DE892946C - Corrosion protection for electric heating rods - Google Patents

Corrosion protection for electric heating rods

Info

Publication number
DE892946C
DE892946C DES13060D DES0013060D DE892946C DE 892946 C DE892946 C DE 892946C DE S13060 D DES13060 D DE S13060D DE S0013060 D DES0013060 D DE S0013060D DE 892946 C DE892946 C DE 892946C
Authority
DE
Germany
Prior art keywords
corrosion protection
electric heating
protective tube
heating rods
thermal treatment
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
Application number
DES13060D
Other languages
German (de)
Inventor
Walter Dipl-Ing Fischer
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.)
Siemens AG
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Priority to DES13060D priority Critical patent/DE892946C/en
Application granted granted Critical
Publication of DE892946C publication Critical patent/DE892946C/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H05B3/00—Ohmic-resistance heating
    • H05B3/40—Heating elements having the shape of rods or tubes
    • H05B3/42—Heating elements having the shape of rods or tubes non-flexible
    • H05B3/48—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material

Landscapes

  • Resistance Heating (AREA)
  • Heat Treatment Of Articles (AREA)

Description

Korrosionsschutz für elektrische Heizstäbe Es sind elektrische Heizstäbe bekannt, die ein Schutzrohr aus Flußeisen besitzen. Für solche Schutzrohre muß ein guter Korrosionsschutz geschaffen werden, der auch den auftretenden Temperaturbeanspruchungen gut widersteht. Man hat bisher zu diesem Zweck eine Aluminiumlackschicht auf das Schutzrohr aufgetragen, welche bei etwa 450° C eingebrannt wird. Diese Schutzschicht genügt nicht -immer den praktischen Erfordernissen. Ferner erfordert die gewünschte hohe Belastung der Heizstäbe mit Rücksicht auf eine bessere Abstrahlung eine dunkle Oberfläche, was für die bekannte Schutzschicht nicht zutrifft.Corrosion protection for electric heating elements They are electric heating elements known who have a protective tube made of fluoro iron. For such protective tubes a Good corrosion protection can be created, which also takes the occurring temperature loads resists well. So far, an aluminum lacquer layer has been applied to the for this purpose Protective tube applied, which is burned in at around 450 ° C. This protective layer does not always meet the practical requirements. It also requires the desired high load on the heating rods with regard to better radiation a dark one Surface, which does not apply to the known protective layer.

Erfindungsgemäß wird die gestellte Aufgabe dadurch gelöst, daß das Schutzrohr des Heizstabes durch thermische Behandlung in einer Wasserdampfatmosphäre mit einem dünnen Überzug von Eisenoxyduloxyd versehen wird. Ein solcher überzug ist sehr temperaturbeständig und bringt den Vorteil, daß er durch seine dunkle Farbe eine gute Abstrahlung vom Heizstab gewährleistet. Man wird vorzugsweise bei der thermischen Behandlung des Schutzrohres kurzzeitig eine Glühtemperatur von etwa goo° C anwenden.According to the invention, the object is achieved in that the Protective tube of the heating rod through thermal treatment in a steam atmosphere is provided with a thin coating of iron oxide. Such a cover is very temperature resistant and has the advantage that it is dark in color ensures good radiation from the heating element. One is preferably at the thermal treatment of the protective tube briefly an annealing temperature of about Apply goo ° C.

Claims (2)

PATENTANSPRÜCHE: i. Korrosionsschutz für elektrische Heizstäbe, die mit einem Schutzrohr aus Flußeisen versehen sind, dadurch gekennzeichnet, daß das Schutzrohr des Heizstabes durch thermische Behandlung in einer Wasserdampfatmosphäre mit einem dünnen Überzug von Eisenoxyduloxyd versehen wird. PATENT CLAIMS: i. Corrosion protection for electric heating elements that are provided with a protective tube made of fluoro iron, characterized in that the Protective tube of the heating rod through thermal treatment in a steam atmosphere is provided with a thin coating of iron oxide. 2. Anordnung nach Anspruch i, gekennzeichnet durch die kurzzeitige Anwendung einer Glühtemperatur von etwa goo° C bei der thermischen Behandlung des Schutzrohres.2. Arrangement according to claim i, characterized by the brief application of an annealing temperature of about goo ° C for the thermal treatment of the protective tube.
DES13060D 1943-03-20 1943-03-20 Corrosion protection for electric heating rods Expired DE892946C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DES13060D DE892946C (en) 1943-03-20 1943-03-20 Corrosion protection for electric heating rods

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES13060D DE892946C (en) 1943-03-20 1943-03-20 Corrosion protection for electric heating rods

Publications (1)

Publication Number Publication Date
DE892946C true DE892946C (en) 1953-10-12

Family

ID=7474201

Family Applications (1)

Application Number Title Priority Date Filing Date
DES13060D Expired DE892946C (en) 1943-03-20 1943-03-20 Corrosion protection for electric heating rods

Country Status (1)

Country Link
DE (1) DE892946C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2392162A1 (en) * 1977-05-25 1978-12-22 Elpag Ag Chur TUBULAR HEATING BODY FOR HOUSEHOLD APPLIANCES

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2392162A1 (en) * 1977-05-25 1978-12-22 Elpag Ag Chur TUBULAR HEATING BODY FOR HOUSEHOLD APPLIANCES

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