BE399232A - - Google Patents

Info

Publication number
BE399232A
BE399232A BE399232DA BE399232A BE 399232 A BE399232 A BE 399232A BE 399232D A BE399232D A BE 399232DA BE 399232 A BE399232 A BE 399232A
Authority
BE
Belgium
Prior art keywords
lead
emi
cables
pipes
added
Prior art date
Application number
Other languages
French (fr)
Publication of BE399232A publication Critical patent/BE399232A/fr

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23FNON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F11/00Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
    • C23F11/08Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids
    • C23F11/18Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids using inorganic inhibitors
    • C23F11/182Sulfur, boron or silicon containing compounds

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Laying Of Electric Cables Or Lines Outside (AREA)

Description

       

   <EMI ID=1.1> 

  
le 25 novembre 1932.

  
 <EMI ID=2.1> 

  
du plomb employé sous forme de tuyaux pour canalisations

  
et de gaînes pour câbles électriques. Dans oe procédé, les couche@ de protection habituelles (goudron, bral, bitume, asphalte, aiment, béton, etc... ) sont additionnée* d'un

  
 <EMI ID=3.1>  

  
Il peut arriver que des tuyaux de plomb ou des câbles sous plomb soient tirée dans des conduites en métal,

  
 <EMI ID=4.1> 

  
travers des maçonnerie* ou dans des galeries ou égouts sans la présence des couchée de protection habituelles. La même remarque est à faire au sujet de la pose de câbles sous plomb suspendus par des crochets à des câbles aérien*. 

  
Dans les cas spéciaux envisagée ci-dessus, il est d'usage, afin de faciliter le tirage des tuyaux ou des câbles, de recouvrir de graisse les enveloppes de plomb au moment de la pose.

  
La présente Invention a pour objet une extension du

  
 <EMI ID=5.1> 

  
la couche de protection oontre la corrosion est formée par

  
un produit convenable ajouté à la graisse; de préférence du soufre ou des dérivés naturels ou artificiels du soufre sont additionnés à la graisse de telle manière qu'une sulfuration du plomb se produise.

  
L'application de l'invention peut se faire comme suit:
au sortir de la presse à plomb, le tuyau ou la Saine de plomb a été de préférence déjà recouvert d'une pellicule de sulfure de plomb par passage dans une solution aqueuse de sulfure de sodium ou de potassium ou par tout autre procédé approprié. Il a ensuite été enroulé en forme de couronne* ou sur des bobines, puis transporté sur le terrain de pose.

  
Au fur et à mesure que le câble ou le tuyau est déroulé, les ouvriers l'enduisent d'une oouohe de graisse sulfurante et très adhérente.

  
L'enveloppe de plomb se trouve ainsi admirablement protégée contre la corrosion par les agent* chimiques et dans une grande Maure contre les attaque* électrolytique <EMI ID=6.1> 

  

 <EMI ID=7.1> 


  
 <EMI ID=8.1> 



   <EMI ID = 1.1>

  
November 25, 1932.

  
 <EMI ID = 2.1>

  
lead used in the form of pipes for pipelines

  
and sheaths for electric cables. In this process, the usual protective layers (tar, bral, bitumen, asphalt, like, concrete, etc.) are added * with a

  
 <EMI ID = 3.1>

  
It may happen that lead pipes or lead cables are pulled into metal conduits,

  
 <EMI ID = 4.1>

  
through masonry * or in galleries or sewers without the presence of the usual protective layers. The same remark is to be made about the laying of lead cables suspended by hooks from overhead cables *.

  
In the special cases considered above, it is customary, in order to facilitate the pulling of the pipes or cables, to cover the lead envelopes with grease at the time of installation.

  
The object of the present invention is to extend the

  
 <EMI ID = 5.1>

  
the protective layer against corrosion is formed by

  
a suitable product added to the fat; preferably sulfur or natural or artificial sulfur derivatives are added to the fat in such a way that lead sulfidation occurs.

  
The application of the invention can be done as follows:
on leaving the lead press, the pipe or the lead has preferably already been covered with a film of lead sulphide by passing it through an aqueous solution of sodium or potassium sulphide or by any other suitable process. It was then wound up in the shape of a crown * or on coils, and then transported to the laying ground.

  
As the cable or pipe is unwound, the workers coat it with an oouohe of sulphurous grease and very adherent.

  
The lead envelope is thus admirably protected against corrosion by chemical agents * and in a great Moor against electrolytic attack * <EMI ID = 6.1>

  

 <EMI ID = 7.1>


  
 <EMI ID = 8.1>


    

Claims (1)

<EMI ID=9.1> <EMI ID = 9.1>
BE399232D BE399232A (en)

Publications (1)

Publication Number Publication Date
BE399232A true BE399232A (en)

Family

ID=65588

Family Applications (1)

Application Number Title Priority Date Filing Date
BE399232D BE399232A (en)

Country Status (1)

Country Link
BE (1) BE399232A (en)

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