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SU490279A3 - Method of removing active coating containing platinum group metal oxide from titanium electrode substrate - Google Patents

Method of removing active coating containing platinum group metal oxide from titanium electrode substrate

Info

Publication number
SU490279A3
SU490279A3 SU1673266A SU1673266A SU490279A3 SU 490279 A3 SU490279 A3 SU 490279A3 SU 1673266 A SU1673266 A SU 1673266A SU 1673266 A SU1673266 A SU 1673266A SU 490279 A3 SU490279 A3 SU 490279A3
Authority
SU
USSR - Soviet Union
Prior art keywords
metal oxide
coating containing
active coating
group metal
electrode substrate
Prior art date
Application number
SU1673266A
Other languages
Russian (ru)
Inventor
Вильям Джеймс Памфрэй Николас
Грахам Мосс Кэйс
Original Assignee
Империал Кемикал Индастриз Лимитед (Фирма)
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 Империал Кемикал Индастриз Лимитед (Фирма) filed Critical Империал Кемикал Индастриз Лимитед (Фирма)
Application granted granted Critical
Publication of SU490279A3 publication Critical patent/SU490279A3/en

Links

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
    • 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
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/28—Cleaning or pickling metallic material with solutions or molten salts with molten salts
    • C23G1/32—Heavy metals
    • 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
    • C25B15/00—Operating or servicing cells

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Electrodes For Compound Or Non-Metal Manufacture (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Description

ТаблицаTable

годна дл  повторного нанесени  а1стивной массы.suitable for repeated application of the mass.

Прнмер 4. Полосу титана, покрытую смесью двуокиси рутени , двуокиси олова и окислов сурьмы (приблизительный состав нокрыти : 5 вес. % RuO2, 85 вес. % SnOj и 10 вес. % окислов сурьмы в расчете на Sb204), обрабатывают аналогично тому, как описано в примере 3. Обработка обеспечивает полное удаление покрыти . Поверхность титана пригодна дл  повторного нанесени  активной .массы.Prnmer 4. A strip of titanium coated with a mixture of ruthenium dioxide, tin dioxide and antimony oxides (approximate composition: 5 wt.% RuO2, 85 wt.% SnOj and 10 wt.% Antimony oxides per Sb204) is treated in the same way as described in example 3. Treatment provides complete removal of the coating. The surface of titanium is suitable for re-deposition of active mass.

Т а б л и ц U 2T a b l and c u 2

Пример 2. Два анода электролизера с ртутным катодом, выполненные в виде решетки из параллельных титановых нластин, приваренных с одного конца к поперечным титановым элементам, и имеющие рабочую поверхность 0,1 м, обрабатывают в расплаве гидроокиси натри , содержащем гидрид натри . Активное покрытие электродов имеет следующий состав: 40 вес. % Ru и 60 вес. % TiO2. После обработки электродов в расплаве их охлаждают в холодной воде.Example 2. Two anodes of a mercury cathode electrolyzer, made in the form of a lattice of parallel titanium nlastin, welded at one end to the transverse titanium elements, and having a working surface of 0.1 m, are treated in a sodium hydroxide melt containing sodium hydride. The active coating of the electrodes has the following composition: 40 wt. % Ru and 60 wt. % TiO2. After processing the electrodes in the melt, they are cooled in cold water.

Результаты онытов при температуре расплава 360°С представлены в табл. 2.The results of the process at a melt temperature of 360 ° C are presented in Table. 2

Пример 3. Полосу титана, покрытую смесью, содержащей 40 вес. % RuO2 и 60 вес. % SnO2, погружают в расплав гидроокиси натри , содержащий 1,5 вес. % гидрида лити , на 1 мин. Температура расплава 360°С. После обработки в расплаве электрод мгновенно охлаждают в холодной воде и погружают в 10М раствор П28О4, нагретый до 80С, с выдержкой в нем до начала бурного выделени  газов. Затем полосу промывают в воде. Проведенна  обработка обеспечивает полное удаление покрыти . Поверхпость титана приП р е д м е т и з о б р с т е и и  Example 3. A strip of titanium coated with a mixture containing 40 weight. % RuO2 and 60 wt. % SnO2, immersed in a sodium hydroxide melt containing 1.5 wt. % lithium hydride, for 1 min. Melt temperature 360 ° C. After processing in the melt, the electrode is instantly cooled in cold water and immersed in a 10M solution of P28O4 heated to 80 ° C, held there until the onset of rapid evolution of gases. Then the strip is washed in water. The treatment carried out ensures complete removal of the coating. The surface of titanium is priPdedmet and z about brp and e and

Claims (2)

