US2762764A - Method of electroplating aluminum and electrolyte therefor - Google Patents

Method of electroplating aluminum and electrolyte therefor Download PDF

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Publication number
US2762764A
US2762764A US525391A US52539155A US2762764A US 2762764 A US2762764 A US 2762764A US 525391 A US525391 A US 525391A US 52539155 A US52539155 A US 52539155A US 2762764 A US2762764 A US 2762764A
Authority
US
United States
Prior art keywords
electrolyte
aluminum
chloride
alkali metal
fluoride
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 - Lifetime
Application number
US525391A
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English (en)
Inventor
Charles J Owen
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.)
United States Steel Corp
Original Assignee
United States Steel Corp
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
Priority to BE539320D priority Critical patent/BE539320A/xx
Priority to BE546819D priority patent/BE546819A/xx
Priority to GB15612/55A priority patent/GB775055A/en
Priority to DEU3400A priority patent/DE1006689B/de
Priority to FR1126358D priority patent/FR1126358A/fr
Application filed by United States Steel Corp filed Critical United States Steel Corp
Priority to US525391A priority patent/US2762764A/en
Priority to GB9740/56A priority patent/GB792635A/en
Priority to FR69935D priority patent/FR69935E/fr
Priority to DEU4007A priority patent/DE1038370B/de
Application granted granted Critical
Publication of US2762764A publication Critical patent/US2762764A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • This invention relates to an improved molten salt electrolyte and method for electrodeposition of aluminum.
  • An object of my invention is to provide an improved electrolyte and method which overcome the foregoing disadvantages, that is, which furnish bright smooth coatings without the presence of toxic metals and are operable with higher current densities and on moving continuous lengths of base metal.
  • a further object is to provide an improved electrolyte incorporating an alkali metal fluoride, which I have found overcomes the disadvantages of previous electrolytes.
  • Electrolytes of my invention consist by weight of the following:
  • anodes of high purity aluminum metal and a base metal cathode are immersed in a molten electrolyte of the foregoing composition.
  • suitable base metals are steel or other ferrous metals, copper and brass.
  • the temperature of the electrolyte is maintained between 400 and 900 F., but preferably between 450 and 650 F.
  • the base metal can be in the form of continuous steel strip, in which event the physical arrangement is similar to that used for electrolytic tinning; that is, the strip travels vertically between vertically disposed anodes on each side.
  • the strip speed 2,762,764 Patented Sept. 1 1, 1956
  • Example I Per cent Aluminum chloride Sodium chloride 18.5 Sodium fluoride A 1.5
  • Example II Per cent Aluminum chloride u 80
  • Example III Per cent Aluminum chloride 75 Potassium chloride 23.5
  • Example IV Per cent Aluminum chloride 75 Potassium chloride 23 Potassium fluoride 2 in each example the electrolyte can be maintained at a temperature of about 550 F. Smooth bright coatings can be deposited on continuous lengths of such base metals as steel strip or copper Wire having a surface speed of about 500 feet per minute with a current density of about 250 amperes per square foot.
  • An anhydrous salt electrolyte for electrodeposition of aluminum said electrolyte being molten when heated to at least 400 F. and consisting by weight of the following:
  • An anhydrous salt electrolyte for electrodeposition of aluminum said electrolyte being molten when heated to at least 400 F. and consisting by weight of the following:
  • a method of electrolytically depositing aluminum coatings on a base metal of the group consisting of ferrous metals, copper and brass comprising immersing an aluminum anode and a base metal cathode in an anhydrous molten salt electrolyte consisting by weight of the following:
  • I Per cent Aluminum chloride 65 to 85 Alkali metal chloride 14.5 to 34.5 Alkali metal fluoride 0.5 to 4 while maintaining the electrolyte temperature at 450 to 650 F. and the current density at 200 to 500 amperes per square foot.
  • chloride 4 and fluoride salts are of an alkali metal of the group consisting of sodium and potassium.
  • a method of electrolytically depositing aluminum on continuous steel strip comprising passing the strip at speeds of 400 to 1000 feet per minute through an anhydrous molten salt electrolyte containing anodes of aluminum metal, said electrolyte consisting by weight of the following:

