DE954660C - Process for the production of objects from light metals, in particular from aluminum or aluminum alloys with a multicolored oxidic surface - Google Patents

Process for the production of objects from light metals, in particular from aluminum or aluminum alloys with a multicolored oxidic surface

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Publication number
DE954660C
DE954660C DESCH10712A DESC010712A DE954660C DE 954660 C DE954660 C DE 954660C DE SCH10712 A DESCH10712 A DE SCH10712A DE SC010712 A DESC010712 A DE SC010712A DE 954660 C DE954660 C DE 954660C
Authority
DE
Germany
Prior art keywords
aluminum
oxidation
multicolored
production
objects
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
DESCH10712A
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.)
Schoch Eloxal Geb GmbH
Original Assignee
Schoch Eloxal Geb GmbH
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 Schoch Eloxal Geb GmbH filed Critical Schoch Eloxal Geb GmbH
Priority to DESCH10712A priority Critical patent/DE954660C/en
Application granted granted Critical
Publication of DE954660C publication Critical patent/DE954660C/en
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02—Anodisation
    • C25D11/04—Anodisation of aluminium or alloys based thereon
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02—Anodisation
    • C25D11/04—Anodisation of aluminium or alloys based thereon
    • C25D11/14—Producing integrally coloured layers

Description

Verfahren zur Herstellung von Gegenständen aus Leichtmetallen, insbesondere aus Aluminium oder Aluminiumlegierungen mit mehrfarbiger oxydischer Oberfläche Die Erfindung betrifft ein Verfahren zur Herstellung von Gegenständen aus Leichtmetall, insbesondere aus Aluminium oder Aluminiumlegierung, mit mehrfarbiger oxydischer Oberfläche, insbesondere elektrolytisch oxydierter Oberfläche.Process for the production of objects from light metals, in particular Made of aluminum or aluminum alloys with a multicolored oxide surface Die The invention relates to a method for the production of objects made of light metal, in particular made of aluminum or aluminum alloy, with multicolored oxidic Surface, in particular an electrolytically oxidized surface.

Sie bezweckt eine Verbesserung der dem Patent 937 682 zugrunde liegenden Erfindung.Its purpose is to improve the invention on which patent 937,682 is based.

Nach dem Hauptpatent 937 682 wird so" vorgegangen, daß der Gegenstand mit einer durchgehend gleichfarbigen Oxydschicht versehen, dann passiviert, z. B. mit einer Paraffinschicht überzogen, daraufhin an den in anderer Färbung gewünschten Stellen die zuerst erzeugte Oxydschicht entfernt, z. B. abgeschliffen, alsdann der Gegenstand erneut der Oxydation bei anderer Farbgebung unterworfen und schließlich, gegebenenfalls nach Wiederholung der Passivierung und der Oxydation, der Passivierungsüberzug z. B. mit heißem Wasser beseitigt wird.According to the main patent 937 682 , the procedure is that the object is provided with an oxide layer of the same color throughout, then passivated, e.g. coated with a paraffin layer, and then the oxide layer that was created first is removed from the places desired in a different color, e.g. sanded off, then the object is again subjected to oxidation with a different color and finally, if necessary after repeating the passivation and oxidation, the passivation coating is removed, e.g. with hot water.

Haupterfindungsgemäß werden also die in der ersten Arbeitsstufe in üblicher Weise oxydierten, gefärbten und nachverdichteten Flächen einer Passivierung unterzogen, z. B. mit einem Paraffinüberzug versehen, um sie davor zu schützen, daß sie in der zweiten Arbeitsstufe, also beim Nachoxydieren der in anderer Farbe gewünschten Flächen, angegriffen werden. Der Passivierungsüberzug muß dann später wieder beseitigt werden.According to the main invention, the in the first work stage in Usually oxidized, colored and compacted surfaces of a Passivation subjected, e.g. B. provided with a paraffin coating to protect them from that they are in the second stage of work, i.e. when oxidizing them in a different color desired surfaces to be attacked. The passivation coating must then be applied later be eliminated again.

Es wurde nun gefunden, daß die Passivierung der oxydierte. Flächen entbehrlich ist, indem die beiden Oxydationsvorgänge unter verschiedenen Bedingungen, z. B. bei unterschiedlicher Badtemperatur, vollzogen werden, vorzugsweise die Nachoxydation bei einer geringeren Badtemperatur von beispielsweise 8 bis 1q.° C durchgeführt wird. Es wird also :erfindungsgemäß so vorgegangen,, daß der Gegenstand mit einer durchgehend gleichfarbigen Oxydschicht versehen, dann an den in anderer Färbung gewünschten Stellen die so erzeugte Oxydschicht entfernt, z. B. abgeschliffen, und daraufhin der Gegenstand bei geänderten Arbeitsbedingungen, vorteilhafterweise bei verminderter Badtemperatur, erneut der Oxydation bei anderer Farbgebung unterworfen wird.It has now been found that the passivation of the oxidized. Surfaces can be dispensed with, as the two oxidation processes under different conditions, z. B. be carried out at different bath temperatures, preferably the post-oxidation carried out at a lower bath temperature of, for example, 8 to 1q. ° C will. It is thus: proceeded according to the invention, that the object with a Oxide layer of the same color throughout, then on those in a different color desired locations removed the oxide layer thus generated, z. B. abraded, and thereupon the object with changed working conditions, advantageously at reduced bath temperature, subjected to oxidation again with a different color will.

