EP0046912A1 - Cyanide gold-baths and process for the galvanic deposition of gold-dispersion coatings that contain solid lubricant, and its application - Google Patents

Cyanide gold-baths and process for the galvanic deposition of gold-dispersion coatings that contain solid lubricant, and its application Download PDF

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Publication number
EP0046912A1
EP0046912A1 EP81106338A EP81106338A EP0046912A1 EP 0046912 A1 EP0046912 A1 EP 0046912A1 EP 81106338 A EP81106338 A EP 81106338A EP 81106338 A EP81106338 A EP 81106338A EP 0046912 A1 EP0046912 A1 EP 0046912A1
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Prior art keywords
gold
baths
solid lubricant
contain
cyanide
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EP81106338A
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German (de)
French (fr)
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EP0046912B1 (en
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Georg Behringer
Hans Dr. Laub
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Siemens AG
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Siemens AG
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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
    • C25D15/00—Electrolytic or electrophoretic production of coatings containing embedded materials, e.g. particles, whiskers, wires
    • C25D15/02—Combined electrolytic and electrophoretic processes with charged materials
    • 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
    • C25D3/48—Electroplating: Baths therefor from solutions of gold
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
    • H01H11/04—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts
    • H01H11/041—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts by bonding of a contact marking face to a contact body portion
    • H01H2011/046—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts by bonding of a contact marking face to a contact body portion by plating

Definitions

  • the invention relates to cyanide, alkaline and acidic gold baths containing gloss additives for the electrodeposition of gold-containing coatings containing solid lubricants.
  • Mechanically stressed contact parts e.g. Plugs or relays are often gold-plated to meet the requirements placed on them in terms of corrosion resistance and wear resistance.
  • Galvanic gold baths or alkaline gold baths consisting of potassium gold cyanide (K [Au (CN) 2 ], potassium cyanide (KCN), disodium phosphate (Na 2 HP0 4 ) with the addition of potassium silver cyanide, K [Ag (CN) 2 ] as a brightener or acid gold
  • Cobalt baths consisting, for example, of potassium gold cyanide, cobalt sulfate (CoSO 4 .7H 2 O), potassium citrate and citric acid, the cobalt salt acting as an additive to the gloss, are known or their alkali salts such as tartaric acid, acetic acid or malonic acid are used as buffer or conductive salts.
  • gold layers deposited from such baths and also so-called hard gold coatings are not yet sufficiently wear-resistant for contact parts. Applying gold in higher layer thicknesses is usually ruled out for reasons of cost. On the other hand, gold plating is essential for some technical purposes, for example for con beat the Td 2 Dm / 26.8.1980
  • the object of the invention is to use conventional gold baths to achieve coatings with increased wear resistance (improved abrasion behavior) and high corrosion resistance by electroplating.
  • the layers should be used for mechanically stressed contact parts e.g. can also be used on connectors and relays with low current.
