DE347219C - Process for the electrolytic cleaning of objects made of iron or iron alloys - Google Patents
Process for the electrolytic cleaning of objects made of iron or iron alloysInfo
- Publication number
- DE347219C DE347219C DE1921347219D DE347219DD DE347219C DE 347219 C DE347219 C DE 347219C DE 1921347219 D DE1921347219 D DE 1921347219D DE 347219D D DE347219D D DE 347219DD DE 347219 C DE347219 C DE 347219C
- Authority
- DE
- Germany
- Prior art keywords
- iron
- objects made
- electrolytic cleaning
- alloys
- bath
- 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
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims description 38
- 238000000034 method Methods 0.000 title claims description 8
- 229910000640 Fe alloy Inorganic materials 0.000 title claims description 6
- 238000004140 cleaning Methods 0.000 title claims description 6
- 229910052742 iron Inorganic materials 0.000 title description 18
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 2
- 150000001879 copper Chemical class 0.000 claims description 2
- 239000003929 acidic solution Substances 0.000 claims 2
- 239000000243 solution Substances 0.000 claims 1
- 239000010410 layer Substances 0.000 description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 239000010941 cobalt Substances 0.000 description 3
- 229910017052 cobalt Inorganic materials 0.000 description 3
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000001464 adherent effect Effects 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/34—Pretreatment of metallic surfaces to be electroplated
- C25D5/36—Pretreatment of metallic surfaces to be electroplated of iron or steel
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F1/00—Electrolytic cleaning, degreasing, pickling or descaling
- C25F1/02—Pickling; Descaling
- C25F1/04—Pickling; Descaling in solution
- C25F1/06—Iron or steel
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)
- Electroplating And Plating Baths Therefor (AREA)
- Electroplating Methods And Accessories (AREA)
Description
DEUTSCHES REICHGERMAN EMPIRE
AUSGEGEBEN AM 17. JANUAR 1922ISSUED JANUARY 17, 1922
REICHSPATENTAMTREICH PATENT OFFICE
PATENTSCHRIFTPATENT LETTERING
-JVe 347219-KLASSE 48 a GRUPPE 11Q -JVe 347219-CLASS 48 a GROUP 11Q
The Fletcher.Electro Salvage Company Ltd. in London.The Fletcher.Electro Salvage Company Ltd. in London.
Verfahren zum elektrolytischen Reinigen von Gegenständen aus Eisen oder Eisenlegierungen. Patentiert im Deutschen Reiche vom 23. Januar 1921 ab. Process for the electrolytic cleaning of objects made of iron or iron alloys. Patented in the German Empire on January 23, 1921.
Für diese Anmeldung ist gemäß dem Unionsvertrage vom 2. Juni 1911 die Priorität auf Grund der Anmeldung in Großbritannien vom 28. Januar 1920 beansprucht.According to the Union Treaty of June 2, 1911, priority is due to this application of the application in Great Britain on January 28, 1920.
Die Erfindung betrifft„das Überziehen von Flächen aus Eisen oder Eisenlegierungen, wie gewöhnlichem oder Spezialstahl, mit Nickel, Eisen, Kobalt und anderen Metallen auf galvanischem Wege und bezieht sich insbesondere auf ein hierbei zu verwendendes Verfahren zum Reinigen des Eisens, das derart ist, daß ein fester und anhaftender Überzug von dem niedergeschlagenen Metall unmittelbar auf der Eisenfläche erzielt werden kann.The invention relates to "the coating of Surfaces made of iron or iron alloys, such as ordinary or special steel, with nickel, Iron, cobalt and other metals by electroplating and relates in particular to a method to be used here for cleaning the iron, the so is that a strong and adherent coating of the deposited metal immediately can be achieved on the iron surface.
