DE721755C - Process for coloring aluminum and aluminum alloys - Google Patents
Process for coloring aluminum and aluminum alloysInfo
- Publication number
- DE721755C DE721755C DEV36120D DEV0036120D DE721755C DE 721755 C DE721755 C DE 721755C DE V36120 D DEV36120 D DE V36120D DE V0036120 D DEV0036120 D DE V0036120D DE 721755 C DE721755 C DE 721755C
- Authority
- DE
- Germany
- Prior art keywords
- weight
- aluminum
- solution
- parts
- ammonium
- 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
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
- C23C22/40—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 molybdates, tungstates or vanadates
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)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Description
Verfahren zum Färben von Aluminium und Aluminiumlegierungen Die Erfindung betrifft ein Verfahren zur Oberflächenbehandlung von Aluminium und seinen Legierungen, und zwar zum Färben von kleinen Fertigteilen, z. B. Schrauben, Muttern u. dgl. in mattem, schwarzem Ton.Method of coloring aluminum and aluminum alloys The invention relates to a process for the surface treatment of aluminum and its alloys, namely for dyeing small finished parts, e.g. B. screws, nuts and the like in matt black tone.
Es ist zwar bekannt, Teile aus Aluminiumlegierungen durch elektrolytische Oxydation dunkel zu färben. Dieses Verfahren hat aber den Nachteil, daß es bei deinen und kleinsten Teilen nicht wirtschaftlich angewendet werden kann, da jedes Ader Teile. einzeln in dem Bad aufgehängt werden muß, um einen guten elektrischen Kontakt zu gewährleisten.Although it is known that parts made of aluminum alloys by electrolytic Oxidation to stain dark. However, this method has the disadvantage that your and the smallest parts cannot be used economically, since every wire Parts. must be hung individually in the bathroom to ensure good electrical contact to ensure.
Es ist ferner bekannt, eine Schwarzfärbung bei Metallen durch Aufbrennen von Fetten, ölen, Harzen, Eiweiß, Tannin u. dgl. herbeizuführen. Dieses Verfahren ist jedoch sehr umstndlich und daher ebenfalls nicht wirtschaftlich.It is also known that metals can be blackened by burning on of fats, oils, resins, protein, tannin and the like. This method however, it is very cumbersome and therefore also not economical.
Daneben fanden in. der Literatur auch Färbeverfahren für Aluminium und seine Legierungen Erwähnungen, bei denen die Färbelösungen auf der Grundläge von Molybdaten, z. B. Ammoniummolybäaten, mit Zusätzen von Fluor- oder Kieselfluorwasserstoffsäuren und Zinksalzen oder Ammoniumsalzen verwendet wurden. Ohne Vorbeizen ergab sich hierbei keine ausreichende Dunkelfärbung von guter Haftfestigkeit, während mit bekannter Vorbeizung die Färbung zwar dunkler ausfiel, jedoch nicht schwarz. Außerdem besaßen diese bekannten Verfahren den Nachteil, daß die Lösungen in größerem Umfange zum Teil sogar in konzentrierter Form Giftstoffe, wie Oxalate oder Fluoride, enthielten, was die Anwendung erschwerte.In addition, dyeing processes for aluminum have also been found in the literature and mentions its alloys, in which the staining solutions are based of molybdates, e.g. B. ammonium molybates, with additions of hydrofluoric or silicofluoric acids and zinc salts or ammonium salts were used. Without pre-pickling, this resulted insufficient darkening of good adhesive strength while with known Pre-pickling the color turned out to be darker, but not black. Also owned this known method has the disadvantage that the solutions to the greater extent Some even contained toxins such as oxalates or fluorides in concentrated form, which made it difficult to use.
Gemäß vorliegender Erfindung werden zum Färben von Aluminium und Aluminiumlegierungen Lösungen von Ammoniummolybdaten und Ammoniumchlorid verwendet, die Zusätze von Salzsäure und Kaliumsulfid enthalten. Als Vorbeize kommt eine 5- bis to%ige wäßrige Eisenchloridlösung in Anwendung.According to the present invention, aluminum and aluminum alloys are colored Solutions of ammonium molybdate and ammonium chloride are used, the additions of hydrochloric acid and potassium sulfide. A 5- to% strength aqueous iron chloride solution is used as a pre-pickling agent in use.
