EP1290243B1 - Method for coating a metallic component - Google Patents

Method for coating a metallic component Download PDF

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Publication number
EP1290243B1
EP1290243B1 EP01940517A EP01940517A EP1290243B1 EP 1290243 B1 EP1290243 B1 EP 1290243B1 EP 01940517 A EP01940517 A EP 01940517A EP 01940517 A EP01940517 A EP 01940517A EP 1290243 B1 EP1290243 B1 EP 1290243B1
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EP
European Patent Office
Prior art keywords
component
shaping
tool
release agent
process according
Prior art date
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Expired - Lifetime
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EP01940517A
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German (de)
French (fr)
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EP1290243A1 (en
Inventor
Andreas Barth
Marita Bauer
Wilfrid Polley
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Mercedes Benz Group AG
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DaimlerChrysler AG
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Publication of EP1290243A1 publication Critical patent/EP1290243A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D21/00—Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedure; Selection of compositions therefor
    • B22D21/002—Castings of light metals
    • B22D21/007—Castings of light metals with low melting point, e.g. Al 659 degrees C, Mg 650 degrees C
    • 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
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/73—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals characterised by the process
    • C23C22/74—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals characterised by the process for obtaining burned-in conversion coatings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/06—Lubricating, cooling or heating rolls
    • B21B27/10—Lubricating, cooling or heating rolls externally

Definitions

  • the invention relates to a method for coating a metallic component with a corrosion protection layer.
  • Fuel savings are especially in the automotive sector increasingly light metal components, eg. B. aluminum or Magnesium used.
  • the components are usually cast, forged, extruded or extruded
  • the metals mentioned and their alloys form one Passivation layer on the surface, taking it under normal climatic conditions protects well against corrosion. Under the influence of corrosion promoting media such as water and Salt, however, these metals are in unacceptable extent attacked corrosively.
  • DE 34 36 846 describes a method for die casting of Light metals, in which for better removal of the component a mold release agent is applied.
  • a mold release agent proposed that metal salts of based on aliphatic carboxylic acids and polyhydric alcohols.
  • the object of the invention is therefore, one opposite the prior art cheaper method for the To provide corrosion protection of light metal components.
  • Light metal components are usually metallic Mold tools using elevated temperatures produced.
  • the molds before the molding process with a mold release agent sprayed.
  • the mold release agent adheres to the surface of the Forming tool and supports the demolding of a molded Component, since the adhesion between the mold and the Component is reduced.
  • the shaping process Commonly used mold release agent is 98% to 99% of water containing between 1% and 2% of an organic Base material based on waxes.
  • the organic Base material of the mold release agent in a surface of the Component burns and significantly reduces corrosion. Under burning here is the emergence of a continuous surface layer during solidification understood the component. This is with the surface of the Component firmly connected and not washable. It has shown that depending on the nature of the basic material Mold release agent with a proportion of organic base material of more than 15% (hereinafter concentrated) Called mold release agent) already acts corrosion inhibiting. The corrosion-inhibiting properties increase with increasing concentration of the mold release agent organic raw material. The best corrosion protection is achieved by the undiluted raw material.
  • the process according to the invention can be used in all shaping processes be applied to light metals in which metallic permanent molds (which may be ceramic or hard metal layers or inserts may have) be used.
  • the molds must during the Forming a temperature of at least 80 ° C, preferably 150 ° C to 400 ° C have a burn-in on the component surface to ensure.
  • molding tools are for this z.
  • the temperature of the mold generally becomes during the molding process at a temperature kept between 150 ° C and 400 ° C. Will that be concentrated Mold release agent on the hot surface of the mold sprayed, so dry the organic materials at least partially on. This has a fixation of the base material to Result and leads to a uniform surface layer on the component surface.
  • the consideration of a Fixing time of up to 30 s is appropriate (claim 5).
  • Particularly suitable for coating by the inventive method are lightweight metal components Aluminum, magnesium, zinc or alloys of these metals (Claim 6).
  • Example 2 shows the use of the method according to the invention for coating a forged component.
  • a housing part for a car accessory from the magnesium alloy AS21 is a corresponding Continuous casting mold with a concentrated mold release agent, the 30% water and 70% organic matter based on glycerol ester, nationwide sprayed.
  • the coating of the component surface by the Mold release agent is continuously after quenching with connected to the surface and solidified, so this ensures permanent corrosion protection. That after the inventive method coated component, and an uncoated, otherwise identical component, was the so-called VDA (Verband Academicr Automobilindustrie) -change test subjected.
  • the VDA change test is taking off a defined series of corrosion tests according to DIN standards together.
  • the components are sprayed with salt for 24 h (according to DIN 50021 SS) and then at 90% relative Humidity a climate change test between 120 ° C and -40 ° C for 96 h (according to DIN 50017 KFW) exposed to and Conclusion under a defined climate at room temperature 48 h held.
  • the visual inspection of the components results in the following:
  • the uncoated component has a surface heavily encrusted with oxides. Fine surface structures are no longer recognizable.
  • the component coated in accordance with the invention remained virtually unchanged; minor surface defects can be recognized only on sharp edges, where the mold release agent was only able to burn into the surface to a lesser extent.
  • a mold release agent is sprayed 85% water and 15% wax Paraffins exists.
  • the mold release agent dries first on the forging tool, resulting in a local fixation of the mold release agent leads.
  • For optimal fixation is a waiting time of about 30 s inserted.
  • An aluminum semi-finished product made of the alloy AlMgSi1 is heated to approx. Preheated 370 ° C and in the forge to a Aluminum component formed in the form of a tension strut. While During the forming process a part of the wax constituent burns of the mold release agent into the surface of the aluminum component on. On the surface of the mold remains sufficient Wax back to ensure removal of the component.
  • Example 1 By coating the aluminum surface with According to the invention baked wax this is from corrosion protected.
  • the component is a corrosion test analogous to from Example 1 subjected. A comparison with one uncoated component of the same design shows the same Result as in Example 1.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)
  • Mold Materials And Core Materials (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Forging (AREA)

