DE1914759A1 - Hot alkaline baths - Google Patents
Hot alkaline bathsInfo
- Publication number
- DE1914759A1 DE1914759A1 DE19691914759 DE1914759A DE1914759A1 DE 1914759 A1 DE1914759 A1 DE 1914759A1 DE 19691914759 DE19691914759 DE 19691914759 DE 1914759 A DE1914759 A DE 1914759A DE 1914759 A1 DE1914759 A1 DE 1914759A1
- Authority
- DE
- Germany
- Prior art keywords
- bath
- baths
- contain
- wetting agents
- alkaline
- 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
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 24
- 239000000080 wetting agent Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 13
- 229910052751 metal Inorganic materials 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 10
- 239000007800 oxidant agent Substances 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 8
- -1 chlorinated alkyl sulfonic acids Chemical class 0.000 claims description 5
- 238000005554 pickling Methods 0.000 claims description 5
- 150000002739 metals Chemical class 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 4
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 3
- 239000003513 alkali Substances 0.000 claims description 3
- 238000009835 boiling Methods 0.000 claims description 3
- 125000004432 carbon atom Chemical group C* 0.000 claims description 3
- 150000004649 carbonic acid derivatives Chemical class 0.000 claims description 3
- 229910000464 lead oxide Inorganic materials 0.000 claims description 3
- 150000002823 nitrates Chemical class 0.000 claims description 3
- 229910052700 potassium Inorganic materials 0.000 claims description 3
- 239000011591 potassium Substances 0.000 claims description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 2
- 150000001735 carboxylic acids Chemical class 0.000 claims description 2
- 230000001590 oxidative effect Effects 0.000 claims description 2
- 229910052708 sodium Inorganic materials 0.000 claims description 2
- 239000011734 sodium Substances 0.000 claims description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims 2
- 239000011575 calcium Substances 0.000 claims 2
- 229910052791 calcium Inorganic materials 0.000 claims 2
- HTUMBQDCCIXGCV-UHFFFAOYSA-N lead oxide Chemical compound [O-2].[Pb+2] HTUMBQDCCIXGCV-UHFFFAOYSA-N 0.000 claims 2
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 claims 1
- 238000007598 dipping method Methods 0.000 claims 1
- 150000002826 nitrites Chemical class 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 235000010344 sodium nitrate Nutrition 0.000 description 2
- 239000004317 sodium nitrate Substances 0.000 description 2
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 2
- 150000003460 sulfonic acids Chemical class 0.000 description 2
- TUSDEZXZIZRFGC-UHFFFAOYSA-N 1-O-galloyl-3,6-(R)-HHDP-beta-D-glucose Natural products OC1C(O2)COC(=O)C3=CC(O)=C(O)C(O)=C3C3=C(O)C(O)=C(O)C=C3C(=O)OC1C(O)C2OC(=O)C1=CC(O)=C(O)C(O)=C1 TUSDEZXZIZRFGC-UHFFFAOYSA-N 0.000 description 1
- XTEGARKTQYYJKE-UHFFFAOYSA-M Chlorate Chemical class [O-]Cl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-M 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 239000001263 FEMA 3042 Substances 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- LRBQNJMCXXYXIU-PPKXGCFTSA-N Penta-digallate-beta-D-glucose Natural products OC1=C(O)C(O)=CC(C(=O)OC=2C(=C(O)C=C(C=2)C(=O)OC[C@@H]2[C@H]([C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)O2)OC(=O)C=2C=C(OC(=O)C=3C=C(O)C(O)=C(O)C=3)C(O)=C(O)C=2)O)=C1 LRBQNJMCXXYXIU-PPKXGCFTSA-N 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 150000007933 aliphatic carboxylic acids Chemical class 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 150000004653 carbonic acids Chemical class 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000013065 commercial product Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- ORTFAQDWJHRMNX-UHFFFAOYSA-N hydroxidooxidocarbon(.) Chemical compound O[C]=O ORTFAQDWJHRMNX-UHFFFAOYSA-N 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 150000002696 manganese Chemical class 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- YEXPOXQUZXUXJW-UHFFFAOYSA-N oxolead Chemical compound [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 description 1
- SNGREZUHAYWORS-UHFFFAOYSA-N perfluorooctanoic acid Chemical compound OC(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F SNGREZUHAYWORS-UHFFFAOYSA-N 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 239000012286 potassium permanganate Substances 0.000 description 1
- 235000010288 sodium nitrite Nutrition 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- LRBQNJMCXXYXIU-NRMVVENXSA-N tannic acid Chemical compound OC1=C(O)C(O)=CC(C(=O)OC=2C(=C(O)C=C(C=2)C(=O)OC[C@@H]2[C@H]([C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)O2)OC(=O)C=2C=C(OC(=O)C=3C=C(O)C(O)=C(O)C=3)C(O)=C(O)C=2)O)=C1 LRBQNJMCXXYXIU-NRMVVENXSA-N 0.000 description 1
- 229940033123 tannic acid Drugs 0.000 description 1
