EP0879901B1 - Revêtement de protection de pièces métalliques ayant une bonne résistance à la corrosion en atmosphère saline, et pièces métalliques comportant un tel revêtement de protection. - Google Patents
Revêtement de protection de pièces métalliques ayant une bonne résistance à la corrosion en atmosphère saline, et pièces métalliques comportant un tel revêtement de protection. Download PDFInfo
- Publication number
- EP0879901B1 EP0879901B1 EP98401213A EP98401213A EP0879901B1 EP 0879901 B1 EP0879901 B1 EP 0879901B1 EP 98401213 A EP98401213 A EP 98401213A EP 98401213 A EP98401213 A EP 98401213A EP 0879901 B1 EP0879901 B1 EP 0879901B1
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- European Patent Office
- Prior art keywords
- zinc
- coating
- tin
- protective coating
- alloy
- Prior art date
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Classifications
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- 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
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/02—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material
- C23C28/021—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material including at least one metal alloy layer
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- 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
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/02—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material
- C23C28/023—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material only coatings of metal elements only
- C23C28/025—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material only coatings of metal elements only with at least one zinc-based layer
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/56—Electroplating: Baths therefor from solutions of alloys
- C25D3/565—Electroplating: Baths therefor from solutions of alloys containing more than 50% by weight of zinc
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/56—Electroplating: Baths therefor from solutions of alloys
- C25D3/60—Electroplating: Baths therefor from solutions of alloys containing more than 50% by weight of tin
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- 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
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S428/00—Stock material or miscellaneous articles
- Y10S428/922—Static electricity metal bleed-off metallic stock
- Y10S428/9265—Special properties
- Y10S428/933—Sacrificial component
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- 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
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12535—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.] with additional, spatially distinct nonmetal component
- Y10T428/12611—Oxide-containing component
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- 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
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12708—Sn-base component
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- 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
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12771—Transition metal-base component
- Y10T428/12785—Group IIB metal-base component
- Y10T428/12792—Zn-base component
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- 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
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12771—Transition metal-base component
- Y10T428/12785—Group IIB metal-base component
- Y10T428/12792—Zn-base component
- Y10T428/12799—Next to Fe-base component [e.g., galvanized]
Definitions
- the invention relates to a protective coating for parts. metal having good corrosion resistance in saline atmosphere and a metal part comprising such a coating. It applies in particular to protection aeronautical steel parts such as aircraft engines that require a high degree of safety and protection of aluminum alloy parts beforehand coated with a chemical zincate undercoat.
- cadmium deposited by the electrolytic as a protective anodic coating. This coating can be used hot up to temperatures of around 235 ° C.
- cadmium presents a risk of corrosion intergranular with cracks on contact with titanium and its alloys, and catalytic actions unfavorable in contact with synthetic oils and fuels.
- Document JP 05033 188A describes a process for preparing a coating multilayer comprising on a steel substrate, a layer of tin, a layer of zinc and nickel alloy and a layer of tin and zinc.
- Sheet steel coated is used to produce boxes.
- the coating requiring three successive layers is expensive to make and increases the weight of coated parts significantly, which is detrimental in the case of application to aeronautical parts where one always seeks to obtain gains in mass.
- the invention aims to develop a protective coating a metal part not containing cadmium, constituting an effective anodic protection against corrosion in a saline atmosphere and in alternating cycling, and having a low sensitivity to galvanic corrosion.
- the invention relates to a binary coating of an alloy of tin and zinc comprising 8 to 35% by weight zinc.
- the metal substrate is provided with a protective coating against corrosion resistance in saline atmosphere is characterized in that it comprises at minus a layer of a tin and zinc alloy containing between 8 and 35% by weight of zinc, an underlay of an alloy zinc and nickel containing between 10 and 16% by weight of nickel, the underlay being arranged between the part metal and the tin and zinc alloy layer, and the thickness proportion of the two alloys of the coating being two-thirds for the zinc-nickel alloy and one third for the tin and zinc alloy.
- the tin and zinc alloy comprises between 12 and 25% by weight of zinc.
- the coating further comprises a film chromate outer.
- the layer of tin and zinc alloy and / or the zinc and nickel alloy underlay are deposited by electrolysis.
- the invention also relates to a metal part comprising a protective coating against atmospheric corrosion saline.
- coating To constitute an effective coating for the protection of metal parts against salt corrosion, coating must behave anodically with respect to the substrate metallic, i.e. it must have a behavior sacrificial in relation to the substrate.
- the galvanic coupling between the coating and the substrate must be low to reduce the risk of sensitivity of the coating to galvanic corrosion and increase its duration of life.
