DE397022C - Process, tubes, etc. Like. Hollow bodies to be galvanically provided inside with a metallic protective coating - Google Patents

Process, tubes, etc. Like. Hollow bodies to be galvanically provided inside with a metallic protective coating

Info

Publication number
DE397022C
DE397022C DEL56465D DEL0056465D DE397022C DE 397022 C DE397022 C DE 397022C DE L56465 D DEL56465 D DE L56465D DE L0056465 D DEL0056465 D DE L0056465D DE 397022 C DE397022 C DE 397022C
Authority
DE
Germany
Prior art keywords
tubes
protective coating
hollow bodies
provided inside
metallic protective
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
DEL56465D
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DEL56465D priority Critical patent/DE397022C/en
Application granted granted Critical
Publication of DE397022C publication Critical patent/DE397022C/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
    • C25D7/00—Electroplating characterised by the article coated
    • C25D7/04—Tubes; Rings; Hollow bodies

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Insulating Bodies (AREA)

Description

Verfahren, Röhren u. dgl. Hohlkörper innen galvanisch mit einem metallischen Schutzüberzug zu versehen. Um Röhren u. dgl. Hohlkörper innen galvanisch mit einem metallischen Schutzüberzug zu versehen, führt man im allgemeinen einen Draht in den Hohlkörper hinein, der entweder mit Isolationsringen versehen ist oder dessen isolierende Schutzschicht teilweise freigelegt ist. Dieses Verfahren hat den Nachteil, daß das Potentialgefälle längs des Drahtes ein relativ starkes ist und die Beschaffenheit des galvanischen Metallüberzuges infolge der verschiedenen Spannungsverhältnisse eine ungleichmäßige wird. Auch kommt es vor, daß bei Elektrolyten, die nicht gut in die Tiefe arbeiten, .manche Stellen nicht in genügender Dicke mit dem Metall überzogen werden.Process, tubes and the like hollow body inside galvanically with a metallic To provide protective cover. To tubes and the like. Hollow body inside galvanically with a To provide a metallic protective coating, one generally leads a wire in into the hollow body, which is either provided with insulation rings or its insulating protective layer is partially exposed. This method has the disadvantage that the potential gradient along the wire is a relatively strong one and the quality the galvanic metal coating as a result of the different voltage conditions becomes an uneven. Also it happens that with electrolytes that are not good work in depth, some places not thick enough with the metal be coated.

Geht man hingegen so vor, daß man einen Draht, der nur an seinem Ende unisoliert ist, langsam durch das Rohr hindurchzieht, so wird ein gleichmäßiger Metallniederschlag an allen Teilen der Innenwandung gewährleistet. Zweckmäßig wird das freigelegte Drahtende in Kugel- oder Stempelform verbreitert, um den Austritt der Stromlinien gleichmäßiger zu gestalten, oder um bei hohen Stromdichten eine Erhitzung des Elektrolyten zu vermeiden.On the other hand, if you proceed in such a way that you have a wire that is only at its end is uninsulated, slowly pulls it through the pipe, it becomes a more even one Metal deposit guaranteed on all parts of the inner wall. Will be expedient the exposed wire end is widened in the shape of a ball or punch around the outlet to make the streamlines more uniform, or to create a Avoid heating the electrolyte.

Claims (2)

PATENTANSPRÜCHE: _. Verfahren, Röhren u. dgl. Hohlkörper innen galvanisch mit einem metallischen Schutzüberzug zu versehen, dadurch gekennzeichnet, daß in das Rohr ein nur an seinem Ende `unisolierter Draht langsam hindurchgezogen wird. PATENT CLAIMS: _. A method of galvanically providing tubes and similar hollow bodies with a metallic protective coating on the inside, characterized in that a wire, which is only uninsulated at its end, is slowly pulled through the tube. 2. Ausführungsform nach Anspruch r, dadurch gekennzeichnet, daß der Draht an seinem uni-olierten Ende kugel- oder stempelförmig verbreitert wird.2. Embodiment according to claim r, characterized in that the wire is widened spherically or stamp-shaped at its uni-oled end.
DEL56465D 1922-09-23 1922-09-23 Process, tubes, etc. Like. Hollow bodies to be galvanically provided inside with a metallic protective coating Expired DE397022C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEL56465D DE397022C (en) 1922-09-23 1922-09-23 Process, tubes, etc. Like. Hollow bodies to be galvanically provided inside with a metallic protective coating

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEL56465D DE397022C (en) 1922-09-23 1922-09-23 Process, tubes, etc. Like. Hollow bodies to be galvanically provided inside with a metallic protective coating

Publications (1)

Publication Number Publication Date
DE397022C true DE397022C (en) 1924-06-10

Family

ID=7277789

Family Applications (1)

Application Number Title Priority Date Filing Date
DEL56465D Expired DE397022C (en) 1922-09-23 1922-09-23 Process, tubes, etc. Like. Hollow bodies to be galvanically provided inside with a metallic protective coating

Country Status (1)

Country Link
DE (1) DE397022C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE758189C (en) * 1940-05-28 1952-11-04 Bosch Gmbh Robert Flexible anode for galvanic baths
DE939362C (en) * 1953-06-04 1956-02-23 Wilhelm Meyer Process and device for internal chrome plating

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE758189C (en) * 1940-05-28 1952-11-04 Bosch Gmbh Robert Flexible anode for galvanic baths
DE939362C (en) * 1953-06-04 1956-02-23 Wilhelm Meyer Process and device for internal chrome plating

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