Description

Die Erfindung betrifft ein Verfahren zur Beschichtung eines metallischen Bauteils mit einer Korrosionsschutzschicht.The invention relates to a method for coating a metallic component with a corrosion protection layer.

Zur Realisierung von Leichtbaukonzepten mit dem Ziel der Kraftstoffeinsparung werden insbesondere im Automobilbereich zunehmend Leichtmetallbauteile, z. B. aus Aluminium oder Magnesium eingesetzt. Die Bauteile werden in der Regel gegossen, geschmiedet, stranggepresst oder extrudiertFor the realization of lightweight construction concepts with the goal of Fuel savings are especially in the automotive sector increasingly light metal components, eg. B. aluminum or Magnesium used. The components are usually cast, forged, extruded or extruded

Die genannten Metalle und ihre Legierungen bilden eine Passivierungsschicht an der Oberfläche aus, die sie unter normalen klimatischen Bedingungen gut gegen Korrosion schützt. Unter Einfluss von korrosionsfördernden Medien wie Wasser und Salz werden diese Metalle hingegen in nicht vertretbaren Maße korrosiv angegriffen.The metals mentioned and their alloys form one Passivation layer on the surface, taking it under normal climatic conditions protects well against corrosion. Under the influence of corrosion promoting media such as water and Salt, however, these metals are in unacceptable extent attacked corrosively.

Zahlreiche Maßnahmen zur Beschichtung von Leichtmetallen insbesondere von Magnesium wurden hiergegen entwickelt. Ein gebräuchliches Verfahren zur Herstellung eines Korrosionsschutzes auf Leichtmetallen besteht in der elektrolytischen Beschichtung, wie sie z. B. in der EP 33 048 B1 beschrieben wird. Der Nachteil dieses Verfahrens besteht hingegen in der aufwendigen und teueren nachträglichen Beschichtung der Bauteile.Numerous measures for the coating of light metals in particular of magnesium have been developed against it. On common method for producing a Corrosion protection on light metals exists in the electrolytic coating, as z. In EP 33 048 B1 is described. The disadvantage of this method is however, in the elaborate and expensive subsequent Coating of the components.