Ohne Verwendung von Giftstoffen erhalten die Metallteile nach diesem Verfahren eine bisher mit Färbebädern ohne elektrolytische Oxydation nicht erreichbare tiefschwarze, matte und gut haftende Schicht, die polierbar ist und einen guten Korrosionsschutz dar- stellt.Without the use of toxic substances, the metal parts obtained by this method with a previously dye baths without electrolytic oxidation unreachable deep black, matt and highly adherent layer to polish and good corrosion protection is DAR.
Durch die Zusätze zu den Molybdaten werden auch solche Legierungskomponente des Aluminiums, wie z. B. Kupfer, in gewünschter Weise gefärbt, die sich unter der Wirkung von Ammoniumnwlybdaten allein nicht färben, so daß Sondereinrichtungen für die Durchführung von Ergänzungsverfahren nicht mehr erforderlich werden.Additions to the molybdates also make such alloy components of aluminum, such as B. copper, colored in the desired manner, which is located under the Effect of ammonium nwlyb data alone does not stain, so special facilities for it is no longer necessary to carry out supplementary procedures.
Die matte, tiefschwarze Färbung erwies sich besonders vorteilhaft bei Schrauben- oder Eisenteilen für solche Instrumente usw., welche Lichtstrahlen ausgesetzt sind und bei glänzender Oberfläche auf den Beschauer durch Reflexion störend wirken.The matt, deep black coloration proved to be particularly advantageous in the case of screw or iron parts for such instruments, etc., which rays of light are exposed and with a shiny surface on the viewer through reflection have a disturbing effect.
Das Färbebad besteht aus drei Lösungen, die vor ihrer Mischung miteinander wie folgt angesetzt werden: Lösung I o Gewichtsteile Wasser, dest., i Gewichtsteil Ammoniummolybdat, i Gewichtsteil Ammoniumchlorid; Lösung II io Gewichtsteile Wasser, dest., i Gewichtsteil Salzsäure, chemisch rein; Lösung III io Gewichtsteile Wasser, dest., i Gewichtsteil Kaliumsulfid.The dyebath consists of three solutions that are prepared before they are mixed with one another be made up as follows: Solution 10 parts by weight of distilled water, 1 part by weight Ammonium molybdate, 1 part by weight of ammonium chloride; Solution II io parts by weight of water, dist., 1 part by weight hydrochloric acid, chemically pure; Solution III io parts by weight of water, dist., 1 part by weight of potassium sulfide.
Die vorstehend angegebenen Lösungen werden in derselben Reihenfolge etwa "in dem Verhältnis 813,4:i gemischt.The solutions given above are in the same order about "mixed in the ratio 813.4: i.
