DE818146C - Process for protecting iron, steel and iron alloys from corrosion - Google Patents
Process for protecting iron, steel and iron alloys from corrosionInfo
- Publication number
- DE818146C DE818146C DEP31266A DEP0031266A DE818146C DE 818146 C DE818146 C DE 818146C DE P31266 A DEP31266 A DE P31266A DE P0031266 A DEP0031266 A DE P0031266A DE 818146 C DE818146 C DE 818146C
- Authority
- DE
- Germany
- Prior art keywords
- nitroheterophene
- corrosion
- heterophenes
- packaging material
- iron
- 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
Links
- 238000005260 corrosion Methods 0.000 title claims description 14
- 230000007797 corrosion Effects 0.000 title claims description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims description 12
- 238000000034 method Methods 0.000 title claims description 11
- 229910000640 Fe alloy Inorganic materials 0.000 title claims description 5
- 229910000851 Alloy steel Inorganic materials 0.000 title claims description 4
- 239000010959 steel Substances 0.000 title claims description 4
- 229910052742 iron Inorganic materials 0.000 title description 5
- 229910052751 metal Inorganic materials 0.000 claims description 13
- 239000002184 metal Substances 0.000 claims description 13
- 239000000126 substance Substances 0.000 claims description 9
- 239000005022 packaging material Substances 0.000 claims description 7
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 239000000443 aerosol Substances 0.000 claims description 5
- 239000006185 dispersion Substances 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 3
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 claims description 3
- 239000002966 varnish Substances 0.000 claims description 3
- 239000013078 crystal Substances 0.000 claims description 2
- 239000000295 fuel oil Substances 0.000 claims description 2
- 239000010687 lubricating oil Substances 0.000 claims description 2
- 239000003973 paint Substances 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- YTPLMLYBLZKORZ-UHFFFAOYSA-N Thiophene Chemical compound C=1C=CSC=1 YTPLMLYBLZKORZ-UHFFFAOYSA-N 0.000 claims 2
- 239000004922 lacquer Substances 0.000 claims 1
- 150000002739 metals Chemical class 0.000 claims 1
- 230000003449 preventive effect Effects 0.000 claims 1
- 230000001681 protective effect Effects 0.000 claims 1
- 229930192474 thiophene Natural products 0.000 claims 1
- 125000004432 carbon atom Chemical group C* 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000000123 paper Substances 0.000 description 5
- JIZRGGUCOQKGQD-UHFFFAOYSA-N 2-nitrothiophene Chemical compound [O-][N+](=O)C1=CC=CS1 JIZRGGUCOQKGQD-UHFFFAOYSA-N 0.000 description 3
- 239000010426 asphalt Substances 0.000 description 3
- 229920003002 synthetic resin Polymers 0.000 description 3
- 239000000057 synthetic resin Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000001993 wax Substances 0.000 description 3
- YLQBMQCUIZJEEH-UHFFFAOYSA-N Furan Chemical compound C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 2
- ZRALSGWEFCBTJO-UHFFFAOYSA-N Guanidine Chemical compound NC(N)=N ZRALSGWEFCBTJO-UHFFFAOYSA-N 0.000 description 2
- KAESVJOAVNADME-UHFFFAOYSA-N Pyrrole Chemical compound C=1C=CNC=1 KAESVJOAVNADME-UHFFFAOYSA-N 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 150000002828 nitro derivatives Chemical class 0.000 description 2
- WFQDTOYDVUWQMS-UHFFFAOYSA-N 1-fluoro-4-nitrobenzene Chemical compound [O-][N+](=O)C1=CC=C(F)C=C1 WFQDTOYDVUWQMS-UHFFFAOYSA-N 0.000 description 1
- DRKFWQDBPGTSOO-UHFFFAOYSA-N 1-methyl-2-nitro-4-propan-2-ylbenzene Chemical compound CC(C)C1=CC=C(C)C([N+]([O-])=O)=C1 DRKFWQDBPGTSOO-UHFFFAOYSA-N 0.000 description 1
- VNHGETRQQSYUGZ-UHFFFAOYSA-N 1-nitro-2-phenoxybenzene Chemical compound [O-][N+](=O)C1=CC=CC=C1OC1=CC=CC=C1 VNHGETRQQSYUGZ-UHFFFAOYSA-N 0.000 description 1
- BSMKYQUHXQAVKG-UHFFFAOYSA-N 1-nitro-2-propan-2-ylbenzene Chemical compound CC(C)C1=CC=CC=C1[N+]([O-])=O BSMKYQUHXQAVKG-UHFFFAOYSA-N 0.000 description 1