- a binary electrolytic coating consisting of a alloy of tin and zinc comprising between 8 and 35% in weight of zinc and preferably between 12 and 25% by weight zinc, exhibits salt corrosion behavior satisfactory even under severe cycling conditions alternating, and weak galvanic coupling with a substrate metallic.
- the electrolytic coating of tin and zinc is used in a sandwich type coating. In that case it is deposited on a sub-layer of a zinc alloy of nickel comprising 10 to 16% by weight of nickel.
- the alloy of zinc and nickel is electrolytically deposited on the metallic substrate.
- the temperature range of the electrolysis bath is between 63 and 67 ° C; the range of cathodic current densities applied during electrolysis is between 1 and 3 A / dm 2 ; the range of applied voltages is between 2 and 5V.
- the anodes used are preferably tin-zinc alloy anodes, comprising for example 75% by weight of tin and 25% by weight of zinc.
- the composition of the electrolytic bath can be different; in particular, for health and safety reasons, the cyanide complexing agent can be replaced by an alkaline nitrogen complexing agent which is not cyanide comprising for example one or more amine functions and / or one or more amide functions.
- the electrolytic coating of zinc and nickel (10 to 16% by weight of nickel) is carried out using an electrolytic bath known under the commercial name Slotoloy ZN50.
- the additive with the trade name ZN51 is a complexing agent comprising amines; the trade name additives ZN52 and ZN53 are grain refiners.
- Zinc is introduced in the form of zinc oxide ZnO; nickel is introduced in the form of NiSO 4 , 6H 2 O.
- the anodes used are nickel anodes.
- the temperature range of the electrolysis bath is between 63 and 67 ° C; the range of cathodic current densities applied during electrolysis is between 1 and 3 A / dm 2 ; the range of applied voltages is between 3 and 6 V.
- Figure 1 represents a comparative table of the values of initial dissolution potentials and measured after one time t equal to 5 minutes, and the coupling value galvanic of different types of coatings made on steel substrates.
- Measuring electrochemical dissolution potentials assesses the risks of sensitivity to galvanic corrosion that may exist between a coating and the substrate on which it is deposited.
- galvanic coupling values greater than 250mV in the medium wet are likely to cause corrosion galvanic which results in a preferential attack of the coating if it has a sacrificial behavior by compared to the substrate on which it is deposited.
- the measurement of electrochemical potentials for dissolving materials or coatings shown in the table in Figure 1, is performed using an electronic multi-meter in using a saturated calomel reference electrode (noted ECS).
- the electrolyte used is a solution comprising 30 g / l of sodium chloride, 1.284 g / l of sodium phosphate and 0.187 g / l of boric acid.
- the pH of the solution electrolytic is maintained at 8 ⁇ 0.1 and the measurements are performed at room temperature.
- the coatings considered are a cadmium coating deposited on a XES steel substrate without chromic finish and followed by a chromic finish; a coating of a alloy of tin and zinc comprising 8 to 35% by weight of zinc deposited on an unfinished XES steel substrate chromic and followed by a chromic finish; a coating of an alloy of zinc and nickel comprising 10 to 16% in nickel weight followed by a chrome finish.
- the coating of cadmium is used as a reference.
- the values of measured electrochemical dissolution potentials show that all coatings have a sacrificial behavior, the steel substrate provided with one of the coatings considered being more anodic than steel alone.
- the low galvanic coupling value between XES steel and a coating of a tin and zinc alloy containing 8 to 35% by weight of zinc suggests a long service life of this type of coating.
- FIG. 1 also shows that the deposition of a film of chromate, called chromic finish, on the coating of protection is particularly advantageous because it allows significantly reduce the value of the galvanic coupling between the steel substrate and the coating and thereby increase considerably the life of the coating.
- chromic finish a film of chromate
- Coating resistance tests in the presence of fog saline and alternating cycling were performed for all coatings considered in Figure 1 as well as for a additional coating, called sandwich coating, comprising a first layer consisting of a coating electrolytic alloy of zinc and nickel comprising 10 to 16% by weight of nickel and a second layer made of an electrolytic coating of an alloy tin and zinc comprising 8 to 35% by weight of zinc.
- the thicknesses of all the coverings considered are between 10 and 15 ⁇ m.
- cadmium coatings have excellent behavior in the presence of fog saline. After 336 hours of exposure, no corrosion of the steel substrate is not observed, which confirms the protective effect of this coating with respect to steel.
