DE1900466A1 - Salt bath for descaling metals, especially iron and iron alloys - Google Patents
Salt bath for descaling metals, especially iron and iron alloysInfo
- Publication number
- DE1900466A1 DE1900466A1 DE19691900466 DE1900466A DE1900466A1 DE 1900466 A1 DE1900466 A1 DE 1900466A1 DE 19691900466 DE19691900466 DE 19691900466 DE 1900466 A DE1900466 A DE 1900466A DE 1900466 A1 DE1900466 A1 DE 1900466A1
- Authority
- DE
- Germany
- Prior art keywords
- iron
- salt bath
- metals
- descaling
- nitrate
- 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
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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/28—Cleaning or pickling metallic material with solutions or molten salts with molten salts
Description
PafentanwültePafentanwülte
6 Frci-.k'uit α. M.
Mi;ielweg 126 Frci-.k'uit α. M.
Wed; ielweg 12
KOLENE Corporation 12b9O, Westwood Avenue, Detroit] Michigan 4Ö223, U.S.A.KOLENE Corporation 12b90, Westwood Avenue, Detroit] Michigan 40223, U.S.A.
Salzbad zur Entzunderung von Metallen, insbesondere von EisenSalt bath for descaling metals, especially iron
und Eisenlegierungen.and iron alloys.
Die Erfindung bezieht sich auf ein Salzbad, das zur Entzunderung von Metallen, insbesondere von Eisen und Eisenlegierungen, bestimmt ist.The invention relates to a salt bath intended for descaling metals, in particular iron and iron alloys is.
i)ei der Bearbeitung von Werkstücken aus derartigen Metallen ist es häufig notwendig, das Material zwischen den einzelnen Bec.rbeitungsvorgängen zu erhitzen. Diese Wärmebehandlungen werden häufig in einer oxydierenden Atmosphäre durchgeführt, wodurch sich eine Oxidschicht an der Oberfläche der Metalle bildet. In den meisten Fällen ist es notwendig, diese Oxidschicht von der Metalloberfläche zu entfernen.i) ei is the processing of workpieces made of such metals it is often necessary to change the material between the individual Bec.rbeitungsvorgangs to heat. These heat treatments are often carried out in an oxidizing atmosphere, whereby an oxide layer forms on the surface of the metals. In most cases it is necessary to remove this oxide layer from the Remove metal surface.
Ds ist bekannt, die Entfernung der Oxidschichten in einem sauren Medium durchzuführen. In manchen Fällen ist es jeodch schwierig oder unmöglich, durch eine derartige Säurebehandlung die Oxidrfchicht zu' entfernen oder die Zeit ist zu lang, um diese Säurebehandlung durchzuführen.It is known that the oxide layers can be removed in an acidic medium. In some cases, however, it is difficult or impossible to remove the oxide layer by such an acid treatment to 'remove or the time is too long to do this acid treatment.
i-js sind verschiedene Vorschläge bekannt, um die Entzunderung bei uerartigen Metallen durchzuführen. Beispielsweise sind Behandlungsverfahren bekannt, wie sie auch in den amerikanischen Λι-enten 3 321 026 und 3 254 011 beschrieben sind. Diese Patente beziehen sich auf wässrige Lösungen, die aus einem Gemisch von Kaliumhydroxid und Kaliumnitrat bestehen. In diesen Patenten wird weiterhin angegeben, dass diese Salze geeignet sind, Titan i.ml rostfreien Stahl zu behandeln. Diese wässrigen Lösungen von kaliumhydroxid und Kaliumnitrat sind jedoch in gewissenVarious proposals are known to i-js to carry out descaling of extraneous metals. For example, treatment methods are known as they are also described in the American Λι-ducks 3,321,026 and 3,254,011. These patents relate to aqueous solutions composed of a mixture of potassium hydroxide and potassium nitrate. These patents also state that these salts are useful for treating titanium in stainless steel. However, these aqueous solutions of potassium hydroxide and potassium nitrate are in certain
- 2 909835/1268 - 2 909835/1268
Fällen nicht anwendbar, da sie das Metall selbst angreifen.Not applicable in cases as they attack the metal itself.
Vorliegende Erfindung verbessert derartige Bäder dadurch, dass nicht die reinen Salze verwendet werden, sondern solche Salze, die Hydratwasser enthalten.The present invention improves such baths in that it is not the pure salts that are used, but such Salts that contain water of hydration.
Die Erfindung bezieht sich insbesondere auf Bäder mit einer wässrigen Lösung von Kaliumhydroxid und Kaliumnitrat, die Verwendung finden zur Desoxydierung von Titan, r&stfreiem Stahl und anderen Metallen, bei denen es schwierig ist, die fe Oxidschicht von der Oberfläche zu entfernen. Vorzugsweise werden Gehalte zwischen 5 und 30 % Kaliumnitrat eingesetzt.The invention relates in particular to baths with an aqueous solution of potassium hydroxide and potassium nitrate which are used for deoxidizing titanium, stainless steel and other metals from which it is difficult to remove the fine oxide layer from the surface. Contents between 5 and 30 % potassium nitrate are preferably used.