- JXMYUMNAEKRMIP-UHFFFAOYSA-N 1-nitro-4-propan-2-ylbenzene Chemical compound CC(C)C1=CC=C([N+]([O-])=O)C=C1 JXMYUMNAEKRMIP-UHFFFAOYSA-N 0.000 description 1
- OIGLJQJSZJIDSO-UHFFFAOYSA-N 2,5-dinitrothiophene Chemical compound [O-][N+](=O)C1=CC=C([N+]([O-])=O)S1 OIGLJQJSZJIDSO-UHFFFAOYSA-N 0.000 description 1
- HCGYMSSYSAKGPK-UHFFFAOYSA-N 2-nitro-1h-indole Chemical compound C1=CC=C2NC([N+](=O)[O-])=CC2=C1 HCGYMSSYSAKGPK-UHFFFAOYSA-N 0.000 description 1
- FTBBGQKRYUTLMP-UHFFFAOYSA-N 2-nitro-1h-pyrrole Chemical compound [O-][N+](=O)C1=CC=CN1 FTBBGQKRYUTLMP-UHFFFAOYSA-N 0.000 description 1
- FUBFWTUFPGFHOJ-UHFFFAOYSA-N 2-nitrofuran Chemical compound [O-][N+](=O)C1=CC=CO1 FUBFWTUFPGFHOJ-UHFFFAOYSA-N 0.000 description 1
- PLAZTCDQAHEYBI-UHFFFAOYSA-N 2-nitrotoluene Chemical compound CC1=CC=CC=C1[N+]([O-])=O PLAZTCDQAHEYBI-UHFFFAOYSA-N 0.000 description 1
- -1 3-nitro-4 Chemical compound 0.000 description 1
- SIPCFXFCVTUAID-UHFFFAOYSA-N 3-nitrothiophene Chemical compound [O-][N+](=O)C=1C=CSC=1 SIPCFXFCVTUAID-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical class OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 1
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- LSDPWZHWYPCBBB-UHFFFAOYSA-N Methanethiol Chemical group SC LSDPWZHWYPCBBB-UHFFFAOYSA-N 0.000 description 1
- CHJJGSNFBQVOTG-UHFFFAOYSA-N N-methyl-guanidine Natural products CNC(N)=N CHJJGSNFBQVOTG-UHFFFAOYSA-N 0.000 description 1
- DJCVNLGYSGMROR-UHFFFAOYSA-M [Fe]F Chemical compound [Fe]F DJCVNLGYSGMROR-UHFFFAOYSA-M 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- WITCGPMUKHXQGW-UHFFFAOYSA-N cyclopenta[c]thiopyran Chemical compound C1=CSC=C2C=CC=C21 WITCGPMUKHXQGW-UHFFFAOYSA-N 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000000881 depressing effect Effects 0.000 description 1
- SWSQBOPZIKWTGO-UHFFFAOYSA-N dimethylaminoamidine Natural products CN(C)C(N)=N SWSQBOPZIKWTGO-UHFFFAOYSA-N 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 239000002655 kraft paper Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 150000007530 organic bases Chemical class 0.000 description 1
- 125000000962 organic group Chemical group 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- 125000000542 sulfonic acid group Chemical group 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
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
- C23F11/10—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 organic inhibitors
- C23F11/16—Sulfur-containing compounds
- C23F11/165—Heterocyclic compounds containing sulfur as hetero atom
-
- 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
- C23F11/02—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in air or gases by adding vapour phase inhibitors
-
- 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
- C23F11/10—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 organic inhibitors
- C23F11/14—Nitrogen-containing compounds
- C23F11/147—Nitrogen-containing compounds containing a nitrogen-to-oxygen bond
-
- 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
- C23F11/10—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 organic inhibitors
- C23F11/14—Nitrogen-containing compounds
- C23F11/149—Heterocyclic compounds containing nitrogen as hetero atom
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
- Paints Or Removers (AREA)
Description
Verfahren zum Schützen von Eisen, Stahl und Eisenlegierungen vor Korrosion Es wurde gefunden, daß sich Eisen, Stahl und Eisenlegierungen wirksam vor der Korrosion durch Luft und Wasserdampf schützen lassen, indem man <las Nietall mit einer U@sting. Dispersion. einem Aerosol oder dem Dampf eines nitrierten Heterophens zusammenbringt und/oder in Kontakt hält.Process for protecting iron, steel and iron alloys from corrosion It has been found that iron, steel and iron alloys are effective against corrosion let air and water vapor protect you by <read nietall with a U @ sting. Dispersion. an aerosol or the vapor of a nitrated heterophene and / or keeps in contact.