- 235000015523 tannic acid Nutrition 0.000 description 1
- 229920002258 tannic acid Polymers 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
- 150000004764 thiosulfuric acid derivatives Chemical class 0.000 description 1
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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/60—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using alkaline aqueous solutions with pH greater than 8
- C23C22/62—Treatment of iron or alloys based thereon
Landscapes
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- ing And Chemical Polishing (AREA)
- Chemical Treatment Of Metals (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Description
19147531914753
T 46 618T 46 618
■ Dr· Heinz W« Dettner, 565 Solingen 1, Beckmannstraße 40■ Dr Heinz W Dettner, 565 Solingen 1, Beckmannstrasse 40
Heiße alkalische BäderHot alkaline baths
Die vorliegende Erfindung betrifft heiße alkalische Bäder mit Temperaturen über 70° G sowie ein Verfahren zum Beizen von Metallen durch Eintauchen der Metallgegenstände in solche Bäder.The present invention relates to hot alkaline baths with temperatures above 70 ° G and a method for pickling of metals by immersing the metal objects in such baths.
Die Verwendung von heißen alkalischen Bädern ist auf verschiedenen technischen Gebieten bekannt. Von großer Bedeutung ist die Verwendung derartiger Bäder als sogenannte Brünierbäder zum Beizen von Metallen, insbesondere Eisen und Stahl. Die hierfür verwendeten Brünierbäder enthalten in der Regel etwa 500 bis 700 g Natriumhydroxid pro Liter sowie Oxydationsmittel. Beim Eintauchen der kalten Metallgegenstände in diese heißen stark alkalischen Bäder tritt ein Verspritzen der Badflüssigkei ein. Dies ist eine erhebliche Gefahrensquelle für Mensch und Material.The use of hot alkaline baths is different technical areas known. The use of such baths as so-called burnishing baths is of great importance for pickling metals, especially iron and steel. The burnishing baths used for this usually contain about 500 to 700 g sodium hydroxide per liter and oxidizing agent. When the cold metal objects are immersed in them, they are hot In strongly alkaline baths, the bath liquid splashes. This is a significant source of danger for humans and Material.
Der vorliegenden Erfindung liegt die Aufgabenstellung zugrunde, diese Nachteile zu vermeiden und heiße alkalische Bäder zu ■ finden, die ohne Nebenwirkungen und technische Schwierigkeiten angewandt werden können, ohne die sonstigen guten Eigenschaften zu verlieren· Es wurde überraschenderweise gefunden, daß diese Aufgabenstellung gelöst werden kann, wenn- den heißen alkalischen Bädern gewisse organische Netzmittel, die nachfolgend im einzelnen definiert sind, zugesetzt werden.The present invention is based on the object to avoid these disadvantages and to use hot alkaline baths find that can be used without side effects and technical difficulties, without the other good properties to lose It has surprisingly been found that this problem can be achieved if the hot alkaline baths contain certain organic wetting agents, the following are defined in detail, are added.
Gegenstand der vorliegenden Erfindung sind demgemäß heiße alkalische Bäder mit Temperaturen über 70° G, deren Gehalt '^2-The present invention accordingly relates to hot alkaline baths with temperatures above 70 ° G, the content of which '^ 2 -
009840/20009840/20
1 ei 1 4 7 π; q1 ei 1 4 7 π; q
an alkalischen Stoffen über 500 g/l liegt, und die gegebenen^· falls oxydierende Mittel enthalten, dadurch ge- ' kennzeichnet, daß sie mindestens 0.01 g/l des" fertigen Bades an einem oder mehreren fluorierten und/oder chlorierten organischen Netzmitteln enthalten. . "of alkaline substances is above 500 g / l, and the given ^ if they contain oxidizing agents, indicates that it contains at least 0.01 g / l of the " finished bath containing one or more fluorinated and / or chlorinated organic wetting agents. . "
Weiterhin ist Gegenstand der vorliegenden Erfindung ein Verfahren zum Beizen von Metallen durch Eintauchen der Metallgegenstände in ein alkalisches Bad von einer Temperatur über 70 C mit einem Gehalt von mehr als 500 g/l an alkalischen Stoffen, sowie gegebenenfalls einen Gehalt an oxydierenden Stoffen. Das Verfahren ist dadurch gekennzeichnet, daß das Bad mindestens 0.01 g/l des fertigen Bades an einem oder mehreren fluorierten und/oder chlorierten organischen Netzmitteln enthält.The present invention also relates to a method for pickling metals by immersing the metal objects in an alkaline bath at a temperature above 70 C with an alkaline content of more than 500 g / l Substances, as well as possibly a content of oxidizing Fabrics. The method is characterized in that the bath at least 0.01 g / l of the finished bath on one or contains several fluorinated and / or chlorinated organic wetting agents.