  • alkaline or acidic brightener additives which according to the invention contain 10-200 g / l of a fine-grained solid lubricant and 1-30 g / l, preferably 5-15 g / l, of at least one isoalkyl sulfate which is soluble in acidic and alkaline aqueous gold baths .
  • An addition of 50-150 g / l of fine-grained solid lubricant has proven to be particularly favorable.
  • Solid lubricant-containing coatings obtained are uniform, bright, smooth and non-porous. With contacts, the wear is greatly reduced compared to conventional contacts and thus their service life and quality are improved while gold is saved significantly.
  • the solid lubricant for example graphite
  • the graphite content of the coatings can be 0.1-5% by weight.
  • Such gold-graphite dispersion coatings showed a significantly increased wear resistance with a greatly reduced tendency to stick compared to pure gold layers.
  • the excellent wear resistance of gold plating when using graphite as a solid lubricant is evident from wear tests.
  • the coefficient of friction *) of gold / graphite layers for various friction partners is usually ⁇ 0.25, compared to 1.5% for pure gold, however, in some cases even higher. So it is at least 6 times. Continuous switching tests on relays that were equipped with gold or gold / graphite contacts showed that the tendency of gold layers to stick can be greatly reduced by incorporating graphite.
  • Suitable solid lubricants are e.g. Sulfides and selenides from molybdenum, tungsten, niobium and tantalum.
  • the grain size is ⁇ 0.1-5 ⁇ m.
  • the coefficient of friction ⁇ in friction tests is the ratio of the pull-off force F R and normal force F N (load) .
  • Particularly suitable isoalkyl sulfates correspond to the general formula wherein R 1 is a saturated aliphatic hydrocarbon radical (general formula C n H 2n ) with 3-20 C atoms, preferably 5-12 C atoms and R 2 is a saturated aliphatic hydrocarbon radical (general formula C n H 2n + 1 ) with 1- Can be 10 carbon atoms, preferably 1-4 carbon atoms. Me means an alkali metal, preferably sodium.
  • Suitable isoalkyl sulfates are, for example
  • alkaline or acidic gold baths containing conventional gloss agents are used with 10-200 g / l, preferably 50-150 g / l, of a fine-grained solid lubricant and 1-30 g / l, preferably 5- 15 g / l, at least one isoalkyl sulfate which is soluble in acidic and alkaline, aqueous gold baths, and is operated at a temperature of 20-70 ° C. and a current density of 0.2-40 A / dm 2 with vigorous bath movement.
  • the solid-lubricant-containing gold dispersion coatings obtained from a bath according to the invention can, after appropriate pretreatment, be deposited as a rule over nickel layers on any base metals.
  • Preferred base metals are copper and copper alloys.
  • Gold coatings according to the invention find much contact layers use. They can be used, for example, for relay contacts on plug connectors, slip ring contacts.
  • Metal objects e.g. electrical contacts whose. Surface to be subjected to wear, were coated with a gold / graphite dispersion coating i after a pretreatment customary in electroplating and the application of a nickel intermediate layer in an electrolyte of the following composition.
  • Objects made of metal, for example electrical contacts, the surface of which is to be subjected to wear, have been used in electroplating usual pretreatment and the application of a nickel intermediate layer in an electrolyte of the following composition coated with a gold / molybdenum sulfide dispersion coating.