Die Heterophene werden durch die Formel C4 H4 X dargestellt, in welcher die vier Kohlenstoffatome und das zweiwertige X einen Ring bilden. Zwischen den Kohlenstoffatomen 2 und 3 und den Kohlenstoffatomen 4 und 5 befindet sich je eine Doppelbindung. X kann O, S, Se oder NH sein. Ersetzt man ein oder mehrere Wasserstoffatome an den Kohlenstoffatomen durch Nitrogruppen, so erhält man die nitrierten Heterophene, auf deren Verwendung die Erfindung sich bezieht. Vorzugsweise werden nicht mehr als zwei Wasserstoffatome durch Nitrogruppen ersetzt. Die an den Kohlenstoffatomen des Rings sitzenden Wasserstoffatome können zum Teil durch organische Gruppen ersetzt sein, die an sich die Korrosion nicht begünstigen. Zwei dieser Wasserstoffatome können gemeinsam durch ein zweiwertiges Radikal ersetzt werden, so daß im Molekül ein zweiter Ring gebildet wird. Diese Wasserstoffatome können ferner auch zum Teil durch Halogen, insbesondere Chlor oder Brom, ersetzt sein. Substituenten, welche die Korrosion begünstigen, wie die Sulfonsäuregruppe oder die freie Mercaptangruppe, sind unerwünscht.The heterophenes are represented by the formula C4 H4 X, in which the four carbon atoms and the divalent X form a ring. Between Carbon atoms 2 and 3 and carbon atoms 4 and 5 are each one Double bond. X can be O, S, Se, or NH. Replacing one or more hydrogen atoms on the carbon atoms by nitro groups, one obtains the nitrated heterophenes, to the use of which the invention relates. Preferably no more than two hydrogen atoms replaced by nitro groups. The ones on the carbon atoms The hydrogen atoms in the ring can be replaced in part by organic groups which in themselves do not favor corrosion. Two of these hydrogen atoms can be replaced together by a divalent radical, so that in the molecule a second ring is formed. These hydrogen atoms can also partly be replaced by halogen, in particular chlorine or bromine. Substituents, which promote corrosion, such as the sulfonic acid group or the free mercaptan group, are undesirable.
Als Beispiele für geeignete Nitroheterophene seien folgende genannt: 2-Nitrothiophen, 3-Nitrothiophen, 2, 5-Dinitrothiophen, 3-Nitro-4, 5-benzothiophen, 2-Nitrofuran, 2-Nitropyrrol, 2-Nitroindol. Die Nitrothiophene und ihre Derivate sind in der Regel für den vorliegenden Zweck wirksamer als die sich von Furan- oder Pyrrolkern ableitenden Nitroverbindungen und deren Derivate. Von allen sich von einem speziellen Heterophenkern ableitenden Nitroverbindungen sind die a-Nitroverbindungen stets wirksamer als die anderen.The following are examples of suitable nitroheterophenes: 2-nitrothiophene, 3-nitrothiophene, 2,5-dinitrothiophene, 3-nitro-4, 5-benzothiophene, 2-nitrofuran, 2-nitropyrrole, 2-nitroindole. The nitrothiophenes and their derivatives are usually more effective for the present purpose than itself Nitro compounds derived from furan or pyrrole nuclei and their derivatives. from are all nitro compounds derived from a special heterophene nucleus the a-nitro compounds always more effective than the others.
Erfindungsgemäß kann ein 'Metall, dessen Korrosion verhindert werden soll, auf verschiedene Weise der Wirkung der Nitroheterophene ausgesetzt werden. Die wichtigste davon ist die, bei der das Metall mit einer Atmosphäre in Kontakt gebracht wird, die Dämpfe eines Nitroheterophens enthält.According to the invention, a 'metal, the corrosion of which can be prevented should be exposed to the action of nitroheterophene in various ways. The most important of these is the one where the metal is in contact with an atmosphere which contains vapors of a nitroheterophene.
