EP2250301B1 - Procédé d'enduction pour une pièce à usiner - Google Patents

Procédé d'enduction pour une pièce à usiner Download PDF

Info

Publication number
EP2250301B1
EP2250301B1 EP09715063A EP09715063A EP2250301B1 EP 2250301 B1 EP2250301 B1 EP 2250301B1 EP 09715063 A EP09715063 A EP 09715063A EP 09715063 A EP09715063 A EP 09715063A EP 2250301 B1 EP2250301 B1 EP 2250301B1
Authority
EP
European Patent Office
Prior art keywords
coating
work piece
coating liquid
temperature
workpiece
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.)
Not-in-force
Application number
EP09715063A
Other languages
German (de)
English (en)
Other versions
EP2250301A1 (fr
Inventor
Thomas Kruse
Gerhard Reusmann
Sandra BÖHM
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.)
Ewald Doerken AG
Original Assignee
Ewald Doerken AG
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 Ewald Doerken AG filed Critical Ewald Doerken AG
Publication of EP2250301A1 publication Critical patent/EP2250301A1/fr
Application granted granted Critical
Publication of EP2250301B1 publication Critical patent/EP2250301B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • C25D3/66—Electroplating: Baths therefor from melts
    • C25D3/665—Electroplating: Baths therefor from melts from ionic liquids
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D17/00—Constructional parts, or assemblies thereof, of cells for electrolytic coating
    • C25D17/16—Apparatus for electrolytic coating of small objects in bulk
    • C25D17/28—Apparatus for electrolytic coating of small objects in bulk with means for moving the objects individually through the apparatus during treatment
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D21/00—Processes for servicing or operating cells for electrolytic coating
    • C25D21/16—Regeneration of process solutions
    • C25D21/18—Regeneration of process solutions of electrolytes
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/08—Electroplating with moving electrolyte e.g. jet electroplating
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/34—Pretreatment of metallic surfaces to be electroplated
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/48—After-treatment of electroplated surfaces