Bei seiner Anwendung wird das heiße alkalische Bad gemäß der vorliegenden Erfindung vorzugsweise auf Temperaturen zwischen 130 C und dem Siedepunkt des Bades erhitzt. Die damit zu behandelnden Gegenstände, insbesondere Metallgegenstände, können ohne vorheriges Erwärmen d.h. kalt in das heiße Bad einge- · taucht werden, ohne daß das sonst übliche und unangenehme Verspritzen des Bades eintritt. Insbesondere bevorzugt ist es, die Bäder gemäß der Erfindung zum-Beizen von Eisen und/oder Stahl zu verwenden. Es hat sich überraschenderweise herausgestellt, daß die Bäder gemäß der Erfindung auch eine Abkürzung der sonst üblichen Behandlungszeit in gewissen Fällen ermöglichen. ■-.-■-When used, the hot alkaline bath is used in accordance with present invention preferably to temperatures between 130 C and the boiling point of the bath. The ones to be treated with it Objects, especially metal objects, can be put into the hot bath without being heated beforehand, i.e. cold. be immersed without the otherwise common and unpleasant splashing of the bath occurs. It is particularly preferred the baths according to the invention for pickling iron and / or Use steel. It has surprisingly turned out that the baths according to the invention also enable the otherwise customary treatment time to be shortened in certain cases. ■ -.- ■ -
Als alkalische Stoffe enthalten die Bäder gemäß der Erfindung - s vorzugsweise Oxide und/oder Karbonate von Alkalien und/oder Erdalkalien, insbesondere von natrium, Kalium oder Ka/lzium. Ganz besonders bevorzugt wird Natriumhydroxid, da es eine ■ starke Ätzwirkung besitzt und leicht zugänglich "bzw. billig ist. Als Oxydationsmittel enthalten die Bäder» sofern dies fürSuitable alkaline substances, the baths according to the invention contain - s, preferably oxides and / or carbonates of alkali and / or alkaline earth metals, in particular sodium, potassium or Ka / lzium. Sodium hydroxide is particularly preferred because it has a strong corrosive effect and is easily accessible or cheap
-3-009840/2053-3-009840 / 2053
den jeweiligen Verwendungszweck erwünscht ist, zweckmäßig Alkalinitrite und/oder -nitrate. Auch Bleioxid, Kaliumpermanganat Chlorate oder Dichromate können als Oxydationsmittel je nach dem Verwendungszweck des Bades vorteilhaft eingesetzt werden. Eine weitere Verbesserung des Bades kann unter Umständen durch Zusat von Harnstoff (5-20 g/l) oder Gerbsäure (5 g/l) erreicht werdenthe intended use is desired, preferably alkali metal nitrites and / or nitrates. Also lead oxide, potassium permanganate chlorates or dichromates can be used as oxidizing agents depending on the Purpose of the bath can be used advantageously. A further improvement of the bath can possibly by adding urea (5-20 g / l) or tannic acid (5 g / l) can be achieved
Der Gehalt an Alkalien liegt,wie bereits ausgeführt,über 500 g/ 1. Zweckmäßig enthalten die Bäder etwa 500 bis 750 g NaOH oder eine äquivalente Menge anderer Alkalien pro Liter. Der Gehalt an den Hetzmitteln gemäß der Erfindung liegt zweckmäßig zwischen 0.1 und 10, vorteilhaft zwischen 0·1 und 1 g/l des fertigen Bades.As already stated, the alkaline content is over 500 g / 1. Appropriately, the baths contain about 500 to 750 g or NaOH an equivalent amount of other alkalis per liter. The content of the inhibiting agents according to the invention is expediently between 0.1 and 10, advantageously between 0.1 and 1 g / l of the finished bath.
