DE677001C - Process for the production of fluorine-containing layers on light metals and their alloys - Google Patents
Process for the production of fluorine-containing layers on light metals and their alloysInfo
- Publication number
- DE677001C DE677001C DEI56053D DEI0056053D DE677001C DE 677001 C DE677001 C DE 677001C DE I56053 D DEI56053 D DE I56053D DE I0056053 D DEI0056053 D DE I0056053D DE 677001 C DE677001 C DE 677001C
- Authority
- DE
- Germany
- Prior art keywords
- fluorine
- production
- alloys
- containing layers
- light metals
- 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
- 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
- C25D11/30—Anodisation of magnesium 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electrolytic Production Of Metals (AREA)
Description
Verfahren zur Erzeugung fluorhaltiger Schichten auf Leichtmetallen und deren Legierungen Im Hauptpatent 67 i 3 14 ist ein Verfahren zur Erzeugung fluorhaltiger Schichten auf Leichtmetallen und deren Legierungen beschrieben, nach welchem diese mit Alkalipolyfluoriden einschließlich der Ammonpolyfluoride im Schmelzfluß elektrolytisch behandelt werden.Process for the production of fluorine-containing layers on light metals and their alloys In the main patent 67 i 3 14 is a process for the production of fluorine-containing Layers on light metals and their alloys described, according to which these with alkali polyfluorides including ammonium polyfluorides in the melt flow electrolytically be treated.
Es wurde nun gefunden, daß sich für den genannten Zweck auch die Polyfluoride von Aminen und Amiden :sehr gut eignen, und zwar ;sowohl für sich wie auch als Zusätze zu Elektrolyten, die aus Fluoriden bestehen. Die Ers.tarrungspunkte der Polyfluoride von Aminen und Amiden liegen häufig so niedrig, daß sie bei Zimmertemperatur flüssig bleiben, was ihre Handhabung erleichtert. Bei der Verwendung der Elektrolyte zum Erzeugen- fluorhaltiger Schichten wird Fluorwasserstoff verbraucht, so daß sich die Zusammensetzung des Elektrolyten allmählich ändert. Durch Einleiten von .wasserfreiem Fluorwasserstoff in die Schmelze kann diese auf der gewünschten Zusammensetzung gehalten werden.It has now been found that the polyfluorides can also be used for the stated purpose of amines and amides: very suitable, both for themselves and as additives to electrolytes, which consist of fluorides. The initial solidification points of the polyfluorides of amines and amides are often so low that they are liquid at room temperature remain, which makes them easier to use. When using the electrolytes for Generating fluorine-containing layers, hydrogen fluoride is consumed, so that the composition of the electrolyte changes gradually. By introducing. Anhydrous Hydrogen fluoride in the melt can have this on the desired composition being held.
Es sind bereits Verfahren zur elektrolytischen Erzeugung von Fluorschichten auf Leichtmetallen bekannt, bei denen Lösungen von Metallfluoriden in Harnstoff als schmelzflüs sigeElektrolyte Verwendung finden. Demgegenüber zeichnet sich vorliegendes Verfahren dadurch aus, daß die zu verwendenden Polyfluoride schon bei sehr niedrigen Temperaturen, z. B. Zimmertemperatur, flüssig sind und eine Verarmung des Elektrolyten an Fluorwasserstoff erst nach sehr viel längerer Elektrolysiendauer eintritt als bei der Bekannten Verwendung von Monofluoriden. Beispiele i. Acetamidtrifluorid C H3 C O N H3 # 2 H F ist bei Zimmertemperatur flüssig. Ein Blech aus einer Lekchtmetallegierung auf Basis von Magnesium mit überwiegendem Gehalt an letzterem wird in eine Schmelze, die aus gleichen Teilen Ammontrifiuorid und Acetamidtrifluorid NH4F_,HF-@CH3CONH3F#2HF zusammengesetzt ist, als Anode eingehängt..' Stromdichte I bis 3 Amp. pro qdm, Volt I 50,' Temperatur 2o bis 5o°, Zeitdauer i bis 5 Minuten. Die Stromstärke wird z. B. mittels eines-, Regulierwiderstandes auf der gewünschten Höhe gehalten.There are already processes for the electrolytic production of fluorine layers known on light metals in which solutions of metal fluorides in urea are used as molten electrolytes. In contrast, the present one stands out Method characterized in that the polyfluorides to be used even at very low Temperatures, e.g. B. room temperature, are liquid and a depletion of the electrolyte of hydrogen fluoride occurs only after a much longer period of electrolysis than with the known use of monofluorides. Examples i. Acetamide trifluoride C H3 C O N H3 # 2 H F is liquid at room temperature. A sheet made of a light metal alloy based on Magnesium with a predominant content in the latter is made in a melt made up of equal parts of Ammontrifluorid and Acetamidtrifluorid NH4F_, HF- @ CH3CONH3F # 2HF is composed, hung as an anode .. 'Current density I to 3 amps per square meter, volts I 50, temperature 20 to 50 °, duration 1 to 5 minutes. The amperage is z. B. by means of a, regulating resistor on the desired Height held.
