DE272043C - - Google Patents
Info
- Publication number
- DE272043C DE272043C DENDAT272043D DE272043DA DE272043C DE 272043 C DE272043 C DE 272043C DE NDAT272043 D DENDAT272043 D DE NDAT272043D DE 272043D A DE272043D A DE 272043DA DE 272043 C DE272043 C DE 272043C
- Authority
- DE
- Germany
- Prior art keywords
- aluminum
- sodium hydroxide
- boiling
- bath
- borax
- 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.)
- Active
Links
- 229910052782 aluminium Inorganic materials 0.000 claims description 16
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminum Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 16
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 15
- 238000009835 boiling Methods 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 5
- 239000007864 aqueous solution Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 229940037003 alum Drugs 0.000 claims description 3
- 239000004328 sodium tetraborate Substances 0.000 claims description 3
- 235000010339 sodium tetraborate Nutrition 0.000 claims description 3
- GRYLNZFGIOXLOG-UHFFFAOYSA-N nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 2
- 239000011780 sodium chloride Substances 0.000 claims description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium monoxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims 2
- 239000000292 calcium oxide Substances 0.000 claims 1
- 235000012255 calcium oxide Nutrition 0.000 claims 1
- 150000003839 salts Chemical class 0.000 claims 1
- 239000000243 solution Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 235000011121 sodium hydroxide Nutrition 0.000 description 3
- 150000007524 organic acids Chemical class 0.000 description 2
- 235000005985 organic acids Nutrition 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 210000003298 Dental Enamel Anatomy 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N Sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 235000015450 Tilia cordata Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- PEDCQBHIVMGVHV-UHFFFAOYSA-N glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 235000021110 pickles Nutrition 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 235000002639 sodium chloride Nutrition 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F3/00—Electrolytic etching or polishing
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Description
KAISERLICHESIMPERIAL
PATENTAMT.PATENT OFFICE.
PATENTSCHRIFTPATENT LETTERING
- M 272043 KLASSE 40«. GRUPPE- M 272043 CLASS 40 «. GROUP
Die Erfindung betrifft ein Verfahren, um Aluminium gegen organische Säuren, gegen Witterungseinflüsse usw. widerstandsfähig zu machen und dessen Bieg- und Druckfestigkeit zu erhöhen. Es ist bereits bekannt, Aluminium mit einer heißen, mit Kochsalz gesättigten Natronlauge zu beizen. Das neue Verfahren besteht nun darin, daß man das Aluminium je nach Verwendungszweck roh oder verarbeitet in einer kochenden Mischung von wäßrigen Lösungen des Alauns, des Borax und des Natriumhydroxyds der Wirkung des elektrischen Stromes aussetzt. Das Verfahren kann z. B. in der Weise durchgeführt werden, daß man 250 g Alaun in 5 1 Wasser löst, diese wäßrige Lösung in kochendem Zustande mit einer ebenfalls kochenden Lösung von 750 g Borax in 5 1 Wasser mischt, wobei das Mischen unter stetem Umrühren stattfindet.The invention relates to a method to aluminum against organic acids, against To make weathering, etc. resistant and its flexural and compressive strength to increase. It is already known to treat aluminum with a hot, saturated with table salt To pickle caustic soda. The new process now consists in removing the aluminum Depending on the intended use, raw or processed in a boiling mixture of aqueous Solutions of alum, borax and sodium hydroxide of the effect of the electric Suspends electricity. The method can e.g. B. be carried out in such a way that 250 g of alum are dissolved in 5 1 of water, this aqueous solution in the boiling state with a likewise boiling solution of Mix 750 g of borax in 5 l of water, mixing taking place with constant stirring.
