DD280312A1 - MEANS OF PREVENTING CORROSION - Google Patents
MEANS OF PREVENTING CORROSION Download PDFInfo
- Publication number
- DD280312A1 DD280312A1 DD32616489A DD32616489A DD280312A1 DD 280312 A1 DD280312 A1 DD 280312A1 DD 32616489 A DD32616489 A DD 32616489A DD 32616489 A DD32616489 A DD 32616489A DD 280312 A1 DD280312 A1 DD 280312A1
- Authority
- DD
- German Democratic Republic
- Prior art keywords
- carbonate
- cooling water
- corrosion
- cooling
- concentrations
- Prior art date
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
- 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
-
- 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
- C23F11/148—Nitrogen-containing compounds containing a nitrogen-to-nitrogen bond
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- 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)
Abstract
Die Erfindung betrifft Mittel zur Eindaemmung bzw. Verhinderung lokaler Zerstoerungen der Carbonatschutzschichten auf metallischen Oberflaechen sowie der carbonatischen Bindemittelanteile in Betonteilen und somit zur Vermeidung von Korrosionsschaeden in Kuehlwassersystemen. Die Mittel enthalten Cyanamid oder Thiosemicarbazid.The invention relates to means for inhibiting or preventing local destruction of the carbonate protective layers on metallic surfaces and the carbonic binder components in concrete parts and thus to avoid corrosion damage in Kuehlwassersystemen. The agents contain cyanamide or thiosemicarbazide.
Description
Die erfindungsgemäßen Mittel werden in Konzentrationen von 0,01 bis 100g/m3 Kühlwasser, vorzugsweise von 0,5 bis 20g/m3, angewendet.The compositions of the invention are applied in concentrations of 0.01 to 100 g / m 3 of cooling water, preferably from 0.5 to 20 g / m 3.
Die erfindungsgemäßen Mittel können dem Kühlsystem entweder direkt flüssig, fest, in geeigneter Formulierung, jedoch vorzugsweise in Lösung zudosiert werden. Dir Dosierung erfolgt kontinuierlich oder diskontinuierlich, aber stets proportional zum Durchfluß bei Durchflußkühlung bzw. zur Absalzungsmenge bei Kreislaufkühlung.The compositions of the invention can be added to the cooling system either directly liquid, solid, in a suitable formulation, but preferably in solution. Dosing is carried out continuously or discontinuously, but always in proportion to the flow in the case of flow-through cooling or to the desalting amount in the case of circulation cooling.
Die erfindungsgemäßen Mittel können den Kühlsystemen allein oder gemeinsam mit anderen Kühlwasserbehandlungsmitteln, wie Stabilisatoren, Dispergator en, Mikrobioziden u.a., zugesetzt werden.The compositions according to the invention can be added to the cooling systems alone or together with other cooling water treatment agents, such as stabilizers, dispersants, microbiocides and the like.
Die in den nachfolgenden Beispielen angeführten Verbindungen enthält Tabelle 1.The compounds listed in the following examples are given in Table 1.
Tabelle 1: Erfindungsgemäße Verbindungen der allgemeinen Formel H2N-RTable 1: Compounds of the general formula H 2 NR
Verbindungs- RConnection R
1 CN1 CN
NH-NH2 NH-NH 2
Nachfolgende Beispiele dienen der Erläuterung de · Erfindung, ohne diese einzuschränken.The following examples serve to illustrate the invention without limiting it.
Die Labcrumursuchungen erfolgten an Kreislaufwasi.T mit nachstehend aufgeführter Charakteristik:The laboratory tests were carried out on Kreislaufwasi.T with the following characteristics:
Die erfindungsgemäßen Mittel wurden mit den aus Tabelle 2 zu entnehmenden Aufwandmengen 21 Kreislaufwasser zugesetzt und unter Belüftung bei 25-28°C 90 Tage inkubieri. In Abständen von 10 Tagen erfolgte die pH-Wert-Bestimmung. Kreislaufwasser ohne Zusatz der erfindung'igemäßen Mittel diente als Kontrolle.The compositions according to the invention were added to the circulating water at the application rates to be taken from Table 2 and incubated under aeration at 25-28 ° C. for 90 days. At intervals of 10 days, the pH was determined. Circulating water without adding the erfindung'igemäßen served as a control.
Tabelle 2: Der Einfluß der erfindungsgemäßen Mittel auf den pH-Wert des eingesetzten KreislaufwassersTable 2: The influence of the compositions of the invention on the pH of the circulating water used
21 Kreislaufwasser, die CaCO3-beschichtete Formkörper enthielten, wurden mit den der Tabelle 3 zu entnehmenden Aufwandmengen der erfindungsgemäßen Mittel versetzt und unter Belüftung 40 Tage bei 25-280C inkubiert. In Abständen von 5 Tagen erfolgte die Bestimmung der in Lösung gegangenen Ca-Ionen komplexometrisch mit EDTA. Kreislaufwasser mit einem CaCO -beschichteten Formkörper ohne Zusatz der erfindungsgemäßen Mittel diente als Kontrolle.21 circulation water, the CaCO 3 contained -coated moldings were added to the table 3 to be taken application rates of the compositions of the invention and incubated for 40 days at 25-28 0 C with aeration. At intervals of 5 days, the determination of the dissolved Ca ions was carried out complexometrically with EDTA. Circulated water with a CaCO-coated molding without addition of the compositions of the invention served as a control.
Tabelle 3: Der Einfluß der erfindungsgemäßen Mittel auf die Stabilität von CaCOa-Formkörpern im KreislaufwasserTable 3: The influence of the compositions according to the invention on the stability of CaCOa shaped bodies in the circulation water
Claims (3)
Frfindungsgemäß wurde festgestellt, daß Veibindungen der folgenden allgemeinen FormelThe object of the invention is. Find resources that protect the carbonate layers against local destruction, but at the same time are toxicologically safe and therefore environmentally friendly and economical to use in low amounts.
According to the invention, it has been found that compounds of the following general formula
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DD32616489A DD280312A1 (en) | 1989-03-02 | 1989-03-02 | MEANS OF PREVENTING CORROSION |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DD32616489A DD280312A1 (en) | 1989-03-02 | 1989-03-02 | MEANS OF PREVENTING CORROSION |
Publications (1)
Publication Number | Publication Date |
---|---|
DD280312A1 true DD280312A1 (en) | 1990-07-04 |
Family
ID=5607419
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DD32616489A DD280312A1 (en) | 1989-03-02 | 1989-03-02 | MEANS OF PREVENTING CORROSION |
Country Status (1)
Country | Link |
---|---|
DD (1) | DD280312A1 (en) |
-
1989
- 1989-03-02 DD DD32616489A patent/DD280312A1/en unknown
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