DE462507C - Process for the production of coatings on objects made of metals - Google Patents

Process for the production of coatings on objects made of metals

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Publication number
DE462507C
DE462507C DEJ30611D DEJ0030611D DE462507C DE 462507 C DE462507 C DE 462507C DE J30611 D DEJ30611 D DE J30611D DE J0030611 D DEJ0030611 D DE J0030611D DE 462507 C DE462507 C DE 462507C
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DE
Germany
Prior art keywords
coatings
metals
production
alloys
objects made
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.)
Expired
Application number
DEJ30611D
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German (de)
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Individual
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Individual
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.)
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Publication date
Application filed by Individual filed Critical Individual
Priority to DEJ30611D priority Critical patent/DE462507C/en
Application granted granted Critical
Publication of DE462507C publication Critical patent/DE462507C/en
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • 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
    • C23C22/05—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 using aqueous solutions
    • C23C22/60—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 using aqueous solutions using alkaline aqueous solutions with pH greater than 8

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  • Chemical & Material Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Treatment Of Metals (AREA)

Description

Verfahren zur Herstellung von Überzügen auf Gegenständen aus metallen Zusatz zum Patent 442 766 In der Patentschrift 442 766 ist ein Verfahren beschrieben «-orden, meta'_.li,ch aussehende überzüge auf Aluminium und Aluminiumlegierungen durch Eintauchen in eine Salzlösung zu erhalten, die Salze der Scli«-ermetalle und Alkalicarbonate enthält, daneben noch in den meisten Fällen Alkalichromat.Process for the production of coatings on objects made of metals Addendum to Patent 442 766 Patent 442 766 describes a method «-Orden, meta '_. Li, ch looking coatings on aluminum and aluminum alloys by immersion in a saline solution to obtain the salts of the Scli'-metals and Contains alkali carbonates and in most cases alkali chromate.

Es gelangten nach dem Beispiel dieser Erfindung Bäder zur Verwendung, die etwa i O .o Schwermetallsalze und 2 0;ö Carbanate neben etwa o,4 ° " Alkalichromat enthielten.Baths were used according to the example of this invention, the about 10.0 heavy metal salts and 20.0 carbanates in addition to about 0.4 “alkali chromate contained.

Es wurde nun gefunden, daß man zu wesentlich anderen Ergebnissen gelangen kann, wenn man die Konzentration an Sch«-ermetallsalz und Alkalichromat etwa auf der gleichen Höhe erhält, wie in dem Hauptpatent beschrieben, die Konzentration an AIkalicarbonaten aber wesentlich steigert. Es kommen dann die Schwermetalle aus den Bädern nicht mehr in metallisch aussehender Form zur Ausscheidung auf dem Aluminium, sondern- sie werden in olvdisch aussehender Form niedergeschlagen. In einem so zusammengesetzten Bade schied sich das fZupfer dem Aussehen nach als rotgelbes 0x%-,1 aus. Nickel und Kobalt, Zinn, Silber usw. lieferten hell- bis dunkelgraue, vielfach irisierende Überzüge. Es zeigte sich, daß die oxy<iartigen Kupferüberzüge aus diesen Bädern außer auf Aluminium auch auf Magniesiuni und seinen Legierungen sowie auch auf Zink niedergeschlagen werden können und daß die oxydartigen Schwerinetallüberzüge zwar nicht auf Zink,: aber auf llagnesium und seinen Legierungen erzeugt werden - konnten.It has now been found that one arrive at significantly different results can, if the concentration of Sch «metal salt and alkali chromate is about the same level as described in the main patent, the concentration but significantly increases in alkali carbonates. Then the heavy metals come out the baths no longer look metallic for precipitation on the aluminum, but- they are knocked down in an olvdish-looking form. In such a compound In bathing, the fZupfer looked like a red-yellow 0x% -, 1. nickel and cobalt, tin, silver etc. produced light to dark gray, often iridescent Coatings. It was found that the oxy-like copper coatings from these baths apart from aluminum also on Magniesiuni and its alloys as well as on zinc can be precipitated and that the oxide-like heavy metal coatings though not on zinc, but on llagnesium and its alloys - could.

