DE1101906B - Electrical corrosion protection for metal bodies exposed to hot gases - Google Patents

Electrical corrosion protection for metal bodies exposed to hot gases

Info

Publication number
DE1101906B
DE1101906B DES60598A DES0060598A DE1101906B DE 1101906 B DE1101906 B DE 1101906B DE S60598 A DES60598 A DE S60598A DE S0060598 A DES0060598 A DE S0060598A DE 1101906 B DE1101906 B DE 1101906B
Authority
DE
Germany
Prior art keywords
hot gases
metal bodies
corrosion protection
protective
application
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.)
Pending
Application number
DES60598A
Other languages
German (de)
Inventor
Dipl-Ing Otto Bess
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 DES60598A priority Critical patent/DE1101906B/en
Publication of DE1101906B publication Critical patent/DE1101906B/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
    • C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
    • C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/40—Arrangements for preventing corrosion
    • F24H9/45—Arrangements for preventing corrosion for preventing galvanic corrosion, e.g. cathodic or electrolytic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/40—Arrangements for preventing corrosion
    • F24H9/45—Arrangements for preventing corrosion for preventing galvanic corrosion, e.g. cathodic or electrolytic means
    • F24H9/455—Arrangements for preventing corrosion for preventing galvanic corrosion, e.g. cathodic or electrolytic means for water heaters
    • 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
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F2213/00—Aspects of inhibiting corrosion of metals by anodic or cathodic protection
    • C23F2213/20—Constructional parts or assemblies of the anodic or cathodic protection apparatus
    • C23F2213/22—Constructional parts or assemblies of the anodic or cathodic protection apparatus characterized by the ionic conductor, e.g. humectant, hydratant or backfill

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)

Description

Elektrischer Korrosionsschutz für heißen Gasen ausgesetzte Metallkörper Gegenstand der Erfindung ist ein elektrischer Korrosionsschutz für Metallkörper, .die gegenüber einer Schutzanode so gepolt sind, .daß ein dem Korrosionsstrom entgegenwirkender Strom zwischen Metallkörper und Schutzanode über den Elektrolyten fließt.Electrical corrosion protection for metal bodies exposed to hot gases The subject of the invention is an electrical corrosion protection for metal bodies, .which are polarized in relation to a protective anode in such a way that one counteracts the corrosion current Current flows between the metal body and the protective anode via the electrolyte.

Derartige Schutzanordnungen bzw. Schutzmaßnahmen sind an sich bei Metallen bekannt, die zumindest an der Stelle der Korrosion einem flüssigen Elektrolyten ausgesetzt sind. Es hat sich ergeben, daß auch bei heißen Gasen ausgesetzten Metallen, beispielsweise Rohrsystemen von Kesselanlagen, ähnliche Korrosionserscheinungen auftreten, die bisher nur durch Verwendung hochwertiger Werkstoffe in zulässigen Grenzen gehalten werden können, .da Schutzanstriche oder andere Arten der Abdichtung gegenüber Umgebungseinflüssen wegen der hohen Temperatur nicht haltbar sind.Such protective arrangements or protective measures are actually included Metals known to have a liquid electrolyte at least at the point of corrosion are exposed. It has been found that even with metals exposed to hot gases, For example, pipe systems in boiler systems, similar signs of corrosion occur that were previously only permitted through the use of high-quality materials Limits can be kept, as protective coatings or other types of waterproofing are not durable against environmental influences because of the high temperature.

Die Erfindung besteht nun in der Anwendung des an sich bekannten elektrischen Korrosionsschutzes auf Metallkörper, die heißen Gasen ausgesetzt sind, wobei der Erfindung die Erkenntnis zugrunde liegt, daß derartige heiße Gase ebenfalls elektrisch leitfähig sind und somit die Rolle des Elektrolyten übernehmen können. Die Leitfähigkeit der heißen Gase, die von der Temperatur, von ihrer Zusammensetzung und von weiteren hier nicht näher interessierenden Einflüssen abhängt, bestimmt dann den zeitlichen Verlauf der Korrosion.The invention now consists in the application of the electrical known per se Corrosion protection on metal bodies that are exposed to hot gases, the Invention is based on the knowledge that such hot gases are also electrical are conductive and can therefore take on the role of the electrolyte. The conductivity the hot gases, the temperature, their composition and others influences that are not of particular interest here, then determines the temporal one Corrosion progression.

