EP0674021B1 - Verfahren zur Verhinderung der Korrosion von Metallen in wässrigen Systemen - Google Patents
Verfahren zur Verhinderung der Korrosion von Metallen in wässrigen Systemen Download PDFInfo
- Publication number
- EP0674021B1 EP0674021B1 EP95103622A EP95103622A EP0674021B1 EP 0674021 B1 EP0674021 B1 EP 0674021B1 EP 95103622 A EP95103622 A EP 95103622A EP 95103622 A EP95103622 A EP 95103622A EP 0674021 B1 EP0674021 B1 EP 0674021B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- methylene blue
- sodium
- systems
- water circuit
- inhibitor
- 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
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
- 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
-
- 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
-
- 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
Definitions
- the invention relates to the use of an inhibitor to prevent corrosion in aqueous systems. From the Lexicon Römpp, 9th edition, Vol. 4, p. 2749, it is known that methylene blue in the. Pond management works against algae and fungi.
- DE 28 12 261 A1 mentions that methylene blue is a has antimicrobial effects.
- DE 31 35 194 C2 describes the prevention of algae and mucus bacteria growth in aqueous systems by adding methylene blue.
- BE-A-0 661 452 and DE-B-1 696 316 describe methods of corrosion protection of metallic objects. Each time Hydrazine as an oxygen binder and methylene blue used as an activator.
- US-A-4 311 599 describes one measure for corrosion protection, with methylene blue in its reduced form is used for oxygen binding.
- phosphorus-containing compounds e.g. Phosphonic acids or inorganic phosphates
- heavy metal salts Zinc salts, sodium molybdates, sodium chromates
- sodium nitrite, sodium nitrate, sodium borate, sodium benzoate and triazole derivatives e.g. sodium nitrite, sodium nitrate, sodium borate, sodium benzoate and triazole derivatives.
- the appendix regulates especially for open cooling water systems 31 to paragraph 7a of the Water Resources Act "Wastewater from cooling circuits "type and amount of water treatment Substances to be used in such systems, especially the use of microbicides is severely restricted.
- Combinations containing phosphorus have the disadvantage that they often exacerbated by eutrophication of the water system lead to biological growth and additional use of microbicides.
- the use of this Combinations containing phosphorus can continue to be used of water with greater water hardness to form apatite or apatite-like deposits that lead to malfunctions lead and are very difficult to remove.
- methylene blue is a has a good anti-corrosion effect without the mentioned technical Show disadvantages. This turns methylene blue on adsorbed on the metal surfaces. This adsorption will obviously favored by the aromatic structure the connection; the effect is due to the ring nitrogen atom additionally supported.
- Methylene blue causes of the strongly cathodically effective inhibition of the Methylene blue is an inhibitor of transport in the diffusion film.
- the transport-inhibiting substance consists of heavy soluble compounds that are in the cathodic range form the metal surface.
- Methylene blue in the formation of iron materials Protective magnetite layer by partially stabilizing the iron II ions formed in the first stage of corrosion.
- the amounts which are expediently added to the aqueous system here are in the range from 0.1-1000 g / m 3 , preferably 1-10 g / m 3 .
- Methylene blue is produced per se known methods and is not the subject of the invention.
Description
Claims (5)
- Verwendung eines Inhibitors zur Verhinderung der Korrosion von Metallen in wäßrigen Systemen, wobei der Inhibitor im wesentlichen aus 3,7 - Bis (dimethylamino) - phenothiaziniumchlorid (Methylenblau) besteht.
- Verwendung nach Anspruch 1, wobei das Methylenblau in einer Menge von 0,1 - 1000 g/m3, vorzugsweise 1 - 10 g/m3, zugesetzt wird.
- Verwendung von Methylenblau nach Anspruch 1 oder 2, in einer Kombination mit zusätzlichen Härtestabilisatoren und Dispergiermitteln, vorzugsweise auf Basis von Polyacrylsäuren, Polycarbonsäuren und Phosphonsäuren sowie deren Natriumsalzen.
- Verwendung von Methylenblau nach einem der Ansprüche 1 bis 3,
in Kombination mit zusätzlichen bekannten Korrosionsinhibitoren, vorzugsweise Natriummolybdat, Natriumsilikate, Natriumphosphate, Natriumnitrat, spezielle Phoshonsäuren und Phosphonate sowie Zinksalzen. - Verwendung von Methylenblau nach einem der Ansprüche 1 bis 4 in einem Kühlkreislauf, einer Luftbefeuchtungsanlage, einem Prozeßwasserkreislauf, einem Heizungswasserkreislauf, einem Heißwasserkreislauf oder einem Kaltwasserkreislauf.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4409990 | 1994-03-23 | ||
DE4409990A DE4409990A1 (de) | 1994-03-23 | 1994-03-23 | Verfahren zur Verhinderung der Korrosion von Metallen in wäßrigen Systemen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0674021A1 EP0674021A1 (de) | 1995-09-27 |
EP0674021B1 true EP0674021B1 (de) | 2000-12-06 |
Family
ID=6513602
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95103622A Expired - Lifetime EP0674021B1 (de) | 1994-03-23 | 1995-03-14 | Verfahren zur Verhinderung der Korrosion von Metallen in wässrigen Systemen |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0674021B1 (de) |
AT (1) | ATE197970T1 (de) |
DE (2) | DE4409990A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4427038C2 (de) * | 1994-07-29 | 1998-05-20 | Schilling Chemie Gmbh U Produk | Verfahren zur Entfernung in Wasser gelösten Sauerstoffes, insbesondere in wasserführenden, geschlossenen Systemen |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1361613A (fr) * | 1962-05-08 | 1964-05-22 | Shell Res Ltd | Perfectionnements aux compositions refroidissantes ou lubrifiantes pour le travail des métaux |
DE1696316C2 (de) * | 1962-08-14 | 1974-10-03 | Fritz Dr. 8500 Nuernberg Boehmlaender | Verwendung von Hydrazinhydrat oder Hydrazinsalz zum Korrosionsschutz in Salzlösungen, insbesondere in Kühlkreislaufsalzlösungen und Kühlsolen |
CH458013A (de) * | 1964-03-21 | 1968-06-15 | Bayer Ag | Verfahren zum Korrosionsschutz von metallischen Gegenständen |
DE2919197A1 (de) * | 1979-05-12 | 1980-11-27 | Hoechst Ag | Verfahren zur herstellung von vinylchlorid-polymerisaten |
US4311599A (en) * | 1980-11-12 | 1982-01-19 | Nalco Chemical Company | Reduced methylene blue for oxygen removal |
-
1994
- 1994-03-23 DE DE4409990A patent/DE4409990A1/de not_active Withdrawn
-
1995
- 1995-03-14 AT AT95103622T patent/ATE197970T1/de not_active IP Right Cessation
- 1995-03-14 EP EP95103622A patent/EP0674021B1/de not_active Expired - Lifetime
- 1995-03-14 DE DE59508882T patent/DE59508882D1/de not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE4409990A1 (de) | 1995-09-28 |
DE59508882D1 (de) | 2001-01-11 |
EP0674021A1 (de) | 1995-09-27 |
ATE197970T1 (de) | 2000-12-15 |
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