication de revetements meatlliques
GB1040958A (en) * 1963-07-26 1966-09-01 William Blythe And Company Ltd Improvements in and relating to galvanising fluxes
US3321339A (en) * 1965-05-07 1967-05-23 Du Pont Galvanizing flux
DE2117859C3 (de) * 1971-04-13 1980-01-31 Siemens Ag, 1000 Berlin Und 8000 Muenchen Verfahren zum Feuerverzinnen oder Weichlöten von schlecht benetzbaren Werkstoffen
DE2317600C3 (de) * 1973-04-07 1975-08-28 Basf Ag, 6700 Ludwigshafen Wäßerige Flußmittellösungen für die Feuerverzinkung

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006123945A1 (fr) * 2005-05-19 2006-11-23 Fletcher Building Holdings Limited Procedures de galvanisation
CN103834888A (zh) * 2014-03-13 2014-06-04 昆明理工大学 一种热浸镀用无氨助镀剂及其使用方法

Also Published As

Publication number Publication date
DE58901945D1 (de) 1992-09-03
EP0363784A1 (fr) 1990-04-18
DE3834733A1 (de) 1990-04-19
ATE78879T1 (de) 1992-08-15

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