EP0094577A2 - Cathode pour l'électrolyse de chlorures alcalins et procédé pour sa fabrication - Google Patents

Cathode pour l'électrolyse de chlorures alcalins et procédé pour sa fabrication Download PDF

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Publication number
EP0094577A2
EP0094577A2 EP83104513A EP83104513A EP0094577A2 EP 0094577 A2 EP0094577 A2 EP 0094577A2 EP 83104513 A EP83104513 A EP 83104513A EP 83104513 A EP83104513 A EP 83104513A EP 0094577 A2 EP0094577 A2 EP 0094577A2
Authority
EP
European Patent Office
Prior art keywords
nickel
layer
cathode
aluminum
powder
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.)
Granted
Application number
EP83104513A
Other languages
German (de)
English (en)
Other versions
EP0094577A3 (en
EP0094577B1 (fr
Inventor
Peter Fabian
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.)
De Nora Deutschland GmbH
Original Assignee
Heraeus Elektroden GmbH
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 Heraeus Elektroden GmbH filed Critical Heraeus Elektroden GmbH
Priority to AT83104513T priority Critical patent/ATE27188T1/de
Publication of EP0094577A2 publication Critical patent/EP0094577A2/fr
Publication of EP0094577A3 publication Critical patent/EP0094577A3/de
Application granted granted Critical
Publication of EP0094577B1 publication Critical patent/EP0094577B1/fr
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
    • C25B11/04—Electrodes; Manufacture thereof not otherwise provided for characterised by the material
    • C25B11/042—Electrodes formed of a single material
    • C25B11/046—Alloys
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
    • C25B11/04—Electrodes; Manufacture thereof not otherwise provided for characterised by the material
    • C25B11/051—Electrodes formed of electrocatalysts on a substrate or carrier
    • C25B11/073—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalyst material
    • C25B11/091—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalyst material consisting of at least one catalytic element and at least one catalytic compound; consisting of two or more catalytic elements or catalytic compounds

Definitions

  • the invention relates to a cathode for chlor-alkali electrolysis, in particular according to the diaphragm or membrane method, which has an activation layer made of Raney nickel on a support made of soft iron or steel.
  • the invention further relates to a method for producing such cathodes.
  • Cathodes of the type described in the introduction are commercially available.
  • the Raney nickel activation layer is rolled on.
  • the electrolyte liquor causes corrosion damage, which manifests itself, for example, in the formation of bubbles in the nickel layer as well as a partial solution of the nickel layer from the support and leads to flaking off of the nickel layer .
  • Rolling the Raney nickel layer requires flat supports, which can only be deformed into the desired cathode shape after coating, which also means that flaking of the coating on curved cathode regions cannot be ruled out.
  • the invention has for its object to provide a cathode for chlor-alkali electrolysis, which has a high corrosion resistance to the electrolyte solution, very low hydrogen deposition potentials and also a high adhesive strength of the activation layer on the carrier, even when the carrier is deformed.
  • the activation layer consists of a 30 to 60 ⁇ m thick and dense nickel underlayer which is connected to the support and on which a porous Raney nickel cover layer with a rougher surface Surface and a layer thickness of 20 to 60 microns is attached.
  • a method for the production of a cathode for chlor-alkali electrolysis, in particular according to the diaphragm or membrane method, with an activation layer of Raney nickel applied to a carrier made of soft iron or steel, a method has proven particularly useful, which is characterized in that the cleaned carrier surface first a 30 to 60 ⁇ m thick, dense nickel underlayer is sprayed on using the plasma jet process, then a 20 to 60 ⁇ m thick top layer is then sprayed on using the plasma jet process is sprayed on from a nickel-aluminum mixture with an aluminum content of 10 to 50%, the rest of nickel, from which the aluminum is then leached. 1N NaOH is preferably used to leach the aluminum.
  • the method is particularly suitable for supports which are deformed into the desired cathode shape before being coated with the underlayer and the top layer.
  • a nickel powder with a grain size in the range from 10 to 60 ⁇ m is preferably used for spraying on the underlayer.
  • the use of a powder mixture of 50 parts of nickel and 50 parts of aluminum with a grain size in the range from 10 to 60 ⁇ m has proven useful for spraying on the top layer.
  • the cathodes according to the invention showed only extraordinarily little corrosion damage when stored for 3 weeks in a current-free storage in a diaphragm cell solution with the composition 150 g / 1 NaOH + 130 g / 1 NaCl, while cathodes according to the prior art sometimes show strong detachment of the nickel layer, pitting and blistering through which the nickel layer partially flaked off.
  • the cathodes showed similar results under operating conditions.
  • the method according to the invention is suitable not only for the coating of planar supports, but in particular also for those supports which have already been deformed into the desired cathode shape before coating, because There are no difficulties due to the spraying on of both the bottom and the top layer by means of the plasma spraying method, since the plasma spraying jet also reliably reaches curved or bent surface parts of the carrier.
  • FIG. 1 shows a section of an exemplary embodiment of a cathode according to the invention, FIG. 1 a showing a view and FIG. 1 b a vertical section along the plane A-B.
  • the reference number 1 denotes the cathode in the figure. It consists, as can be seen from FIG. 1b, of a carrier 12 made of soft iron or steel, the lower layer 3 made of nickel layer sprayed on by means of the plasma jet method and the porous covering layer 4 made of Raney nickel produced thereon by the method according to the invention. It is clearly evident from the figures that the cover layer has a rough surface.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electrodes For Compound Or Non-Metal Manufacture (AREA)
  • Electrolytic Production Of Metals (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
EP83104513A 1982-05-15 1983-05-07 Cathode pour l'électrolyse de chlorures alcalins et procédé pour sa fabrication Expired EP0094577B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83104513T ATE27188T1 (de) 1982-05-15 1983-05-07 Kathode fuer die chloralkali-elektrolyse und verfahren zu deren herstellung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3218429A DE3218429C2 (de) 1982-05-15 1982-05-15 Verfahren zur Herstellung einer Kathode für die Chlor-Alkali-Elektrolyse
DE3218429 1982-05-15