Die Herstellung dieses Mischsalzes erfolgt in der Weise, dass Xaliumhydroxid, Kaliumnitrat und eine gewisse Wassermenge über dem Temperaturpunkt erhitzt werden, bei dem sie schmelzen. Sie werden für eine gewisse Zeit auf dieser Temperatur gehalten, damit eine einwandfreie Mischung zwischen diesen Grundstoffen erreicht wird. Der Anteil von Wasser in der Mischung ist abhängig von der Zeit und der Temperatur, je höher die Temperatur und je länger die Zeit andauern, je . weniger Wasser verbleibt in diesem Salzgemisch.The production of this mixed salt takes place in such a way that xalium hydroxide, potassium nitrate and a certain amount of water are heated above the temperature point at which they melt. They are kept at this temperature for a certain period of time so that a perfect mix between these basic substances is achieved. The proportion of water in the mixture depends on the time and the temperature, the higher the temperature and the longer the time. less water remains in this salt mixture.
" Wenn diese Mischung die gewünschte Zusammensetzung erreicht hat, wird sie gekühlt, wobei sich eine einheitliche Mischung von Kaliumhydroxid, Kaliumnitrat und Wasser ergibt. Dieses Produkt besitzt die Form von Flocken."When this mixture has reached the desired composition, it is cooled, resulting in a uniform mixture of potassium hydroxide, potassium nitrate and water. This product is in the form of flakes.
909835/1268909835/1268
Claims (3)
Schn/Bi2.I.1969
Schn / Bi
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US69934268A | 1968-01-22 | 1968-01-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1900466A1 true DE1900466A1 (en) | 1969-08-28 |
Family
ID=24808906
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19691900466 Pending DE1900466A1 (en) | 1968-01-22 | 1969-01-07 | Salt bath for descaling metals, especially iron and iron alloys |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US3625900A (en) |
| AT (1) | AT294522B (en) |
| BE (1) | BE727215A (en) |
| DE (1) | DE1900466A1 (en) |
| FR (1) | FR2000554A1 (en) |
| GB (1) | GB1195815A (en) |
| SE (1) | SE358424B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3873280A (en) * | 1972-08-22 | 1975-03-25 | Merit Abrasive Prod | Descaling of steel strip |
| US4012299A (en) * | 1976-04-01 | 1977-03-15 | Allegheny Ludlum Industries, Inc. | Metallic descaling system |
| US5272798A (en) * | 1992-08-05 | 1993-12-28 | Kolene Corporation | Method and apparatus for descaling metal strip |
| US6475289B2 (en) * | 2000-12-19 | 2002-11-05 | Howmet Research Corporation | Cleaning of internal passages of airfoils |
| US6953146B2 (en) * | 2002-10-24 | 2005-10-11 | Leonard Nanis | Low-temperature flux for soldering nickel-titanium alloys and other metals |
| MX2018000797A (en) * | 2015-07-22 | 2018-05-15 | Kolene Corp | Scale conditioning process for advanced high strength carbon steel alloys. |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| LU28268A1 (en) * | 1941-04-23 | |||
| US2671717A (en) * | 1950-08-29 | 1954-03-09 | Gen Electric | Chemical brightening of aluminum |
| US2935428A (en) * | 1954-03-30 | 1960-05-03 | Callery Chemical Co | Method and composition for subjecting metals to reducing conditions |
| US3121026A (en) * | 1960-07-15 | 1964-02-11 | Titanium Metals Corp | Descaling metals and alloys with aqueous potassium hydroxide at relatively low temperature |
| US3254011A (en) * | 1963-09-20 | 1966-05-31 | Allegheny Ludlum Steel | Electrolytic potassium hydroxide descaling |
| US3467549A (en) * | 1965-03-30 | 1969-09-16 | Allegheny Ludlum Steel | Descaling of alloys by high temperature surface vaporization |
-
1968
- 1968-01-22 US US699342A patent/US3625900A/en not_active Expired - Lifetime
- 1968-12-30 SE SE17969/68A patent/SE358424B/xx unknown
-
1969
- 1969-01-07 DE DE19691900466 patent/DE1900466A1/en active Pending
- 1969-01-20 GB GB3055/69A patent/GB1195815A/en not_active Expired
- 1969-01-21 BE BE727215D patent/BE727215A/xx unknown
- 1969-01-21 AT AT62669A patent/AT294522B/en not_active IP Right Cessation
- 1969-01-22 FR FR6901128A patent/FR2000554A1/fr not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| SE358424B (en) | 1973-07-30 |
| AT294522B (en) | 1971-11-25 |
| US3625900A (en) | 1971-12-07 |
| GB1195815A (en) | 1970-06-24 |
| BE727215A (en) | 1969-07-01 |
| FR2000554A1 (en) | 1969-09-12 |
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