Wie bereits ausgeführt, werden als Netzmittel gemäß der vorliegenden Erfindung fluorierte und/oder chlorierte organische Verbindungen verwendet. Derartige Verbindungen sind insbesondere Karbon— und Sulfonsäuren mit einem hohen Fluor- bzw. Chlorgehalt. Besonders bevorzugt sind die perfluorierten und/ oder chlorierten Alkylsulfon- und/oder'-carbonsäuren, die zweckmäßigerweise 3 bis 12, vorzugsweise etwa 5 bis 10 Kohlenstoffatome in der Alkylkette enthalten. Es können jedoch auch Verbindungen eingesetzt werden, die nicht vollständig fluoriert und/oder chloriert sind. In den heißen alkalischen Bädern werden die Säuren naturgemäß neutralisiert. Es ist deshalb auch möglich, von vornherein die Salze der'-Sulfon- und/oder Karbonsäuren zuzusetzen. Netzmittel, wie sie gemäß der vorliegenden Erfindung eingesetzt werden, sind bekannt und im Handel erhältlich. In diesem Zusammenhang wird beispielsweise verwiesen auf die USA-Patentschriften 2 750 334-, 2 750 335, 2 750 336, 2 750 337, 2 846 380, und DBP 1 128 170. Ganz besonders gute Ergebnisse sind mit dein von der Minnesota Mining & Manufacturing Co. MBH in den Handel gebrachten fluorierten Netzmittel PC-98 erhalten worden. Dieses Netzmittel enthält perfluoralkylsulfonsaure Salze.As already stated, fluorinated and / or chlorinated organic compounds are used as wetting agents according to the present invention. Such compounds are in particular carbonic and sulfonic acids with a high fluorine or chlorine content. The perfluorinated and / or chlorinated alkylsulfonic and / or'-carboxylic acids, which advantageously contain 3 to 12, preferably about 5 to 10, carbon atoms in the alkyl chain are particularly preferred. However, it is also possible to use compounds which are not completely fluorinated and / or chlorinated. The acids are naturally neutralized in the hot alkaline baths. It is therefore also possible to add the salts of the sulfonic and / or carboxylic acids from the outset. Wetting agents as used in accordance with the present invention are known and are commercially available. In this context, reference is made, for example, to US patents 2,750,334-, 2,750,335, 2,750,336, 2,750,337, 2,846,380, and DBP 1,128,170. Particularly good results have been achieved with the Minnesota Mining & Co. Manufacturing Co. MBH commercially available fluorinated surfactant PC-98. This wetting agent contains perfluoroalkylsulfonic acid salts.
Anhand der folgenden Beispiele wird die Erfindung weiter erläutert sThe invention is further illustrated by the following examples s
-4--4-
0098^0/2D530098 ^ 0 / 2D53
original inspectedoriginal inspected
■ _ 4 -■ _ 4 -
In 1 1 Wasser werden gelöst: 600 g Natriumhydroxid 60 g Natriumnitrit 0.5 g perfluoralkylsulfonsaure Salze (FC-98)In 1 l of water are dissolved: 600 g of sodium hydroxide 60 g sodium nitrite 0.5 g perfluoroalkyl sulfonic acid salts (FC-98)
Dieses Bad wird auf 143° C erhitzt. Dann werden Stahlteile 5 bis 10 Minuten lang getaucht. Es wird ein sehr gleichmäßiger und schön gefärbter Überzug erhalten, ohne daß das sonst übliche Verspritzen beim Eintauchen eintreten würde.This bath is heated to 143 ° C. Then steel parts Submerged for 5 to 10 minutes. A very even and beautifully colored coating is obtained without the otherwise usual Splashing would occur when immersed.
In 1 1 Wasser werden gelöst» 700 g Natriumhydroxid 40 g NatriumnitratIn 1 liter of water, 700 g of sodium hydroxide and 40 g of sodium nitrate are dissolved
0.3 g einer Mischung von Ammoniumsalzen vollständig fluorierter aliphatischer Carbonsäuren, insbesondere Perfluorcaprylsäure ( Handelsprodukt FC-126 der Minnesota Mining & Manufacturing Co.)0.3 g of a mixture of ammonium salts of fully fluorinated aliphatic carboxylic acids, in particular Perfluorocaprylic acid (commercial product FC-126 from Minnesota Mining & Manufacturing Co.)
Das Bad wird auf 135° C erhitzt. In dieses Bad werden beliebige Metallteile eingetaucht, ohne daß ein Spritzen in nennenswertem Umfang erfolgt.The bath is heated to 135 ° C. Any metal parts can be immersed in this bath without any significant splashing Scope takes place.