Die erfindungsgemäße Anwendung dieses elektrischen Korrosionsschutzes eignet sich besonders für den Schutz von Rohrkesselanlagen, wobei vorzugsweise flüssigkeitsgekühlte Schutzanoden verwendet werden können. In anderen Fällen, bei denen eine Installation eines Flüssigkeitsumlaufes zur Kühlung der Schutzanoden zu aufwendig oder aus Raumgründen überhaupt nicht möglich ist, können auch ungekühlte temperaturbeständige Schutzanoden verwendet werden.The application according to the invention of this electrical corrosion protection is particularly suitable for protecting tubular boiler systems, preferably liquid-cooled Protective anodes can be used. In other cases where an installation a liquid circulation for cooling the protective anodes is too expensive or for reasons of space is not possible at all, uncooled temperature-resistant protective anodes can also be used be used.

Die Schutzanoden werden der jeweiligen Gestalt der zu schützenden Metallteile angepaßt und räumlich =diesen so angeordnet, und zusammen mit dein Schützling an eine Gleichstromquelle so angeschlossen, daß die Anode das positive Potential gegenüber :dem Schützling hat. Die Schutzanode oder -anoden können bei Kesselanlagen beispielsweise im Feuerraum, und zwar außerhalb der Feuerzone, angeordnet werden.The protective anodes are of the respective shape of the one to be protected Metal parts adapted and spatially = these arranged in such a way, and together with your protégé connected to a direct current source so that the anode has the positive potential opposite: the protégé has. The protective anode or anodes can be used in boiler systems for example in the firebox, outside the fire zone.

Claims (4)

PATENTANSPRÜCHE: 1. Anwendung des Korrosionsschutzes für Metallkörper, die gegenüber einer Schutzanode so gepolt sind, daß ein dem Korrosionsstrom entgegenwirkender Strom zwischen Metallkörper und Schutzanode über den Elektrolyten fließt, auf heißen Gasen ausgesetzte Metallkörper. PATENT CLAIMS: 1. Application of corrosion protection for metal bodies which are polarized with respect to a protective anode in such a way that a current counteracting the corrosion current flows between the metal body and the protective anode via the electrolyte, metal bodies exposed to hot gases. 2. Anwendung des Verfahrens nach Anspruch 1 zum Schutz von Rohrkesselanlagen. 2. Application of the method according to claim 1 for Protection of tube boiler systems. 3. Anwendung des Verfahrens nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, daß flüssigkeitsgekühlte Schutzanoden verwendet werden. 3. Application of the method according to claims 1 and 2, characterized in that liquid-cooled protective anodes are used. 4. Anwendung des Verfahrens nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, daß ungekühlte temperaturbeständige Schutzanoden verwendet werden.4. Application of the method according to claims 1 and 2, characterized in that that uncooled, temperature-resistant protective anodes are used.
DES60598A 1958-11-13 1958-11-13 Electrical corrosion protection for metal bodies exposed to hot gases Pending DE1101906B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DES60598A DE1101906B (en) 1958-11-13 1958-11-13 Electrical corrosion protection for metal bodies exposed to hot gases

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES60598A DE1101906B (en) 1958-11-13 1958-11-13 Electrical corrosion protection for metal bodies exposed to hot gases

Publications (1)

Publication Number Publication Date
DE1101906B true DE1101906B (en) 1961-03-09

Family

ID=7494223

Family Applications (1)

Application Number Title Priority Date Filing Date
DES60598A Pending DE1101906B (en) 1958-11-13 1958-11-13 Electrical corrosion protection for metal bodies exposed to hot gases

Country Status (1)

Country Link
DE (1) DE1101906B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1289717B (en) * 1965-10-30 1969-02-20 Friemann & Wolf Gmbh Process for the corrosion protection of metallic connecting parts in alkaline accumulators

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1289717B (en) * 1965-10-30 1969-02-20 Friemann & Wolf Gmbh Process for the corrosion protection of metallic connecting parts in alkaline accumulators

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