Die DE 34 36 846 beschreibt ein Verfahren zum Druckgießen von Leichtmetallen, bei dem zum besseren Entformen des Bauteils ein Formtrennmittel angewendet wird. Zur Vermeidung eines Anhaften des Formtrennmittels an dem erzeugten Bauteil wird ein Formtrennmittel vorgeschlagen, dass Metallsalzen von aliphatischen Karbonsäuren und mehrwertigen Alkoholen basiert.DE 34 36 846 describes a method for die casting of Light metals, in which for better removal of the component a mold release agent is applied. To avoid a Adherence of the mold release agent to the produced component is a mold release agent proposed that metal salts of based on aliphatic carboxylic acids and polyhydric alcohols.

Die Aufgabe der Erfindung besteht demnach darin, ein gegenüber des Standes der Technik kostengünstigeres Verfahren für den Korrosionsschutz von Leichtmetallbauteilen bereitzustellen. The object of the invention is therefore, one opposite the prior art cheaper method for the To provide corrosion protection of light metal components.

Die Lösung der Aufgabe besteht aus den Merkmalen des Patentanspruchs 1.The solution of the task consists of the characteristics of the Patent claim 1.

Leichtmetallbauteile werden in der Regel in metallischen Formwerkzeugen unter Anwendung erhöhter Temperaturen hergestellt. Bei diesen Verfahren werden die Formwerkzeuge vor dem Formgebungsprozess mit einem Formtrennmittel besprüht. Das Formtrennmittel haftet an der Oberfläche des Formwerkzeuges und unterstützt das Entformen eines geformten Bauteils, da die Haftung zwischen dem Formwerkzeug und dem Bauteil herabgesetzt wird. Das im Formgebungsprozess üblicherweise verwendete Formtrennmittel besteht zu 98 % bis 99 % aus Wasser, das zwischen 1 % und 2 % eines organischen Grundstoffs auf der Basis von Wachsen enthält.Light metal components are usually metallic Mold tools using elevated temperatures produced. In these methods, the molds before the molding process with a mold release agent sprayed. The mold release agent adheres to the surface of the Forming tool and supports the demolding of a molded Component, since the adhesion between the mold and the Component is reduced. The shaping process Commonly used mold release agent is 98% to 99% of water containing between 1% and 2% of an organic Base material based on waxes.

Erfindungsgemäß wurde bei der Verwendung von konzentrierten Formtrennmitteln festgestellt, dass sich der organische Grundstoff des Formtrennmittels in eine Oberfläche des Bauteils einbrennt und deutlich korrosionshemmend wirkt. Unter Einbrennen wird hierbei das Entstehen einer kontinuierlichen Oberflächenschicht während des Erstarrens des Bauteils verstanden. Diese ist mit der Oberfläche des Bauteils fest verbunden und nicht abwaschbar. Es hat sich gezeigt, dass je nach Art des Grundstoffes ein Formtrennmittel mit einem Anteil an organischem Grundstoff von mehr als 15 % (im Folgenden konzentriertes Formtrennmittel genannt) bereits korrosionshemmend wirkt. Die korrosionshemmenden Eigenschaften verstärken sich mit zunehmender Konzentration des Formtrennmittels an organischem Grundstoff. Der beste Korrosionsschutz wird durch den unverdünnten Grundstoff erzielt.According to the invention was concentrated in the use of Mold release agents found that the organic Base material of the mold release agent in a surface of the Component burns and significantly reduces corrosion. Under burning here is the emergence of a continuous surface layer during solidification understood the component. This is with the surface of the Component firmly connected and not washable. It has shown that depending on the nature of the basic material Mold release agent with a proportion of organic base material of more than 15% (hereinafter concentrated) Called mold release agent) already acts corrosion inhibiting. The corrosion-inhibiting properties increase with increasing concentration of the mold release agent organic raw material. The best corrosion protection is achieved by the undiluted raw material.