Gemäß der Erfindung wird das Eisen oder die Eisenlegierung, die mit dem Niederschlag versehen werden soll, in einem Säurebad, das Kupfersalz enthält, einer elektrolytisches Reinigung unterworfen. Diese ist derart, daß das Eisen ohne ein anhaftendes Häutchea aus Kupfer, zu welchem Metall das Eisen positiv elektrisch ist, rein gemacht wird. Ein für diesen Zweck geeignetes Bad besteht aus einer ίο Lösung von z. B. io bis 12 Prozent Schwefelsäure in Wasser mit etwa 5 bis 10 Prozent Kupfervitriol. Die Temperatur kann hierbei der gewöhnlichen Temperatur der Außenluft entsprechen, sollte aber 490C (120Q F) nicht überschreiten.According to the invention, the iron or the iron alloy to be provided with the precipitate is subjected to electrolytic cleaning in an acid bath containing copper salt. This is such that the iron is made clean without an adhering membrane layer of copper, to which metal the iron is positively electrical. A suitable bath for this purpose consists of a ίο solution of z. B. 10 to 12 percent sulfuric acid in water with about 5 to 10 percent vitriol. The temperature here can correspond to the usual temperature of the outside air, but should not exceed 49 0 C (120 Q F).
Der zu reinigende Gegenstand wird in dem Bad aufgehängt, dessen Behälter mit Blei ausgekleidet oder mit einer Bleielektrode versehen sein kann, worauf Strom von geeigneter Dichte zugeführt wird. Das Eisen wird zweckmäßig zuerst als Kathode benutzt; nach einer gewissen Zeit, deren Dauer von der Dicke der Schicht Oxyd oder anderer Unreinigkeiten abhängt, wird der Strom umgekehrt und so das Eisen zur Anode gemacht. Diese Behandlung hat zur Folge, daß die Oberflächenschicht zuerst durch frei werdenden Wasserstoff angegriffen und weich sowie unzusammenhängend gemacht wird, worauf die teilweise aufgelöste Schicht durch die Stromumkehrung vollständig entfernt und die Eisenfläche chemisch rein gemacht wird. Wenn die Eisenfläche nicht dick überzogen ist, kann die erste elektrolytische Behandlung, bei der das Eisen als Kathode dient, weggelassen werden. Der erforderliche Strom hat gewöhnlich eine Spannung von 8 bis 20 Volt und eine Dichte oder Stärke von 150 bis 500 Amp. pro Quadratfuß Eisenfläche.The object to be cleaned is hung in the bath, its container with lead lined or provided with a lead electrode, whereupon current of suitable Density is supplied. The iron is expediently first used as a cathode; after a a certain time, the duration of which depends on the thickness of a layer of oxide or other impurities depends, the current is reversed, making the iron an anode. This treatment has the consequence that the surface layer is first attacked by released hydrogen and is made soft and incoherent, whereupon the partially dissolved layer is completely reversed by the current reversal removed and the iron surface is made chemically clean. If the iron face doesn't is thickly coated, the first electrolytic treatment, in which the iron as Cathode is used, can be omitted. The current required is usually a voltage from 8 to 20 volts and a density or strength from 150 to 500 amps per square foot Iron surface.
Die Fläche des Werkstücks wird vor Einführung in- das Bad vom Fett gereinigt, nach Beendigung der elektrolytischeri Behandlung ist sie chemisch rein .und bleibt unberührt, bis der galvanische Niederschlag bewirkt ist, was mittels irgendeiner der üblichen Lösungen ausgeführt werden kann. Es hat sich gezeigt, daß Eisen, Nickel und Kobalt auf eine wie angegeben gereinigte Fläche unmittelbar niedergeschlagen werden kann, ohne also eine Kupfer- oder andere Grundschicht zwischenzuschalten. Sonst kann das Überzug- oder Niederschlagverfahren in der üblichen Weise ausgeführt werden. Das Verfahren nach der Erfindung ermöglicht es, abgenutzte Teile von Maschinen oder Mechanismen bis zu jedem erforderlichen Grade durch eine Eisenschjcht zu verdicken, die mit dem Grundmetall homogen ist und so die Wiederverwendung der abgenutzten Teile ermöglicht. Die niedergeschlagene Schicht kann, wenn gewünscht, auch durch Oberflächenhärtung gehärtet werden. Es ist zwar schon bekannt, Eisengegenstände in sauren, besonders schwefelsauren Lösungen ohne Kupfergehalt elektrolytisch zu reinigen. Dabei hat man den Gegenstand entweder