BE514580A - - Google Patents
Info
- Publication number
- BE514580A BE514580A BE514580DA BE514580A BE 514580 A BE514580 A BE 514580A BE 514580D A BE514580D A BE 514580DA BE 514580 A BE514580 A BE 514580A
- Authority
- BE
- Belgium
- Prior art keywords
- steel
- solutions
- steels
- proportion
- improved
- Prior art date
Links
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 5
- 239000011780 sodium chloride Substances 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 239000011651 chromium Substances 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 229910052750 molybdenum Inorganic materials 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 229910052758 niobium Inorganic materials 0.000 claims description 3
- 239000010955 niobium Substances 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 229910052715 tantalum Inorganic materials 0.000 claims description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 2
- 239000011733 molybdenum Substances 0.000 claims description 2
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims description 2
- 239000010703 silicon Substances 0.000 claims description 2
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims description 2
- OSVXSBDYLRYLIG-UHFFFAOYSA-N Chlorine dioxide Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 claims 2
- XTEGARKTQYYJKE-UHFFFAOYSA-N 7790-93-4 Chemical class OCl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-N 0.000 claims 1
- 239000004155 Chlorine dioxide Substances 0.000 claims 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims 1
- 150000001805 chlorine compounds Chemical class 0.000 claims 1
- 235000019398 chlorine dioxide Nutrition 0.000 claims 1
- 230000001131 transforming Effects 0.000 claims 1
- 229910000851 Alloy steel Inorganic materials 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- REDXJYDRNCIFBQ-UHFFFAOYSA-N aluminium(3+) Chemical class [Al+3] REDXJYDRNCIFBQ-UHFFFAOYSA-N 0.000 description 3
- BDAGIHXWWSANSR-UHFFFAOYSA-N formic acid Chemical compound OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 3
- 150000007513 acids Chemical class 0.000 description 2
- 231100000078 corrosive Toxicity 0.000 description 2
- 231100001010 corrosive Toxicity 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- -1 iron - nickel Chemical compound 0.000 description 2
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 2
- QBWCMBCROVPCKQ-UHFFFAOYSA-N Chlorous acid Chemical class OCl=O QBWCMBCROVPCKQ-UHFFFAOYSA-N 0.000 description 1
- UKLNMMHNWFDKNT-UHFFFAOYSA-M Sodium chlorite Chemical compound [Na+].[O-]Cl=O UKLNMMHNWFDKNT-UHFFFAOYSA-M 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 239000007795 chemical reaction product Chemical class 0.000 description 1
- 229940077239 chlorous acid Drugs 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 229910000529 magnetic ferrite Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 235000019362 perlite Nutrition 0.000 description 1
- 239000010451 perlite Substances 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 229960002218 sodium chlorite Drugs 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Description
<Desc/Clms Page number 1>
,ALLIER D'ACIER.
Pour fabriquer des objets qui sont exposés à une attaque cor- rosive d'acides, de lessives ou de solutions salines, on a jusqu'à présent utilisé des aciers résistant aux acides et contenant de la ferrite, de l'aus- ténite ou de la perlite; ces aciers étaient constitués sur la base fer - chro- me, fer - nickel, ou fer - chrome - nickel. Ces alliages d'acier connus résis- tent très bien, dans de nombreux cas d'utilisation, à une influence corro- sive de solutions ou de gaz; toutefois, dans des cas particuliers déterminés, ils se sont révélés totalement impropres.
Un cas particulier de ce genre se présente par exemple avec des solutions qui contiennent des sels d'acide chlo- reux ou des produits de réaction de ces sels, avec une valeur de pH inférieu- re à 7; il se présente aussi avec les atmosphères contenant des vapeurs de ces solutions., Par des recherches systématiques, il a été maintenant établi qu'un alliage d'acier avec environ 0,05 à 0,5 % de C, 25 à 32 %, éventuelle- ment 25 à 30 % de chrome et 3 à 7 % de molybdène, est particulièrement bien approprié et résistant à la corrosion pour la fabrication d'appareils qui viennent en contact avec de telles solutions.