Zur Reduktion von Prozesskosten ist es möglich, dass das Formwerkzeug nur teilweise mit konzentriertem Formtrennmittel besprüht wird, wogegen die anderen Bereiche mit herkömmlichen, verdünnten Formtrennmittel behandelt werden. Dies führt natürlich lediglich zu einem partiellen Korrosionsschutz und kann dann angewendet werden, wenn nur bestimmte Bauteilbereiche korrosiven Medien ausgesetzt sind.To reduce process costs, it is possible that the Mold only partially with concentrated Mold release agent is sprayed, whereas the other areas treated with conventional, diluted mold release agents become. Of course, this only leads to a partial Corrosion protection and can be applied if only certain component areas are exposed to corrosive media.

Es handelt sich demnach bei dem erfindungsgemäßen Verfahren um eine in situ Beschichtung des Bauteils. Es wird zwar zur Herstellung des Bauteils eine geringfügig größere Menge an organischem Grundstoff für das Formtrennmittel benötigt, die Kosten für den Grundstoff sind jedoch vergleichsweise gering. Es muss in diesem Verfahren kein weiterer Beschichtungsprozess eingeführt werden und es werden keine weiteren Zusatzstoffe dem Prozess zugeführt.It is therefore in the process of the invention to an in situ coating of the component. It is indeed the Manufacture of the component to a slightly larger amount organic base material for the mold release agent, the Costs for the basic material are however comparatively low. There must be no other in this process Coating process will be introduced and there will be no other additives fed to the process.

Das erfindungsgemäße Verfahren kann bei allen Formgebungsverfahren für Leichtmetalle angewendet werden, bei denen metallische Dauerformwerkzeuge (die ggf. keramische oder hartmetallische Schichten oder Einsätze aufweisen können) eingesetzt werden. Die Formwerkzeuge müssen während des Formprozesses eine Temperatur von mindestens 80°C, bevorzugt 150°C bis 400°C aufweisen um ein Einbrennen auf der Bauteiloberfläche zu gewährleisten. Als Formwerkzeuge sind hierfür z. B. Dauergießformen, Presswerkzeuge, Schmiedewerkzeuge, Walzwerkzeuge, Zugwerkzeuge, Extrudierwerkzeuge oder Strangpresswerkzeuge geeignet. Besonders geeignet ist das erfindungsgemäße Verfahren bei Bauteilen, die durch Gießen in Dauergießformen oder durch Schmieden in Schmiedewerkzeugen dargestellt werden (Ansprüche 2 u. 3).The process according to the invention can be used in all shaping processes be applied to light metals in which metallic permanent molds (which may be ceramic or hard metal layers or inserts may have) be used. The molds must during the Forming a temperature of at least 80 ° C, preferably 150 ° C to 400 ° C have a burn-in on the component surface to ensure. As molding tools are for this z. Permanent casting dies, pressing tools, forging tools, Rolling tools, drawing tools, extrusion tools or Extrusion tools suitable. This is particularly suitable inventive method for components by casting in permanent casting molds or by forging in Forging tools are presented (claims 2 and 3).

Die besten Ergebnis bezüglich des Korrosionsschutzes werden erzielt, wenn der organische Grundstoff auf der Basis von Wachsen besteht. Hierzu gehören Paraffine und gesättigte Fettsäuren aus Glycerinester. Diese Grundstoffe brennen sich besonders gut in die Gießhaut des Bauteils ein, ohne dass eine Zersetzung stattfindet.The best results in terms of corrosion protection will be scored when the organic base is based on Growing exists. These include paraffins and saturated ones Fatty acids from glycerol ester. These raw materials are burning particularly good in the casting skin of the component, without that a decomposition takes place.

Durch eine Zersetzung der Grundstoffe würde der Korrosionsschutz beeinträchtigt werden. Zur Vermeidung einer Zersetzung des organischen Grundstoffes auf der Bauteiloberfläche ist es im Rahmen des erfindungsgemäßen Verfahrens zweckmäßig, das Bauteil direkt nach der Formgebung in Wasser abzuschrecken (Anspruch 4).By a decomposition of the basic materials of the Corrosion protection are impaired. To avoid one Decomposition of the organic material on the Component surface, it is within the scope of the invention Method expedient, the component directly after the Quenching shaping in water (claim 4).