Abstract

1. Cyanide alkaline and acid gold baths containing brightening additions, for the electrodeposition of gold dispersion coatings which contain solid lubricants, characterised in that they contain 10-200 g/l of a solid lubricant of a particle size =< 0.1-5 mu m and 1-30 g/l of at least one isoalkyl sulphate which is soluble in acid and alkaline aqueous gold baths.

Description

Die Erfindung betrifft cyanidische, Glanzzusätze enthaltende, alkalische und saure Goldbäder zur galvanischen Abscheidung von Feststoffschmiermittel enthaltenden Gold-Dispersionsüberzügen.The invention relates to cyanide, alkaline and acidic gold baths containing gloss additives for the electrodeposition of gold-containing coatings containing solid lubricants.

Mechanisch beanspruchte Kontaktteile, z.B. an Steckverbindern oder Relais werden vielfach vergoldet, um die an sie gestellten Anforderungen hinsichtlich Korrosionsbeständigkeit und Verschleißfestigkeit zu erfüllen.Mechanically stressed contact parts, e.g. Plugs or relays are often gold-plated to meet the requirements placed on them in terms of corrosion resistance and wear resistance.

Galvanische Goldbäder bzw. alkalische Goldbäder bestehend aus Kaliumgoldcyanid (K [Au(CN)2], Kaliumcyanid (KCN), Dinatriumphosphat (Na2HP04) unter Zusatz von Kaliumsilbercyanid, K[Ag(CN)2] als Glanzzusatz oder saure Gold-Kobaltbäder, bestehend beispielsweise aus Kaliumgoldcyanid, Kobaltsulfat (CoSO4.7H2O), Kaliumcitrat und Citronensäure, wobei das Kobaltsalz als Glanzzusatz wirkt, sind bekannt. Bei sauren Goldbädern können an Stelle von Citronensäure auch andere organische Säuren, und zwar aliphatische Carbonsäuren oder Oxycarbonsäuren bzw. deren Alkalisalze wie Weinsäure, Essigsäure oder Malonsäure als Puffer- bzw. Leitsalze verwendet werden. Aus solchen Bädern abgeschiedene Goldschichten und auch sogenannte Hartgoldüberzüge sind aber für Kontaktteile noch nicht hinreichend verschleißbeständig. Ein Auftragen von Gold in höheren Schichtdicken scheidet meist aus Kostengründen aus. Andererseits sind Goldüberzüge für manche technische Zwecke unerläßlich, beispielsweise für Kontakte der Td 2 Dm / 26.8.1980Galvanic gold baths or alkaline gold baths consisting of potassium gold cyanide (K [Au (CN) 2 ], potassium cyanide (KCN), disodium phosphate (Na 2 HP0 4 ) with the addition of potassium silver cyanide, K [Ag (CN) 2 ] as a brightener or acid gold Cobalt baths consisting, for example, of potassium gold cyanide, cobalt sulfate (CoSO 4 .7H 2 O), potassium citrate and citric acid, the cobalt salt acting as an additive to the gloss, are known or their alkali salts such as tartaric acid, acetic acid or malonic acid are used as buffer or conductive salts. However, gold layers deposited from such baths and also so-called hard gold coatings are not yet sufficiently wear-resistant for contact parts. Applying gold in higher layer thicknesses is usually ruled out for reasons of cost. On the other hand, gold plating is essential for some technical purposes, for example for con beat the Td 2 Dm / 26.8.1980

Schwachstromtechnik. Man hat so versucht, die Verschleißbeständigkeit von Goldüberzügen durch MitaDscheidung von anderen Metallen, beispielsweise Kobalt oder Nickel (Legierungsüberzüge) zu verbessern.Low power technology. Attempts have been made to improve the wear resistance of gold coatings by co-separating them from other metals, for example cobalt or nickel (alloy coatings).

Es ist bekannt, daß der Verschleiß von mechanisch, z.B. durch Reibung beänspruchten Oberflächenschichten durch Graphit herabgesetzt werden kann. Aus einem von Löffler, D., in Galvanotechnik (65) 1974, Nr. 5, S.360, veröffentlichten Aufsatz sind graphithaltige Nickel- und Eisenüberzüge bekannt. Diese Nickel- bzw. Eisendispersionsüberzüge sind galvanisch erzeugte -Metallüberzüge, die eine nichtmetallische Phase infeiner, möglichst gleichmäßiger Verteilung, hier Graphit, enthalten und aus sauren Bädern abgeschieden werden. Auch für galvanisch abgeschiedene Silberschichten ist bekannt, daß durch Graphiteinlagerung die Abriebbeständigkeit erhöht werden kann.(DE-PS 25 43 082).It is known that mechanical, e.g. surface layers stressed by friction can be reduced by graphite. Graphite-containing nickel and iron coatings are known from an article published by Löffler, D. in Galvanotechnik (65) 1974, No. 5, p.360. These nickel or iron dispersion coatings are electroplated metal coatings which contain a non-metallic phase of a fine, as uniform as possible distribution, here graphite, and are deposited from acidic baths. It is also known for galvanically deposited silver layers that the abrasion resistance can be increased by incorporating graphite (DE-PS 25 43 082).

Aufgabe der Erfindung ist es, unter Verwendung von konventionellen Goldbädern Überzüge mit erhöhter Verschleißbeständigkeit (verbessertem Abriebverhalten) und hoher Korrosionsbeständigkeit auf galvanischem Wege zu erreichen. Die Schichten sollen für mechanisch stark beanspruchte Kontaktteile z.B. an Steckverbindern und Relais auch bei Schwachstrom einsetzbar sein.The object of the invention is to use conventional gold baths to achieve coatings with increased wear resistance (improved abrasion behavior) and high corrosion resistance by electroplating. The layers should be used for mechanically stressed contact parts e.g. can also be used on connectors and relays with low current.