Ein für das Verfahren nach vorliegender Erfindung geeignetes Bad enthält auf i 1 Flüssigkeit io g Schwermetallsalze, wie Kupfersulfat, Nickelchlorid, Kobaltchlorid, Zinnsulfat, Silbernitrat usw., 2112g Alkalichromat, ioo g haliumcarbonat und 8o g Natriumbicarbonat. Die Bildung der oxydartigen Überzüge auf Aluminium und seinen Legierungen sowie auch auf Magnesium und Magnesiumlegierungen und endlich Zitik erfolgt in heißen Bädern in wenigen Minuten. Geht man in der Konzentration des Gesamt alkalicarbonates bis auf etwa io % herab, so erfolgt das Aufziehen des Überzuges etwas langsamer.A bath suitable for the process according to the present invention contains 10 g heavy metal salts, such as copper sulphate, nickel chloride, cobalt chloride, tin sulphate, silver nitrate, etc., 2112 g alkali chromate, 100 g halium carbonate and 80 g sodium bicarbonate per 1 liquid. The formation of oxide-like coatings on aluminum and its alloys as well as on magnesium and magnesium alloys and finally Zitik takes place in a few minutes in hot baths. If the concentration of the total alkali carbonate is reduced to about 10%, the peeling-off of the coating takes place somewhat more slowly.

Claims (1)

PATENTANSPRÜCHE: i. Ausbildung des Verfahrens nach Patent 442 766 zur Herstellung \.on Cberzügen auf Gegenständen aus :Metallen durch Eintauchen in eine heiße, Schwermetallsalze und Alkali,carbonate enthaltende Lösung, dadurch gekennzeichnet, daß Bäder mit i o und mehr Prozent Alkalicarbonat Verwendung finden, wobei die Schwermetalle nicht in metallisch, sondern in o:cydisch aussehender Form auf dem Grundmetall, insbesondere Aluminium, aufziehen. a. Ausbildung des Verfahrens nach Anspruch i, dadurch gekennzeichnet, claß bei Verwendung von Kupfersalzen die ox,-a= artigen Überzüge auch auf Magnesium. und seinen Legierungen wie auch auf Zink hergestellt werden. 3. Ausbildung des Verfahrens nach Anspruch i, dadurch gekennzeichnet, daß bei Verwendung von Salzen der übrigen Schwermetalle die oxydartigen Gberzüge ' auf Magnesium und seinen Legierungen hergestellt werden.PATENT CLAIMS: i. Development of the method according to patent 442 766 for the production of coatings on objects made of: metals by immersion in a hot solution containing heavy metal salts and alkali carbonates, characterized in that baths with 10 and more percent alkali carbonate are used, the heavy metals not in metallic, but in o: cydic-looking form on the base metal, in particular aluminum. a. Design of the method according to claim 1, characterized in that when using copper salts, the ox, -a = -like coatings also apply to magnesium. and its alloys as well as zinc. 3. Formation of the method according to claim i, characterized in that when using salts of the other heavy metals, the oxide-like Gberzüge 'are produced on magnesium and its alloys.
DEJ30611D 1927-03-13 1927-03-13 Process for the production of coatings on objects made of metals Expired DE462507C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEJ30611D DE462507C (en) 1927-03-13 1927-03-13 Process for the production of coatings on objects made of metals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEJ30611D DE462507C (en) 1927-03-13 1927-03-13 Process for the production of coatings on objects made of metals

Publications (1)

Publication Number Publication Date
DE462507C true DE462507C (en) 1928-07-12

Family

ID=7203952

Family Applications (1)

Application Number Title Priority Date Filing Date
DEJ30611D Expired DE462507C (en) 1927-03-13 1927-03-13 Process for the production of coatings on objects made of metals

Country Status (1)

Country Link
DE (1) DE462507C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE739605C (en) * 1939-12-07 1943-09-30 Albert Butziger Process for converting the surface of magnesium or magnesium alloys into an electrically non-conductive, corrosion-resistant layer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE739605C (en) * 1939-12-07 1943-09-30 Albert Butziger Process for converting the surface of magnesium or magnesium alloys into an electrically non-conductive, corrosion-resistant layer

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