Der Erfindung liegt, was die Anwendung unterschiedlicher Badtemperaturen anlangt, die Erkenntnis zugrunde, daß Oxydschichten, welche bei unterschiedlicher Badtemperatur erzeugt sind; sich in Gefügeaufbau und -dichte unterscheiden. Sie geht davon aus, daß eine Oxydschicht bestimmter Struktur keiner nachteiligen Beeinflussung unterliegt, wenn sie einem Oxydationsvorgang ausgesetzt wird, der unter Anwendung einer anderen Arbeitstemperatur zur Erzeugung einer Oxydschicht anderer Struktur durchgeführt wird.The invention is what the application of different bath temperatures arrives, based on the knowledge that oxide layers, which with different Bath temperature are generated; differ in structure and density. she assumes that an oxide layer of certain structure does not have any adverse effect subject to oxidation when subjected to the application a different working temperature to produce an oxide layer with a different structure is carried out.

Die Zusatzerfindung bringt den Fortschritt, daß beim Herstellen von Leichtmetall-, z. B. Aluminiumgegenständen mit mehrfarbiger oxydischer Oberfläche wenigstens zwei Arbeitsgänge, nämlich das Passivieren und die Entfernung des Passivierungsüberzugs, entfallen. Es ist auch der Fertigungsaufwand an Zeit und Rohstoffen vermindert.The additional invention brings the advance that in the manufacture of Light metal, e.g. B. Aluminum objects with a multicolored oxidic surface at least two operations, namely passivation and removal of the passivation coating, omitted. It also reduces the production expenditure in terms of time and raw materials.

Claims (2)

PATENTANSPRÜCHE: i. Verfahren zur Herstellung von Gegenständen aus Leichtmetall, insbesondere aus Aluminium oder Aluminiumlegierungen mit mehrfarbiger oxydischer Oberfläche, insbesondere elektrolytisch oxydierter Oberfläche. v.-obei gemäß Patent 937 682 der durchgelierid gleichfarbig o lydierte Gegenstand nach Errtfernung der dabei erzeugten Oxydschicht an den in anderer Färbung gewünschten Stellen einer nochmaligen Oxydation bei anderer Farbgebung unterworfen wird, dadurch gekennzeichnet, daß das Nachoxydieren unter anderen Arbeitsbedingungen, vorzugsweise bei anderer Badtemperatur als die Voroxydation, erfolgt. PATENT CLAIMS: i. Process for the production of objects made of light metal, in particular made of aluminum or aluminum alloys with a multicolored oxidic surface, in particular an electrolytically oxidized surface. v.-obei according to patent 937 682 the gelierid o lydierte object after the removal of the oxide layer produced in the process is subjected to renewed oxidation with a different color in the places desired in a different color, characterized in that the post-oxidation under different working conditions, preferably at a different bath temperature than the pre-oxidation takes place. 2. Verfahren nach Anspruch i, dadurch gekennzeichnet, daß die Nachoxydation bei geringerer Badtemperatur als die Voroxy dation, vornehmlich bei 8 bis W C, erfolgt.2. The method according to claim i, characterized in that the post-oxidation at a lower bath temperature than the Voroxy dation, mainly at 8 to W C, takes place.
DESCH10712A 1952-10-14 1952-10-14 Process for the production of objects from light metals, in particular from aluminum or aluminum alloys with a multicolored oxidic surface Expired DE954660C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DESCH10712A DE954660C (en) 1952-10-14 1952-10-14 Process for the production of objects from light metals, in particular from aluminum or aluminum alloys with a multicolored oxidic surface

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DESCH10712A DE954660C (en) 1952-10-14 1952-10-14 Process for the production of objects from light metals, in particular from aluminum or aluminum alloys with a multicolored oxidic surface

Publications (1)

Publication Number Publication Date
DE954660C true DE954660C (en) 1956-12-20

Family

ID=7426346

Family Applications (1)

Application Number Title Priority Date Filing Date
DESCH10712A Expired DE954660C (en) 1952-10-14 1952-10-14 Process for the production of objects from light metals, in particular from aluminum or aluminum alloys with a multicolored oxidic surface

Country Status (1)

Country Link
DE (1) DE954660C (en)

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