Diese Aufgabe wird gelöst mit alkalischen oder sauren Glanzzusätze enthaltenden Goldbädern, die erfindungsgemäß 10-200 g/l eines feinkörnigen Feststoffschmiermittels und 1-30 g/l, vorzugsweise 5-15 g/l, mindestens eines in sauren und alkalischen wäßrigen Goldbädern löslichen Isoalkylsulfats enthalten. Ein Zusatz' von 50-150 g/1 an feinkörnigem Feststoffschmiermittel hat sich als besonders günstig erwiesen.This object is achieved with gold baths containing alkaline or acidic brightener additives, which according to the invention contain 10-200 g / l of a fine-grained solid lubricant and 1-30 g / l, preferably 5-15 g / l, of at least one isoalkyl sulfate which is soluble in acidic and alkaline aqueous gold baths . An addition of 50-150 g / l of fine-grained solid lubricant has proven to be particularly favorable.

Aus erfindungsgemäßen Goldbädern auf galvanischem Wege erhaltene Feststoffschmiermittel-haltige Überzüge sind gleichmäßig, blank, glatt und porenfrei. Bei Kontakten ist der Verschleiß gegenüber herkömmlichen Kontakten stark herabgesetzt und damit ihre Lebensdauer und Qualität verbessert bei wesentlicher Goldeinsparung. Das Feststoffschmiermittel, beispielsweise Graphit, liegt im Gold-Graphit-Dispersionsüberzug in außerordentlich feiner und gleichmäßiger Verteilung vor. Der Graphitgehalt der Überzüge kann je nach Verwendungszweck 0,1-5 Gew.% betragen. Solche Gold-Graphit-Dispersionsüberzüge zeigten gegenüber reinen Goldschichten eine wesentlich erhöhte -Verschleißbeständigkeit bei stark verminderter Klebneigung.From gold baths according to the invention by galvanic means Solid lubricant-containing coatings obtained are uniform, bright, smooth and non-porous. With contacts, the wear is greatly reduced compared to conventional contacts and thus their service life and quality are improved while gold is saved significantly. The solid lubricant, for example graphite, is present in the gold-graphite dispersion coating in an extremely fine and uniform distribution. Depending on the intended use, the graphite content of the coatings can be 0.1-5% by weight. Such gold-graphite dispersion coatings showed a significantly increased wear resistance with a greatly reduced tendency to stick compared to pure gold layers.

Die hervorragende Verschleißbeständigkeit von Goldüberzügen bei Verwendung von Graphit als Feststoffschmiermittel geht aus Verschleißversuchen hervor. Die Reibungszahl *) von Gold/Graphitschichten für verschiedene Reibpartner beträgt in der Regel ≦ 0,25,im Vergleich dazu liegt sie bei Reingold jedoch um 1,5, zum Teil sogar darüber. Sie beträgt also mindestens das 6fache. Dauerschaltversuche an Relais, die mit Gold bzw. Gold/Graphitkontakten ausgerüstet waren, ergaben, daß die Klebneigung von Goldschichten durch Graphiteinbau sehr stark vermindert werden kann.The excellent wear resistance of gold plating when using graphite as a solid lubricant is evident from wear tests. The coefficient of friction *) of gold / graphite layers for various friction partners is usually ≦ 0.25, compared to 1.5% for pure gold, however, in some cases even higher. So it is at least 6 times. Continuous switching tests on relays that were equipped with gold or gold / graphite contacts showed that the tendency of gold layers to stick can be greatly reduced by incorporating graphite.

Geeignete Feststoffschmiermittel sind z.B. Sulfide und Selenide von Molybdän, Wolfram, Niob und Tantal. Die Korngröße ist ≦ 0,1-5 µm.Suitable solid lubricants are e.g. Sulfides and selenides from molybdenum, tungsten, niobium and tantalum. The grain size is ≦ 0.1-5 µm.

*) Unter Reibungszahl µ versteht man bei Reibversuchen (hin- und hergehende Relativbewegung einer zu prüfenden Oberfläche, z.B. Gold/Graphit, und eines Reibpartners, z.B. eines Kontaktniets aus Silber/Palladium) das Verhältnis von Abzugskraft FR und Normalkraft FN (Belastung).* ) The coefficient of friction µ in friction tests (reciprocating relative movement of a surface to be tested, e.g. gold / graphite, and a friction partner, e.g. a contact rivet made of silver / palladium) is the ratio of the pull-off force F R and normal force F N (load) .

