DE626032C - Process for the production of corrosion-resistant iron pipes - Google Patents

Process for the production of corrosion-resistant iron pipes

Info

Publication number
DE626032C
DE626032C DER89411D DER0089411D DE626032C DE 626032 C DE626032 C DE 626032C DE R89411 D DER89411 D DE R89411D DE R0089411 D DER0089411 D DE R0089411D DE 626032 C DE626032 C DE 626032C
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DE
Germany
Prior art keywords
production
corrosion
iron pipes
resistant iron
pipe
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
DER89411D
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
Publication date
Priority to DER89411D priority Critical patent/DE626032C/en
Application granted granted Critical
Publication of DE626032C publication Critical patent/DE626032C/en
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
    • C23C10/06—Solid state diffusion of only metal elements or silicon into metallic material surfaces using gases
    • C23C10/08—Solid state diffusion of only metal elements or silicon into metallic material surfaces using gases only one element being diffused

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)

Description

Es ist bekannt, schmiedeeiserne GegenständeIt is known wrought iron objects

dadurch korrosionsfest zu machen gegen Feuchtigkeit und Einflüsse korrosiver Wässer, daß dieselben bei etwa iooo°C längere· Zeit hindurch in einer Atmosphäre von Siliciumtetrachlorid geglüht werden und dadurch die Oberflächen der schmiedeeisernen Gegenstände eine Ferrosiliciumschutzschicht erhalten.thereby making it corrosion-resistant against moisture and the effects of corrosive water, that the same at about 100 ° C for a longer time be annealed through in an atmosphere of silicon tetrachloride and thereby the Surfaces of the wrought iron objects are given a ferro-silicon protective layer.

Dieses bislang in der Praxis kaum zur Anwendung gelangte Verfahren besitzt den Nachteil, daß die Bildung der Ferrosiliciumschutzschicht selbst bei iooo0 C sehr unvollkommen und langsam vor sich geht. Die Anwendung höherer Glühtemperaturen, als 10000C ist unwirtschaftlich und bei dünnwandigen Gegenständen deshalb nicht möglich, da solche dann eine Verformung erleiden würden.This hardly reached so far in practice the application process has the disadvantage that the formation of ferrosilicon protective layer very imperfect and slow going even at iooo 0 C on. The use of higher annealing temperatures than 1000 0 C is not economical and thin-walled articles possible because such would then undergo deformation.

Bei dem nachstehend beschriebenen neuen Verfahren, das dem speziellen Zwecke dient, die inneren Oberflächen von schmiedeeisernen Röhren korrosionsfest zu gestalten, wird das Innere der zu silicierenden Rohre bereits während der Herstellung derselben, also dann, wenn das Flacheisen ß (s. Zeichnung) durch den Ziehring b gezogen wird und das geformte Rohr sich noch in Schweißhitze befindet, in der Weise einer Atmosphäre von •' Siliciumtetrachlorid ausgesetzt, ,daß die SiIiciumtetrachloriddämpfe nabe hinter der Schweißstelle zweckmäßig durch eine entsprechend geformte Leitung c in das schon fertig geschweißte Rohr eingeblasen werden, so daß also die Schweißhitze selbst des Herstellungs-Vorganges benutzt wird, um bei diesem hohen Erhitzungsgrad des Eisens die Silirierung schnell derartig durchzuführen, daß der Herstellungsvorgang und die Silicierung der inneren Rohroberfläche zu gleicher Zeit in ein und demselben Herstellungsvorgang durchgeführt wird. In dieser Weise wird also eine Gründlichkeit und Wirtschaftlichkeit der Rohrherstellung und deren Silicierung in höchstem Maße vereinigt.In the new method described below, which serves the special purpose of making the inner surfaces of wrought iron pipes corrosion-resistant, the inside of the pipes to be siliconized is already during the manufacture of the same, i.e. when the flat iron ß (see drawing) by the Drawing ring b is drawn and the formed pipe is still in welding heat, exposed to an atmosphere of silicon tetrachloride in such a way that the silicon tetrachloride vapors behind the welding point are expediently blown into the pipe c that has already been welded through a suitably shaped pipe c That is, that the welding heat itself of the manufacturing process is used to carry out the siliconization quickly with this high degree of heating of the iron in such a way that the manufacturing process and the siliconization of the inner pipe surface are carried out at the same time in one and the same manufacturing process. In this way, the thoroughness and economy of the pipe production and its siliconization are combined to the greatest possible extent.

Es ergibt sich ohne weiteres, daß die gegebenenfalls erforderliche Silicierung der äußeren Rohroberfläche zu gleicher Zeit in der gleichen Art und Weise erfolgen, kann, indem beispielsweise das in Schweißhitze aus dem Schweißauge heraustretende Rohr eine zylindrische, dem Röhrdurchmesser angepaßte Ringleitung d durchwandert, welche mit SiIiciumtetrachloriddämpfen gefüllt und gespeist wird.It follows without further ado that the possibly required siliconization of the outer pipe surface can be carried out at the same time in the same way, for example by the pipe emerging from the welding eye in welding heat passing through a cylindrical ring line d adapted to the pipe diameter, which is filled with silicon tetrachloride vapors is filled and fed.

■ Ebenfalls ergibt sich ohne weiteres die sinngemäße Anwendung des Verfahrens bei der Herstellung von gußeisernen Rohren und Verbindungsstücken aus Schmiedeeisen, schmiedbarem Guß oder Gußeisen.■ Likewise, the analogous application of the method can be found without further ado the production of cast iron pipes and connecting pieces from wrought iron, malleable cast iron or cast iron.

Claims (1)

60 Patentanspruch: 60 claim: Verfahren zur Herstellung einer Schutz-" schicht von Ferrosilicium in und/oder auf schmiedeeisernen Rohren vermittels SiIiciurntetrachloriddänipfe, dadurch gekennzeichnet, daß bei der Herstellung der Rohre durch Verschweißen bandförmigen Werkstoffes die Siliciumtetrachloriddämpfe hinter dem Ziehring· in und/oder auf das glühende Rohr eingeführt oder aufgetragen werden.Process for the production of a protective layer of ferro-silicon in and / or on wrought iron pipes by means of SiIiciurntetrachloriddänipfe, characterized in that in the manufacture of the tubes by welding they are band-shaped The silicon tetrachloride vapors behind the drawing ring in and / or be introduced or applied to the glowing pipe. Hierzu 1 Blatt Zeichnungen1 sheet of drawings
DER89411D Process for the production of corrosion-resistant iron pipes Expired DE626032C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DER89411D DE626032C (en) Process for the production of corrosion-resistant iron pipes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER89411D DE626032C (en) Process for the production of corrosion-resistant iron pipes

Publications (1)

Publication Number Publication Date
DE626032C true DE626032C (en) 1936-02-19

Family

ID=7418152

Family Applications (1)

Application Number Title Priority Date Filing Date
DER89411D Expired DE626032C (en) Process for the production of corrosion-resistant iron pipes

Country Status (1)

Country Link
DE (1) DE626032C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE938943C (en) * 1941-11-12 1956-02-09 Mannesmann Ag Crucible material for salt baths

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE938943C (en) * 1941-11-12 1956-02-09 Mannesmann Ag Crucible material for salt baths

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