Die Temperatur des Formwerkzeuges wird im Allgemeinen während des Formgebungsprozesses auf einer Temperatur zwischen 150° C und 400° C gehalten. Wird das konzentrierte Formtrennmittel auf die heiße Oberfläche des Formwerkzeuges gesprüht, so trocknen die organischen Grundstoffe zumindest teilweise an. Dies hat eine Fixierung des Grundstoffes zur Folge und führt zu einer gleichmäßigen Oberflächenschicht auf der Bauteiloberfläche. Die Berücksichtigung einer Fixierzeit von bis zu 30 s ist hierbei zweckmäßig (Anspruch 5).The temperature of the mold generally becomes during the molding process at a temperature kept between 150 ° C and 400 ° C. Will that be concentrated Mold release agent on the hot surface of the mold sprayed, so dry the organic materials at least partially on. This has a fixation of the base material to Result and leads to a uniform surface layer on the component surface. The consideration of a Fixing time of up to 30 s is appropriate (claim 5).

Besonders geeignet zur Beschichtung durch das erfindungsgemäße Verfahren sind Leichtmetallbauteilen aus Aluminium, Magnesium, Zink oder Legierungen dieser Metalle (Anspruch 6).Particularly suitable for coating by the inventive method are lightweight metal components Aluminum, magnesium, zinc or alloys of these metals (Claim 6).

Die einzige Figur zeigt den schematischen Ablauf des erfindungsgemäßen Verfahrens an Hand eines Gießprozesses, der im Beispiel 1 näher beschrieben ist. Beispiel 2 beschreibt die Anwendung des erfindungsgemäßen Verfahren zur Beschichtung eines geschmiedeten Bauteils.The single FIGURE shows the schematic sequence of the method according to the invention with reference to a casting process, which is described in detail in Example 1. Example 2 describes the use of the method according to the invention for coating a forged component.

Beispiel 1example 1

Zur Herstellung eines Gehäuseteils für ein Pkw-Nebenaggregat aus der Magnesiumlegierung AS21 wird eine entsprechende Dauergießform mit einem konzentrierten Formtrennmittel, das zu 30 % aus Wasser und 70 % aus einem organischen Grundstoff auf der Basis von Glycerinester besteht, flächendeckend aufgesprüht. For producing a housing part for a car accessory from the magnesium alloy AS21 is a corresponding Continuous casting mold with a concentrated mold release agent, the 30% water and 70% organic matter based on glycerol ester, nationwide sprayed.

Nach einer Wartezeit von ca. 15 s ist das Wasser des Formtrennmittels großenteils verdampft und der organische Grundstoff auf der Dauergießform, die auf ca. 250° C temperiert wird, fixiert. Anschließend wird die Dauergießform mit der geschmolzenen Magnesiumlegierung (Magnesiumschmelze), die eine Temperatur von 650° C aufweist, unter Druck befüllt. Das Formtrennmittel, das auf der Oberfläche der Dauergießform fixiert ist, verhindert während der Befüllung eine Benetzung der Oberfläche durch die Magnesiumschmelze. In dieser Prozessphase findet nahezu keine Wechselwirkung zwischen der Schmelze und dem Formtrennmittel statt.After a waiting period of about 15 s, the water of the Mold release agent largely evaporated and the organic Base material on the permanent casting mold, which is at approx. 250 ° C tempered, fixed. Subsequently, the Continuous casting mold with molten magnesium alloy (Molten magnesium), which has a temperature of 650 ° C has, filled under pressure. The mold release agent, the on the surface of the permanent mold is fixed prevented wetting the surface during filling the magnesium melt. In this process phase takes place almost no interaction between the melt and the Mold release agent instead.

