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DE677501C - Process for the creation of brass-like colors on aluminum alloys - Google Patents

Process for the creation of brass-like colors on aluminum alloys

Info

Publication number
DE677501C
DE677501C DES123833D DES0123833D DE677501C DE 677501 C DE677501 C DE 677501C DE S123833 D DES123833 D DE S123833D DE S0123833 D DES0123833 D DE S0123833D DE 677501 C DE677501 C DE 677501C
Authority
DE
Germany
Prior art keywords
brass
aluminum
alloys
aluminum alloys
colors
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
DES123833D
Other languages
German (de)
Inventor
Karl Voss
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.)
Siemens and Halske AG
Siemens AG
Original Assignee
Siemens and Halske AG
Siemens AG
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 Siemens and Halske AG, Siemens AG filed Critical Siemens and Halske AG
Priority to DES123833D priority Critical patent/DE677501C/en
Application granted granted Critical
Publication of DE677501C publication Critical patent/DE677501C/en
Expired legal-status Critical Current

Links

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
    • C25D11/14—Producing integrally coloured layers

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electroplating And Plating Baths Therefor (AREA)

Description

Verfahren zur Erzeugung messingähnlicher Farbtöne auf Aluminiumlegierungen Es ist bekannt, Reinaluminium sowie vers 'hiedenen Aluminiumlegierungen durch elekc z# trolytische Oxydation das Aussehen von Messing oder Bronze zu geben. Man erzielt diese Wirkung z. B. durch Wechselstrombehandlung der Teile in Oxalsäurelösungen verschiedener Konzentration in der Wärme bei Stromdichten von 3 bis 5 A/dm-. Das bekannte Verfahren versagte aber überraschenderweise in der Praxis bei kupfer- und/oder manganhaltigen Aluminiumlegierungen sowie Aluminium-Magnesium-Silicium-Legierungen, z. B. Aluminium-Kupfer-Magnesium-, Aluminium-Mangan-, Aluminium-Kupfer-Mangan-Legierungen, und zwar selbst in Fällen, wo hohe Stromdichten zur Anwendung gelangten. Die Unmöglichkeit der Färbung dieser Legierungen auf dem bekannten Wege ist aber um so nachteiliger, als gerade sie zufolge ihrer höheren Festigkeit häufig zu Profilteilen aller Art verarbeitet werden, denen man gern eine bronze- oder messingartige Färbung erteilen würde.Process for the production of brass-like colors on aluminum alloys It is known that pure aluminum and various aluminum alloys by elekc z # trolytic oxidation to give the appearance of brass or bronze. One achieves this effect z. B. by AC treatment of the parts in oxalic acid solutions different concentration in the heat with current densities of 3 to 5 A / dm-. That known methods surprisingly failed in practice with copper and / or manganese-containing aluminum alloys and aluminum-magnesium-silicon alloys, z. B. aluminum-copper-magnesium, aluminum-manganese, aluminum-copper-manganese alloys, even in cases where high current densities were used. The impossibility the coloring of these alloys in the known way is all the more disadvantageous, than they are often used for profile parts of all kinds due to their higher strength processed, which one likes to give a bronze or brass-like coloration would.

Gemäß der Erfindung gelingt es, die erwähnten kupfer- und/oder manganhaltigen Aluminiumlegierungen sowie Aluminium-Magnesium-Silicium-Legierungen messingähnlich anzufärben, indem man sie der Wechs.elstromelektrooxydation in einem phenolsulfosauren Elektrolyten unterwirft. Als besonders geeigneter Elektrolyt hat sich hierfür technische Kresolsulfosäure erwiesen. Die Legierungen wurden dabei .einwandfrei messinggelb gefärbt. Die Verwendung der genannten Elektrolyte zur elektrolytischen Oxydation von Aluminium und anderen Aluminiumlegierungen als die oben genannten ist nicht Gegenstand der Erfindung. Ausführungsbeispiel Je zwei 5 o X 100 X r mm große Duralbleche, die als Gegenelektroden geschaltet waren, wurden in 5 %iger technischer Kresolsulfosäure bei einer Spannung von zoo V und einer Stromdichte von 3 A/dm2 30 Minuten lang oxydiert, wobei sie einen hellen Messington annahmen.According to the invention, it is possible to color the mentioned copper and / or manganese-containing aluminum alloys and aluminum-magnesium-silicon alloys in a brass-like manner by subjecting them to alternating current electro-oxidation in a phenol sulfonic acid electrolyte. Technical cresol sulfonic acid has proven to be a particularly suitable electrolyte for this purpose. The alloys were colored flawlessly brass yellow. The use of the above-mentioned electrolytes for the electrolytic oxidation of aluminum and aluminum alloys other than those mentioned above is not the subject of the invention. Embodiment The two 5 o X 1 00 X r mm Duralbleche, which were connected as counter electrodes were oxidized dm2 for 30 minutes in 5% technical Kresolsulfosäure at a voltage of zoo V and a current density of 3 A /, being a bright Messington assumed.

Merkwürdigerweise läßt sich das neue Verfahren nicht auf Reinaluminium und solche Aluminiumlegierungen übertragen, deren messinggelbe Anfärbung auf dem bekannten Wege in Oxalsäure gut gelingt. Bei diesen Stoffen erhält man bei Anwendung der neuen Regel nur schmutziggraue Farbtöne. `Strangely enough, the new process cannot be applied to pure aluminum and those aluminum alloys are transferred whose brass-yellow coloring on the known routes in oxalic acid work well. With these substances you get when applied the new rule only dirty gray shades. `

Claims (1)

PATENTANSPRÜCHE: I. Verfahren zur Erzeugung messing-oder bronzeartiger oxydischer Überzüge auf kupferhaltigen und/oder manganhaltigere Aluminiumlegierungen, dadurch gekennzeichnet; daß die Teile elektrolytisch mittels Wechselstrom in einem phenolöder kresolsulfosauren Elektrolyten behandel, werden. z. Anwendung des Verfahrens nach Anspruch i auf Aluminiuin-Magnesium-Silicium-Legierung en.PATENT CLAIMS: I. Process for the production of brass or bronze-like oxidic coatings on copper-containing and / or manganese-containing aluminum alloys, characterized; that the parts electrolytically by means of alternating current in one phenolic or cresol sulfonic acid electrolytes. z. Application of the procedure according to claim i on aluminum-magnesium-silicon alloys.
DES123833D 1936-08-14 1936-08-14 Process for the creation of brass-like colors on aluminum alloys Expired DE677501C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DES123833D DE677501C (en) 1936-08-14 1936-08-14 Process for the creation of brass-like colors on aluminum alloys

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES123833D DE677501C (en) 1936-08-14 1936-08-14 Process for the creation of brass-like colors on aluminum alloys

Publications (1)

Publication Number Publication Date
DE677501C true DE677501C (en) 1939-06-27

Family

ID=7536370

Family Applications (1)

Application Number Title Priority Date Filing Date
DES123833D Expired DE677501C (en) 1936-08-14 1936-08-14 Process for the creation of brass-like colors on aluminum alloys

Country Status (1)

Country Link
DE (1) DE677501C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3370943A (en) * 1965-11-04 1968-02-27 Kaiser Aluminium Chem Corp Aluminum alloy

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3370943A (en) * 1965-11-04 1968-02-27 Kaiser Aluminium Chem Corp Aluminum alloy

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