- the electrolytic coating of an alloy of zinc and nickel comprising 10 to 16% by weight of nickel and the electrolytic coatings of a tin and zinc alloy containing 8 to 35% by weight of zinc have behaviors similar in the presence of salt spray. From 216 hours of exposure to salt spray, fine drips of white corrosion appear, but these do not evolve not over time. After 336 hours of exposure to salt spray, no attack on the steel substrate is observed.
- the Zn - Ni coatings (10 to 16% by weight Ni), Sn - Zn (8 to 35% by weight Zn) and sandwich 2/3 Zn - Ni (10 to 16% by weight Ni) + 1/3 Sn - Zn (8 to 35% by weight Zn) have very close behavior in salt corrosion up to 336 hours of exposure to salt spray.
- Results obtained after exposure to salt spray are frequently different from the corrosion observed during exposure to the Earth's atmosphere. This is due to cyclical variations in climatic conditions and particular humidity, temperature, exposure to sunlight.
- Each cycle consists of exposing a given material for 15 hours in salt spray at a temperature of 35 ° C, then at place this material at a predetermined high temperature for 6 hours.
- High temperature is chosen lower than the melting point of the different elements of the coating.
- the temperature high is chosen equal to 235 ° C; for coating containing a tin and zinc alloy and the coating sandwich, the high temperature is chosen equal to 150 ° C in because of the low melting point of tin.
- the behavior, in alternating cycling, of the coating electrolytic alloy of tin and zinc comprising 8 to 35% by weight of zinc is similar to the behavior of electrolytic coating of zinc and nickel alloy.
- 15 to 20% of the surface of the steel substrate is attacked by white corrosion.
- the sandwich coating has the best behavior in saline corrosion and in alternating cycling compared to the zinc-nickel and tin-zinc coatings considered and constitutes an effective protection against corrosion of a steel part when the latter is used in severe conditions.
- Zinc-nickel and tin-zinc coatings can also be used as protective coatings on steel parts, in cases where the conditions of use of the parts are less severe.
- Zinc-nickel and tin-zinc coatings can also be applied to metal parts other than steel, such as, for example, aluminum alloy parts previously coated with an underlayer of chemical zincate.
- the invention is not limited to the examples of embodiments precisely described; in particular the choice of an electrolytic route for depositing the alloys of the coating is advantageous in terms of the cost of producing the deposit and makes it possible to control the concentration of the elements of the alloy in a simple manner by choosing a density value of cathodic current applied during electrolysis and by the choice of an applied voltage value, but the deposition of the alloys considered can also be carried out by any other known method.
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- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Electroplating Methods And Accessories (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Electroplating And Plating Baths Therefor (AREA)
- Coating With Molten Metal (AREA)
- Laminated Bodies (AREA)
Description
- la figure 1, un tableau comparatif indiquant les valeurs des potentiels de dissolution et les valeurs de couplage galvanique de différents types de revêtements réalisés sur des substrats en acier ;
- la figure 2, un tableau rappelant la composition de deux types d'aciers considérés ;
- la figure 3, un tableau comparatif résumant les résultats obtenus pour les différents types de revêtements considérés lors d'essais de tenue en présence de brouillard salin et en cyclage alterné.
Le revêtement sandwich permet d'obtenir une double protection des pièces métalliques contre la corrosion saline, il permet d'augmenter la résistance à la corrosion en diminuant le couplage galvanique du revêtement par rapport au substrat métallique. L'alliage de zinc et de nickel est utilisé de préférence en sous-couche pour améliorer l'adhérence du revêtement sur la pièce métallique.
Le revêtement d'étain et de zinc ou de type sandwich peut comporter en outre un film externe de chromate permettant d'améliorer encore la tenue du revêtement en corrosion saline.
Les dépôts électrolytiques de l'alliage d'étain et de zinc et/ou de l'alliage de zinc et de nickel sont réalisés en utilisant des bains électrolytiques ne comportant aucun agent d'addition de type brillanteur organique ou métallique, car ces agents d'addition sont source de fragilisation par l'hydrogène.
Le revêtement électrolytique d'étain et de zinc est déposé en utilisant un bain dont un exemple de composition est donné ci-dessous :
- stannate de sodium : de 30 à 75 g/l et de préférence 67 g/l
- cyanure de zinc : de 2 à 10 g/l et de préférence 5,4 g/l
- soude : de 2 à 10 g/l et de préférence 5 g/l
- cyanure de sodium : de 15 à 45 g/l et de préférence 28 g/l
Les anodes utilisées sont de préférence des anodes d'étain-zinc alliés, comportant par exemple 75 % en poids d'étain et 25 % en poids de zinc.
