DE741670C - Electrolyte for the production of protective coatings on heavy metals and their alloys - Google Patents

Electrolyte for the production of protective coatings on heavy metals and their alloys

Info

Publication number
DE741670C
DE741670C DEL106072D DEL0106072D DE741670C DE 741670 C DE741670 C DE 741670C DE L106072 D DEL106072 D DE L106072D DE L0106072 D DEL0106072 D DE L0106072D DE 741670 C DE741670 C DE 741670C
Authority
DE
Germany
Prior art keywords
electrolyte
alloys
heavy metals
production
protective coatings
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
Application number
DEL106072D
Other languages
German (de)
Inventor
Dr Rudolf Heinrich Leutz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RUDOLF HEINRICH LEUTZ DR
Original Assignee
RUDOLF HEINRICH LEUTZ DR
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by RUDOLF HEINRICH LEUTZ DR filed Critical RUDOLF HEINRICH LEUTZ DR
Priority to DEL106072D priority Critical patent/DE741670C/en
Application granted granted Critical
Publication of DE741670C publication Critical patent/DE741670C/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Treatment Of Metals (AREA)

Description

Elektrolyt zur Herstellung schützender überzüge auf Schwermetallen und deren Legierungen Es :sind Verfahren bekannt, Aluminium und Leichtmetalle in geeigneten Bädern elektrolytisch reit Oxydschichten zum Schutze gegen Korrosion zu überziehen. Weiterhin sind Verfahren bekannt, Eisen oder Zink ,mit korrosionsschiitzendenPhosphatschichten oder Chromaten zu überziehen.Electrolyte for the production of protective coatings on heavy metals and their alloys There: are known processes aluminum and light metals in suitable baths electrolytically riding oxide layers to protect against corrosion to cover. Processes are also known, iron or zinc, with anti-corrosion phosphate layers or to coat chromates.

Neu und Gegenstand -der vorliegenden Erfindung ist ein Elektrolyt, in -,velchem Schwermetalle und deren Legierungen, insbesondere Zink, im Bade elektrolytisch mit Silikatschichten oder anderen beständigen Oxydschichten überzogen werden. Gleichzeitig bilden sich aus den Leitsalzen oder Säuren des Bades und dem zu schützenden Metalle in Wasser schwer lösliche Salze. Die zu überziehenden Gegenstände werden als Anode in ein Bad eingebracht, welches vorzugsweise aus kolloiden Lösungen und geeigneten Leitsalzen oder Säuren hergestellt wind. Soll z. B. Zink mit einer schützenden Silikatschicht überzogen werden, so wird ein Bad aus kolloider Kieselsäure in Anwendung gebracht, dessen pH-Wert mit Metaphosphaten oder Pyrophosphaten auf 3 bis 6 eingestellt wird. Es kann aber auch beispielsweise eine wässerige Lösung von Titankal,iumoxallat verwendet werden. Wesentlich ist die Anwendung geeigneter Leitsalze oder Säuren, deren Anionen das zu schützende Metallnicht oder sehr wenig angreifen.. Als solche kommen Oxalsäure, Phosphorsäure, Pyro- oder Metaph osphoTsäurc und deren Salze vorzugsweise in Frage. Damit soll aber nicht gesagt sein, daß nicht auch Borsäure oder andre Säuren bztv. deren Salze in Frage kommen. Die Auswahl der Säuren und Leitsalze erfolgt sinngemäß je nach dem gewünschten Effektund dem zu schützenden Metall.New and object of the present invention is an electrolyte, in -, velchem heavy metals and their alloys, especially zinc, electrolytically in the bath be covered with layers of silicate or other permanent oxide layers. Simultaneously are formed from the electrolyte salts or acids in the bath and the metals to be protected salts that are sparingly soluble in water. The objects to be coated are called the anode placed in a bath, which preferably consists of colloidal solutions and suitable Conductive salts or acids produced wind. Should z. B. zinc with a protective silicate layer are coated, a bath of colloidal silica is applied, the pH of which is adjusted to 3 to 6 with metaphosphates or pyrophosphates. However, it is also possible, for example, to use an aqueous solution of titanium calcium iumoxallate will. It is essential to use suitable electrolyte salts or acids and their anions do not attack or only slightly attack the metal to be protected. Phosphoric acid, pyro- or metaphosphoric acid and their salts are preferred. This does not mean, however, that boric acid or other acids or. whose salts come into question. The selection of the acids and supporting electrolyte salts is analogous depending on the desired effect and the metal to be protected.

Claims (1)

PATENTANSPRUCH: Elektrolyt ,zur Herstellung schützender Überzüge äüf -Schwermetallen und deren Legierungen durch anodische Behandlung. dadurch gekennzeichnet, daB er aus einer wässerigen kolloiden Lösung eines der Oxyde von Silicium, Titan, Zirkon, Aluminium oder der seltenen Erden und solchen Leitsalzen oder Säuren besteht,deren Anionen mit dem zu schützenden Metall solche Salze bilden, die in Wasser schwer löslich sind. Zur .--#.bgrenzung des Anmeldungsgegenstandes vom Stand der Technik sind im Erteilungsverfahren keine Druckschriften in Betracht gezogen worden.PATENT CLAIM: Electrolyte, for the production of protective coatings äüf - Heavy metals and their alloys by anodic treatment. characterized, that from an aqueous colloidal solution one of the oxides of silicon, titanium, Zircon, aluminum or rare earths and such conductive salts or acids, whose Anions with the metal to be protected form such salts, which are difficult in water are soluble. To - #. Limit the subject of the application to the state of the art no publications were taken into account in the granting procedure.
DEL106072D 1941-11-28 1941-11-28 Electrolyte for the production of protective coatings on heavy metals and their alloys Expired DE741670C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEL106072D DE741670C (en) 1941-11-28 1941-11-28 Electrolyte for the production of protective coatings on heavy metals and their alloys

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEL106072D DE741670C (en) 1941-11-28 1941-11-28 Electrolyte for the production of protective coatings on heavy metals and their alloys

Publications (1)

Publication Number Publication Date
DE741670C true DE741670C (en) 1943-11-15

Family

ID=7290262

Family Applications (1)

Application Number Title Priority Date Filing Date
DEL106072D Expired DE741670C (en) 1941-11-28 1941-11-28 Electrolyte for the production of protective coatings on heavy metals and their alloys

Country Status (1)

Country Link
DE (1) DE741670C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2000227A1 (en) * 1969-01-21 1970-07-30 Durolith Corp Corrosion-resistant metal plate, especially as a support member for photolithographic plates

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2000227A1 (en) * 1969-01-21 1970-07-30 Durolith Corp Corrosion-resistant metal plate, especially as a support member for photolithographic plates

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