Dieser kochenden Mischung wird nun eine kochende Lösung von 250 g 95 prozentigem Natriumhydroxyd (Na O H) in iy21 Wasser und 2 1 Wasserglaslösung beigemengt. In das kochende Bad wird Aluminium, das auf 150 bis 200° C. erwärmt worden ist, eingelegt, und zwar wird Aluminiumblech an den beiden Elektroden der Gleichstromleitung angeschlossen. An der Kathode beobachtet man dann Langsame Gasentwicklung unter gleichzeitiger Bildung eines lebhaft glänzenden, rein metallisch aussehenden Überzuges. Die Anode wird nicht angegriffen. Infolge der hierbei entstehenden spiegelglatten Oberfläche, die ursprünglich ganz rauh war, tritt eine Erhöhung der Widerstandsfähigkeit des auf diese Weise behandelten Aluminiumbleches ein.A boiling solution of 250 g of 95 percent sodium hydroxide (Na OH) in 2 liters of water and 2 liters of water glass solution is then added to this boiling mixture. Aluminum that has been heated to 150 to 200 ° C. is placed in the boiling bath, and aluminum sheet is connected to the two electrodes of the direct current line. Slow evolution of gas is then observed at the cathode with simultaneous formation of a lively, shiny, purely metallic-looking coating. The anode is not attacked. As a result of the resulting mirror-smooth surface, which was originally quite rough, the resistance of the aluminum sheet treated in this way increases.
Nach etwa 20 bis 30 Sekunden wird das Aluminiumblech dem Bade entnommen und in ein Bad von Glycerin oder 5 Teilen Salpetersäure und 5 Teilen einer Lösung von gebranntem Kalk eingelegt. In diesem Bade werden allfällig vorhandene Unreinigkeiten entfernt, und es wird dem Aluminium ein mattweißes Ansehen verliehen. Nach dem Säurebad wird das Aluminium mit frischem Wasser gespült.After about 20 to 30 seconds, the aluminum sheet is removed from the bath and in a bath of glycerin or 5 parts of nitric acid and 5 parts of a solution of calcined Pickled lime. Any impurities that may be present are removed in this bath, and the aluminum is given a matt white appearance. After the acid bath, the aluminum is washed with fresh water flushed.
Die Erfahrung hat gezeigt, daß Aluminium, das diesem Verfahren unterzogen worden ist, von den organischen Säuren nicht angegriffen wird, der Witterung ausgesetzt seine mattweiße Farbe beibehält und auch eine erhöhte Bieg- und Druckfestigkeit erhält. Durch das vorhin beschriebene Verfahren werden die äußern Flächen des Aluminiums gereinigt, so daß man darauf mit jeder Tinte oder mit Bleistift schreiben, ferner photographieren und lithographieren, Buch- und Öldruck darauf ausführen kann. Auf dem so vorbehandelten Aluminium haften die Farben außerordentlich gut, und letztere springen auch dann nicht ab, wenn das Aluminium gebogen wird (Farben, öllasuren, Email).Experience has shown that aluminum subjected to this process is not attacked by the organic acids, exposed to weathering its matt white Retains color and also has increased flexural and compressive strength. By the The procedure described above is used to clean the outer surfaces of the aluminum, see above that one can write on it with any kind of ink or pencil, and also take photographs and lithograph, letterpress and oil printing on it. On the one pretreated in this way Aluminum, the colors adhere extremely well, and the latter does not crack off even if when the aluminum is bent (paints, oil glazes, enamel).
Lagerexempla]Storage sample]
Claims (1)
Verfahren, um Aluminium widerstandsfähig zu machen, gemäß welchem das Aluminium mit einem heißen Gemisch von Natriumhydroxyd mit einem Salz gebeizt wird, dadurch gekennzeichnet, daß man das Aluminium in einer kochenden Mischung von wäßrigen Lösungen von Alaun, Borax und Natriumhydroxyd der Wirkung des elektrischen Stromes aussetzt und dann mittels Salpetersäure und einer wäßrigen Lösung von gebranntem Kalk behandelt.Patent claim:
Process for making aluminum resistant, according to which the aluminum is pickled with a hot mixture of sodium hydroxide with a salt, characterized in that the aluminum is exposed to the action of an electric current in a boiling mixture of aqueous solutions of alum, borax and sodium hydroxide and then treated with nitric acid and an aqueous solution of quick lime.
Publications (1)
Publication Number | Publication Date |
---|---|
DE272043C true DE272043C (en) |
Family
ID=528647
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DENDAT272043D Active DE272043C (en) |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE272043C (en) |
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0
- DE DENDAT272043D patent/DE272043C/de active Active
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