Die.Behandlung von Teilen aus Aluminium oder seinen Legierungen zum Zwecke der 'Dunkelfärbung geht in Anwendung des erfindungsgemäßen Verfahrens wie folgt vor sich: Nach dem Entfetten und gründlichen Spülen, letzteres in reinem, fließendem Wasser, wird das Material i Minute lang in einer kochenden Beize einer. Eisenchloridlösung von 5 bis i o% behandelt, danach erneut in reinem Wasser gespült und 3 Minuten in das kochende Färbebad eingetaucht. Nach dem Verlasset des Färbebades wird das Material schließlich nach abermaligem Spülen getrocknet.The treatment of parts made of aluminum or its alloys for The purpose of 'darkening goes into application of the method according to the invention as follows before: after degreasing and thorough rinsing, the latter in pure, running water, the material is in a boiling stain for one minute. Treated iron chloride solution of 5 to 10%, then rinsed again in pure water and immersed in the boiling dye bath for 3 minutes. After leaving the dye bath the material is finally dried after rinsing it again.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEV36120D DE721755C (en) | 1939-08-12 | 1939-08-13 | Process for coloring aluminum and aluminum alloys |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE224430X | 1939-08-12 | ||
DEV36120D DE721755C (en) | 1939-08-12 | 1939-08-13 | Process for coloring aluminum and aluminum alloys |
Publications (1)
Publication Number | Publication Date |
---|---|
DE721755C true DE721755C (en) | 1942-06-18 |
Family
ID=25763814
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEV36120D Expired DE721755C (en) | 1939-08-12 | 1939-08-13 | Process for coloring aluminum and aluminum alloys |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE721755C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1633557A1 (en) * | 2003-06-05 | 2006-03-15 | Metal Coatings International Inc. | Compositions and methods for darkening and imparting corrosion-resistant properties to zinc or other active metals |
-
1939
- 1939-08-13 DE DEV36120D patent/DE721755C/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1633557A1 (en) * | 2003-06-05 | 2006-03-15 | Metal Coatings International Inc. | Compositions and methods for darkening and imparting corrosion-resistant properties to zinc or other active metals |
EP1633557A4 (en) * | 2003-06-05 | 2010-08-25 | Metal Coatings Int Inc | Compositions and methods for darkening and imparting corrosion-resistant properties to zinc or other active metals |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE608270C (en) | Process for the production of oxidic layers on aluminum and its alloys suitable as carriers for light-sensitive substances | |
CH380483A (en) | Process for the production of oxide coatings on aluminum or its alloys | |
DE661266C (en) | Process for increasing the reflectivity of the surfaces of aluminum and aluminum alloys | |
DE626758C (en) | Process to increase the reflection of high-gloss aluminum surfaces | |
DE2239255C3 (en) | Aqueous alkaline solution for applying a corrosion- and heat-resistant, coatable and easily colored oxide coating to a substrate made of aluminum or an aluminum alloy | |
DE3334628A1 (en) | SURFACE TREATMENT FOR ALUMINUM OR ALUMINUM ALLOYS | |
DE721755C (en) | Process for coloring aluminum and aluminum alloys | |
DE745704C (en) | Process for the production of clear and colorless oxide layers on aluminum and its alloys | |
DE2433491C3 (en) | Process for the electrolytic formation of a lizard skin-like surface on aluminum and aluminum alloys | |
DE2805658C3 (en) | Process for the electrolytic coloring of non-anodized aluminum or its non-anodized alloys | |
DE2844406C2 (en) | Recompaction bath and process to prevent deposits during recompaction of anodically oxidized * aluminum surfaces | |
DE480720C (en) | Process for providing metal that consists predominantly or entirely of aluminum with an irregularly speckled coating | |
DE601408C (en) | Process for preventing tarnishing of objects made of nickel, copper and alloys of these metals | |
DE2428635A1 (en) | PROCESS AND COLORING ELECTROLYTE FOR COLORING GRAY OF ANODICALLY OXIDIZED OBJECTS MADE OF ALUMINUM OR ITS ALLOYS | |
DE1496949C3 (en) | Process for the production of self-colored anodic oxide layers on aluminum and aluminum alloys | |
DE677025C (en) | Process to protect shiny or reflective surfaces on aluminum or aluminum alloys | |
DE692124C (en) | Process for the electrolytic oxidation of iron and steel | |
DE1248416B (en) | Bath for anodic oxidation of aluminum | |
DE821898C (en) | Process for anodic treatment of objects made of aluminum or aluminum alloys | |
DE508207C (en) | Process for the production of adhesive coatings on aluminum and its alloys | |
DE553166C (en) | Process for the production of colored, e.g. B. gray or blackish tinted protective layers on the surface of objects made of aluminum alloys | |
DE977472C (en) | Solution for the treatment of zinc surfaces against corrosion | |
DE741337C (en) | Process for the production of crystal clear and colorless oxide layers on aluminum and aluminum alloys | |
DE562110C (en) | Process for the production of colorings or coatings on zinc or cadmium | |
DE185041C (en) |