Aluminum Anode for Hull

Monday, 14 May 2018 00:00

Aluminum Anode

BORNA Godaz aluminum anodes are specially formulated for cathodic protection system application in sea water, seabed mud and higher resistivity waters . Aluminum anodes are sacrificial type anodes  having an electro-chemical property that makes them suitable for cathodic protection systems with driving voltage of 300 mv against protected steal and rather three times the capacity of zinc anodes. this anodes are capable of achieving high output capacity in mud and brackish water of resistivity up to 150 Ohm cm.

Drawback of pure aluminum is passivating, an oxide film can develop on the surface of the aluminum ingot that makes the material passive. Aluminum alloy sacrificial anodes have been developed so that one or more of the alloys disrupts the protective oxide layer and makes the alloy anodic to promote even corrosion when the anode is placed in the electrolyte.

Typical Applications

  • Offshore Structures 
  • Marine Structures
  • Sheet Pile Walls
  • Submarine Pipelines
  • Tank Internals
  • Shipping

TheBORNA GodazAluminum Alloy Anodes are made from the highest purity aluminum ingot to conform to the following material composition:

       
Aluminum chemical composition    
Element Alloy Type 1 Alloy Type 2 Alloy Type 3
Zinc (%) 0.30 - 0.05 0.30 - 6.0 2.5 - 5.75
Indium (%) ---- ---- 0.015 - 0.040
Hg(%) 0.30 - 0.05 0.35 - 0.5
Cadmium (%) ---- ---- 0.002 max
Silicon (%) 0.11 - 0.21 0.11 - 0.21 0.12 max
Iron (%) 0.13 max 0.13 max 0.09 max
Copper (%) 0.006 max 0.006 max 0.003 max
All others (%) 0.02 max 0.02 max 0.02 max
Aluminum (%) Remainder Remainder Remainder

  Standards:

  NACE - DNV

  U.S.Military

  ASTM - IPS

Eletrical Properties Environment
Sea water Sediments
Electrochemical capacity (Ah/Kg) 2000 1500
Closed circuit potential (V) -1.05 -0.95
(Respect to Ag/Agcl reference electrode)
Efficiency (%) 90 90

BORNA Godazaluminum anodes can be made in various shapes &size to suit individual applications. They normally have steel-bar or rod cores for attachment to the structure by welding, or either bolts & clamps.

The following drawings show typical zinc anodes from BORNA Godaz . However we can supply other shapes and size to customer's own requirement.

Contact us

02156233930-02156233929
02156232587-02156236590
02156230236
 Info@bornagodaz.com
Tehran Province, Shamsabad Industrial City, Golbarg Number 2

     

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Bornagodaz

BORNA Godaz Company was established on the path of development of BORNA Electronic activities in the field of cathodic protection in 2004. ...

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