DE1006689B - Electrolyte and process for the galvanic deposition of aluminum on iron - Google Patents
Electrolyte and process for the galvanic deposition of aluminum on ironInfo
- Publication number
- DE1006689B DE1006689B DEU3400A DEU0003400A DE1006689B DE 1006689 B DE1006689 B DE 1006689B DE U3400 A DEU3400 A DE U3400A DE U0003400 A DEU0003400 A DE U0003400A DE 1006689 B DE1006689 B DE 1006689B
- Authority
- DE
- Germany
- Prior art keywords
- electrolyte
- aluminum
- chloride
- galvanic deposition
- alkali
- 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.)
- Pending
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
- C25D3/00—Electroplating: Baths therefor
- C25D3/66—Electroplating: Baths therefor from melts
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)
- Electroplating Methods And Accessories (AREA)
- Chemical Treatment Of Metals (AREA)
- Coating With Molten Metal (AREA)
Description
DEUTSCHESGERMAN
Die Erfindung bezieht sich auf einen Elektrolyt in Form einer Metallsalzschmelze und ein Verfahren zum galvanischen Abscheiden von Aluminium.The invention relates to an electrolyte in the form of a molten metal salt and a method for the galvanic deposition of aluminum.
Es ist bekannt, daß Aluminiumüberzüge elektrolytisch auf Eisenmetallen mittels wasserfreier geschmolzener Metallsalzelektrolyten, die Aluminiumchlorid und Natriumchlorid und gelegentlich auch ein weiteres Metall, wie Blei, enthalten, abgeschieden werden können. Anoden aus Aluminium von hohem Reinheitsgrad werden in den Elektrolyt eingetaucht, während das Eisenmetall die Kathode darin bildet. Die bisher nach diesen Verfahren erzielten überzüge haben sich nicht in jeder Hinsicht als einwandfrei erwiesen. Um eine glatte Oberfläche auf dem zu galvanisierenden Gegenstand zu erzeugen, wurde es für erforderlich gehalten, Blei in den Elektrolyt aufzunehmen; jedoch ist Blei giftig, und sein Vorhandensein schließt die spätere Verwendung des Produktes für Nahrungsmittelbehälter aus. Ältere Verfahren wurden nur beim Behältergalvanisieren angewendet, sie brachten keinen glänzenden Überzug hervor; außerdem erfordern sie eine unwirtschaftlich niedrige Stromdichte von nur etwa 160 Amp./m2.It is known that aluminum coatings can be electrolytically deposited on ferrous metals by means of anhydrous molten metal salt electrolytes containing aluminum chloride and sodium chloride and occasionally another metal such as lead. High purity aluminum anodes are immersed in the electrolyte while the ferrous metal forms the cathode therein. The coatings obtained so far by this process have not proven to be flawless in every respect. In order to produce a smooth surface on the object to be electroplated, it has been found necessary to include lead in the electrolyte; however, lead is poisonous and its presence precludes its later use in food containers. Older methods were only used for plating containers; they did not produce a glossy coating; in addition, they require an uneconomically low current density of only about 160 amps / m 2 .
Die Erfindung richtet sich nun auf die Verbesserung des Elektrolyts und des Verfahrens zur Behebung der obenerwähnten Nachteile, wodurch hellglänzende, glatte Überzüge ohne Mitwirkung giftiger Metalle erzeugt werden und wobei mit höheren Stromdichten und auf wanderndem Stahlband gearbeitet werden kann.The invention is now directed to improving the electrolyte and the method for eliminating the the disadvantages mentioned above, resulting in bright, smooth coatings without the involvement of toxic metals and with higher current densities and on moving steel strip can.
Ein weiteres Ziel der Erfindung ist die Schaffung eines verbesserten Elektrolyts mit Einschluß eines Alkalimetallfluoride, wodurch nach den gemachten Feststellungen die Nachteile der bisher bekannten Elektrolyte aufgehoben werden.Another object of the invention is to provide an improved electrolyte including one Alkali metal fluorides, which, according to the findings made, the disadvantages of the previously known Electrolytes are canceled.