2. Ein Magnesiumblech wird in Acetämidtrifluorid C H3 C O N H3 F # 2 H F als Anode eingehängt. Stromdichte 2,5 Amp., Volt 170 bis 19o, Temperatur q.0°, Zeitdauer q. Minuten. Es .entsteht ein weißer überzug.2. A magnesium sheet is hung in acetamide trifluoride C H3 CON H3 F # 2 HF as an anode. Current density 2.5 Amp., Volts 170 to 19o, temperature q.0 °, duration q. Minutes. A white coating appears.
3. Diäthylamintrifluorid (C2H5)2N132F#2HF (flüssig bei gewöhnlicher Temperatur) ist bei Zimmertemperatur flüssig. Ein Blech aus einer Leichtmetallegierung auf Basis von Magnesium mit überwiegendem Gehalt an letzterem wird als Anode eingehängt. Stromdichte 0,7 Amp. pro qdm, Volt Iq.o, Temperatur 6o bis 70°, Zeitdauer io Minuten. Es entsteht ein dünner, wenig sichtbarer Überzug, der gut gegen Korrosion schützt.3. Diethylamine trifluoride (C2H5) 2N132F # 2HF (liquid at ordinary temperature) is liquid at room temperature. A sheet made of a light metal alloy based on magnesium with a predominant content of the latter is suspended as an anode. Current density 0.7 Amp. Per qdm, volt Iq.o, temperature 60 to 70 °, duration 10 minutes. The result is a thin, invisible coating that protects well against corrosion.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEI56053D DE677001C (en) | 1935-07-27 | 1936-10-01 | Process for the production of fluorine-containing layers on light metals and their alloys |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE463024X | 1935-07-27 | ||
| DEI56053D DE677001C (en) | 1935-07-27 | 1936-10-01 | Process for the production of fluorine-containing layers on light metals and their alloys |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE677001C true DE677001C (en) | 1939-06-16 |
Family
ID=25943994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEI56053D Expired DE677001C (en) | 1935-07-27 | 1936-10-01 | Process for the production of fluorine-containing layers on light metals and their alloys |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE677001C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3417004A (en) * | 1966-03-24 | 1968-12-17 | Bell Telephone Labor Inc | Production of aluminum, magnesium, and nickel fluoride films by anodization |
| FR2322212A1 (en) * | 1975-08-25 | 1977-03-25 | Aidlin Joseph | PERFECTED BATH FOR CHEMICAL TREATMENT OF A METAL SURFACE |
-
1936
- 1936-10-01 DE DEI56053D patent/DE677001C/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3417004A (en) * | 1966-03-24 | 1968-12-17 | Bell Telephone Labor Inc | Production of aluminum, magnesium, and nickel fluoride films by anodization |
| FR2322212A1 (en) * | 1975-08-25 | 1977-03-25 | Aidlin Joseph | PERFECTED BATH FOR CHEMICAL TREATMENT OF A METAL SURFACE |
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