US1797805A - Protected carbon electrode - Google Patents

Protected carbon electrode Download PDF

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Publication number
US1797805A
US1797805A US324322A US32432228A US1797805A US 1797805 A US1797805 A US 1797805A US 324322 A US324322 A US 324322A US 32432228 A US32432228 A US 32432228A US 1797805 A US1797805 A US 1797805A
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US
United States
Prior art keywords
electrode
carbon electrode
protected carbon
oxidation
carbon
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
US324322A
Inventor
Suchy Robert
Staib Karl
Moschel Wilhelm
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.)
IG Farbenindustrie AG
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IG Farbenindustrie AG
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 IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Application granted granted Critical
Publication of US1797805A publication Critical patent/US1797805A/en
Anticipated expiration legal-status Critical
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • C04B41/5007—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with salts or salty compositions, e.g. for salt glazing
    • C04B41/5015—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with salts or salty compositions, e.g. for salt glazing containing phosphorus in the anion, e.g. phosphates
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
    • C04B41/81—Coating or impregnation
    • C04B41/85—Coating or impregnation with inorganic materials
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B7/00—Heating by electric discharge
    • H05B7/02—Details
    • H05B7/06—Electrodes
    • H05B7/08—Electrodes non-consumable
    • H05B7/085—Electrodes non-consumable mainly consisting of carbon
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/0087—Uses not provided for elsewhere in C04B2111/00 for metallurgical applications

Definitions

  • This invention relates to the method of protecting carbon-electrodes from oxidation.
  • Electrodes for use in electric furnaces e. g. in cells for fusion-electrolysis, are generally subjected to considerable wear owing to the oxidizing action of the surrounding air on those parts of the electrode which project from 'the interior of the furnace.
  • a large number of means have already been proposed for obviating this detrimental efiect. All of them, however, according to our knowledge, have hitherto failed to produce a definitely favourable result.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Electrolytic Production Of Metals (AREA)
  • Electrodes For Compound Or Non-Metal Manufacture (AREA)

Description

Patented Mar. 24,1931
Eur OFFICE ROBERT SUCHY, KARL STAIB, AND WILHELM MOSCHEL, OF IBITTERFELCD, GERMANY,
ASSIGNORS T GQIEARIBENINDUSTRIE AKT'IENGESELLSCHAFT, OF FRANKFORT- ON-THE-MAIN, GERMANY, CORPORATION OF GERMANY PROTECTED CARBON ELECTRODE No Drawing. Application filed December 6, 1928, Serial No. 324,322, and in Germany December 28, 1927.
This invention relates to the method of protecting carbon-electrodes from oxidation.
Electrodes for use in electric furnaces, e. g. in cells for fusion-electrolysis, are generally subjected to considerable wear owing to the oxidizing action of the surrounding air on those parts of the electrode which project from 'the interior of the furnace. A large number of means have already been proposed for obviating this detrimental efiect. All of them, however, according to our knowledge, have hitherto failed to produce a definitely favourable result.
We have now discovered that this object of protecting electrodes from oxidation may be effected to a hitherto unattained degree by A soaking the surface of the baked electrode with a concentrated solution of phos horic acid. The effect will be shown clearly y the following instances:
(1) An ordinary graphited carbOn-elec trode, being kept at attemperature of about 500 C. and allowing free access to the, air, was found to undergo considerable oxidation within 36 hours, whilst a similar electrode, previously soaked with'phosphoric acid and then subjected to the same conditions for ten days and more, displayed no sign of wear due to oxidation.
(2) By soaking the upper part of an ordinary-carbon-electrode, projecting from a cell for fusion-electrolysis, with phosphoric acid,
the attack of the surface of the electrode by oxidation was completely inhibited.
It is sufficient to subject to the treatment described only such parts of the electrode as are exposed to the air. The concentration of the acid used for the treatment appears to be of small account;
however it is preferable, for other reasons, to
In testimony whereof *we have hereunto set f apply a concentrated acid containing at least 50 percent of H PO 'The solution of phosphoric acid is preferbrush; Having new claim:
A carbon-electrode, containing phosphoric acid in the'parts of the surface exposed to the atmosphere when used in an electric furnace.
. ably applied to the electrode by means of a described our invention, we
US324322A 1927-12-23 1928-12-06 Protected carbon electrode Expired - Lifetime US1797805A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1797805X 1927-12-23

Publications (1)

Publication Number Publication Date
US1797805A true US1797805A (en) 1931-03-24

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Family Applications (1)

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US324322A Expired - Lifetime US1797805A (en) 1927-12-23 1928-12-06 Protected carbon electrode

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US (1) US1797805A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2556830A (en) * 1947-01-20 1951-06-12 Dow Chemical Co Graphite anode

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2556830A (en) * 1947-01-20 1951-06-12 Dow Chemical Co Graphite anode

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