Publications (3)

Publication Number Publication Date
EP0094577A2 true EP0094577A2 (fr) 1983-11-23
EP0094577A3 EP0094577A3 (en) 1984-03-07
EP0094577B1 EP0094577B1 (fr) 1987-05-13

Family

ID=6163756

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83104513A Expired EP0094577B1 (fr) 1982-05-15 1983-05-07 Cathode pour l'électrolyse de chlorures alcalins et procédé pour sa fabrication

Country Status (5)

Country Link
EP (1) EP0094577B1 (fr)
JP (1) JPS5941485A (fr)
KR (1) KR840004795A (fr)
AT (1) ATE27188T1 (fr)
DE (2) DE3218429C2 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4595468A (en) * 1984-07-19 1986-06-17 Eltech Systems Corporation Cathode for electrolysis cell
EP0762517A3 (fr) * 1995-09-11 1999-10-20 Texas Instruments Incorporated Améliorations relatives aux composants semi-conducteurs
EP1702681A2 (fr) 2005-03-08 2006-09-20 H.C. Starck GmbH Corps catalytique mis en forme, puls particulièrement utilisable en tant que catalyseur d'hydrogénation
KR100772326B1 (ko) * 2000-02-15 2007-10-31 오투 마이크로, 인코포레이티드 휴대용 전자 장치용 오디오 컨트롤러

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2644617B2 (ja) * 1990-08-24 1997-08-25 日本碍子株式会社 静圧気体軸受け及びその製造法
RU2110619C1 (ru) * 1996-09-09 1998-05-10 Закрытое акционерное общество "Техно-ТМ" Электрод для электрохимических процессов и способ его изготовления
DE102024135929B3 (de) 2024-12-03 2026-02-26 Ks Gleitlager Gmbh Elektrode für die alkalische Wasserelektrolyse, Verwendung einer solchen Elektrode, Elektrolysezelle umfassend eine solche Elektrode sowie Verfahren zur Herstellung einer solchen Elektrode

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1233834B (de) * 1958-03-05 1967-02-09 Siemens Ag Elektrode fuer Elektrolyseure und Brennstoff-elemente mit oberflaechlicher Doppelskelett-Katalysator-Struktur
US4049841A (en) * 1975-09-08 1977-09-20 Basf Wyandotte Corporation Sprayed cathodes
US4024044A (en) * 1975-09-15 1977-05-17 Diamond Shamrock Corporation Electrolysis cathodes bearing a melt-sprayed and leached nickel or cobalt coating
US4116804A (en) * 1976-11-17 1978-09-26 E. I. Du Pont De Nemours And Company Catalytically active porous nickel electrodes
JPS54112785A (en) * 1978-02-24 1979-09-03 Asahi Glass Co Ltd Electrode and manufacture thereof
DE2914094C2 (de) * 1979-04-07 1983-02-10 Kernforschungsanlage Jülich GmbH, 5170 Jülich Poröse Nickelelektrode für alkalische Elektrolysen, Verfahren zur Herstellung derselben und deren Verwendung
EP0067975B1 (fr) * 1981-06-01 1987-08-19 Asahi Glass Company Ltd. Procédé pour l'électrolyse de l'eau

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4595468A (en) * 1984-07-19 1986-06-17 Eltech Systems Corporation Cathode for electrolysis cell
EP0762517A3 (fr) * 1995-09-11 1999-10-20 Texas Instruments Incorporated Améliorations relatives aux composants semi-conducteurs
KR100772326B1 (ko) * 2000-02-15 2007-10-31 오투 마이크로, 인코포레이티드 휴대용 전자 장치용 오디오 컨트롤러
EP1702681A2 (fr) 2005-03-08 2006-09-20 H.C. Starck GmbH Corps catalytique mis en forme, puls particulièrement utilisable en tant que catalyseur d'hydrogénation
EP1702681A3 (fr) * 2005-03-08 2006-10-25 H.C. Starck GmbH Corps catalytique mis en forme, puls particulièrement utilisable en tant que catalyseur d'hydrogénation

Also Published As

Publication number Publication date
JPS5941485A (ja) 1984-03-07
DE3218429A1 (de) 1983-12-01
ATE27188T1 (de) 1987-05-15
EP0094577A3 (en) 1984-03-07
KR840004795A (ko) 1984-10-24
EP0094577B1 (fr) 1987-05-13
DE3371544D1 (en) 1987-06-19
DE3218429C2 (de) 1987-03-19

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