Definitions

  • the invention relates to a coating method for a workpiece and to a device for coating a workpiece.
  • the prior art also discloses those in which a workpiece is coated with a metal coating; which immediately adheres chemically or physically to the substrate.
  • a common way to realize this is the electrochemical deposition of the metal from a coating liquid in which a salt of this metal is dissolved.
  • the workpiece to be coated is immersed in a bath of the coating liquid. In most cases, the workpiece acts as a cathode, at which the metal ions are reduced.
  • a voltage is applied to the workpiece, on the basis of which the workpiece relative to a reference electrode has a predetermined, usually negative potential.
  • This method can be used to produce very well adhering, closed anticorrosive metal coatings, if necessary after suitable pretreatment of the workpiece.
  • metals semimetals and semiconductors, such as e.g. Silicon, deposit.
  • electrochemically coat non-metallic workpieces as long as their surface has been previously rendered conductive by a pre-treatment.
  • the deposition processes of oxygen on the one hand and hydrogen on the other hand define a potential range of about 2 V, within which the elements must be located that are suitable for coating in aqueous solution should be used. It is known from research that this disadvantage can be overcome by the use of another solvent.
  • ionic liquids These are salts which have a melting temperature of below 100 ° C. The corresponding molten salt can serve as a solvent for a salt of the desired coating metal.
  • the accessible potential range over water is increased from about 2V up to 6V according to the prior art.
  • the anions of the ionic liquid may be identical to those of the dissolved salt.
  • the US 2004/0238352 a process in which aluminum chloride is dissolved in a melt of 1-butyl-3-methylimidazolium chloride and elemental aluminum is precipitated from this solution.
  • the temperature of the workpiece is adjusted so that the temperature of the coating liquid deviates during the coating process by at most 10 ° C from a predetermined desired temperature.
  • the essential finding underlying the invention is that the life of an ionic liquid which is used as a coating liquid, is particularly stable and durable and thus industrially usable, if it is maintained in the range of a predetermined temperature, the target temperature, and although in a narrow framework, ie deviates by a maximum of 10 ° C from the setpoint temperature.
  • setpoint temperature denotes a precisely defined temperature considered optimal.
  • the temperature of the coating liquid-and thus the quality of the coating- is particularly influenced in the industrial process by the fact that usually in the individual coating process a large number of workpieces or a large workpiece is coated. Thus, due to the large mass of the workpiece (s), much heat is taken up from (or possibly released into) the coating liquid. This is even more so since metallic workpieces are generally characterized by good thermal conductivity and high specific heat capacity.
  • industrial plants usually operate in continuous operation, ie the coating processes of the individual batches follow each other without major breaks. It has therefore been found for the use of the ionic liquid in industrial coating process, that a constant temperature as possible Coating liquid prolongs the useful life of the ionic liquid for the coating and has an advantageous effect on the quality of the coating.
  • the adjustment of the temperature of the coating liquid is of particular importance.
  • heating and / or cooling of the workpiece to be coated either as a sole measure or in conjunction with the heating or tempering of the coating liquid is proposed.
  • the heating or tempering of the workpiece offers the advantage that precisely where the deposition takes place no unwanted cooling or heating of the coating liquid takes place through the workpiece. This ensures a good quality of the deposited layer.
  • the terms "heat” and “heat” are used in the following synonymous meaning, so are not different heat flows or different temperature ranges.
  • the process of the invention also prevents deterioration of the conductivity of the coating liquid due to temperature changes. This enables coating under steady state conditions which can produce a high quality metal layer which also meets premium requirements, such as e.g. in the automotive industry.
  • workpieces are preferably coated with a metallic surface, that is to say those which either consist entirely of metal, if appropriate also of an alloy, or which are provided with a metallic coating.
  • This metallic coating may also contain non-metallic components.
  • non-metallic surface workpieces may also be used, such as plastic parts prepared by activation for electroplating, the surface of which may e.g. was made conductive by pretreatment with a corresponding paint or is already conductive by additives in the plastic.
  • the ions of the at least one element to be deposited are metal ions.
  • ions of at least one of the elements aluminum, zinc, magnesium, nickel, chromium, tantalum, titanium, copper, silver and / or gold.
  • ions of semimetals or semiconductors in particular silicon and / or germanium ions, are also preferred.
  • metal layers are used for the sake of simplicity, but the statements basically refer to all layers of at least one element (according to claim 1).
  • the application of the coating liquid according to method step a) is usually done by immersing the workpiece in the coating liquid.
  • process step d To remove the excess liquid in process step d), various methods are possible, such as, for example, dripping, centrifuging or detaching by means of a (possibly tempered) air flow. The methods mentioned can also be combined.