In 1 1 Wasser werden gelöst: 750 g Kaliumhydroxid 0.03g der Verbindung der Formel CF5(CF2JIn 1 l of water are dissolved: 750 g of potassium hydroxide 0.03 g of the compound of the formula CF 5 (CF 2 J
Das auf z.B. 140° C erhitzte Bad kann wie die Bäder der vorhergehenden Beispiele verwendet werden.The bath heated to e.g. 140 ° C can be used like the previous baths Examples are used.
In 1 1 Wasser werden gelöst» 800 g Natriumkarbonat 90 g Natriumnitrat 0.02g der Verbindung der Formel Cl(CF2-CFCl)6.CFp.COOH800 g of sodium carbonate and 90 g of sodium nitrate 0.02 g of the compound of the formula Cl (CF 2 -CFCl) 6 .CFp.COOH are dissolved in 1 liter of water
-5-0098A0/2053-5-0098A0 / 2053
Das Bad kann in gleicher Weise wie die Bäder der anderen Beispiele verwendet werden.The bath can be used in the same way as the baths of the other examples be used.
Die Bäder gemäß der Erfindung können, falls gewünscht, noch sonstige Zusätze enthalten. Beispiele für derartige Zusätze sind Phosphate, Sulfide, Thiosulfate bzw. Mangansalze. Dies gilt insbesondere dann, wenn die Bäder gemäß der Erfindung als Brünierbäder für Stahl und Eisen verwendet werden.The baths according to the invention can, if desired, still contain other additives. Examples of such additives are phosphates, sulfides, thiosulfates and manganese salts. this applies in particular when the baths according to the invention as Burnishing baths can be used for steel and iron.
QQ 9 8 A 0/2.0 S 3QQ 9 8 A 0 / 2.0 S 3
ORiGfNAL INSPECTEDORiGfNAL INSPECTED
Claims (20)
liegt.2. Baths according to claim 1, characterized in that their temper
lies.
Metallgegenstände in ein alkalisches Bad von einer !Temperatur über 70° G mit einem Gehalt von mehr als 500 g/l an alkalischen Stoffen, sowie gegebenenfalls einem Gehalt an oxydierenden Stoffen, dadurch gekennzeichnet, daß das Bad mindestens 0.01 g/l des fertigen Bades an einem oder
mehreren fluorierten und/oder chlorierten organischen Netzmitteln enthält.11. Method of pickling metals by dipping the
Metal objects in an alkaline bath at a temperature above 70 ° G with a content of more than 500 g / l of alkaline substances, and optionally a content of oxidizing substances, characterized in that the bath contains at least 0.01 g / l of the finished bath one or
contains several fluorinated and / or chlorinated organic wetting agents.
die Temperati
punkt liegt.12. The method according to claim 11, characterized in that
the temperati
point lies.
Carbonate von Alkalien und/oder Erdalkalien, insbesondere liatrium, Kalium und/oder Kalzium enthält.13 · Process according to Claims 11-12, characterized in that the bath contains the oxides and / or as alkaline substances
Contains carbonates of alkalis and / or alkaline earths, in particular liatrium, potassium and / or calcium.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19691914759 DE1914759A1 (en) | 1969-03-22 | 1969-03-22 | Hot alkaline baths |
| GB1264595D GB1264595A (en) | 1969-03-22 | 1970-03-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19691914759 DE1914759A1 (en) | 1969-03-22 | 1969-03-22 | Hot alkaline baths |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1914759A1 true DE1914759A1 (en) | 1970-10-01 |
Family
ID=5729042
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19691914759 Pending DE1914759A1 (en) | 1969-03-22 | 1969-03-22 | Hot alkaline baths |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE1914759A1 (en) |
| GB (1) | GB1264595A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4004914A1 (en) * | 1990-02-16 | 1991-08-22 | Zwez Chemie Gmbh | USE OF BRUENIER BATH SLUDGE |
| US5244000A (en) * | 1991-11-13 | 1993-09-14 | Hughes Aircraft Company | Method and system for removing contaminants |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5357142A (en) * | 1976-11-05 | 1978-05-24 | Nippon Packaging Kk | Process for forming black coating on aluminum or aluminum alloy |
-
1969
- 1969-03-22 DE DE19691914759 patent/DE1914759A1/en active Pending
-
1970
- 1970-03-20 GB GB1264595D patent/GB1264595A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4004914A1 (en) * | 1990-02-16 | 1991-08-22 | Zwez Chemie Gmbh | USE OF BRUENIER BATH SLUDGE |
| US5244000A (en) * | 1991-11-13 | 1993-09-14 | Hughes Aircraft Company | Method and system for removing contaminants |
Also Published As
| Publication number | Publication date |
|---|---|
| GB1264595A (en) | 1972-02-23 |
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