DE1521734A1 - Process for the protection of magnesium and its alloys against corrosion in organic liquids - Google Patents

Process for the protection of magnesium and its alloys against corrosion in organic liquids

Info

Publication number
DE1521734A1
DE1521734A1 DE19661521734 DE1521734A DE1521734A1 DE 1521734 A1 DE1521734 A1 DE 1521734A1 DE 19661521734 DE19661521734 DE 19661521734 DE 1521734 A DE1521734 A DE 1521734A DE 1521734 A1 DE1521734 A1 DE 1521734A1
Authority
DE
Germany
Prior art keywords
organic liquids
magnesium
ammonia
corrosion
protection
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
DE19661521734
Other languages
German (de)
Inventor
Gianfranco De Beni
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.)
European Atomic Energy Community Euratom
Original Assignee
European Atomic Energy Community Euratom
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 European Atomic Energy Community Euratom filed Critical European Atomic Energy Community Euratom
Publication of DE1521734A1 publication Critical patent/DE1521734A1/en
Pending legal-status Critical Current

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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
    • C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
    • C23F11/08—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids
    • C23F11/18—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids using inorganic inhibitors
    • C23F11/181—Nitrogen containing compounds
    • 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
    • C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
    • C23F11/08—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C15/00—Cooling arrangements within the pressure vessel containing the core; Selection of specific coolants
    • G21C15/28—Selection of specific coolants ; Additions to the reactor coolants, e.g. against moderator corrosion
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C5/00—Moderator or core structure; Selection of materials for use as moderator
    • G21C5/12—Moderator or core structure; Selection of materials for use as moderator characterised by composition, e.g. the moderator containing additional substances which ensure improved heat resistance of the moderator
    • G21C5/123—Moderators made of organic materials
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Plasma & Fusion (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Inorganic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)

Description

Europäische Atomgemeinschaft (BURATOM), Brüssel (Belgien)European Atomic Energy Community (BURATOM), Brussels (Belgium)

Verfahren zum Schutz von Magnesium und seiner Legierungen gegen Korrosion in organischen FlüssigkeitenProcess for protecting magnesium and its alloys against corrosion in organic liquids

Die Erfindung bezieht sich auf ein Verfahren zum Schutz von Magnesium und seiner Legierungen gegen Korrosion in organischen Flüssigkeiten, insbesondere zur Kühlung und/ oder Moderierung von Kernreaktoren.The invention relates to a method of protection of magnesium and its alloys against corrosion in organic liquids, especially for cooling and / or moderation of nuclear reactors.

Obgleich die Korrosion von Magnesium in sorgfältig gereinigtem Biphenyl weitgehend verringert bzw. verlangsamt werden kann, führt das Vorhandensein von Sauerstoffverbindungen sowie Wasserdampf zur Korrosion des Magnesiums und seiner Legierungen in einem solchen Umfang, daß ihre Verwendung in Reaktoren vom Typ ORGEL sich im allgemeinen als unbrauchbar erweisen.Although the corrosion of magnesium in carefully purified biphenyl is largely reduced or slowed down the presence of oxygen compounds and water vapor leads to the corrosion of the magnesium and its alloys to such an extent that their use in reactors of the ORGEL type is in general turn out to be unusable.

Es sind bereits zahlreiche Reagentien bekannt geworden, um ganz allgemein die Korrosion von Metallen zu verhindern. Hierzu ist vor allem das Ammoniak bekannt geworden,Numerous reagents have already become known to prevent the corrosion of metals in general. For this purpose, ammonia has become known in particular,

909838/1360909838/1360

das in wassergekühlten Reaktoren als Korrosionshemmittel benutzt wird. Das Ammoniak wirkt dabei als Korrosionshemmmittel nicht nur in polaren, sondern ebensogut auch in nicht polaren Flüssigkeiten, wie z. B-. Petrolium.which is used as a corrosion inhibitor in water-cooled reactors. The ammonia acts as a corrosion inhibitor not only in polar, but just as well in non-polar liquids, such as. B-. Petrolium.

Erfindungsgemäß besteht das Verfahren zum Schutz von Magnesium und seiner Legierungen gegen Korrosion in organischen flüssigkeiten, insbesondere zur Kühlung und/oder Moderierung von Kernreaktoren darin, daß man diesen organischen Flüssigkeiten als Korrosionshemmittel Ammoniak mit Kohlendioxyd hinzufügt, wobei das Ammoniak und das Kohlendioxyd durch Reagentien ersetzbarsind, die Ammoniak bzw. Kohlendioxyd unter den Bedingungen eines durch organische Flüssigkeiten gekühlten und/oder moderierten Kernreaktors bilden, freisetzen oder befreien.According to the invention, there is a method for protecting magnesium and its alloys against corrosion in organic liquids, in particular for cooling and / or Moderation of nuclear reactors in the fact that these organic liquids are used as corrosion inhibitors ammonia with carbon dioxide, the ammonia and the carbon dioxide being replaceable by reagents, the ammonia or carbon dioxide under the conditions of a nuclear reactor cooled and / or moderated by organic liquids form, release or liberate.

Dabei kann es durchaus vorteilhaft sein, die Gesamtmenge des erfindungsgemäßen Korrosionshemmittels zwischen 0,001 und 1ϊΟ Gewichtsprozenten der organischen Flüssigkeit zu variieren.It can be quite advantageous to keep the total amount of the corrosion inhibitor according to the invention between 0.001 and 1ϊΟ percent by weight of the organic liquid vary.