  • the temperature of the workpiece is set such that the temperature of the coating liquid deviates during the coating process by at most 5 ° C from the predetermined target temperature for those cases in which a very accurate adherence to the target temperature is particularly critical.
  • the temperature of the coating liquid is significantly influenced by the contact with the workpiece.
  • One way to prevent an adverse influence of the workpiece is that the surface temperature is kept sufficiently constant in the range of the target temperature. Therefore, in a preferred development of the invention, it is ensured that the surface temperature of the workpiece deviates by at most 10 ° C. from the specified setpoint temperature during method steps a) -d). Maintaining this temperature range eliminates a significant disturbance factor in the deposition of metal layers from ionic liquids.
  • surface refers to all surfaces of the workpiece with which the coating liquid can come into contact.
  • the workpiece is heated for this purpose before and / or during the process steps a) - d) at least on its surface by means of hot air, infrared radiation, by blasting the surface, by contact with a heat bath or inductively.
  • warming is sufficient in advance may e.g. depend on the size or geometry of the workpiece. A large workpiece with a relatively small surface loses its initial temperature more slowly than a small workpiece with a relatively large surface area.
  • Heating with hot air offers the advantage that it can simultaneously act on all exposed surfaces, if necessary, several workpieces. Infrared radiation is advantageous because of the more efficient heat transfer. Inductive heating offers the advantage that not only a heating of the surface, but also the interior of the workpiece takes place. This method is also very efficient.
  • Heating by blasting e.g., blasting
  • the heating in a heat bath in which the workpiece is immersed, can optionally be combined with a degreasing o. ⁇ .
  • a degreasing o. ⁇ Of the workpiece in ebendiesem bathroom.
  • heating in a bath can be realized with relatively little technical effort, and good heat transfer to the workpiece is ensured.
  • the workpiece before and / or during the process steps a) - d) is cooled at least on its surface by means of cold air, by contact with a cooling bath, or by means of evaporation.
  • the cold air can be at rest or flow around the workpiece as air flow.
  • a cooling bath can be a solid or a liquid that is cooler in relation to the workpiece.
  • a holding or receiving device can serve as a cooling bath.
  • a gripper arm carrying the workpiece or a basket containing the workpiece may in turn be cooled to cool the workpiece.
  • a particularly effective method of cooling is given by evaporation.
  • a liquid is evaporated on the surface of the workpiece, wherein the workpiece is deprived of much heat. If the temperature of the workpiece is below the boiling temperature of the liquid, the evaporation can be forced by an air flow or a reduction of the air pressure.
  • the process steps mentioned are carried out in an inert gas atmosphere in a further development of the method.
  • This provision is needed for a long range of ionic liquids for long term quality maintenance, typically those ionic liquids that are highly hygroscopic.
  • liquid in film or droplet form ie with a relatively large surface area, is exposed to the atmosphere. If the relevant components of the liquid are to be recovered, protection by inert gas is of particular importance.
  • the coating liquid is mixed before and / or during the process steps a) - d).
  • This can be done by a mechanical stirrer, which is driven by a motor and a shaft.
  • magnetic stirrers are also advantageous, since they do not have an additional opening in a container wall for a mechanical Need coupling.
  • Particularly advantageous is a mixing by means of ultrasound, since this requires no additional parts within the respective container.
  • the respective means for mixing can be operated periodically or continuously. In addition to homogenizing the coating liquid, mixing also assists uniform tempering of the coating liquid.
  • various devices are known. It has been found that these devices are also suitable for coating with ionic liquids.
  • the workpiece during the coating with ionic liquid within a device according to the principle of a screw conveyor, a rotating drum or a G-drum (patent pending under the file reference DE 10 2007 018 887.2 ) emotional.
  • the described devices offer the advantage that even with small mass parts, such as screws, nuts, washers, rivets, etc., a complete coating can be ensured in a single coating operation. This is due to the fact that the workpieces are circulated, so there are no fixed contact points that would prevent an all-round action of the coating agent.
  • Particularly preferred are devices that operate on the principle of the screw conveyor. Such a device is z. B. from the DE 42 05 672 known.
  • the excess coating liquid removed from the workpiece is at least partially returned to the bath.
  • the recirculation can passively by backflow or active by pumping o. ⁇ . respectively. By this measure, the losses can be significantly reduced by discharging liquid with the workpiece, which brings a great cost savings, especially in many coating operations.
  • the workpiece is preferably before being introduced into the coating bath cleaned and / or dried.
  • various methods come into question. This can be done mechanically, for example by sandblasting, metal blasting, glass bead blasting or soda blasting of the workpiece.
  • chemical cleaning steps are of particular importance, for example etching, pickling or degreasing of the workpiece.
  • Suitable degreasing agents are, in addition to organic solvents, above all aqueous solutions, in particular alkaline solutions or those which are mixed with auxiliaries, such as surfactants.
