DE908548C - Process for the electrolytic polishing of metals - Google Patents
Process for the electrolytic polishing of metalsInfo
- Publication number
- DE908548C DE908548C DEH12038A DEH0012038A DE908548C DE 908548 C DE908548 C DE 908548C DE H12038 A DEH12038 A DE H12038A DE H0012038 A DEH0012038 A DE H0012038A DE 908548 C DE908548 C DE 908548C
- Authority
- DE
- Germany
- Prior art keywords
- electrolyte
- electrolytic polishing
- acid
- acetic acid
- metals
- 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
- 238000005498 polishing Methods 0.000 title claims description 9
- 229910052751 metal Inorganic materials 0.000 title claims description 8
- 239000002184 metal Substances 0.000 title claims description 8
- 238000000034 method Methods 0.000 title claims description 5
- 150000002739 metals Chemical class 0.000 title description 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 21
- 239000003792 electrolyte Substances 0.000 claims description 14
- 229960000583 acetic acid Drugs 0.000 claims description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 239000012362 glacial acetic acid Substances 0.000 claims description 6
- VLTRZXGMWDSKGL-UHFFFAOYSA-N perchloric acid Chemical compound OCl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-N 0.000 claims description 6
- 150000003839 salts Chemical class 0.000 claims description 6
- VLTRZXGMWDSKGL-UHFFFAOYSA-M perchlorate Inorganic materials [O-]Cl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-M 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- WFDIJRYMOXRFFG-UHFFFAOYSA-N Acetic anhydride Chemical compound CC(=O)OC(C)=O WFDIJRYMOXRFFG-UHFFFAOYSA-N 0.000 description 15
- 239000002253 acid Substances 0.000 description 7
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 150000001242 acetic acid derivatives Chemical class 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- XTEGARKTQYYJKE-UHFFFAOYSA-N chloric acid Chemical compound OCl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-N 0.000 description 1
- 229940005991 chloric acid Drugs 0.000 description 1
- AXZAYXJCENRGIM-UHFFFAOYSA-J dipotassium;tetrabromoplatinum(2-) Chemical compound [K+].[K+].[Br-].[Br-].[Br-].[Br-].[Pt+2] AXZAYXJCENRGIM-UHFFFAOYSA-J 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 210000002837 heart atrium Anatomy 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 125000000896 monocarboxylic acid group Chemical group 0.000 description 1
- 229910001487 potassium perchlorate Inorganic materials 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000010959 steel Substances 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
- C25F3/16—Polishing
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Description
Verfahren zum elektrolytischen Polieren von Metallen Zum elektrolytischen Polieren von Stahl und Aluminium werden im allgemeinen zwei Arten von Elektrolyten benutzt. Der eine von ihnen enthält in der Hauptsache Phosphorsäure und Schwefelsäure, der andere wird aus Essigsäureanhydrid und überchlorsäure hergestellt. Ein eingehender Vergleich der beiden Elektrolyte ergab eine Überlegenheit des letztgenannten. Sowohl der Glanz der polierten Fläche wie die anodische Stromausbeute und die Löslichkeit der bei der Abtragung der Oberfläche auftretenden Metallsalze waren bei dem Elektrolyt aus Essigsäureanhydrid und Überchlorsäure wesentlich größer.Process for electrolytic polishing of metals To electrolytic Polishing steel and aluminum are generally two types of electrolytes used. One of them contains mainly phosphoric acid and sulfuric acid, the other is made from acetic anhydride and superchloric acid. An in-depth Comparison of the two electrolytes showed a superiority of the latter. As well as the gloss of the polished surface as well as the anodic current efficiency and the solubility the metal salts that occurred when the surface was ablated were in the electrolyte made from acetic anhydride and superchloric acid is much larger.
Die Herstellung dieses Elektrolyts geschieht bisher durch Mischung von Essigsäureanhydrid mit wäßriger Überchlorsäure (H Cl 04 -h H20), wobei durch das Wasser der wäßrigen Überchlorsäure das Essigsäureanhydrid zu Essigsäure umgesetzt wird, so daß praktisch der fertige Elektrolyt ein Gemisch aus wasserfreier Essigsäure und Überchlorsäure (C H3 C O O H und H Cl 04) darstellt.This electrolyte has so far been produced by mixing acetic anhydride with aqueous superchloric acid (H Cl 04 -h H20), whereby the acetic anhydride is converted into acetic acid by the water of the aqueous superchloric acid, so that practically the finished electrolyte is a mixture of anhydrous acetic acid and superchloric acid (C H3 COOH and HCl 04).