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)
  • Coating With Molten Metal (AREA)
  • Chemical Treatment Of Metals (AREA)
US525391A 1955-01-11 1955-07-29 Method of electroplating aluminum and electrolyte therefor Expired - Lifetime US2762764A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
BE546819D BE546819A (de) 1955-01-11
BE539320D BE539320A (de) 1955-01-11
GB15612/55A GB775055A (en) 1955-01-11 1955-05-31 Method of electroplating aluminum and electrolyte therefor
FR1126358D FR1126358A (fr) 1955-01-11 1955-06-22 Procédé de dépôt électrolytique de l'aluminium et électrolyte destiné à ce procédé
DEU3400A DE1006689B (de) 1955-01-11 1955-06-22 Elektrolyt und Verfahren zur galvanischen Abscheidung von Aluminium auf Eisen
US525391A US2762764A (en) 1955-01-11 1955-07-29 Method of electroplating aluminum and electrolyte therefor
GB9740/56A GB792635A (en) 1955-01-11 1956-03-28 Method of electroplating with aluminium and electrolyte therefor
FR69935D FR69935E (fr) 1955-01-11 1956-06-07 Procédé de dépôt électrolytique de l'aluminium et électrolyte destiné à ce procédé
DEU4007A DE1038370B (de) 1955-01-11 1956-07-06 Verwendung von Baedern und Anwendung des Verfahrens zur galvanischen Abscheidung vonAluminiumueberzuegen

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
US2762764A true US2762764A (en) 1956-09-11

Family

ID=26759348

Family Applications (1)

Application Number Title Priority Date Filing Date
US525391A Expired - Lifetime US2762764A (en) 1955-01-11 1955-07-29 Method of electroplating aluminum and electrolyte therefor

Country Status (5)

Country Link
US (1) US2762764A (de)
BE (2) BE546819A (de)
DE (2) DE1006689B (de)
FR (2) FR1126358A (de)
GB (2) GB775055A (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3167403A (en) * 1960-06-09 1965-01-26 Nat Steel Corp Base materials coated with an alloy of aluminum and manganese
US3214820A (en) * 1963-02-08 1965-11-02 Nat Steel Corp Steel foil and manufacture
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
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
US20180209057A1 (en) * 2015-07-16 2018-07-26 Battelle Energy Alliance, Llc Methods and systems for aluminum electroplating
US11746434B2 (en) 2021-07-21 2023-09-05 Battelle Energy Alliance, Llc Methods of forming a metal coated article

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL244622A (de) * 1958-10-24
CN102941700A (zh) * 2012-11-14 2013-02-27 无锡市光源不锈钢制品有限公司 覆铝不锈钢带
RU2658550C1 (ru) * 2016-12-28 2018-06-21 Федеральное государственное бюджетное учреждение науки Институт высокотемпературной электрохимии Уральского отделения Российской Академии наук Способ получения диффузионного алюминидного покрытия на низкоуглеродистой стали

Citations (2)

* Cited by examiner, † Cited by third party
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

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE829504C (de) * 1948-11-19 1952-07-10 Hans Grothe Dr Ing Verfahren zur elektrolytischen Gewinnung von Aluminium

Patent Citations (2)

* Cited by examiner, † Cited by third party
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

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3167403A (en) * 1960-06-09 1965-01-26 Nat Steel Corp Base materials coated with an alloy of aluminum and manganese
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
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
US20180209057A1 (en) * 2015-07-16 2018-07-26 Battelle Energy Alliance, Llc Methods and systems for aluminum electroplating
US11136686B2 (en) * 2015-07-16 2021-10-05 Battelle Energy Alliance, Llc. Methods and systems for aluminum electroplating
US11746434B2 (en) 2021-07-21 2023-09-05 Battelle Energy Alliance, Llc Methods of forming a metal coated article

Also Published As

Publication number Publication date
DE1006689B (de) 1957-04-18
DE1038370B (de) 1958-09-04
GB792635A (en) 1958-04-02
BE546819A (de)
GB775055A (en) 1957-05-15
FR1126358A (fr) 1956-11-21
FR69935E (fr) 1959-01-09
BE539320A (de)

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