Die Elektrolyte der vorliegenden Erfindung bestehen in Gewichtsprozenten ausThe electrolytes of the present invention are made up in percent by weight
Aluminiumchlorid 60,0 bis 90,0%Aluminum chloride 60.0 to 90.0%
Alkalimetallchlorid 9,5 „ 39,5%Alkali metal chloride 9.5 "39.5%
Alkalimetallfluorid 0,5 „ 7,0%Alkali metal fluoride 0.5 "7.0%
Die vorteilhaftesten nutzbaren Bereiche sind jedoch etwas enger und werden in folgenden Gewichtsprozenten ausgedrückt:However, the most advantageous usable ranges are somewhat narrower and are in the following weight percentages expressed:
Aluminiumchlorid 65,0 bis 85,0%Aluminum chloride 65.0 to 85.0%
Alkalimetallchlorid 14.5 „ 34,5%Alkali metal chloride 14.5 "34.5%
Alkalimetallfluorid 0,5 „ 4,0%Alkali metal fluoride 0.5 "4.0%
Gemäß dem Verfahren nach der Erfindung werden Anoden aus Aluminiummetall von hohem Reinheitsgrad und eine Kathode aus Eisenmetall in einen geschmolzenen Elektrolyt von der obenerwähnten Zusammensetzung eingetaucht. Die Temperatur des Elektrolyts wird zwischen 200 und 4800C, vorzugs-Elektrolyt According to the method of the invention, anodes made of aluminum metal of high purity and a cathode made of ferrous metal are immersed in a molten electrolyte of the above-mentioned composition. The temperature of the electrolyte is between 200 and 480 0 C, preferably electrolyte
und Verfahren zur galvanischen
Abscheidung von Aluminium auf Eisenand method of galvanic
Deposition of aluminum on iron
Anmelder:Applicant:
ίο United States Steel Corporation,ίο United States Steel Corporation,
Pittsburgh, Pa. (V. St. A.)Pittsburgh, Pa. (V. St. A.)
Vertreter: Dr.-Ing. E. Maier, Patentanwalt,
*5 Schramberg (Württ), Schütachstr. 59Representative: Dr.-Ing. E. Maier, patent attorney,
* 5 Schramberg (Württ), Schütachstr. 59
Beanspruchte Priorität:
V. St. v. Amerika vom 11. Januar 1955Claimed priority:
V. St. v. America January 11, 1955
Charles James Owen, Pittsburgh, Pa. (V. St. Α.),
ist als Erfinder genannt wordenCharles James Owen, Pittsburgh, Pa. (V. St. Α.),
has been named as the inventor
weise jedoch zwischen 230 und 34O0C gehalten. Ein Gleichstrom mit einer Dichte von 806 bis 26 900 Amp./m2, vorzugsweise jedoch 2150 bis 5370 Amp./m2, wird zwischen Anode und Kathode angelegt. Das Eisenmetall kann die Form eines fortlaufenden Stahlbandes haben, in welchem Fall die maschinelle Einrichtung derjenigen beim Feuerverzinnen entspricht; d.h. das Band wandert senkrecht zwischen beiderseits senkrecht angeordneten Anoden. Die Bandgeschwindigkeit kann zwischen 120 und 300 m/min betragen; mit umlaufenden Kathoden durchgeführte Versuche zeigten, daß Vorschubgeschwindigkeiten von 15 bis 750 m/min möglich sind. Nachstehend werden spezifische Beispiele von Elektrolyten gemäß der Erfindung aufgeführt, wobei die Werte Gewichtsprozente ausdrücken:However, as held between 230 and 34O 0 C. A direct current with a density of 806 to 26,900 amps / m 2 , but preferably 2150 to 5370 amps / m 2 , is applied between the anode and cathode. The ferrous metal may be in the form of a continuous steel strip, in which case the machinery will be the same as for hot-dip tinning; ie the strip moves vertically between anodes arranged vertically on both sides. The belt speed can be between 120 and 300 m / min; Tests carried out with rotating cathodes showed that feed speeds of 15 to 750 m / min are possible. Specific examples of electrolytes according to the invention are given below, the values expressing percentages by weight:
Aluminiumchlorid 80,0%Aluminum chloride 80.0%
Natriumchlorid 18,5%Sodium chloride 18.5%
Natriumfluorid 1,5%Sodium fluoride 1.5%
Aluminiumchlorid 80,0%Aluminum chloride 80.0%
Natriumchlorid 18,0%Sodium chloride 18.0%
Kaliumfluorid 2,0%Potassium fluoride 2.0%
609 869/359609 869/359
Aluminiumchlorid 75,0%Aluminum chloride 75.0%
Kaliumchlorid 23,5%Potassium chloride 23.5%
Natriumfluorid 1,5 %Sodium fluoride 1.5%
Aluminiumchlorid 75,0%Aluminum chloride 75.0%
Kaliumchlorid 23,0%Potassium chloride 23.0%
Kaliumfluorid 2,0%Potassium fluoride 2.0%
IOIO
Bei jedem Beispiel kann der Elektrolyt auf einer Temperatur von etwa 2600C gehalten werden. Es können glatte, helle Überzüge auf Stahlband mit einer Oberflächengeschwindigkeit von etwa 150 m/min und einer Stromdichte von etwa 2690 Anip./tn2 niedergeschlagen werden.In each example, the electrolyte can be maintained at a temperature of about 260 0 C. Smooth, light-colored coatings can be deposited on steel strip at a surface speed of about 150 m / min and a current density of about 2690 anip./tn 2 .