als Anode oder als Kathode oder auch abwechselnd als Kathode und Anode an die Stromleitung angeschlossen. Die Gegenwart von Kupfer bietet aber nach Angaben des Erfinders erhebliche Vorteile, was sich besonders in der geringeren Spannung, in der besseren Reinigung und in der Entbehrlichmachung einer Zwischenschicht von der Erzeugung des Nickel- bzw. Kobaltniederschlages bemerkbar macht.The surface of the workpiece is cleaned of grease before it is introduced into the bath, after When the electrolytic treatment is terminated, it is chemically pure and remains unaffected. until the electrodeposition is effected, which can be done by any of the usual solutions can be executed. It has been shown that iron, nickel and cobalt act on a like specified cleaned area can be knocked down immediately, i.e. without a Intermediate copper or other base layer. Otherwise the coating or Precipitation procedures are carried out in the usual manner. The procedure after the Invention allows worn parts of machines or mechanisms up to any to thicken the required degree by an iron layer that is homogeneous with the base metal and thus enables the re-use of the worn parts. The downcast If desired, the layer can also be hardened by surface hardening. It is already known to use iron objects in acidic, especially sulfuric acid, solutions Electrolytically cleaned without copper content. You either have the object as a Anode or cathode or alternately as cathode and anode on the power line connected. However, according to the inventor, the presence of copper offers considerable advantages, which is particularly important in lower tension, in better cleaning and in being dispensable an intermediate layer from the generation of the nickel or cobalt precipitate power.
Claims (3)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2710/20A GB162391A (en) | 1920-01-28 | 1920-01-28 | Improvements in or relating to the electro deposition of metals upon iron and alloys of iron |
Publications (1)
Publication Number | Publication Date |
---|---|
DE347219C true DE347219C (en) | 1922-01-17 |
Family
ID=33462618
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1921347219D Expired DE347219C (en) | 1920-01-28 | 1921-01-23 | Process for the electrolytic cleaning of objects made of iron or iron alloys |
Country Status (5)
Country | Link |
---|---|
US (1) | US1417896A (en) |
DE (1) | DE347219C (en) |
FR (1) | FR529936A (en) |
GB (1) | GB162391A (en) |
NL (1) | NL8437C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE741666C (en) * | 1942-01-12 | 1943-11-15 | Messerschmitt Boelkow Blohm | Process for the electrolytic removal of contaminants deposited on valve cones, in particular exhaust valves, of high-quality internal combustion engines |
DE939659C (en) * | 1952-06-28 | 1956-03-01 | Richard Dr Springer | Process for the electrolytic descaling of metal surfaces in alkaline solutions |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE471083A (en) * | 1945-07-31 | |||
US2457061A (en) * | 1945-10-25 | 1948-12-21 | Int Nickel Co | Method for bonding a nickel electrodeposit to a nickel surface |
FR1500185A (en) * | 1966-08-08 | 1967-11-03 | Ct De Rech S Du Fer Blanc | Electrolytic tinning process of a steel strip |
-
1920
- 1920-01-28 GB GB2710/20A patent/GB162391A/en not_active Expired
-
1921
- 1921-01-17 US US437943A patent/US1417896A/en not_active Expired - Lifetime
- 1921-01-19 FR FR529936D patent/FR529936A/en not_active Expired
- 1921-01-23 DE DE1921347219D patent/DE347219C/en not_active Expired
- 1921-02-15 NL NL18048A patent/NL8437C/xx active
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE741666C (en) * | 1942-01-12 | 1943-11-15 | Messerschmitt Boelkow Blohm | Process for the electrolytic removal of contaminants deposited on valve cones, in particular exhaust valves, of high-quality internal combustion engines |
DE939659C (en) * | 1952-06-28 | 1956-03-01 | Richard Dr Springer | Process for the electrolytic descaling of metal surfaces in alkaline solutions |
Also Published As
Publication number | Publication date |
---|---|
NL8437C (en) | 1923-02-15 |
FR529936A (en) | 1921-12-09 |
GB162391A (en) | 1921-04-28 |
US1417896A (en) | 1922-05-30 |
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