Bei den nicht unerheblichen Kosten der für den Elektrolyt der genannten Art verwendeten Überchlorsäure mußte versucht werden, letztere durch einen billigeren Stoff zu ersetzen. Zur Lösung dieses Problems ging man von der Erkenntnis aus, daß bei der anodischen Abtragung im wesentlichen nur die Anionen wirksam sind. Es mußte also möglich sein, .die Perchlorat-Ionen der Säure durch die eines ihrer Salze zu ersetzen.With the not inconsiderable cost of the electrolyte mentioned The kind of excess chloric acid used had to be tried, the latter with a cheaper one Replace fabric. The solution to this problem was based on the knowledge that in the case of anodic removal, essentially only the anions are effective. It should so be possible to .the perchlorate ions of the acid through one of its salts substitute.
Eingehende Versuche ergaben nun, daß diese Überlegungen richtig waren. Wenn auch die meisten anorganischen Salze in Essigsäure im allgemeinen nur schwach löslich sind, zeigten doch die Perchlorate eine verhältnismäßig hohe Löslichkeit, wobei lediglich das Kalitinrperchlorat eine Ausnahme macht.Thorough experiments have now shown that these considerations were correct. Even if most of the inorganic salts in acetic acid are generally only weak are soluble, but the perchlorates showed a relatively high solubility, whereby only the potassium perchlorate is an exception.
Es wurde deshalb Eisessig an \ atriumperchlorat gesättigt und diese Lösung versuchsweise als Elektrolyt zum elektrolytischen Polieren benutzt. Dabei gelang es, eine dem Polieren in dem bekannten, aus Essigsäureanhydrid- und Überchlorsäure gemischten Elektrolyt völlig gleiche Polierwirkung zu erzielen, Ähnliche Ergebnisse wurden mit anderen, in Eisessig löslichen Perchloraten erzielt.Therefore glacial acetic acid was saturated with atrium perchlorate and this Solution used experimentally as an electrolyte for electrolytic polishing. Included succeeded in polishing in the familiar, from acetic anhydride and superchloric acid mixed electrolyte to achieve completely the same polishing effect, similar results were achieved with other perchlorates soluble in glacial acetic acid.
Gegenstand der Erfindung ist deshalb ein Verfahren zum elektrolytischen Polieren von Gegenständen aus Metall, insbesondere aus Eisen und Aluminium sowie deren Legierungen, bei dem als Elektrolyt die Lösung eines Perchlorats in Eisessig Verwendung findet, das unter Umständen auch etwas Wasser enthalten kann.The invention therefore provides a method for electrolytic Polishing of objects made of metal, in particular made of iron and aluminum as well their alloys, in which the electrolyte is a solution of a perchlorate in glacial acetic acid Is used, which may also contain some water.
Ein weiterer erheblicher Vorteil dieses zum elektrolytischen Polieren erfindungsgemäß zu verwendenden Elektrolyts besteht den bekannten Elektrolyten gegenüber darin, daß beim L?berschreiten eines gewissen Metallgehalts (bei Eisen von etwa i 5 g/1) das Metall in Form eines @-.cetats ausfällt und äbfiltriert werden kann. Da in dem ausfallenden Salz Perchlorat nicht nachgewiesen werden kann, genügt die Zugabe einer dem Acetatgehalt des Salzes entsprechenden Menge von Eisessig, um den Elektrolyt arbeitsfähig zu erhalten.Another significant advantage of this for electrolytic polishing The electrolyte to be used according to the invention is opposed to the known electrolytes in the fact that when a certain metal content is exceeded (for iron of about i 5 g / 1) the metal precipitates in the form of a acetate and can be filtered off. Since perchlorate cannot be detected in the precipitating salt, this is sufficient Add an amount of glacial acetic acid corresponding to the acetate content of the salt to make the To keep the electrolyte working.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEH12038A DE908548C (en) | 1952-04-04 | 1952-04-04 | Process for the electrolytic polishing of metals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEH12038A DE908548C (en) | 1952-04-04 | 1952-04-04 | Process for the electrolytic polishing of metals |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE908548C true DE908548C (en) | 1954-04-08 |
Family
ID=7146878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEH12038A Expired DE908548C (en) | 1952-04-04 | 1952-04-04 | Process for the electrolytic polishing of metals |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE908548C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1088777B (en) * | 1956-06-06 | 1960-09-08 | Dr Joseph Heyes | Electrolyte for anodic polishing of metals |
-
1952
- 1952-04-04 DE DEH12038A patent/DE908548C/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1088777B (en) * | 1956-06-06 | 1960-09-08 | Dr Joseph Heyes | Electrolyte for anodic polishing of metals |
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