Besonders geeignete Isoalkylsulfate entsprechen der allgemeinen Formel

Figure imgb0001
worin R1 ein gesättigter aliphatischer Kohlenwasserstoffrest (allgemeine Formel CnH2n) mit 3-20 C-Atomen, vorzugsweise 5-12 C-Atomen und R2 ein gesättigter aliphatischer Kohlenwasserstoffrest (allgemeine Formel CnH2n+1) mit 1-10 C-Atomen, vorzugsweise 1-4- C-Atomen sein kann. Me bedeutet ein Alkalimetall, vorzugsweise Natrium.Particularly suitable isoalkyl sulfates correspond to the general formula
Figure imgb0001
 wherein R 1 is a saturated aliphatic hydrocarbon radical (general formula C n H 2n ) with 3-20 C atoms, preferably 5-12 C atoms and R 2 is a saturated aliphatic hydrocarbon radical (general formula C n H 2n + 1 ) with 1- Can be 10 carbon atoms, preferably 1-4 carbon atoms. Me means an alkali metal, preferably sodium.

Geeignete Isoalkylsulfate sind z.B.

Figure imgb0002
Suitable isoalkyl sulfates are, for example
Figure imgb0002

Zur Herstellung von Feststoffschmiermittel-haltigen Gold-Dispersionsüberzügen gemäß der Erfindung werden konventionelle Glanzmittel enthaltende alkalische oder saure Goldbäder mit 10-200 g/l, vorzugsweise 50-150 g/l, eines feinkörnigen Feststoffschmiermittels und 1-30 g/l, vorzugsweise 5-15 g/l, mindestens eines in sauren und alkalischen,wäßrigen Goldbädern löslichen Isoalkylsulfats versetzt und bei einer Temperatur von 20-70°C und einer Stromdichte von 0,2-40 A/dm2 unter starker Badbewegung betrieben. Die aus einem Bad gemäß der Erfindung erhaltenen Feststoffschmiermittel-haltigen Gold-Dispersionsüberzüge können nach entsprechender Vorbehandlung in der Regel über Nickelschichten auf beliebigen Grundmetallen abgeschieden werden. Bevorzugte Grundmetalle sind Kupfer und Kupferlegierungen.For the production of solid lubricant-containing gold dispersion coatings according to the invention, alkaline or acidic gold baths containing conventional gloss agents are used with 10-200 g / l, preferably 50-150 g / l, of a fine-grained solid lubricant and 1-30 g / l, preferably 5- 15 g / l, at least one isoalkyl sulfate which is soluble in acidic and alkaline, aqueous gold baths, and is operated at a temperature of 20-70 ° C. and a current density of 0.2-40 A / dm 2 with vigorous bath movement. The solid-lubricant-containing gold dispersion coatings obtained from a bath according to the invention can, after appropriate pretreatment, be deposited as a rule over nickel layers on any base metals. Preferred base metals are copper and copper alloys.

Goldüberzüge gemäß der Erfindung finden viel als Kontaktschichten Verwendung. Sie können z.B. für Relaiskontakte an Steckverbindern, Schleifringkontakten eingesetzt werden.Gold coatings according to the invention find much contact layers use. They can be used, for example, for relay contacts on plug connectors, slip ring contacts.

Die Erfindung wird durch die folgenden Beispiele näher erläutert.The invention is illustrated by the following examples.

Beispiel 1example 1

Gegenstände aus Metall, z.B. elektrische Kontakte, deren Oberfläche einer Verschleißbeanspruchung unterworfen werden soll, wurden nach einer in der Galvanotechnik üblichen Vorbehandlung und dem Aufbringen- einer Nickelzwischenschicht in einem Elektrolyten folgender Zusammensetzung mit einem Gold/Graphit-Dispersionsüberzug beschichtet.