1. Способ удалепи  активного покрыти , содержащего окисел металла платиновой группы , с титановой подложки электрода путем обработки электрода в расплаве гидроокисн щелочного металла, иапри.мер гид)оокиси натри , отличающийс  тем, что, с целью интенсификации процесса и сокращени  потерь титана , в расплав ввод т гидрид щелочного металла, например гидрид натри , в количестве 0,1-2,5 вес. %, предпочтительно1. A method of removing an active coating containing a platinum-group metal oxide from a titanium electrode substrate by treating an electrode in an alkali metal hydroxide melt, i.a. sodium hydroxide, characterized in that, in order to intensify the process and reduce titanium loss, to the melt alkali metal hydride is added, for example sodium hydride, in an amount of 0.1-2.5 wt. % preferably 0,5-2,5 вес. %, обработку ведут при 345-450°С в течение 10-180 сек, предпочтительно 60-180 сек, после чего электрод промывают и охлаждают в воде.0.5-2.5 weight. %, the treatment is carried out at 345-450 ° C for 10-180 seconds, preferably 60-180 seconds, after which the electrode is washed and cooled in water. 2. Способ по п. I, отличающийс  тем, что электрод после промывки и ох.шжденп  в воде обрабатывают в гор чем разбавленном растворе неорганической кислоты, нанример в ЮМ растворе серной кислоты, нагретом до2. A method according to claim I, characterized in that the electrode, after washing and cooled in water, is treated in a hot dilute solution of an inorganic acid, and in a YuM sulfuric acid solution heated to 60-80°С, в течение 0,5-3 мин, затем повторно промывают в воде.60-80 ° C for 0.5-3 min, then re-washed in water.
SU1673266A 1970-06-26 1971-06-24 Method of removing active coating containing platinum group metal oxide from titanium electrode substrate SU490279A3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3104870 1970-06-26

Publications (1)

Publication Number Publication Date
SU490279A3 true SU490279A3 (en) 1975-10-30

Family

ID=10317183

Family Applications (1)

Application Number Title Priority Date Filing Date
SU1673266A SU490279A3 (en) 1970-06-26 1971-06-24 Method of removing active coating containing platinum group metal oxide from titanium electrode substrate

Country Status (10)

Country Link
US (1) US3706600A (en)
JP (1) JPS5529153B1 (en)
BE (1) BE769041A (en)
CA (1) CA919560A (en)
FR (1) FR2099942A5 (en)
GB (1) GB1312375A (en)
IL (1) IL37073A (en)
MY (1) MY7400198A (en)
SU (1) SU490279A3 (en)
ZA (1) ZA714129B (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4132569A (en) * 1977-10-25 1979-01-02 Diamond Shamrock Corporation Ruthenium recovery process
US4246083A (en) * 1978-08-31 1981-01-20 Johnson, Matthey & Co., Limited Removal of surface material
DE3032480C2 (en) * 1980-08-28 1983-10-13 C. Conradty Nürnberg GmbH & Co KG, 8505 Röthenbach Process for removing electrocatalytically effective protective coatings from electrodes with a metal core and application of the process
US4339281A (en) * 1981-08-20 1982-07-13 Rca Corporation Shank diamond cleaning
US5366598A (en) * 1989-06-30 1994-11-22 Eltech Systems Corporation Method of using a metal substrate of improved surface morphology
US5324407A (en) * 1989-06-30 1994-06-28 Eltech Systems Corporation Substrate of improved plasma sprayed surface morphology and its use as an electrode in an electrolytic cell
US5314601A (en) * 1989-06-30 1994-05-24 Eltech Systems Corporation Electrodes of improved service life
US5141563A (en) * 1989-12-19 1992-08-25 Eltech Systems Corporation Molten salt stripping of electrode coatings
US8323415B2 (en) 2006-08-10 2012-12-04 GM Global Technology Operations LLC Fast recycling process for ruthenium, gold and titanium coatings from hydrophilic PEM fuel cell bipolar plates

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2891881A (en) * 1957-01-02 1959-06-23 Albert L Jaffe Recovery of metals
DE1546112C3 (en) * 1965-05-12 1973-11-22 Dynamit Nobel Ag, 5210 Troisdorf Process for reducing the hydride losses in hydride-containing melts
US3502503A (en) * 1967-05-10 1970-03-24 Reactive Metals Inc Descaling of titanium and alloys thereof
GB1214579A (en) * 1968-02-28 1970-12-02 Chemner Ag Improvements in or relating to the re-constitution of electrodes

Also Published As

Publication number Publication date
IL37073A (en) 1974-07-31
IL37073A0 (en) 1971-08-25
GB1312375A (en) 1973-04-04
US3706600A (en) 1972-12-19
FR2099942A5 (en) 1972-03-17
CA919560A (en) 1973-01-23
JPS5529153B1 (en) 1980-08-01
MY7400198A (en) 1974-12-31
ZA714129B (en) 1973-02-28
BE769041A (en) 1971-12-27

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