Zu diesem Zweck kann man Metallgegenstände in einen Raum einbringen, der ganz oder annähernd ganz geschlossen werden kann und in welchem Dämpfe des Nitroheterophens vorhanden sind, eingeführt oder entwickelt werden. Die einfachste Art, solche Dämpfe in den geschlossenen Räumen entstehen zu lassen, besteht darin; eine bestimmte Menge des Nitroheterophens, z. B. als Kristallpulver oder als Lösung oder Dispersion in einer Flüssigkeit, gleichzeitig in solche Räume einzuführen.For this purpose one can bring metal objects into a room, which can be completely or almost completely closed and in which vapors of the nitroheterophene exist, be introduced or developed. The easiest way to get such fumes to let arise in the closed spaces consists in; a certain amount of nitroheterophene, e.g. B. as crystal powder or as a solution or dispersion in a liquid to be introduced into such spaces at the same time.
Der geschlossene Raum kann zweckmäßigerweise von Umhüllungsmaterial, das für die Dämpfe der zu verwendenden Nitroheterophene undurchlässig oder praktisch undurchlässig ist, gebildet werden. Man verpackt dann eine kleine Menge eines Nitroheterophens zusammen mit dem Metallgegenstand, der gegen Korrosion geschützt werden soll. Es ist auch möglich, ein Material wie Papier, in dem Nitroheterophen absorbiert ist, mit einzupacken. Packmaterialien, welche für die Dämpfe der Nitroheterophene undurchlässig sind, sind z. B. Metallfolien oder mit Wachs, Kunstharz, Asphalt oder ähnlichen Substanzen überzogenes oder imprägniertes Papier.The closed space can expediently be made of wrapping material, that impermeable or practical for the vapors of the nitroheterophene to be used is impermeable, are formed. A small amount of a nitroheterophene is then packaged together with the metal object that is to be protected against corrosion. It it is also possible to use a material such as paper in which nitroheterophene is absorbed, to pack with. Packing materials which are impermeable to the vapors of the nitroheterophene are, are z. B. metal foils or with wax, synthetic resin, asphalt or the like Paper coated or impregnated with substances.
Die Nitroheterophene können auch vorgängig der Verpackung vom Verpackungsmaterial selbst absorbiert oder auf dessen Oberfläche abgeschieden worden sein. In diesem Falle ist es vorteilhaft, wenn das Verpackungsmaterial aus mindestens zwei Schichten besteht, nämlich einer inneren, welche das Nitroheterophen enthält und nach und nach die korrosionsverhütenden Dämpfe al,gibt, und einer äußeren, welche für die Dämpfe praktisch undurchlässig ist. Für die innere Schicht verwendet man häufig Papier, z. B: Kraftpapier. Die äußere Schicht kann ebenfalls aus Papier bestehen, vorausgesetzt, daß man es in geeigneter Weise undurchlässig gemacht hat, z. B. durch Überziehen und/oder Imprägnieren mit Wachs, Kunstharzen oder Asphalt. Ein anderes geeignetes Material für die äußere Schicht ist eine Metallfolie. Gewünschtenfalls kann man auch von einem einzigen Blatt aus Papier oder ähnlichem Material Gebrauch machen, dessen eine Seite, die als Innenseite dienen soll, Nitroheterophendämpfe abgibt, während die andere Seite durch Bedecken mit Wachs, Kunstharz, Asphalt o. dgl. für diese Dämpfe undurchdringlich gemacht ist.The nitroheterophene can also be removed from the packaging material beforehand absorbed by itself or deposited on its surface. In this It is advantageous if the packaging material consists of at least two layers consists, namely an inner one, which contains the nitroheterophene and gradually and after the anti-corrosive vapors al, there, and an external one, which for the Is practically impermeable to vapors. Often used for the inner layer Paper, e.g. B: Kraft paper. The outer layer can also consist of paper, provided that it has been made impermeable in a suitable manner, e.g. B. by Coating and / or impregnating with wax, synthetic resins or asphalt. Another a suitable material for the outer layer is a metal foil. If so desired a single sheet of paper or similar material can also be used make, one side of which is to serve as the inside, nitroheterophene vapors while the other side is covered with wax, synthetic resin, asphalt, etc. Like. Is made impenetrable for these vapors.