Nach dem vollständigen Befüllen erstarrt die Magnesiumschmelze zu einem Bauteil. Der Erstarrungsvorgang dauert ca. 15 s. In dieser Zeit bildet sich auf der Oberfläche der Dauergießform eine Gießhaut aus, die nach dem Entformen die Oberfläche des Bauteils bildet. Während des Erstarrens lösen sich Teile des fixierten Trennmittels und brennen sich in die Gießhaut ein. Hierbei wird die chemische Struktur des Formtrennmittels nicht nachhaltig geschädigt. Zur Verhinderung einer Zersetzung des eingebrannten Formtrennmittels während einer längeren Abkühlphase wird das Bauteil in Wasser abgeschreckt.After complete filling the solidifies Magnesium melt to a component. The solidification process takes about 15 s. In this time forms on the Surface of the permanent mold of a casting skin, which after the Demoulding forms the surface of the component. During the Solidify parts of the fixed release agent and solve burn themselves into the casting skin. Here is the chemical Structure of mold release agent not sustainably damaged. To prevent decomposition of the baked Mold release agent during a prolonged cooling phase is the Quenched component in water.

Die Beschichtung der Bauteiloberfläche durch das Formtrennmittel ist nach dem Abschrecken kontinuierlich mit der Oberfläche verbunden und verfestigt, so dass dieses einen dauerhaften Korrosionsschutz gewährleistet. Das nach dem erfindungsgemäße Verfahren beschichtete Bauteil, sowie ein unbeschichtetes, ansonsten identisches Bauteil, wurde dem sogenannten VDA(Verband Deutscher Automobilindustrie)-Wechseltest unterzogen. Der VDA-Wechseltest setzt sich aus einer definierten Reihe von Korrosionstests nach DIN-Normen zusammen. Hierbei werden die Bauteile 24 h mit Salz besprüht (nach DIN 50021 SS) und anschließend bei 90 % relativer Luftfeuchtigkeit einem Klimawechseltest zwischen 120° C und -40° C für 96 h (nach DIN 50017 KFW) ausgesetzt und zum Abschluss unter einem definiertem Klima bei Raumtemperatur 48 h gehalten.The coating of the component surface by the Mold release agent is continuously after quenching with connected to the surface and solidified, so this ensures permanent corrosion protection. That after the inventive method coated component, and an uncoated, otherwise identical component, was the so-called VDA (Verband Deutscher Automobilindustrie) -change test subjected. The VDA change test is taking off a defined series of corrosion tests according to DIN standards together. Here, the components are sprayed with salt for 24 h (according to DIN 50021 SS) and then at 90% relative Humidity a climate change test between 120 ° C and -40 ° C for 96 h (according to DIN 50017 KFW) exposed to and Conclusion under a defined climate at room temperature 48 h held.

Die Sichtprüfung der Bauteile ergibt folgendes:
Das unbeschichtete Bauteil weist eine stark durch Oxide verkrustete Oberfläche auf. Feine Oberflächenstrukturen sind nicht mehr zu erkennen. Das erfindungsgemäß beschichtete Bauteil hingegen blieb nahezu unverändert, geringfügige Oberflächendefekte sind lediglich an scharfen Kanten zu erkennen, dort wo das Formtrennmittel nur in geringerem Ausmaß in die Oberfläche einbrennen konnte.The visual inspection of the components results in the following:
The uncoated component has a surface heavily encrusted with oxides. Fine surface structures are no longer recognizable. By contrast, the component coated in accordance with the invention remained virtually unchanged; minor surface defects can be recognized only on sharp edges, where the mold release agent was only able to burn into the surface to a lesser extent.

Beispiel 2Example 2

Auf ein Schmiedewerkzeug, dass eine Oberflächentemperatur von 200°C aufweist, wird ein Formtrennmittel gesprüht, dass zu 85 % aus Wasser und zu 15 % aus Wachsen auf der Basis von Paraffinen besteht. Das Formtrennmittel trocknet zunächst auf dem Schmiedewerkzeug ein, was zu einer lokalen Fixierung des Formtrennmittels führt. Zur optimalen Fixierung wird eine Wartezeit von ca. 30 s eingelegt.On a blacksmith tool that has a surface temperature of 200 ° C, a mold release agent is sprayed 85% water and 15% wax Paraffins exists. The mold release agent dries first on the forging tool, resulting in a local fixation of the mold release agent leads. For optimal fixation is a waiting time of about 30 s inserted.