Figure imgb0003
Objects made of metal, for example electrical contacts, the surface of which is to be subjected to wear, were coated with a gold / graphite dispersion coating after a pretreatment customary in electroplating and the application of an intermediate nickel layer in an electrolyte of the following composition.
Figure imgb0003

Beispiel 2Example 2

Gegenstände aus Metall, z.B. elektrische Kontakte, deren . Oberfläche einer Verschleißbeanspruchung unterworfen werden soll, wurden nach einer in der Galvanotechnik üblichen Vorbehandlung und dem Aufbringen einer Nickelzwischenschicht in einem Elektrolyten folgender Zusammensetzung mit einem Gold/Graphit-Dispersionsüberzug i beschichtet.Metal objects, e.g. electrical contacts whose. Surface to be subjected to wear, were coated with a gold / graphite dispersion coating i after a pretreatment customary in electroplating and the application of a nickel intermediate layer in an electrolyte of the following composition.

Figure imgb0004
Figure imgb0004

Beispiel 3Example 3

Gegenstände aus Metall, z.B. elektrische Kontakte, deren Oberfläche einer Verschleißbeanspruchung unterworfen werden sollen, wurden nach einer in der Galvanotechnik üblichen Vorbehandlung und dem Aufbringen einer Nickelzwischenschicht in einem Elektrolyten folgender Zusammensetzung mit einem Gold/Graphit-Dispersionsüberzug beschichtet.

Figure imgb0005
Objects made of metal, for example electrical contacts, the surface of which are to be subjected to wear, were coated with a gold / graphite dispersion coating after a pretreatment customary in electroplating and the application of an intermediate nickel layer in an electrolyte of the following composition.
Figure imgb0005

Beispiel 4Example 4

Gegenstände aus Metall, z.B. elektrische Kontakte, deren i Oberfläche einer Verschleißbeanspruchung unterworfen werden soll, wurden nach einer in der Galvanotechnik üblichen Vorbehandlung und dem Aufbringen einer Nickelzwischenschicht in einem Elektrolyten folgender Zusammensetzung mit einem Gold/Molybdänsulfid-Dispersionsüberzug beschichtet.

Figure imgb0006
Objects made of metal, for example electrical contacts, the surface of which is to be subjected to wear, have been used in electroplating usual pretreatment and the application of a nickel intermediate layer in an electrolyte of the following composition coated with a gold / molybdenum sulfide dispersion coating.
Figure imgb0006

Claims (8)

1. Cyanidische Glanzzusätze enthaltende, alkalische und saure Goldbäder zur galvanischen Abscheidung von Feststoffschmiermittel-haltigen Gold-Dispersionsüberzügen, dadurch gekennzeichnet , daß sie 10-200 g/l eines feinkörnigen Feststoffschmiermittels und 1-30 g/l mindenstens eines in sauren und alkalischen, wäßrigen Goldbädern löslichen Isoalkylsulfats enthalten.1. Containing cyanide gloss additives, alkaline and acidic gold baths for the electrodeposition of solid lubricant-containing gold dispersion coatings, characterized in that they contain 10-200 g / l of a fine-grained solid lubricant and 1-30 g / l of at least one in acidic and alkaline, aqueous Gold baths contain soluble isoalkyl sulfate. 2. Cyanidisehe Goldbäder nach Anspruch 1, dadurch gekennzeichnet , daß die Feststoffschmiermittel eine Teilchengröße von ≦ 0,1-5 µm haben.2. cyanide gold baths according to claim 1, characterized in that the solid lubricants have a particle size of ≦ 0.1-5 microns. 3. Cyanidische Goldbäder nach Anspruch 1 und 2, dadurch gekennzeichnet , daß sie 50-150 g/l des feinkörnigen Feststoffschmiermittels enthalten.3. Cyanide gold baths according to claim 1 and 2, characterized in that they contain 50-150 g / l of the fine-grained solid lubricant. 4. Cyanidische Goldbäder nach Anspruch 1 und 2, dadurch gekennzeichnet , daß sie 5-15 g/l mindestens eines in sauren oder alkalischen Goldbädern löslichen Alkylsulfats enthalten.4. Cyanidic gold baths according to claim 1 and 2, characterized in that they contain 5-15 g / l of at least one alkyl sulfate soluble in acidic or alkaline gold baths. 5. Cyanidische Goldbäder nach Anspruch 1 bis 4, dadurch gekennzeichnet , daß sie als Feststoffschmiermittel feinkörnigen Graphit enthalten.5. Cyanidic gold baths according to claim 1 to 4, characterized in that they contain fine-grained graphite as solid lubricant. 6. Verfahren zur Herstellung von Feststoffschmiermittel-haltigen Gold-Dispersionsüberzügen mit einem Bad gemäß Anspruch 1 bis 5, dadurch gekennzeichnet , daß bei einer Temperatur von 20-70°C und einer Stromdichte von 0,2-40 A/dm2 abgeschieden wird.6. A process for the preparation of solid lubricant-containing gold dispersion coatings with a bath according to claim 1 to 5, characterized in that is deposited at a temperature of 20-70 ° C and a current density of 0.2-40 A / dm 2 . 7. Verwendung eines Bades nach Anspruch 1 bis 6 zum Herstellen von Goldüberzügen bei Relaiskontakten.7. Use of a bath according to claim 1 to 6 for the production of gold plating for relay contacts. 8. Verwendung eines Bades nach Anspruch 1 bis 6 zur Herstellung von Goldüberzügen bei Steckverbindern.8. Use of a bath according to claim 1 to 6 for the production of gold plating in connectors.
EP81106338A 1980-08-28 1981-08-14 Cyanide gold-baths and process for the galvanic deposition of gold-dispersion coatings that contain solid lubricant, and its application Expired EP0046912B1 (en)