  • the degreasing can be done by spraying with pressure or in a dip, in the latter case, the degreasing process is significantly improved by the use of ultrasound. Also by a higher temperature, such as in the hot alkaline degreasing, the efficiency can be increased.
  • the drying of the workpiece can be done by means of cold or hot air, by irradiation with infrared or microwaves and / or by means of negative pressure. According to a preferred embodiment of the invention, the drying of the cleaned workpieces can be used to heat or cool the workpiece.
  • the described measures for preparing the workpiece are of particular importance when working with ionic liquids, since they are often sensitive to contamination of any kind and in particular to introduced moisture.
  • the workpiece is electrolytically polished before the deposition process.
  • This is also referred to as an in-situ electrochemical etching.
  • ions are released from the surface of the workpiece by (usually brief) application of a corresponding voltage, ie the workpiece acts as an anode in this case.
  • This method is also suitable, for example, to dissolve oxide layers of steel that would interfere with the adhesion of a coating to be deposited.
  • This cleaning step can be carried out in the ionic liquid which is also used for coating, reversing the tension against the coating process. But it is also conceivable to provide a separate bath for this purpose. While the former variant is simpler in terms of apparatus and time, in the latter variant it can be avoided that the coating liquid is contaminated by substances detached from the workpiece.
  • rinsing liquid includes here in addition to liquids in which the ionic liquid is soluble, including those in which it is emulsifiable. The rinsing serves on the one hand to clean the workpiece. By rinsing the workpiece can also be prepared for any further coatings.
  • the workpiece be dried after rinsing. This can be done by again centrifuging, drying in a cold or warm air stream or other measures known from the prior art.
  • closed layers can be produced by the method according to the invention, e.g. ensure good corrosion protection, it may be desirable to set certain surface properties by means of an additional coating.
  • an additional coating protects the electrochemically applied coating against mechanical damage. Therefore, in a further development of the method after coating, a topcoat is applied. Corresponding topcoats are known from the prior art.
  • the process according to the invention ensures the usability of an ionic liquid in the course of an industrial coating process over long periods of time. Deterioration of the conductivity of the coating liquid due to temperature changes is inhibited.
  • the method thus enables the deposition of high-quality metal layers, in particular of aluminum a coating bath that remains usable for a long time. As a result, the coating is rarely refilled or replaced, resulting in significant cost savings. Furthermore, the disposal of unusable ionic liquid less frequently has to be ensured, which is both economically and ecologically advantageous.
  • the method according to the invention can be carried out by means of a device for coating a workpiece. Since the coating is carried out by deposition from a coating liquid comprising an ionic liquid containing ions of the at least one element, the device according to the prior art must comprise at least two electrodes (an electrode for contacting the workpiece and a counter electrode). In general, a coating container for receiving the coating liquid during the coating process is necessary. It may be advantageous to carry out the coating process with a so-called "three-electrode arrangement" in order to apply an exact potential to the workpiece.
  • such a device comprises means for temperature measurement, by means of which a deviation of the temperature of the workpiece from a predetermined setpoint temperature by 10 ° C, preferably by 5 ° C, can be determined, and means for heating and / or for cooling the workpiece.
  • the means for measuring temperature can work without contact (by measuring the infrared radiation) or by contacting the workpiece or the coating liquid (for example as a bimetallic thermometer or resistance thermometer).
  • Such temperature sensors are known from the prior art and usually work with a sufficiently high (usually much better) measurement accuracy to determine temperature differences of 5 ° C and 10 ° C.
  • such a device may optionally comprise further components, for example for centrifuging coating liquid from the workpiece or for mixing the coating liquid.
  • 20 kg steel screws are intended for coating with aluminum.
  • the target temperature for the coating process is 80 ° C.
  • the screws are prepared for coating by first sand blasted and then degreased at a degreasing in a basket in a cleaning solution consisting of water, in each of which 1 liter of water 9 g of potassium phosphate and 27 g of potassium hydroxide were dissolved, degreased at 85 ° C.
  • a thermostat connected to the bath ensures that its temperature is between 80 ° C and 90 ° C. After a contact time of 5 min, the basket is lifted out of the bath. The basket with the screws is rinsed with tap water, which has a temperature of about 80 ° C, and then thrown dry. Thereafter, the screws are further dried by means of a preheated to about 90 ° C air flow.
  • the first lock door After completion of the drying of the basket is introduced through a first lock door in a lock chamber, the first lock door is closed and evacuated to 0.05 bar parts. This will evaporate the last traces of moisture. Subsequently, the lock chamber is flooded with nitrogen. In the chamber walls induction coils are embedded, by means of which the screws may optionally be heated inductively. An infrared camera is used to check whether the temperature of the screws is within the specified range between 70 ° C and 90 ° C.