Wie gesagt ist die Verwendung von Magnesium oder seiner Legierungen in durch organische Flüssigkeiten gekühlten und/oder moderierten Reaktoren im allgemeinen ungeeignet. Das erfindungsgemäße Verfahren macht jedoch die Verwendung von Magnesium und seiner Legierungen in Reaktoren möglich,As I said, the use of magnesium or its alloys is in those cooled by organic liquids and / or moderated reactors are generally unsuitable. However, the method according to the invention makes use of magnesium and its alloys in reactors possible,

909838/1360 ,909838/1360,

wobei es sich gezeigt hat, daß der Korrosionsschutz gegen Wasserdampf und Sauerstoff bis zu Temperaturen von ca 500° C wirksam ist. Das reicht aber für die Bedürfnisse eines Reaktors vom Typ ORGEL vollkommen aus.it has been shown that the corrosion protection against water vapor and oxygen up to temperatures of approx is effective. But that is completely sufficient for the needs of an ORGEL type reactor.

Erfindungsgemäß kann Ammoniak durch andere basische Substanzen ersetzt werden, wie Methylamin oder seine Homologe oder auch durch Stickstoffverbindungen, die durch Zersetzung oder Reaktion mit anderen Substanzen, z. B. mit Harnstoff und Wasser Ammoniak liefern. Das Kohlendioxyd kann ebenfalls durch Substanzen ersetzt werden, die das Kohlendioxyd durch Zersetzung oder Reaktion mit anderen chemischen Verbindungen liefern. According to the invention, ammonia can be replaced by other basic substances be replaced, such as methylamine or its homologues, or by nitrogen compounds that are produced by decomposition or reaction with other substances, e.g. B. deliver ammonia with urea and water. The carbon dioxide can also be caused by substances which provide the carbon dioxide through decomposition or reaction with other chemical compounds.

Versuche haben gezeigt, daß Ammoniak allein die Korrosion des Magnesiums nur bis zu Temperaturen um 300° C zu verhindern mag.Tests have shown that ammonia alone prevents the corrosion of magnesium only up to temperatures of around 300 ° C like.

Erst die Kombination von CO9 und NH„ macht die Korrosionshemmung von Mg und seinen Legierungen bis ca 500° C wirksam.Only the combination of CO 9 and NH makes the corrosion inhibition of Mg and its alloys effective up to approx. 500 ° C.

909833/1360 Patentansprüche: Pd/H - 17 278909833/1360 Claims : Pd / H - 17 278

Claims (2)

Patentansprüche :Patent claims: 1. Verfahren zum Schutz von Magnesium und seiner Legierungen gegen Korrosion in organischen Flüssigkeiten, insbesondere zur Kühlung und/oder Moderierung von Kernreaktoren, dadurch gekennzeichnet, daß man diesen organischen Flüssigkeiten als Korrosionshemmittel Ammoniak mit Kohlendioxyd hinzufügt, wobei das Ammoniak und das Kohlendioxyd durch Reagentien ersetzbar sind, die Ammoniak bzw. Kohlendioxyd unter den Bedingungen eines durch organische Flüssigkeiten gekühlten und/oder moderierten Kernreaktors bilden, freisetzen oder befreien.1. Process for the protection of magnesium and its alloys against corrosion in organic liquids, in particular for cooling and / or moderating nuclear reactors, thereby characterized in that ammonia with carbon dioxide is added to these organic liquids as a corrosion inhibitor, whereby the ammonia and the carbon dioxide can be replaced by reagents, the ammonia and carbon dioxide respectively among the Forming conditions of a nuclear reactor cooled and / or moderated by organic liquids or free. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die gesamte Menge der Korrosionsmittel zwischen 0,001 und 1,0 Gewichtsprozenten der organischen Flüssigkeit variiert.2. The method according to claim 1, characterized in that the total amount of the corrosion agent between 0.001 and 1.0 Weight percent of the organic liquid varies. Pd/H - 17 278Pd / H - 17 278 909838/1360909838/1360
DE19661521734 1965-01-20 1966-01-11 Process for the protection of magnesium and its alloys against corrosion in organic liquids Pending DE1521734A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE7959 1965-01-20

Publications (1)

Publication Number Publication Date
DE1521734A1 true DE1521734A1 (en) 1969-09-18

Family

ID=3839791

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19661521734 Pending DE1521734A1 (en) 1965-01-20 1966-01-11 Process for the protection of magnesium and its alloys against corrosion in organic liquids

Country Status (6)

Country Link
BE (1) BE658577A (en)
DE (1) DE1521734A1 (en)
FR (1) FR1464544A (en)
GB (1) GB1113572A (en)
LU (1) LU50127A1 (en)
NL (1) NL6600515A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0102401A1 (en) * 1982-08-27 1984-03-14 Guldager Electrolyse International & Cie. Method of preventing scale deposits in water systems

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5817834B2 (en) * 1972-01-31 1983-04-09 三井東圧化学株式会社 Reiki Yakuyo Suijyunkansouchi no Boushiyokuhouhou

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0102401A1 (en) * 1982-08-27 1984-03-14 Guldager Electrolyse International & Cie. Method of preventing scale deposits in water systems

Also Published As

Publication number Publication date
GB1113572A (en) 1968-05-15
BE658577A (en) 1965-07-20
NL6600515A (en) 1966-07-21
FR1464544A (en) 1967-03-16
LU50127A1 (en) 1966-02-22

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