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AT81106338T ATE8415T1 (en) 1980-08-28 1981-08-14 CYANIDIC GOLD BATHS AND PROCESSES FOR THE ELECTRICAL DEPOSITION OF SOLID LUBRICANT-CONTAINING GOLD DISPERSION BERZSSGEN AND ITS APPLICATION.

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DE19803032469 DE3032469A1 (en) 1980-08-28 1980-08-28 CYANIDIC GOLD BATHS AND GALVANIC DEPOSITION OF SOLID LUBRICANT-CONTAINING GOLD DISPERSION SURFACES AND ITS APPLICATION
DE3032469 1980-08-28

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EP0046912A1 true EP0046912A1 (en) 1982-03-10
EP0046912B1 EP0046912B1 (en) 1984-07-11

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* Cited by examiner, † Cited by third party
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EP0142615A1 (en) * 1983-08-03 1985-05-29 Siemens Aktiengesellschaft Bath and process for the galvanic deposition of noble metal or noble metal-containing dispersion coatings
WO2000079031A1 (en) * 1999-06-17 2000-12-28 Degussa Galvanotechnik Gmbh Acid bath for galvanic deposition of shining gold and gold alloy layers and brightener therefor
WO2013150028A1 (en) * 2012-04-02 2013-10-10 Haute Ecole Arc Galvanic bath for the electrolytic deposition of a composite material

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GB2251133B (en) * 1990-10-09 1995-03-15 Fuji Electric Co Ltd Sliding contactor for electric equipment
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0142615A1 (en) * 1983-08-03 1985-05-29 Siemens Aktiengesellschaft Bath and process for the galvanic deposition of noble metal or noble metal-containing dispersion coatings
WO2000079031A1 (en) * 1999-06-17 2000-12-28 Degussa Galvanotechnik Gmbh Acid bath for galvanic deposition of shining gold and gold alloy layers and brightener therefor
US6814850B1 (en) * 1999-06-17 2004-11-09 Umicore Galvanotechnik Gmbh Acid bath for electrodeposition of glossy gold and gold alloy layers and a gloss additive for same
WO2013150028A1 (en) * 2012-04-02 2013-10-10 Haute Ecole Arc Galvanic bath for the electrolytic deposition of a composite material
CH706336A1 (en) * 2012-04-02 2013-10-15 Haute Ecole Arc Galvanic bath for the electrolytic deposition of a composite material.

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DE3032469A1 (en) 1982-04-01
ATE8415T1 (en) 1984-07-15

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