La composition du bain électrolytique peut être différente ; en particulier, pour des raisons d'hygiène et de sécurité, le complexant cyanure peut être remplacé par un complexant alcalin azoté non cyanuré comportant par exemple une ou plusieurs fonctions amines et/ou une ou plusieurs fonctions amides.
Le revêtement électrolytique de zinc et de nickel (10 à 16 % en poids de nickel) est effectué en utilisant un bain électrolytique connu sous le nom commercial Slotoloy ZN50.
- soude : 12,5 g/l
- zinc : 7,5 g/l
- nickel : 1,3 g/l
- ZN51 : 40 ml/l
- ZN52 : 75 ml/l
- ZN53 : 5 ml/l
Les revêtements zinc-nickel et étain-zinc peuvent également être utilisés en tant que revêtements protecteurs de pièces en acier, dans des cas où les conditions d'utilisation des pièces sont moins sévères.
Les revêtements zinc-nickel et étain-zinc peuvent également être appliqués sur des pièces métalliques autres que l'acier, telles que par exemple, des pièces en alliage d'aluminium préalablement revêtues d'une sous-couche de zincate chimique. L'invention n'est pas limitée aux exemples de réalisations précisément décrits ; en particulier le choix d'une voie électrolytique pour déposer les alliages du revêtement est avantageuse au niveau du coût de réalisation du dépôt et permet de contrôler de façon simple la concentration des éléments de l'alliage par le choix d'une valeur de densité de courant cathodique appliquée pendant l'électrolyse et par le choix d'une valeur de tension appliquée, mais le dépôt des alliages considérés peut également être effectué par toute autre méthode connue.
Claims (9)
- substrat métallique muni d'un revêtement de protecton contre la corrosion en atmosphère saline, caractérisé en ce qu'il comporte au moins une couche d'un alliage d'étain et de zinc contenant entre 8 et 35 % en poids de zinc, une sous-couche d'un alliage de zinc et de nickel contenant entre 10 et 16 % en poids de nickel, la sous-couche étant disposée entre la pièce métallique et la couche d'alliage d'étain et de zinc, et la proportion en épaisseur des deux alliages du revêtement étant de deux tiers pour l'alliage de zinc et de nickel et de un tiers pour l'alliage d'étain et de zinc.
- Substrat métallique muni d'un revêtement de protection de pièces métalliques selon la revendication 1, caractérisé en ce que la couche d'alliage d'étain et de zinc comporte entre 12 et 25 % en poids de zinc.
- Substrat métallique muni d'un revêtement de protection de pièces métalliques selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comporte en outre un film externe de chromate.
- Substrat métallique muni d'un revêtement de protection de pièces métalliques selon l'une quelconque des revendications précédentes, caractérisé en ce que la couche d'alliage d'étain et de zinc et/ou la sous-couche d'alliage de zinc et de nickel sont déposées par électrolyse.
- Substrat métallique muni d'un revêtement de protection de pièces métalliques selon la revendication 4, caractérisé en ce que les dépôts électrolytiques de l'alliage d'étain et de zinc et/ou de l'alliage de zinc et de nickel sont réalisés en utilisant des bains électrolytiques ne comportant aucun agent d'addition de type brillanteur organique ou métallique.
- Substrat métallique muni d'un revêtement de protection de pièces métalliques selon la revendication 5, caractérisé en ce que la composition du bain électrolytique utilisé pour le dépôt de l'alliage d'étain et de zinc est la suivante :stannate de sodium : 67 g/lcyanure de zinc : 5,4 g/lsoude : 5 g/lcyanure de sodium : 28 g/l
- Substrat métallique muni d'un revêtement de protection de pièces métalliques selon la revendication 6, caractérisé en ce que le complexant cyanure, utilisé dans le cyanure de zinc et le cyanure de sodium, est remplacé par un complexant alcalin azoté non cyanuré.
- Substrat métallique muni d'un revêtement de protection de pièces métalliques selon l'une quelconque des revendications 4 à 6, caractérisé en ce que le dépôt électrolytique de l'alliage d'étain et de zinc est effectué en utilisant des anodes d'étain-zinc alliés.