Claims (4)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US775055XA | 1955-01-11 | 1955-01-11 | |
US525391A US2762764A (en) | 1955-01-11 | 1955-07-29 | Method of electroplating aluminum and electrolyte therefor |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1006689B true DE1006689B (en) | 1957-04-18 |
Family
ID=26759348
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEU3400A Pending DE1006689B (en) | 1955-01-11 | 1955-06-22 | Electrolyte and process for the galvanic deposition of aluminum on iron |
DEU4007A Pending DE1038370B (en) | 1955-01-11 | 1956-07-06 | Use of baths and application of the process for galvanic deposition of aluminum coatings |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEU4007A Pending DE1038370B (en) | 1955-01-11 | 1956-07-06 | Use of baths and application of the process for galvanic deposition of aluminum coatings |
Country Status (5)
Country | Link |
---|---|
US (1) | US2762764A (en) |
BE (2) | BE539320A (en) |
DE (2) | DE1006689B (en) |
FR (2) | FR1126358A (en) |
GB (2) | GB775055A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1197178B (en) * | 1958-10-24 | 1965-07-22 | Siemens Ag | Method for producing a pn junction in a semiconductor body |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3268422A (en) * | 1960-06-09 | 1966-08-23 | Nat Steel Corp | Electroplating bath containing aluminum and manganese-bearing materials and method of forming aluminummanganese alloy coatings on metallic bases |
USRE26223E (en) * | 1960-06-09 | 1967-06-20 | Base materials coated with an alloy of aujmtnum and manganese | |
US3236751A (en) * | 1961-05-19 | 1966-02-22 | Matsushita Electric Ind Co Ltd | Aluminum deposition from an anhydrous fusible salt electrolyte |
US3259557A (en) * | 1962-03-02 | 1966-07-05 | Nat Steel Corp | Method of electrodepositing aluminum |
US3267008A (en) * | 1962-10-04 | 1966-08-16 | Nat Steel Corp | Method of recovering aluminum halide from metal strip electrodeposited with an aluminum-containing coating from a fused salt bath |
US3214820A (en) * | 1963-02-08 | 1965-11-02 | Nat Steel Corp | Steel foil and manufacture |
CN102941700A (en) * | 2012-11-14 | 2013-02-27 | 无锡市光源不锈钢制品有限公司 | Aluminum-plated stainless steel band |
US11136686B2 (en) * | 2015-07-16 | 2021-10-05 | Battelle Energy Alliance, Llc. | Methods and systems for aluminum electroplating |
RU2658550C1 (en) * | 2016-12-28 | 2018-06-21 | Федеральное государственное бюджетное учреждение науки Институт высокотемпературной электрохимии Уральского отделения Российской Академии наук | Method for obtaining aluminide diffusion coating on low-carbon steel |
US11746434B2 (en) | 2021-07-21 | 2023-09-05 | Battelle Energy Alliance, Llc | Methods of forming a metal coated article |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE829504C (en) * | 1948-11-19 | 1952-07-10 | Hans Grothe Dr Ing | Process for the electrowinning of aluminum |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1488553A (en) * | 1923-01-26 | 1924-04-01 | Willis G Waldo | Process of coating sheet steel with aluminum |
GB659927A (en) * | 1948-04-05 | 1951-10-31 | American Electro Metal Corp | Improvements relating to the coating electrolytically of metal articles |
-
0
- BE BE546819D patent/BE546819A/xx unknown
- BE BE539320D patent/BE539320A/xx unknown
-
1955
- 1955-05-31 GB GB15612/55A patent/GB775055A/en not_active Expired
- 1955-06-22 FR FR1126358D patent/FR1126358A/en not_active Expired
- 1955-06-22 DE DEU3400A patent/DE1006689B/en active Pending
- 1955-07-29 US US525391A patent/US2762764A/en not_active Expired - Lifetime
-
1956
- 1956-03-28 GB GB9740/56A patent/GB792635A/en not_active Expired
- 1956-06-07 FR FR69935D patent/FR69935E/en not_active Expired
- 1956-07-06 DE DEU4007A patent/DE1038370B/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE829504C (en) * | 1948-11-19 | 1952-07-10 | Hans Grothe Dr Ing | Process for the electrowinning of aluminum |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1197178B (en) * | 1958-10-24 | 1965-07-22 | Siemens Ag | Method for producing a pn junction in a semiconductor body |
Also Published As
Publication number | Publication date |
---|---|
US2762764A (en) | 1956-09-11 |
BE539320A (en) | |
FR69935E (en) | 1959-01-09 |
BE546819A (en) | |
FR1126358A (en) | 1956-11-21 |
DE1038370B (en) | 1958-09-04 |
GB775055A (en) | 1957-05-15 |
GB792635A (en) | 1958-04-02 |
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