DE664613C - Process for the production of a corrosion-resistant or colored and corrosion-resistant coating on oxidized surfaces of objects made of aluminum or aluminum alloys - Google Patents

Process for the production of a corrosion-resistant or colored and corrosion-resistant coating on oxidized surfaces of objects made of aluminum or aluminum alloys

Info

Publication number
DE664613C
DE664613C DEA67748D DEA0067748D DE664613C DE 664613 C DE664613 C DE 664613C DE A67748 D DEA67748 D DE A67748D DE A0067748 D DEA0067748 D DE A0067748D DE 664613 C DE664613 C DE 664613C
Authority
DE
Germany
Prior art keywords
corrosion
aluminum
resistant
production
colored
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
DEA67748D
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.)
ALUMINUM COLORS Inc
Original Assignee
ALUMINUM COLORS Inc
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 ALUMINUM COLORS Inc filed Critical ALUMINUM COLORS Inc
Application granted granted Critical
Publication of DE664613C publication Critical patent/DE664613C/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
    • C23C22/82—After-treatment
    • C23C22/83—Chemical after-treatment

Description

Verfahren zur Herstellung eines korrosionsbeständigen oder gefärbten und korrosionsbeständigen Überzugs auf oxydierten Oberflächen von - Gegenständen aus Aluminium oder Aluminiumlegierungen Durch das Patent 633 320 ist die Herstellung von. korrosionsbeständigen oder gefärbten und korrosionsbeständigen Überzügen auf oxydierten Oberflächen von Gegenständen aus Aluminium oder Aluminiumlegierungen durch Behandeln der Gegenstände mit einer Löstmg von Chromaten geschützt. Durch die Behandlung des so imprägnierten Oxydüberzuges in heißer wässeriger Lösung kann in bekannter Weise eine weitere Verbesserung der Korrosionsbeständigkeit der geschützten Oxydschichten herbeigeführt werden.Process for the production of a corrosion-resistant or colored and corrosion-resistant coating on oxidized surfaces of - objects made of aluminum or aluminum alloys. The patent 633 320 describes the production of. Corrosion-resistant or colored and corrosion-resistant coatings on oxidized surfaces of objects made of aluminum or aluminum alloys are protected by treating the objects with a solution of chromates. By treating the oxide coating impregnated in this way in a hot aqueous solution, a further improvement in the corrosion resistance of the protected oxide layers can be brought about in a known manner.

Es wurde nun weiterhin gefunden, d,aß diese erhöhte Korrosionsfestigkeit sauf vercinfachtem Wege dadurch erhalten werden kann, daß man die Aluminiumgegenstände nach Erzeugung des Oxydüberzuges mit den die Chromationen enthaltenden Lösungen in der Hitze behandelt. Man erhält dadurch eine weitere Erhöhung der Korrosionsbeständigkeit, wodurch die Erhaltung der Zugfestigkeit und Dehnung des Aluminiums außerordentlich günstig beeinflußt wird. Aluminiumoxydoberfl,ächen, welche nach dem neuen Verfahren behandelt wurden, habeneiner einjährigen Besprühung mit 2oo/oiger Natriumchloridlösung in ausgezeichneter Weise widerstanden, während Überzüge, welche mittels anodischer Oxydation in Schwefelsäure oder in 3 a/oiger Chroms;iure hergestellt wurden, einer solchen Behandlung nur in ganz ungenügender Weise standhielten.It has now also been found that this increased corrosion resistance ate It can be obtained in a simplified manner by making the aluminum objects after production of the oxide coating with the solutions containing the chromate ions treated in the heat. This gives a further increase in corrosion resistance, whereby the maintenance of the tensile strength and elongation of the aluminum is extraordinary is favorably influenced. Aluminum oxide surfaces, which after the new process have been sprayed with 2oo% sodium chloride solution for one year withstood in an excellent way, while coatings, which by means of anodic Oxidation in sulfuric acid or in 3% chromium acid, one withstood such treatment only inadequately.

Beispielsweise kann das Verfahren in der Weise durchgeführt werden, daß der auf der Aluminiumfläche hergestellte Oxydüberzug mit einer heißen, zweckmäßig über 8o' warmen Lösung behandelt wird, die ein Chromat- oder Dichromation enthält, und zwar zweckmäßig in der Form eines Alkalidichromats, oder auch in der Form von Chromsäure. Die Zeitdauer der Behandlung kann in weiten Grenzen, z. B. 5 bis .4o Minuten, schwanken.For example, the method can be carried out in such a way that that the oxide coating produced on the aluminum surface with a hot, expedient is treated over 8o 'warm solution which contains a chromate or dichromate ion, and expediently in the form of an alkali metal dichromate, or in the form of Chromic acid. The duration of the treatment can be within wide limits, e.g. B. 5 to .4o Minutes, sway.