Ein Aluminiumhalbzeug aus der Legierung AlMgSi1 wird auf ca. 370°C vorgewärmt und in dem Schmiedewerkzeug zu einem Aluminiumbauteil in Form einer Zugstrebe umgeformt. Während des Umformprozesses brennt ein Teil des Wachsbestandteiles des Formtrennmittels in die Oberfläche des Aluminiumbauteils ein. Auf der Oberfläche des Formwerkzeuges bleibt genügend Wachs zurück um das Entformen des Bauteils zu gewährleisten.An aluminum semi-finished product made of the alloy AlMgSi1 is heated to approx. Preheated 370 ° C and in the forge to a Aluminum component formed in the form of a tension strut. While During the forming process a part of the wax constituent burns of the mold release agent into the surface of the aluminum component on. On the surface of the mold remains sufficient Wax back to ensure removal of the component.

Es folgt ein Lösungsglühen des Bauteils bei 550°C für 6 h an Luft. Durch diese Temperaturbehandlung erfolgte einer weiteres vertieftes Einbrennen des Wachses in die Oberfläche, wodurch die Wirkungsweise der Beschichtung noch verbessert werden konnte. Eine Zersetzung des Wachses konnte bei dieser Temperaturbehandlung nicht beobachtet werden. This is followed by a solution annealing of the component at 550 ° C for 6 h Air. By this temperature treatment was a further deepened burning of the wax in the Surface, whereby the mode of action of the coating still could be improved. A decomposition of the wax could can not be observed during this temperature treatment.

Durch die Beschichtung der Aluminiumoberfläche mit erfindungsgemäß eingebrannten Wachs ist diese vor Korrosion geschützt. Das Bauteil wird einem Korrosionstest analog dem aus Beispiel 1 unterzogen. Ein Vergleich mit einem unbeschichteten Bauteil der selben Bauart zeigt das selbe Ergebnis wie in Beispiel 1.By coating the aluminum surface with According to the invention baked wax this is from corrosion protected. The component is a corrosion test analogous to from Example 1 subjected. A comparison with one uncoated component of the same design shows the same Result as in Example 1.

Claims (6)

  1. Process for coating a light-alloy component with a corrosion-resistant layer,
    a metallic shaping tool being at least partially sprayed with concentrated mould release agent,
    the concentrated mould release agent having at least 15% of organic substances based on waxes,
    the component being shaped in the metallic shaping tool,
    the shaping tool being at a temperature between 150°C and 400°C during the shaping,
    the concentrated mould release agent being fired into a surface of the component during the shaping process of the component and
    which results in a continuous surface layer with a corrosion-inhibiting action being formed on the component.
  2. Process according to Claim 1, characterized in that the shaping tool used is a permanent casting mould, a forging tool, a press tool, a rolling tool, a drawing tool or an extrusion die.
  3. Process according to Claim 1 or 2, characterized in that the shaping tool is at a temperature of between 150°C and 250°C, during the shaping.
  4. Process according to one of Claims 1 to 3, characterized in that the light-metal component is quenched immediately after the shaping.
  5. Process according to one of Claims 1 to 4, characterized in that the shaping tool is heated before and during the shaping operation, and the mould release agent on the shaping tool is at least partially dried.
  6. Process according to one of Claims 1 to 5, characterized in that the component consists of aluminium, magnesium, zinc or alloys of these metals.
EP01940517A 2000-05-26 2001-05-22 Method for coating a metallic component Expired - Lifetime EP1290243B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10026338A DE10026338B4 (en) 2000-05-26 2000-05-26 Process for coating a metallic component
DE10026338 2000-05-26
PCT/EP2001/005871 WO2001092600A1 (en) 2000-05-26 2001-05-22 Method for coating a metallic component

Publications (2)

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EP1290243A1 EP1290243A1 (en) 2003-03-12
EP1290243B1 true EP1290243B1 (en) 2004-08-04

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US (1) US7025111B2 (en)
EP (1) EP1290243B1 (en)
DE (2) DE10026338B4 (en)
ES (1) ES2222378T3 (en)
MX (1) MXPA02011265A (en)
WO (1) WO2001092600A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009023616A1 (en) 2009-06-02 2010-12-09 Daimler Ag Method for coating a surface of a component, comprises applying an anti-adhesive agent on an area of the component not to be coated before coating, where the anti-adhesive agent comprises base material based on wax, graphite and/or silicon

