DE747301C - Manufacture of items that require high resistance to attack by hydrochloric or sulfuric acid at elevated temperatures, with the exception of boiling sulfuric acid - Google Patents
Manufacture of items that require high resistance to attack by hydrochloric or sulfuric acid at elevated temperatures, with the exception of boiling sulfuric acidInfo
- Publication number
- DE747301C DE747301C DEK143006D DEK0143006D DE747301C DE 747301 C DE747301 C DE 747301C DE K143006 D DEK143006 D DE K143006D DE K0143006 D DEK0143006 D DE K0143006D DE 747301 C DE747301 C DE 747301C
- Authority
- DE
- Germany
- Prior art keywords
- sulfuric acid
- manufacture
- attack
- hydrochloric
- exception
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- 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
- C23F15/00—Other methods of preventing corrosion or incrustation
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Description
Herstellung von Gegenständen, die eine hohe Widerstandsfähigkeit gegen den Angriff von Salz- oder Schwefelsäure bei erhöhter Temperatur, ausgenommen siedende Schwefelsäure, erfordern Die vorliegende Erfindung bezieht sich auf die Herstellung von Gegenständen (z. B. Gefäßen, Rohren, Maschinenteilen usw.), die eine hohe Widerstandsfähigkeit gegen den Angriff von Salz- oder Schwefelsäure oder deren Lösungen bei erhöhter Temperatur bis zu I2o° C, ausgenommen siedende Schwefelsäure, erfordern. Diese Gegenstände werden erfindungsgemäß aus Eisen- oder Stahllegierungen hergestellt, die etwa g bis 2o °p Chrom, I2 bis 24%Nickel, bis I % Kohlenstoff, I bis 12 °/o Kupfer und gleichzeitig o,5 bis Io % Molybdän enthalten.Manufacture of items that are highly resistant to attack by hydrochloric or sulfuric acid at elevated temperatures, with the exception of boiling ones Sulfuric acid, require The present invention relates to manufacturing of objects (e.g. vessels, pipes, machine parts, etc.) that have a high level of resistance against the attack of hydrochloric or sulfuric acid or their solutions at increased Temperature up to I2o ° C, except for boiling sulfuric acid, require. These items are made according to the invention from iron or steel alloys, which have about g up to 20 ° p chromium, I2 up to 24% nickel, up to 1% carbon, 1 up to 12 ° / o copper and at the same time contain 0.5 to 10% molybdenum.
Es sind bereits Gegenstände aus Chromnickelstahllegierungen bekannt, die eine hohe Korrosionsbeständigkeit besitzen. Diese Legierungen bzw. die daraus hergestellten Gegenstände sind jedoch insbesondere dann nicht in zufriedenstellender Weise beständig, wenn es sich um den Angriff von Salz- oder Schwefelsäure oder deren Lösungen bei erhöhter Temperatur handelt. Wie eingehende Versuche ergeben haben, erlangen Chromnickelstahllegierungen mit ä bis 2o % Chrom, Iz bis 24 °% Nickel und bis I % Kohlenstoff erst durch einen Zusatz von I bis I2 % Kupfer und o,5 bis Io °% 2Molybdän eine besonders hohe Widerstandsfähigkeit gegen den Angriff von Salz- oder Schwefelsäure oder deren Lösungen bei erhöhter Temperatur und weisen daneben besonders gute Festigkeitseigenschaften auf. Besonders gute Ergebnisse werden beispielsweise mit Legierungen erzielt, die etwa 8 bis I,5 % Chrom, I6 bis 22 % Nickel, 0,05 bis o,4o °/o Kohlenstoff, 2 bis 5 °/0 Kupfer und I bis 5 °/o Molybdän enthalten.There are already objects made of chrome-nickel steel alloys known, which have a high resistance to corrosion. These alloys or those from them However, manufactured articles are not particularly satisfactory Way resistant when it comes to attack by hydrochloric or sulfuric acid or theirs Solutions at elevated temperature acts. As detailed tests have shown, obtain chromium-nickel steel alloys with up to 2o% chromium, Iz up to 24 °% nickel and up to 1% carbon only through the addition of 1 to 12% copper and 0.5 to 10% °% 2Molybdenum has a particularly high resistance to attack by salt or sulfuric acid or its solutions at elevated temperature and have next to it particularly good strength properties. For example, particularly good results will be achieved with alloys containing about 8 to 1.5% chromium, 16 to 22% nickel, 0.05 to Contains o.4o per cent carbon, 2 to 5 per cent copper and 1 to 5 per cent molybdenum.