Claims (1)

PATCNTAN5PRUCH: Weitere Ausbildung des Verfahrens -zur Herstellung eines korrosionsbeständigen" oder gefärbten und korrosionsbeständigen Überzuges :auf oxydierten Oberflächen von Gegenständen aus Aluminium oder Aluminiumlegierungen nach Patent 633 320, dadurch gekennzeichnet; daß die Nach-: behandlung in einer Chromationen enthaltenden Lösung von über 8o° erfolgt.PATCNTAN5PRUCH: Further development of the process -for the production of a corrosion-resistant "or colored and corrosion-resistant coating: on oxidized surfaces of objects made of aluminum or aluminum alloys according to patent 633 320, characterized in that the post-treatment: in a solution containing chromate ions of over 80 ° he follows.
DEA67748D 1932-05-26 1932-11-20 Process for the production of a corrosion-resistant or colored and corrosion-resistant coating on oxidized surfaces of objects made of aluminum or aluminum alloys Expired DE664613C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US664613XA 1932-05-26 1932-05-26

Publications (1)

Publication Number Publication Date
DE664613C true DE664613C (en) 1938-09-01

Family

ID=22069649

Family Applications (1)

Application Number Title Priority Date Filing Date
DEA67748D Expired DE664613C (en) 1932-05-26 1932-11-20 Process for the production of a corrosion-resistant or colored and corrosion-resistant coating on oxidized surfaces of objects made of aluminum or aluminum alloys

Country Status (1)

Country Link
DE (1) DE664613C (en)

Similar Documents

Publication Publication Date Title
DE672268C (en) Process for the production of opaque, enamel-like protective layers on aluminum and its alloys
DE827149C (en) Process for the production of coatings on iron, zinc and their alloys
DE813916C (en) Process for the electrolytic production of a protective coating on zinc
DE664613C (en) Process for the production of a corrosion-resistant or colored and corrosion-resistant coating on oxidized surfaces of objects made of aluminum or aluminum alloys
DE601521C (en) Process for the production of a corrosion protection coating on magnesium and magnesium alloys
DE2017865A1 (en) Process for increasing the corrosion resistance of metals coated with transducers. Arun: Pennwalt Corp., Philadelphia, Pa. (V.St.A.)
DE734859C (en) Process for producing layers on iron and iron alloys
DE717183C (en) Process for the production of black-colored, corrosion-resistant protective layers on the surface of objects made of aluminum or aluminum alloys
DE2039912A1 (en) Direct enamelling process
DE3118794A1 (en) METHOD FOR TREATING THE SURFACE OF ZINC, CADMIUM AND ITS ALLOYS
DE641933C (en) Process to increase the adhesion and service life of coatings of paint, varnish, etc. Like. On corrosion-prone heavy metal surfaces, especially those made of iron and iron alloys
CH361452A (en) Process for the production of chromate coatings on objects made of magnesium or its alloys
DE1621467B2 (en) PROCESS FOR RE-TREATMENT OF OXIDE PROTECTIVE COATINGS OR OTHER CONVERSION COATINGS ON METAL SURFACES
DE635261C (en) Process for the production of a corrosion-resistant coating on objects made of zinc alloys
DE706347C (en) Process for the treatment of unpainted coatings made of so-called white brass
DE475789C (en) Process for the production of coatings on aluminum and its alloys
DE1621467C3 (en) Process for the aftertreatment of protective oxide layers or other conversion coatings on metal surfaces
DE718601C (en) Process for the surface treatment of zinc alloys containing aluminum
DE692124C (en) Process for the electrolytic oxidation of iron and steel
DE633320C (en) Process for the production of a corrosion-resistant or colored and corrosion-resistant coating on oxidized surfaces of objects made of aluminum or aluminum alloys
DE458562C (en) Process for the production of oxidic coatings on magnesium
DE615665C (en) Process for the production of protective coatings on zinc and galvanized objects
DE494262C (en) Process for the production of oxidic coatings on light metals in oxidizing solutions
DE740785C (en) Process for surface protection of zinc and zinc alloys by treatment with alkaline chromate solutions
DE692667C (en) Process for producing fine crystalline phosphate layers on zinc, iron and their alloys