  • the lock chamber is connected via a second lock door with a coating chamber, which is filled with a nitrogen atmosphere.
  • the bottom of the coating chamber is formed as a trough in which a coating bath is located.
  • the coating bath consists of a melt of 1-ethyl-3-methyl-1H-imidazolium chloride (EMIC) in which aluminum chloride is dissolved.
  • EMIC 1-ethyl-3-methyl-1H-imidazolium chloride
  • the mass ratio EMIC: AlCl 3 is 1.7: 1.
  • a vertically movable coating drum with a perforated wall is arranged in the coating chamber.
  • the drum can be rotated by a motor around its longitudinal axis.
  • the drum itself is heated and is held by means of a thermostat in the intended temperature range.
  • the basket is introduced through the second lock door in the coating chamber, then the second lock door is closed.
  • the coating drum is outside the coating bath at this time. Through an opening, the screws are placed in the coating drum, then the drum is moved down into the coating.
  • Inside the drum is an aluminum electrode surrounded by the coating liquid, which is connected to the outside wall of the drum via a power supply.
  • the drum is slowly rotated at 20 rpm while applying a voltage of 20 V between the aluminum electrode and the outer wall of the drum so that the aluminum electrode acts as an anode.
  • the screws which are in contact with the wall of the drum are coated by deposition of aluminum from the coating liquid, while continuously removing aluminum ions by oxidation from the anode, so that the aluminum concentration in the coating liquid remains constant.
  • the basket is introduced through a third lock door in a nitrogen-filled rinsing chamber and the third lock door is closed.
  • a series of spray nozzles by means of which an aprotic rinse is sprayed onto the screws. This dissolves the last residues of the coating liquid, which are transported away together with the rinsing agent for separation and recycling in the coating bath.
  • the basket is again thrown off and driven through a fourth locker door from the rinsing chamber.
  • Example 1 20 kg steel screws are provided for coating with aluminum.
  • the target temperature for the coating process is set at 20 ° C this time.
  • the screws are in turn sandblasted and degreased analogously to Example 1. Since the degreasing process is much more efficient at higher temperatures, it is also carried out here at 85 ° C for 5 min.
  • the rinsing is now carried out with tap water, which has a temperature of about 20 ° C. Again, it is spun dry.
  • the screws are further dried by means of a pre-heated to about 40 ° C air flow.
  • the temperature of the air stream which is higher than the setpoint temperature, serves to compensate for heat losses due to the evaporation of liquid.
  • the basket is again introduced through a first lock door in a lock chamber, where evaporate by parts evacuation last moisture residues.
  • the lock chamber is filled with nitrogen, which has a temperature of 20 ° C has flooded.
  • induction coils are embedded, by means of which the screws may optionally be heated inductively.
  • An infrared camera is used to check whether the temperature of the screws is within the specified range between 10 ° C and 30 ° C.
  • the lock chamber is connected via a second lock door with a coating chamber, which is filled with a nitrogen atmosphere.
  • the structure of the coating chamber is similar to that in Example 1.
  • the bottom of the coating chamber is formed as a tub in which a coating bath is located.
  • This tub is made of a ceramic material, which is chemically particularly insensitive.
  • the coating bath consists of a melt of 1-ethyl-3-methylimidazolium chloride in which aluminum chloride is dissolved.
  • the molar molar ratio of 1-ethyl-3-methylimidazolium chloride: AlCl 3 is 2: 3.
  • Temperature sensors are used to continuously check whether the temperature of the wall of the coating chamber deviates from the setpoint temperature.
  • the coating chamber comprises a snake-like heat exchanger system which is arranged within the trough and runs through the coating liquid.
  • the arrangement to avoid damage is chosen so that contact between the drum and heat exchanger system is excluded. Through this heat exchanger system, cool water can be passed, while in the normal state water of 20 ° C is used.
  • the mentioned cooling systems are necessary because - even with careful tempering of the workpieces - by the deposition process, a heating of the workpiece and coating liquid can be done because electrical energy is converted into heat here.
  • a continuously operated magnetic stirrer which homogenizes on the one hand, the coating liquid, on the other hand ensures a uniform temperature and also supports the heat exchange between the liquid and the heat exchanger system by moving the coating liquid.
  • a coating drum with aluminum electrode according to Example 1 is used.
  • the drum is coated with a ceramic material, however, there is a series of electrodes on the inner wall for contacting the screws.
  • Example 1 The introduction of the workpieces and the process of the coating drum is carried out as in Example 1.
  • an in-situ electrochemical etching takes place.
  • a voltage of o, 8 V is applied between the electrodes in the wall of the drum and the aluminum electrode.
  • the drum is placed in slow rotation at 20 rpm, with the screws acting as an anode by contact with the electrodes in the drum wall. Last residues of oxides are thereby solved.
  • the etching is stopped and an opposite voltage of -0.2 V is applied, through which now the aluminum electrode acts as an anode, while the screws are coated by deposition of aluminum from the coating liquid.
  • the rotation of the drum is continued during the 10-minute coating process.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Claims (13)