- Pièce métallique comportant un revêtement de protection contre la corrosion en atmosphère saline, selon l'une quelconque des revendications précédentes.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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FR9706232A FR2763605B1 (fr) | 1997-05-22 | 1997-05-22 | Revetement de protection de pieces metalliques ayant une bonne resistance a la corrosion en atmosphere saline, et pieces metalliques comportant un tel revetement de protection |
FR9706232 | 1997-05-22 |
Publications (2)
Publication Number | Publication Date |
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EP0879901A1 EP0879901A1 (fr) | 1998-11-25 |
EP0879901B1 true EP0879901B1 (fr) | 2002-03-20 |
Family
ID=9507103
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98401213A Expired - Lifetime EP0879901B1 (fr) | 1997-05-22 | 1998-05-20 | Revêtement de protection de pièces métalliques ayant une bonne résistance à la corrosion en atmosphère saline, et pièces métalliques comportant un tel revêtement de protection. |
Country Status (7)
Country | Link |
---|---|
US (1) | US5989735A (fr) |
EP (1) | EP0879901B1 (fr) |
JP (1) | JP3340386B2 (fr) |
CA (1) | CA2238061C (fr) |
DE (1) | DE69804267T2 (fr) |
ES (1) | ES2171003T3 (fr) |
FR (1) | FR2763605B1 (fr) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE29801049U1 (de) * | 1998-01-22 | 1998-04-30 | Emhart Inc | Karosseriebauteil mit einer Zinn-Zink-Beschichtung |
US6368486B1 (en) * | 2000-03-28 | 2002-04-09 | E. I. Du Pont De Nemours And Company | Low temperature alkali metal electrolysis |
FR2856172A1 (fr) * | 2003-06-16 | 2004-12-17 | Neopost Ind | Machine d'affranchissement a dispositif d'alimentation en encre integre |
US8021744B2 (en) | 2004-06-18 | 2011-09-20 | Borgwarner Inc. | Fully fibrous structure friction material |
US8088498B2 (en) * | 2007-05-23 | 2012-01-03 | Hamilton Sundstrand Corporation | Electro-formed sheath for use on airfoil components |
EP2233611A1 (fr) * | 2009-03-24 | 2010-09-29 | MTV Metallveredlung GmbH & Co. KG | Système de couche doté d'une résistance améliorée à la corrosion |
US20130192982A1 (en) * | 2012-02-01 | 2013-08-01 | United Technologies Corporation | Surface implantation for corrosion protection of aluminum components |
JP5858198B2 (ja) * | 2013-10-18 | 2016-02-10 | 新日鐵住金株式会社 | めっき鋼材、塗装鋼材及びめっき鋼材の製造方法 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2675347A (en) * | 1951-10-15 | 1954-04-13 | Metal & Thermit Corp | Plating of tin-zinc alloys |
JPS63290292A (ja) * | 1987-05-20 | 1988-11-28 | Nippon Steel Corp | 耐錆性、溶接性に優れた薄Snメツキ鋼板の製造方法 |
US5275892A (en) * | 1987-11-05 | 1994-01-04 | Whyco Chromium Company, Inc. | Multi-layer corrosion resistant coating for fasteners and method of making |
GB2230537B (en) * | 1989-03-28 | 1993-12-08 | Usui Kokusai Sangyo Kk | Heat and corrosion resistant plating |
AU8521691A (en) * | 1990-08-31 | 1992-03-30 | Barry, Beresford Thomas Kingcome | Electroplating |
JPH0533188A (ja) * | 1991-07-30 | 1993-02-09 | Nippon Steel Corp | 耐錆性と外観性の優れた容器用表面処理鋼板 |
US5491035A (en) * | 1992-03-27 | 1996-02-13 | The Louis Berkman Company | Coated metal strip |
-
1997
- 1997-05-22 FR FR9706232A patent/FR2763605B1/fr not_active Expired - Fee Related
-
1998
- 1998-05-18 US US09/080,238 patent/US5989735A/en not_active Expired - Lifetime
- 1998-05-19 CA CA002238061A patent/CA2238061C/fr not_active Expired - Lifetime
- 1998-05-20 DE DE69804267T patent/DE69804267T2/de not_active Expired - Lifetime
- 1998-05-20 ES ES98401213T patent/ES2171003T3/es not_active Expired - Lifetime
- 1998-05-20 EP EP98401213A patent/EP0879901B1/fr not_active Expired - Lifetime
- 1998-05-22 JP JP14191798A patent/JP3340386B2/ja not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0879901A1 (fr) | 1998-11-25 |
FR2763605A1 (fr) | 1998-11-27 |
FR2763605B1 (fr) | 1999-07-02 |
JPH10330964A (ja) | 1998-12-15 |
ES2171003T3 (es) | 2002-08-16 |
US5989735A (en) | 1999-11-23 |
DE69804267T2 (de) | 2002-11-21 |
CA2238061C (fr) | 2005-07-12 |
CA2238061A1 (fr) | 1998-11-22 |
JP3340386B2 (ja) | 2002-11-05 |
DE69804267D1 (de) | 2002-04-25 |
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