BE828787A - IMPROVEMENT OF THE SURFACE TREATMENT PROCESS OF CERTAIN STEELS PREPARATORY FOR HOT GALVANIZATION AND STEELS RESULTING FROM THIS TREATMENT - Google Patents
IMPROVEMENT OF THE SURFACE TREATMENT PROCESS OF CERTAIN STEELS PREPARATORY FOR HOT GALVANIZATION AND STEELS RESULTING FROM THIS TREATMENTInfo
- Publication number
- BE828787A BE828787A BE2054328A BE2054328A BE828787A BE 828787 A BE828787 A BE 828787A BE 2054328 A BE2054328 A BE 2054328A BE 2054328 A BE2054328 A BE 2054328A BE 828787 A BE828787 A BE 828787A
- Authority
- BE
- Belgium
- Prior art keywords
- steels
- improvement
- treatment
- preparatory
- lead
- Prior art date
Links
- 229910000831 Steel Inorganic materials 0.000 title claims description 18
- 239000010959 steel Substances 0.000 title claims description 18
- 238000000034 method Methods 0.000 title claims description 9
- 238000004381 surface treatment Methods 0.000 title claims description 4
- 150000003839 salts Chemical class 0.000 claims description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 238000005246 galvanizing Methods 0.000 claims description 5
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 230000004907 flux Effects 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 2
- 238000000746 purification Methods 0.000 claims description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical group [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 7
- 239000011701 zinc Substances 0.000 description 7
- 229910052725 zinc Inorganic materials 0.000 description 7
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 229910001297 Zn alloy Inorganic materials 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
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
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
-
- 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
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
- C23C2/024—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by cleaning or etching
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)
Description
"Perfectionnement au procédé de traitement de surface de certains aciers préparatoire à la galvanisation à chaud et aciers résultant de ce traitement" On a déjà proposé dtaméliorer la galvanisation des aciers au silicium notamment en modifiant la composition des bains de zinc et en procédant à la galvanisation à haute température, c'est-à-dire de l'ordre,:de 550 à 600[deg.]C. En ce qui concerne la composition des bains de zinc, on est arrivé à d'excellents résultats en augmentant sensiblement la teneur du zinc en aluminium. Malheureusement, dans ce cas, il est impossible de galvaniser normalement un acier effervescent. En effet, la teneur élevée en aluminium freine la formation des différentes couches d'alliage Fe-Zn ce qui est admissible pour le traitement d'un acier calmé mais ne l'est pas pour un acier effervescent.
En ce qui concerne les températures élevées, il est important de les réduire attendu qu'en pratique on ne peut
<EMI ID=1.1>
sous peine de destruction de la cuve elle-même et d'une abondante formation de mattes.
Le but de l'invention est d'écarter systématiquement ces inconvénients par un traitement préparatoire tel, que la galvanisation à chaud des aciers au silicium, puisse s'effectuer d'une manière normale. Les perfectionnements selon l'invention sont caractérisés par le fait que les pièces métalliques, débarrassées des oxydes, sont trempées dans une solution de sel de plomb ou d'un sel d'autre métal, par exemple étain, antimoine, cuivre, nickel..., susceptible d'être déplacé (cémenté, réduit à l'état métallique) par l'acier à traiter. La pièce d'acier ainsi recouverte de plomb métal et/ou de sel de plomb est ensuite plongée dans une solution de flux habituelle, puis galvanisée.
Comme le dépôt de plomb métallique par cémentation libère du fer qui passe en solution, il faudra régulièrement procéder à l'épuration du fer de la solution renfermant le sel de plomb. Ce traitement préparatoire pourra être appliqué de toute manière convenante pour autant que la pièce soit traitée avant, pendant ou
après par une solution d'un sel de plomb de manière à la recouvrir d'une pellicule de plomb métallique et/ou d'un
film formé par le sel de plomb utilisé. Ce traitement préparatoire de l'acier sera appliqué avant ou pendant le fluxage, celui-ci étant réalisé en solution ou en milieu fondu.
Cette invention est d'autant plus pertinente que l'on constate que l'industrie du zinc produit et fournit
de plus en plus du zinc électrolytique pratiquement pur
aux galvanisateurs. Or, il est recommandé aux galvanisateurs de prévoir, dans le zinc, une certaine proportion de plomb
<EMI ID=2.1>
Le procédé perfectionné selon la présente invention présente donc l'avantage d'apporter régulièrement du plomb dans le zinc et d'en améliorer ainsi la caractéristique dans plusieurs types de galvanisation.
