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Heater tanks are typically constructed of steel. Since metal tank carries water, it has to be protected against the aggressive water action. There are two ways how to defend the tank from the rust: with the anode rods and tank lining.
Inner tank surface is covered with glass or porcelain lining, but complete coverage is sometimes neglected due to manufacturing imperfection or damaged (cracks) as the result of handling and transportation.
On the other side, potable water contains elements like oxygen, calcium, magnesium, is heated inside the tank.
These ingredients are adding water the ability to be conductive or electrolytic, and to allow the electricity to flow through the water and from one metal (anode) to another (cathode). Changing the water structure or type of material (metal in this case), the amount of electricity can be controlled.
Between anode and cathode, two metal surfaces, a low resistance electrical circuit is created, where water acts as a medium, providing the cathodic protection to the inside surface of the tank. This is protective current that keeps metallic ions at the cathodic surface (metal tank) from corroding.
Contact me for more details :
Vivian Jiang(Ms.)
International Marketing & Sales Department Manager
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China Hunan High Broad New Material Co.Ltd.
70 Chezhan North Road,Changsha, China 410100
Tel:+86-731-85717705 Fax:+86-731-85716569
Mobile/Whatsapp: +86-139-7488-3816
Email: vivian@hbnewmaterial.com , metal@vip.163.com
Skype: vivian.jjy