  1. Procédé d'enduction pour une pièce à usiner avec les étapes de procédé suivantes :
    a) application d'un liquide d'enduction sur la pièce à usiner, le liquide d'enduction comprenant un liquide ionique qui contient des ions d'au moins un élément
    b) dépôt électrochimique d'une couche du au moins un élément du liquide d'enduction sur la pièce à usiner
    c) retrait de la pièce à usiner hors du liquide d'enduction
    d) retrait de liquide d'enduction excédentaire de la pièce à usiner, caractérisé en ce que
    la température de la pièce à usiner est réglée de telle sorte que la température du liquide d'enduction diverge pendant le procédé d'enduction de maximum 10 °C d'une température de consigne prédéterminée.
  2. Procédé selon la revendication 1, caractérisé en ce que la température de la pièce à usiner est réglée de telle sorte que la température du liquide d'enduction diverge pendant le procédé d'enduction de maximum 5 °C de la température de consigne prédéterminée.
  3. Procédé selon la revendication 1, caractérisé en ce que la température de surface de la pièce à usiner est réglée de telle sorte qu'elle diverge pendant les étapes de procédé a) à d) de maximum 10 °C, de préférence de maximum 5 °C de la température de consigne prédéterminée.
  4. Procédé selon la revendication 1, caractérisé en ce qu'avant et/ou pendant les étapes de procédé a) à d), la pièce à usiner est chauffée au moyen d'air chaud, de rayonnement infrarouge, par irradiation de la surface, par contact avec un bain de chauffage ou de manière inductive et/ou refroidie au moyen d'air froid, par contact avec un bain de refroidissement, ou au moyen de vaporisation, au moins sur sa surface.
  5. Procédé selon les revendications 3 et 4, caractérisé en ce que,
    a) uniquement avant ou
    b) uniquement pendant ou
    c) avant et pendant
    au moins une des étapes a) à d), la pièce à usiner est chauffée et/ou refroidie, de sorte que sa température de surface diverge pendant les étapes de procédé a) à d) de maximum 10 °C, de préférence de maximum 5 °C, de la température de consigne prédéterminée.
  6. Procédé selon la revendication 1, caractérisé en ce qu'une couche d'un métal ou d'un alliage, comprenant de préférence au moins un des éléments aluminium, magnésium, zinc, nickel, chrome, tantale, titane, cuivre, argent ou or, ou une couche d'un semi-conducteur, comprenant de préférence au moins un des éléments silicium ou germanium, est déposée.
  7. Procédé selon la revendication 1, caractérisé en ce que les étapes de procédé citées sont exécutées dans une atmosphère de gaz inerte.
  8. Procédé selon la revendication 1, caractérisé en ce que le liquide d'enduction est mélangé avant et/ou pendant au moins une des étapes de procédé a) à d).
  9. Procédé selon la revendication 1, caractérisé en ce que la pièce à usiner est déplacée pendant l'enduction à l'intérieur d'un dispositif, le dispositif fonctionnant de préférence selon le principe d'un transporteur à vis, d'un tambour rotatif ou d'un tambour en G.
  10. Procédé selon la revendication 1, caractérisé en ce que le liquide d'enduction retiré de la pièce à usiner est reconduit au moins partiellement dans le bain.
  11. Procédé selon la revendication 1, caractérisé en ce que la pièce à usiner est nettoyée et/ou séchée et/ou polie de manière électrolytique avant l'étape de procédé a).
  12. Procédé selon la revendication 1, caractérisé en ce que la pièce à usiner est rincée après l'étape de procédé d), la pièce à usiner étant de préférence séchée après le rinçage et/ou des résidus rincés du liquide d'enduction étant récupérés et reconduits dans le bain.
  13. Procédé selon la revendication 1, caractérisé en ce qu'une couche de finition est appliquée après l'enduction.
EP09715063A 2008-02-26 2009-02-20 Procédé d'enduction pour une pièce à usiner Not-in-force EP2250301B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008011204 2008-02-26
PCT/EP2009/001243 WO2009106269A1 (fr) 2008-02-26 2009-02-20 Procédé d'enduction pour une pièce à usiner

