DE488554C - Process for the production of coatings on light metals - Google Patents

Process for the production of coatings on light metals

Info

Publication number
DE488554C
DE488554C DEJ31815D DEJ0031815D DE488554C DE 488554 C DE488554 C DE 488554C DE J31815 D DEJ31815 D DE J31815D DE J0031815 D DEJ0031815 D DE J0031815D DE 488554 C DE488554 C DE 488554C
Authority
DE
Germany
Prior art keywords
coatings
production
light metals
baths
water
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
DEJ31815D
Other languages
German (de)
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.)
Dr Otto Sprenger Patentverwertung Jirotka Mbh
Original Assignee
Dr Otto Sprenger Patentverwertung Jirotka Mbh
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 Dr Otto Sprenger Patentverwertung Jirotka Mbh filed Critical Dr Otto Sprenger Patentverwertung Jirotka Mbh
Priority to DEJ31815D priority Critical patent/DE488554C/en
Priority to DEJ32358D priority patent/DE489974C/en
Application granted granted Critical
Publication of DE488554C publication Critical patent/DE488554C/en
Expired legal-status Critical Current

Links

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
    • C23C22/06—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 aqueous acidic solutions with pH less than 6
    • C23C22/34—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 aqueous acidic solutions with pH less than 6 containing fluorides or complex fluorides
    • C23C22/37—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 aqueous acidic solutions with pH less than 6 containing fluorides or complex fluorides containing also hexavalent chromium compounds
    • 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
    • C23C22/06—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 aqueous acidic solutions with pH less than 6
    • C23C22/24—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 aqueous acidic solutions with pH less than 6 containing hexavalent chromium compounds
    • 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
    • C23C22/06—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 aqueous acidic solutions with pH less than 6
    • C23C22/24—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 aqueous acidic solutions with pH less than 6 containing hexavalent chromium compounds
    • C23C22/26—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 aqueous acidic solutions with pH less than 6 containing hexavalent chromium compounds containing also organic compounds
    • C23C22/27—Acids

Landscapes

  • 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 Leichtmetallen Zusatz zum Patent 475 789 In dem Patent 475 789 ist ein Verfahren beschrieben, auf Leichtmetallen, insbesondere Aluminium, Magnesium und seinen Legierungen, einen oxydischen Uberzug dadurch herzustellen, daß die Metalle reit einem wasserlöslichen Chromat und Flußsäure enthaltenden Bad behandelt werden. Diesen Bädern können noch in kleinen Mengen Schwermetallsalze beigegeben sein.Process for the production of coatings on light metals additive to the patent 475 789 In the patent 475 789 a process is described, on light metals, in particular aluminum, magnesium and their alloys, an oxide coating by producing the metals with a water-soluble chromate and hydrofluoric acid containing bath. These baths can contain small amounts of heavy metal salts be added.

Es wurde nun gefunden, daß oxydische Überzüge von anderem Farbcharakter erhalten werden können, wenn den Bädern wasserlösliche Permanganate zugesetzt werden, wobei die Menge des Chromates verringert werden kann.It has now been found that oxide coatings of a different color character can be obtained if water-soluble permanganates are added to the baths, whereby the amount of chromate can be reduced.

Es ist bekannt, für elektrotechnische Zwecke bestimmte Metallgegenstände mit einem elektrisch isolierenden Uberzug aus Oxyden des Mangans zu versehen, indem solche Gegenstände, z. B. Aluminiumdraht, nach geeigneter Vorbehandlung in auf 8o bis ioo ° erhitzte saure Bäder, die Kaliumpermanganat enthalten, eingetaucht.werden. Der so erhaltene Überzug besitzt braune bis schwarze Farbe.It is known to use metal objects intended for electrical engineering purposes to be provided with an electrically insulating coating of oxides of manganese by such items, e.g. B. aluminum wire, after suitable pretreatment in to 8o Acidic baths heated to 100 ° and containing potassium permanganate can be immersed. The coating obtained in this way is brown to black in color.

Von diesem Verfahren unterscheidet sich das nach vorliegender Erfindung dadurch, daß in Gegenwart der Chromate bzw. Bichromate übrigens nicht elektrisch isolierende Überzüge erhalten werden, welche je nach, der Menge des verwandten Permanganates bzw. Chromates in ihrer Farbe von Gelb über Goldrot, Hellbraun und Dunkelbraun bis Blauschwarz variieren.This differs from this method according to the present invention by the fact that in the presence of the chromates or bichromates it is not electrical insulating coatings are obtained, depending on the amount of permanganate used or chromates in their color from yellow to golden red, light brown and dark brown to Blue-black vary.

In Gegenwart des Bichromates sind die Bäder viel länger haltbar, als wenn Permanganat allein verwandt wird. Auch bildet sich der Überzug bereits bei niedrigeren Temperaturen; als sie nach dem älteren Patent angewandt werden müssen.In the presence of the bichromate, the baths last much longer than when permanganate is used alone. The coating is also already forming lower temperatures; than they have to be applied according to the earlier patent.

Die Überzüge nach vorliegender Erfindung sollen und können nicht für Isolationszwecke benutzt werden, dienen viehmehr hauptsächlich, z. B. auf Autokarosserien, als Ersatz eines farbigen Anstriches.The coatings of the present invention should not and cannot be used for Isolation purposes are used, serve much more mainly, z. B. on car bodies, as a replacement for colored paint.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung von Überzügen auf Leichtmetallen nach Patent 475 789, dadurch gekennzeichnet, daß Aluminium, Magnesium und ihre Legierungenvornehmlichin der Kälte mit Bädern behandelt werden, die außer Flußsäure, wasserlöslichen Salzen der Chromsäure und geringen Beimischungen von Schwermetallsalzen gemäß dem Hauptpatent noch wasserlösliche Salze der Permangansäure enthalten.PATENT CLAIM: Process for the production of coatings on light metals according to patent 475 789, characterized in that aluminum, magnesium and their alloys predominantly the cold are treated with baths which, in addition to hydrofluoric acid, water-soluble salts the chromic acid and small admixtures of heavy metal salts according to the main patent still contain water-soluble salts of permanganic acid.
DEJ31815D 1927-07-26 1927-07-26 Process for the production of coatings on light metals Expired DE488554C (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DEJ31815D DE488554C (en) 1927-07-26 1927-07-26 Process for the production of coatings on light metals
DEJ32358D DE489974C (en) 1927-07-26 1927-10-08 Process for the production of coatings on light metals

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEJ31815D DE488554C (en) 1927-07-26 1927-07-26 Process for the production of coatings on light metals
DEJ32358D DE489974C (en) 1927-07-26 1927-10-08 Process for the production of coatings on light metals

Publications (1)

Publication Number Publication Date
DE488554C true DE488554C (en) 1930-01-06

Family

ID=61187021

Family Applications (2)

Application Number Title Priority Date Filing Date
DEJ31815D Expired DE488554C (en) 1927-07-26 1927-07-26 Process for the production of coatings on light metals
DEJ32358D Expired DE489974C (en) 1927-07-26 1927-10-08 Process for the production of coatings on light metals

Family Applications After (1)

Application Number Title Priority Date Filing Date
DEJ32358D Expired DE489974C (en) 1927-07-26 1927-10-08 Process for the production of coatings on light metals

Country Status (1)

Country Link
DE (2) DE488554C (en)

Also Published As

Publication number Publication date
DE489974C (en) 1930-01-23

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