DE688720C - Process for applying galvanic metal coatings on chrome alloys - Google Patents

Process for applying galvanic metal coatings on chrome alloys

Info

Publication number
DE688720C
DE688720C DE1936K0141323 DEK0141323D DE688720C DE 688720 C DE688720 C DE 688720C DE 1936K0141323 DE1936K0141323 DE 1936K0141323 DE K0141323 D DEK0141323 D DE K0141323D DE 688720 C DE688720 C DE 688720C
Authority
DE
Germany
Prior art keywords
metal coatings
chrome alloys
galvanic metal
applying galvanic
applying
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
DE1936K0141323
Other languages
German (de)
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.)
RICHARD KOEPF
Original Assignee
RICHARD KOEPF
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 RICHARD KOEPF filed Critical RICHARD KOEPF
Priority to DE1936K0141323 priority Critical patent/DE688720C/en
Application granted granted Critical
Publication of DE688720C publication Critical patent/DE688720C/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
    • C25D3/00—Electroplating: Baths therefor
    • C25D3/02—Electroplating: Baths therefor from solutions
    • C25D3/26—Electroplating: Baths therefor from solutions of cadmium
    • C25D3/28—Electroplating: Baths therefor from solutions of cadmium from cyanide baths

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electroplating And Plating Baths Therefor (AREA)
  • Chemical Treatment Of Metals (AREA)

Description

Verfahren zur Aufbringung galvanischer Metallüberzüge auf Chromlegierungen Zusatz zum Patent 585 708 Den Gegenstand des Hauptpatentes 585 708 bildet ein Verfahren zur Aufbringung galvanischer Metallüberzüge auf Chrom und Chromlegierungen, welches dadurch gekennzeichnet ist, daß abnorm saure Bäder mit einem pH-Wert unter 2,5 verwendet werden. Dieses Verfahren, welches an sich sehr gute Ergebnisse liefert, weist jedoch die Unannehmlichkeiten auf, die mit dem Arbeiten starker Säuren verbunden sind. Insbesondere ist hierbei auf die Entwicklung schädlicher Gase hinzuweisen; die auf die Lunge des Arbeiters ätzend wirken.Process for applying electroplated metal coatings on chrome alloys Addition to patent 585 708 The subject of the main patent 585 708 is a method for applying electroplated metal coatings on chrome and chrome alloys, which is characterized in that abnormally acidic baths with a pH value below 2.5 are used . However, this method, which in itself gives very good results, has the inconveniences associated with working with strong acids. In particular, attention should be drawn to the development of harmful gases; which are corrosive to the worker's lungs.

Zur Erzielung eines einwandfreien Merzuges auf Chrom-Mangan-Legierungen wird erfindungsgemäß mit einem Bad gearbeitet, dessen pH-Wert zwischen 2,5 und 3;0 liegt.To achieve a perfect pull on chromium-manganese alloys according to the invention, a bath is used whose pH value is between 2.5 and 3.0 lies.

Iin folgenden sei ein Ausführungsbeispiel beschrieben Um eine chromhaltige Legierung, welche z. B. 12 % Chrom und 3 5 % Mangan enthält und deren Rest im übrigen aus Eisen besteht, mit einem Nickelüberzug zu versehen, kann da's folgende Bad verwendet werden: Zoo g Nickelsulfat, 30g Natriumsulfat, 2o g Borsäure, zo g Ainmonchlorid im Liter, das durch Zusatz von Schwefelsäure derart angesäuert wird, daß der pH-Wert des Bades zwischen 2,5 und 3,0 liegt.In the following an exemplary embodiment will be described. B. contains 12% chromium and 3 5% of manganese and the balance consisting of iron in the other, provided to with a nickel coating, since's following bath can be used: Zoo g of nickel sulfate, 30g sodium sulfate, 2o g of boric acid, zo g Ainmonchlorid per liter, which is acidified by adding sulfuric acid in such a way that the pH of the bath is between 2.5 and 3.0.

Claims (1)

PATENTANSPRUCH: Abänderung des Verfahrens zur Aufbringung galvanischer Metallüberzüge auf Chromlegierungen nach Patent 585 708, dadurch gekennzeichnet, daß bei Verwendung von Chromlegierungen, die Mangan enthalten, alsUnterlagsmetall derpH-Wert über die bisher für zulässig gehaltene Grenze von 2,5 hinaus bis auf 3,0 gesteigert werden kann.PATENT CLAIM: Modification of the method for applying galvanic metal coatings to chromium alloys according to patent 585 708, characterized in that when chromium alloys containing manganese are used as the underlay metal, the pH value exceeds the limit of 2.5 to 3.0 previously considered permissible can be increased.
DE1936K0141323 1936-02-28 1936-02-28 Process for applying galvanic metal coatings on chrome alloys Expired DE688720C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1936K0141323 DE688720C (en) 1936-02-28 1936-02-28 Process for applying galvanic metal coatings on chrome alloys

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1936K0141323 DE688720C (en) 1936-02-28 1936-02-28 Process for applying galvanic metal coatings on chrome alloys

Publications (1)

Publication Number Publication Date
DE688720C true DE688720C (en) 1940-02-29

Family

ID=7249896

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1936K0141323 Expired DE688720C (en) 1936-02-28 1936-02-28 Process for applying galvanic metal coatings on chrome alloys

Country Status (1)

Country Link
DE (1) DE688720C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE746179C (en) * 1941-07-05 1944-05-27 Erz U Kohle Flotation G M B H Process for the production of pure carbon using the foam swimming process

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE746179C (en) * 1941-07-05 1944-05-27 Erz U Kohle Flotation G M B H Process for the production of pure carbon using the foam swimming process

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