Publications (2)

Publication Number Publication Date
EP2250301A1 EP2250301A1 (fr) 2010-11-17
EP2250301B1 true EP2250301B1 (fr) 2011-11-02

Family

ID=40723703

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09715063A Not-in-force EP2250301B1 (fr) 2008-02-26 2009-02-20 Procédé d'enduction pour une pièce à usiner

Country Status (4)

Country Link
US (1) US20110000793A1 (fr)
EP (1) EP2250301B1 (fr)
AT (1) ATE531835T1 (fr)
WO (1) WO2009106269A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2419544A1 (fr) * 2009-04-16 2012-02-22 Basf Se Élimination et recyclage de liquides ioniques contenant des sels métalliques, sur des pièces ayant subi un traitement de surface
JP5581523B2 (ja) 2009-10-19 2014-09-03 ディップソール株式会社 アルミニウムまたはアルミニウム合金バレル電気めっき方法
US20120189778A1 (en) * 2011-01-26 2012-07-26 Riewe Curtis H Coating method using ionic liquid
US8966893B2 (en) * 2012-03-05 2015-03-03 GM Global Technology Operations LLC Shape memory alloy actuators with sensible coatings
DK2859138T3 (en) * 2012-06-08 2017-02-27 Onderzoekscentrum Voor Aanwending Van Staal N V Process for making a metal coating
US20140178710A1 (en) * 2012-12-20 2014-06-26 United Technologies Corporation Alloying interlayer for electroplated aluminum on aluminum alloys
EP3088571B1 (fr) * 2015-04-28 2021-06-02 The Boeing Company Revêtements d'aluminium écologique sacrificiels pour des revêtements sacrificiels pour alliages d'acier à résistance élevée
CN110565134A (zh) * 2019-10-09 2019-12-13 深圳华络电子有限公司 一种电感器件的电极制备方法
US20230174436A1 (en) * 2019-10-18 2023-06-08 Ghislain Gonthier Process for drying anode coating

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL127936C (fr) * 1964-03-04
US3530371A (en) * 1968-07-01 1970-09-22 Varian Associates Internal field-frequency control for impulse gyromagnetic resonance spectrometers
US4624755A (en) * 1985-06-05 1986-11-25 Mcmanis Iii George E Preparation of ionic liquids for electrodeposition
US4624753A (en) * 1985-06-05 1986-11-25 Mcmanis Iii George E Method for electrodeposition of metals
US4882199A (en) * 1986-08-15 1989-11-21 Massachusetts Institute Of Technology Method of forming a metal coating on a substrate
JP2888001B2 (ja) * 1992-01-09 1999-05-10 日本電気株式会社 金属メッキ装置
DE4205672C2 (de) 1992-02-25 1995-04-20 Doerken Ewald Ag Vorrichtung zur elektrolytischen Beschichtung von Kleinteilen
JP2918832B2 (ja) * 1995-12-15 1999-07-12 日英ハードクローム工業株式会社 クロムめっきにおけるクロムめっき液、クロムめっき廃液、クロム酸洗浄水用クローズド・リサイクル・システム
TW562878B (en) * 2000-06-30 2003-11-21 Ebara Corp Copper-plating liquid, plating method and plating apparatus
US6881321B2 (en) * 2000-10-20 2005-04-19 The University Of Alabama Production, refining and recycling of lightweight and reactive metals in ionic liquids
KR20080110989A (ko) * 2006-02-15 2008-12-22 아크조 노벨 엔.브이. 이온성 액체를 사용하여 금속을 전착시키는 방법
EP1983078A1 (fr) * 2007-04-17 2008-10-22 Nederlandse Organisatie voor toegepast- natuurwetenschappelijk onderzoek TNO Électrodéposition
DE102007018887A1 (de) 2007-04-19 2008-10-23 Ewald Dörken Ag Trommel und Verfahren zum Beschichten von Werkstücken mit einer nicht-metallischen Beschichtung

Also Published As

Publication number Publication date
US20110000793A1 (en) 2011-01-06
EP2250301A1 (fr) 2010-11-17
ATE531835T1 (de) 2011-11-15
WO2009106269A1 (fr) 2009-09-03

