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Aluminum alloy sacrificial anode

magnesium anode, zinc anode

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What is the effect of impressed current cathodic protection on ships?

  • Author:Libo
  • Source:wwww.voypictures.com
  • Date:2021-08-06
  • Click:0

        Cathodic protection measures for ships On surface ships, a cathodic protection method combining impressed current cathodic protection with sacrificial anode (zinc, magnesium, aluminum and other metal blocks installed below water line) is usually adopted. The bottom and hull parts and appendages below the waterline are protected by impressed current cathodic protection and long-acting supporting coatings. The ballast water tank and the dirty oil water tank are protected by high efficiency sacrifice anode and long-acting supporting coating. In addition, effective electrical insulation treatment must be carried out between the joints and flanges of different pipes in contact with seawater. 

         At the same time, as impressed current cathodic protection is a mature and effective method for hull corrosion protection, it has been widely used at home and abroad. Especially for large and medium-sized ships with impressed current cathodic protection method, can avoid the installation of sacrificial anode, reduce the navigation resistance, and is not affected by environmental conditions (such as speed, temperature, area and state of paint coating, etc.) and dock superiority and so on limit, effectively restrain hull corrosion, prolong the ships docking cycle. This not only saves the cost, but also ensures that the ship is in a good state of combat readiness, which has obvious economic benefits and significant economic and military significance.

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