L'invention concerne aussi bien les perfectionnements au procédé de traitement préparatoire que toutes pièces en acier auxquelles ledit-procédé perfectionné aura été appliqué.
REVENDICATIONS
1.- Perfectionnement au procédé de traitement de surface de certains aciers préparatoire à la galvanisation
à chaud, caractérisé en ce qu'il consiste à traiter la pièce par une solution d'un sel de plomb de manière à la recouvrir d'une pellicule de plomb métallique et/ou d'un film formé
par le sel de plomb utilisé, ladite pièce étant ensuite soumise au fluxage puis à la galvanisation à chaud normale.
2.- Perfectionnement au procédé de traitement
"Improvement in the process of surface treatment of certain steels preparatory to hot-dip galvanizing and steels resulting from this treatment" It has already been proposed to improve the galvanization of silicon steels in particular by modifying the composition of the zinc baths and by proceeding with the galvanization at high temperature, that is to say of the order: from 550 to 600 [deg.] C. As regards the composition of the zinc baths, excellent results have been obtained by appreciably increasing the content of the zinc in aluminum. Unfortunately, in this case, it is impossible to galvanize an effervescent steel normally. This is because the high aluminum content slows down the formation of the various Fe-Zn alloy layers, which is admissible for the treatment of a calmed steel but is not so for an effervescent steel.
With regard to high temperatures, it is important to reduce them, since in practice it is not possible to
<EMI ID = 1.1>
under penalty of destruction of the tank itself and an abundant formation of mattes.
The aim of the invention is to systematically eliminate these drawbacks by a preparatory treatment such that the hot-dip galvanizing of silicon steels can be carried out in a normal manner. The improvements according to the invention are characterized by the fact that the metal parts, freed from oxides, are soaked in a solution of lead salt or a salt of another metal, for example tin, antimony, copper, nickel. ., capable of being displaced (case-hardened, reduced to the metallic state) by the steel to be treated. The piece of steel thus covered with lead metal and / or lead salt is then immersed in a usual flux solution, then galvanized.
As the deposit of metallic lead by cementation releases iron which goes into solution, it will be necessary to regularly proceed to the purification of the iron from the solution containing the lead salt. This preparatory treatment may be applied in any suitable manner provided that the part is treated before, during or
afterwards by a solution of a lead salt so as to cover it with a metallic lead film and / or a
film formed by the lead salt used. This preparatory treatment of the steel will be applied before or during fluxing, the latter being carried out in solution or in a molten medium.
This invention is all the more relevant given that the zinc industry produces and supplies
more and more practically pure electrolytic zinc
to galvanizers. However, it is recommended that galvanizers include a certain proportion of lead in the zinc
<EMI ID = 2.1>
The improved process according to the present invention therefore has the advantage of regularly supplying lead in the zinc and thus improving its characteristic in several types of galvanization.
The invention relates both to improvements to the preparatory treatment process and to all steel parts to which said improved process has been applied.
CLAIMS
1.- Improvement in the surface treatment process of certain steels in preparation for galvanization
hot, characterized in that it consists in treating the part with a solution of a lead salt so as to cover it with a metallic lead film and / or a formed film
by the lead salt used, said part then being subjected to fluxing and then to normal hot-dip galvanizing.
2.- Improvement of the treatment process
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE2054328A BE828787A (en) | 1975-05-07 | 1975-05-07 | IMPROVEMENT OF THE SURFACE TREATMENT PROCESS OF CERTAIN STEELS PREPARATORY FOR HOT GALVANIZATION AND STEELS RESULTING FROM THIS TREATMENT |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE828787 | 1975-05-07 | ||
| BE2054328A BE828787A (en) | 1975-05-07 | 1975-05-07 | IMPROVEMENT OF THE SURFACE TREATMENT PROCESS OF CERTAIN STEELS PREPARATORY FOR HOT GALVANIZATION AND STEELS RESULTING FROM THIS TREATMENT |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE828787A true BE828787A (en) | 1975-09-01 |
Family
ID=25657551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE2054328A BE828787A (en) | 1975-05-07 | 1975-05-07 | IMPROVEMENT OF THE SURFACE TREATMENT PROCESS OF CERTAIN STEELS PREPARATORY FOR HOT GALVANIZATION AND STEELS RESULTING FROM THIS TREATMENT |
Country Status (1)
| Country | Link |
|---|---|
| BE (1) | BE828787A (en) |
-
1975
- 1975-05-07 BE BE2054328A patent/BE828787A/en unknown
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