Similar Documents

Publication Publication Date Title
EP2250301B1 (fr) Procédé d'enduction pour une pièce à usiner
DE3201475C2 (fr)
EP3411510B1 (fr) Installation de galvanisation à chaud et procédé de galvanisation à chaud
EP3445889B1 (fr) Procédé et flux pour la galvanisation à chaud
EP2061917B1 (fr) Installation d'enlevement de couche et procede pour son utilisation
WO2012119973A1 (fr) Produit d'acier plat, procédé de fabrication d'un produit d'acier plat et procédé de fabrication d'une pièce structurale
EP1285105B1 (fr) Couches formees par voie electrochimique et servant de protection anticorrosion ou de peinture primaire reactive
EP3400317B1 (fr) Installation de galvanisation à chaud et procédé de galvanisation à chaud pour la production en grande série
EP2391742A1 (fr) Procédé de revêtement de diffusion de zinc
EP3400318B1 (fr) Installation de galvanisation à chaud, procédé de galvanisation à chaud et leur utilisation
WO2021122106A1 (fr) Feuille de métal présentant une structure de surface déterministe et procédé de production d'un composant de métal en feuille formé et revêtu
WO2019158508A1 (fr) Procédé de phosphatation sélective d'une construction métallique composite
EP3230491B1 (fr) Réception de métaux légers dans un procédé de prétraitement et de décapage de l'acier
EP4110970B1 (fr) Procédé de fabrication de composants en acier durci doté d'une couche de protection contre la corrosion en alliage de zinc conditionnée
DE69700420T2 (de) Verfahren zur Bearbeitung der aus Kupfer oder Kupferlegierung hergestellten Aussenoberfläche einer Stranggusskokille welches aus einer Nickelplattierungstufe und einer Nickelentfernungstufe besteht
DE102009046732A1 (de) Verfahren zur Beschichtung einer metallischen Oberfläche eines Werkstücks
EP3031951B1 (fr) Traitement optimisé dans le pré-traitement du métal contre la corrosion à base de bains contenant du fluorure
DE19533748C2 (de) Aktivierungslösung zur Vorbehandlung von metallischen Werkstoffen für die galvanische Metallbeschichtung aus nicht wäßrigen Elektrolyten, Verwendung und Verfahren
EP0154384B1 (fr) Procédé de prétraitement de surfaces en zinc pour le laquage
DE19716493C2 (de) Verfahren zum elektrolytischen Beschichten von metallischen oder nichtmetallischen Endlosprodukten und Vorrichtung zur Durchführung des Verfahrens
DE2714298C2 (de) Verfahren und Vorrichtung zur Herstellung heißtauchverzinkter Bleche
EP4110972B1 (fr) Procédé de fabrication de composants en acier durci doté d'une couche de protection contre la corrosion en alliage de zinc conditionnée
WO2023174611A1 (fr) Couche de passivation pour substrats contenant un métal
EP0504704A1 (fr) Prétraitement pour matériaux métalliques pour la déposition de métaux par électrolyse
EP3882374A1 (fr) Procédé de génération de zones à différentes propriétés optiques sur des bandes en acier galvanisées et bandes en acier galvanisées pourvues de zones à différentes propriétés optiques

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

17P Request for examination filed

Effective date: 20100907

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA RS

17Q First examination report despatched

Effective date: 20110125

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

DAX Request for extension of the european patent (deleted)
GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502009001801

Country of ref document: DE

Effective date: 20111229

REG Reference to a national code

Ref country code: NL

Ref legal event code: VDEP

Effective date: 20111102

LTIE Lt: invalidation of european patent or patent extension

Effective date: 20111102

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120202

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111102

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120302

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111102

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111102

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111102

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111102

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111102

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120203

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120302

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111102

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20120228

Year of fee payment: 4

REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111102

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120202

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111102

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111102

Ref country code: IE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111102

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111102

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111102

BERE Be: lapsed

Owner name: EWALD DORKEN A.G.

Effective date: 20120228

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111102

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111102

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120229

26N No opposition filed

Effective date: 20120803

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20121031

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502009001801

Country of ref document: DE

Effective date: 20120803

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120228

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120229

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111102

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120213

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111102

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111102

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20130220

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130228

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130903

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130228

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 502009001801

Country of ref document: DE

Effective date: 20130903

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130220

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111102

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120220

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090220

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 531835

Country of ref document: AT

Kind code of ref document: T

Effective date: 20140220

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140220