Gleich gute Ergebnisse werden erreicht, wenn das Nickel ganz oder teilweise durch Kobalt ersetzt wird. Günstig wirken sich ferner eigenschaftsverbessernde Zusätze von Silizium, Titan, Vanadium. Zirkon. Silber, Tantal und Niob in Mengen von etwa o,I bis 6 °/o einzeln oder gemischt aus.Equally good results are achieved if the nickel is whole or is partially replaced by cobalt. Property-improving properties also have a beneficial effect Additions of silicon, titanium, vanadium. Zircon. Silver, tantalum and niobium in abundance from about 0.1 to 6% individually or mixed.
Durch eine Erhitzung auf etwa iooo bis 1300° C und anschließende Abkühlung beispielsweise in Wasser, Ö1 oder Luft erhalten die fraglichen Legierungen besonders gute niechanischeEigenschaften, z. B. große Zähigkeit und Bearbeitbarleit. Auch wird die chemische Beständigkeit durch diese Wiirmelbehandlungnoch weiter verbessert.By heating it to around 1000 to 1300 ° C and then cooling it down The alloys in question are particularly preserved in water, oil or air, for example good mechanical properties, e.g. B. great toughness and machinability. Even becomes the chemical Resistance due to this Wiirmel treatment further improved.
Es ist bereits torgeschlagen worden - dieser Vorschlag gehtört-jedoch nicht zun Stand der Technik -, Gegenstände, die bogen einen Angriff durch siedende Schwefelsäure bestäindig sein sollen. aus Stahllegierungen mit i25 bis 25% ° Chrom, I2.5 bis i 7 % Nickel, h4 zu o,5 %i Kohlenstoff, I,d his 4% Kupfer und l I.2 bis Io % Molybdä n anzufertigen. D Herstellung solcher Gegenstände gehört nicht zurre Gegenstand der vorliegenden Erfindung.It has already been beaten - but this suggestion will not work not prior art, objects that bent an attack by boiling Sulfuric acid should be resistant. made of steel alloys with i25 to 25% ° chrome, I2.5 to i 7% nickel, h4 to 0.5% i carbon, I, d to 4% copper and l I.2 to Io% molybdenum. D The production of such items is not part of the deal Subject of the present invention.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEK143006D DE747301C (en) | 1936-07-19 | 1936-07-19 | Manufacture of items that require high resistance to attack by hydrochloric or sulfuric acid at elevated temperatures, with the exception of boiling sulfuric acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEK143006D DE747301C (en) | 1936-07-19 | 1936-07-19 | Manufacture of items that require high resistance to attack by hydrochloric or sulfuric acid at elevated temperatures, with the exception of boiling sulfuric acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE747301C true DE747301C (en) | 1944-11-23 |
Family
ID=7250309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEK143006D Expired DE747301C (en) | 1936-07-19 | 1936-07-19 | Manufacture of items that require high resistance to attack by hydrochloric or sulfuric acid at elevated temperatures, with the exception of boiling sulfuric acid |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE747301C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3720055A1 (en) * | 1986-07-03 | 1988-01-07 | Haynes Int Inc | CORROSION-RESISTANT AND WEAR-RESISTANT STEEL |
| DE3901028A1 (en) * | 1989-01-14 | 1990-07-19 | Bayer Ag | NON-RESISTANT MOLDING AND CASTING MATERIALS AND WELDING ADDITIVES FOR BUILDING COMPONENTS ASSOCIATED WITH HOT, CONCENTRATED SWISS ACIDS |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB313471A (en) * | 1928-03-10 | 1929-06-10 | Robert Abbott Hadfield | Improvements in or relating to alloys |
| FR688359A (en) * | 1929-01-22 | 1930-08-22 | Int Nickel Co | Improvements to iron, chromium and nickel alloys |
| FR784293A (en) * | 1934-01-20 | 1935-07-22 | Alloy Res Corp | Advanced ferrous alloy |
-
1936
- 1936-07-19 DE DEK143006D patent/DE747301C/en not_active Expired
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB313471A (en) * | 1928-03-10 | 1929-06-10 | Robert Abbott Hadfield | Improvements in or relating to alloys |
| FR688359A (en) * | 1929-01-22 | 1930-08-22 | Int Nickel Co | Improvements to iron, chromium and nickel alloys |
| FR784293A (en) * | 1934-01-20 | 1935-07-22 | Alloy Res Corp | Advanced ferrous alloy |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3720055A1 (en) * | 1986-07-03 | 1988-01-07 | Haynes Int Inc | CORROSION-RESISTANT AND WEAR-RESISTANT STEEL |
| DE3901028A1 (en) * | 1989-01-14 | 1990-07-19 | Bayer Ag | NON-RESISTANT MOLDING AND CASTING MATERIALS AND WELDING ADDITIVES FOR BUILDING COMPONENTS ASSOCIATED WITH HOT, CONCENTRATED SWISS ACIDS |
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