Man kann die Nitroheterophene statt in Dampfform auch in wirksamer Weise als Aerosole verwenden. Diese Anwendungsweise ist besonders zweckmäßig bei Nitroheterophenen mit geringem Dampfdruck, z. B. weniger als 0,00002 mm Hg bei 2 1 ° C. Ein Aerosol kann erhalten werden, indem man ein Nitroheterophen unter Druck. in einem normalerweise gasförmigen Lösungsmittel auflöst und die entstandene Lösung durch eine enge Öffnung in einen Raum entspannen läßt, in welchem das Aerosol erwünscht ist.The nitroheterophenes can also be used effectively as aerosols instead of in vapor form. This mode of application is particularly useful for nitroheterophenes with low vapor pressure, e.g. , Less than 0.00002 mm Hg at 1 2 ° C. An aerosol can be obtained by reacting a Nitroheterophen under pressure. dissolves in a normally gaseous solvent and allows the resulting solution to relax through a narrow opening into a space in which the aerosol is desired.
Lösungen und Dispersionen von N itroheterophenen in geschlossenen Räumen können die Korrosion sowohl von Metallflächen, die mit diesen Flüssigkeiten in direktem Kontakt stehen, als auch der Metallflächen, die oberhalb des Flüssigkeitsspiegels nur mit den gebildeten Dämpfen in Kontakt sind, verhindern. Demzufolge können die Nitroheterophene mit großem Vorteil in teilweise mit Flüssigkeit gefüllten Tanks oder in hydraulisch betätigten Anlagen verwendet werden, wobei sie in der Flüssigkeit gelöst werden.Solutions and dispersions of nitroheterophenes in closed Broaching can cause corrosion of both metal surfaces that have been exposed to these fluids are in direct contact, as well as the metal surfaces that are above the liquid level are only in contact with the vapors formed. As a result, the Nitroheterophene with great advantage in partially liquid-filled tanks or used in hydraulically operated systems, being in the liquid be solved.
Die Nitroheterophene sind auch wirksame Mittel zur Herabsetzung der Abnutzung und des Verschleißes der beweglichen Teile von Dampfmaschinen, Dampfturbinen, Verbrennungskraftmaschinen u. dgl. infolge Korrosion. In diesen Fällen werden die Nitroheterophene dem Brennstoff oder den Schmierölen zugesetzt.The nitroheterophene are also effective agents for depressing Wear and tear of moving parts of steam engines, steam turbines, Internal combustion engines and the like due to corrosion. In these cases the Nitroheterophene added to fuel or lubricating oils.
Die Nitroheterophene können außerdem als Zusätze zu Firnissen, Anstrichmitteln und Lacken verwendet werden.The nitroheterophene can also be used as additives to varnishes and paints and varnishes can be used.
Die für den vorgesehenen Zweck erforderliche Menge an Nitroheterophenen hängt von verschiedenen Faktoren ab und kann innerhalb weiter Grenzen wechseln. Bei Packmaterialien haben sich Mengen von o,r bis -o g je tn'= als wirksam erwiesen. Vorzugsweise verwendet man Mengen von io bis 2o g/m2. Will man die Menge auf den Raum beziehen, in welchem sich die Dämpfe des verwendeten Nitroheterophens verteilen können, so verwendet man in der Regel 0,35 bis 500 g/m3, vorzugsweise 0,7 bis 14 9/m3.The amount of nitroheterophenes required for the intended purpose depends on various factors and can vary within wide limits. For packaging materials, quantities from o, r to -og per tn '= have proven to be effective. Quantities of 10 to 20 g / m 2 are preferably used. If the amount is to be related to the space in which the vapors of the nitroheterophene used can be distributed, 0.35 to 500 g / m 3, preferably 0.7 to 14 9 / m 3 is used as a rule.