La résistance à la corrosion de ce matériau peut être encore augmentée par une petite teneur en niobium et en tantale, dans la proportion de 0,3 à 1 % chacun, et aussi par une te- neur en silicium de 0,8 à 3 %, éventuellement de 1,1 à 2,5 %. De mme, en vue d'améliorer les propriétés mécaniques, une proportion de nickel jusqu'à 2 % peut être introduite dans le susdit alliage. Pour la fabrication d'objets qui sont exposés à l'attaque mentionnée ci-dessus, on peut utiliser l'allia- ge à l'état fondu ou forgé, trempé ou non trempé.
Un alliage avec 0,1 % de C, 1,2 % de Si, 29,4 % de Cr, 3,8 % de Mo, 1,8 % de Ni, 0,3 % de Nb et 0,3 % de Ta, n'a montré aucune attaque, par exemple après une durée d'essai de plus de 130 h. à 95 C dans des solutions qui étaient fraîchement préparées toutes les 24 heures et étaient dosées avec
<Desc/Clms Page number 2>
5 g. de chlorite de sodium (Na C1 O2) par litre d'eau, et additionnées d'acide nitrique, acétique ou formique à une valeur de pH de 4, et cela ni dans les solutions elles-mêmes, ni dans l'atmosphère contenant leurs va- peurs;
par contre, les alliages d'acier connus jusqu'ici comme résistant à la rouille et aux acides conduisaient à des échecs et étaient attaqués.
<Desc / Clms Page number 1>
, STEEL ALLOY.
To make articles which are exposed to corrosive attack by acids, lye or saline solutions, acid-resistant steels have heretofore been used which contain ferrite, austenite or acid. perlite; these steels were made on the basis of iron - chrome, iron - nickel, or iron - chromium - nickel. These known steel alloys resist very well, in many cases of use, to a corrosive influence of solutions or gases; however, in specific cases they have been shown to be totally unsuitable.
A special case of this kind arises, for example, with solutions which contain salts of chlorous acid or reaction products of these salts, with a pH value of less than 7; it also occurs with atmospheres containing vapors of these solutions., By systematic research it has now been established that a steel alloy with about 0.05 to 0.5% C, 25 to 32%, optionally 25 to 30% chromium and 3 to 7% molybdenum, is particularly well suited and corrosion resistant for the manufacture of devices which come into contact with such solutions.
The corrosion resistance of this material can be further increased by a small content of niobium and tantalum, in the proportion of 0.3 to 1% each, and also by a silicon content of 0.8 to 3%. , optionally from 1.1 to 2.5%. Likewise, in order to improve the mechanical properties, a proportion of nickel up to 2% can be introduced into the aforesaid alloy. For the manufacture of articles which are exposed to the attack mentioned above, the alloy may be used in the molten or forged, quenched or unhardened state.
An alloy with 0.1% C, 1.2% Si, 29.4% Cr, 3.8% Mo, 1.8% Ni, 0.3% Nb and 0.3% Ta, showed no attack, for example after a test duration of more than 130 h. at 95 ° C in solutions which were freshly prepared every 24 hours and were dosed with
<Desc / Clms Page number 2>
5 g. of sodium chlorite (Na C1 O2) per liter of water, and added with nitric, acetic or formic acid at a pH value of 4, and this neither in the solutions themselves, nor in the atmosphere containing their vapors;
on the other hand, steel alloys known so far as resistant to rust and acids led to failures and were attacked.
Claims (1)
Publications (1)
Publication Number | Publication Date |
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BE514580A true BE514580A (en) |
Family
ID=152357
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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Country Status (1)
Country | Link |
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BE (1) | BE514580A (en) |
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- BE BE514580D patent/BE514580A/fr unknown
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