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10338570B4 (en) * 2003-08-22 2005-07-14 Daimlerchrysler Ag Process for coating a metallic component
US7843465B1 (en) * 2007-05-31 2010-11-30 Zoran Corporation Method and apparatus for mapping a multi-dimensional signal from one space to another space

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3436846A1 (en) * 1983-12-23 1985-07-11 VEB Elektromotorenwerk Grünhain, DDR 9437 Grünhain Die-casting process for light metals and alloys thereof

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE35077C (en) R. HOHLFELD in Siegen Arrangement of standing water tube boilers
DD35077A (en) *
DE2006095C3 (en) * 1970-02-11 1979-05-10 Motoren- Und Turbinen-Union Muenchen Gmbh, 8000 Muenchen Use of a lacquer-like paint
US3963502A (en) * 1973-02-02 1976-06-15 P. R. Mallory & Co., Inc. Composition for application to die cavity surface
US3877141A (en) * 1973-06-01 1975-04-15 Standard Forge And Axle Compan Method for making brake shoes
DE3330494C1 (en) * 1983-08-24 1984-07-12 Buderus Ag, 6330 Wetzlar Process for the production of corrosion-resistant surfaces in contact with heating gas in heating boilers of cast iron
JPH0647163B2 (en) * 1986-01-27 1994-06-22 株式会社豊田中央研究所 Method for manufacturing composite aluminum member
DE3808609A1 (en) * 1988-03-15 1989-09-28 Electro Chem Eng Gmbh METHOD OF GENERATING CORROSION AND WEAR RESISTANT PROTECTION LAYERS ON MAGNESIUM AND MAGNESIUM ALLOYS
EP0380900A1 (en) * 1989-01-31 1990-08-08 Battelle Memorial Institute A method and a device for homogenizing the intimate structure of metals and alloys cast under pressure
US5076339B1 (en) * 1990-02-08 1998-06-09 J & S Chemical Corp Solid lubricant for die-casting process
US5279750A (en) * 1991-03-06 1994-01-18 Hanano Commercial Co., Ltd. Method for squeeze casting powdery mold releasing agent
JPH0890147A (en) * 1994-09-22 1996-04-09 Sumitomo Durez Co Ltd Resin coated sand for shell mold
FR2729876B1 (en) * 1995-01-26 1997-04-18 Fonderie Ctr Tech Ind METHOD AND APPARATUS FOR CONTROLLING POETING MEANS IN A MOLDING PLANT
US5662156A (en) * 1995-12-05 1997-09-02 Freeman; Lewis Gene Method of die casting machine lubrication with unitized lubricant
JP2849808B2 (en) * 1996-04-12 1999-01-27 株式会社ケーヒン Method of applying powder release agent to die casting mold and die casting apparatus
CA2206487A1 (en) * 1996-05-31 1997-11-30 Fritz Grensing Composite cores and metal casting therewith
DE19810032A1 (en) * 1998-03-09 1999-09-16 Acheson Ind Inc Method and device for preparing the mold walls of a mold for primary shaping or shaping for the next molding cycle, spray element with centrifugal atomization and air guidance and use of such a spray element for spraying essentially solvent-free mold wall treatment agents

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3436846A1 (en) * 1983-12-23 1985-07-11 VEB Elektromotorenwerk Grünhain, DDR 9437 Grünhain Die-casting process for light metals and alloys thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009023616A1 (en) 2009-06-02 2010-12-09 Daimler Ag Method for coating a surface of a component, comprises applying an anti-adhesive agent on an area of the component not to be coated before coating, where the anti-adhesive agent comprises base material based on wax, graphite and/or silicon

Also Published As

Publication number Publication date
DE50103132D1 (en) 2004-09-09
DE10026338A1 (en) 2001-12-06
US7025111B2 (en) 2006-04-11
US20040040686A1 (en) 2004-03-04
EP1290243A1 (en) 2003-03-12
ES2222378T3 (en) 2005-02-01
DE10026338B4 (en) 2004-06-09
WO2001092600A1 (en) 2001-12-06
MXPA02011265A (en) 2003-04-25

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