Obschon mit den Nitroheterophenen die Korrosion tatsächlich auch in sauren Medien, z. B. mit einem pK-«'ert von ungefähr ,; l)el;ämpft Nverden kann, wird ein neutrales Nledittrn mit einem pm-Wert von etwa 6 bis 8 vorgezogen. Ein saures Medium fördert, insbesondere bei höheren Temperaturen, die Zersetzung der Nitroheterophene. Um die Stabilität dieser Verbindungen zu erhöhen, kann man alkalisch reagierende Substanzen oder solche, die mindestens Säure binden, zusetzen. Dazu kann man Substanzen verwenden, die, wenn sie mit \N'asser in 13eriihrung kommen. einen p Wert von mindestens 6 zur Folge haben. Viele organische Basen, wie Amine, Guanidin, sowie Carbonate und Bicarbonate von Alkali- und Erdalkalimetallen sind für diesen Zweck geeignet. In den meisten Fällen empfiehlt es sich, starke Alkali-und Erdalkalihydroxyde zu vermeiden. Die eiengen der zu verwendenden säurebindenden Substanzen sind sehr verschieden und können z. B. zwischen o, i und 25 Gewichtsprozent, bezogen auf die Menge des Nitroheterophens, liegen. 'In gewissen Fällen eml)fiehtt es sich, zwei oder mehr Nitroheterophene zusammen zu verwenden, insbesondere eine Kombination eines Nitroheterophens mit sehr niedrigem Dampfdruck, z. B. 0,0005 bis 0,00002 mm Hg bei 21 ° C, und eines Nitroheterophens mit höherem Dampfdruck, z. B. über o,ool mm Hg bei 21'C.Although with the nitroheterophenes the corrosion actually also occurs in acidic media, e.g. B. with a pK - "'ert of about,; l) el; attenuates Nverden can, a neutral denomination with a pm value of about 6 to 8 is preferred. A acidic medium promotes the decomposition of the Nitroheterophene. Alkaline can be used to increase the stability of these compounds add reactive substances or those that bind at least acid. In addition one can use substances which, when they come into contact with water. result in a p value of at least 6. Many organic bases, such as amines, Guanidine, as well as carbonates and bicarbonates of alkali and alkaline earth metals suitable for this purpose. In most cases it is best to use strong alkali and Avoid alkaline earth hydroxides. The number of acid-binding agents to be used Substances are very different and can e.g. B. between o, i and 25 percent by weight, based on the amount of nitroheterophene. 'In certain Cases eml) it is not necessary to use two or more nitroheterophene together, in particular a combination of a nitroheterophene with a very low vapor pressure, z. B. 0.0005 to 0.00002 mm Hg at 21 ° C, and a nitroheterophene with higher Vapor pressure, e.g. B. about o, ool mm Hg at 21'C.
Beispiel Streifen aus Flußeisen vom Format 5o X 12,5 mm wurden vollkommen gereinigt, getrocknet und gewogen-.Sie wurden in verschlossene Glasflaschen von 115 cm3 Inhalt, die 0,5 cm3 destilliertes Wasser und die aus nachstehender Tabelle ersichtlichen Zusätze an korrosionsverhindernden Stoffen enthielten, aufgehängt. Die Tabelle zeigt auch noch die anderen Variablen der Versuchsbedingungen für jeden einzelnen Fall.Example Strips of fluoro iron measuring 50 x 12.5 mm were completely cleaned, dried and weighed - they were placed in closed glass bottles of 115 cm3, which contained 0.5 cm3 of distilled water and the additives of corrosion-preventing substances shown in the table below. hung up. The table also shows the other variables of the experimental conditions for each individual case.
Das Eisen war nirgends in direktem Kontakt mit fester oder flüssiger
korrosionsverhindernder Substanz. Nach jedem Versuch wurde die Gewichtsdifferenz
der Streifen bestimmt.
Claims (3)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US818146XA | 1948-01-12 | 1948-01-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE818146C true DE818146C (en) | 1951-10-22 |
Family
ID=22166570
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEP31266A Expired DE818146C (en) | 1948-01-12 | 1949-01-09 | Process for protecting iron, steel and iron alloys from corrosion |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE818146C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1201654B (en) * | 1955-12-12 | 1965-09-23 | Nippon Kokan Kk | Use of nitronaphthalene as a corrosion inhibitor for iron and steel |
| DE1278806B (en) * | 1958-04-14 | 1968-09-26 | Daubert Chemical Co | Multi-layer packaging material based on plastic with corrosion protection for metal objects acting in the vapor phase |
-
1949
- 1949-01-09 DE DEP31266A patent/DE818146C/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1201654B (en) * | 1955-12-12 | 1965-09-23 | Nippon Kokan Kk | Use of nitronaphthalene as a corrosion inhibitor for iron and steel |
| DE1278806B (en) * | 1958-04-14 | 1968-09-26 | Daubert Chemical Co | Multi-layer packaging material based on plastic with corrosion protection for metal objects acting in the vapor phase |
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