Electrode of anode grounding of the stripping type in the coke package

Electrode of anode grounding of the stripping type in the coke package

Purpose

• Use of the coke backfill of the anode groundings permits to use them in the heavy clay grounds where drainage of gases forming during electrochemical reaction from the surface of the anode is difficult which may lead to “gas blocking”, i.e. loss of the electric contact of the anode surface with the ground. Also presence of coke backfill reduces resistance to current spreading from the anode, increases the service life and base specific density of the protection current.

Operation principle

• The outer coating of the electrodes has mainly an electron type of conductivity which excludes its complete destruction;
• Organosilicon compounds are used in the structure if the coke backfill forming gels while contacting with the ground electrolyte preventing from penetration of the electrolyte and early corrosion destruction of the main polymeric anode body;
• Service life of such electrodes makes 30-50 years due to the carbon material stock (coke chips) and low coefficient of electrochemical dissolution.