Anode
What is the purpose of sacrificial anode in heat exchanger ?
ธ.ค.
What is the purpose of sacrificial anode in heat exchanger ?
What is the purpose of sacrificial anode in heat exchanger ? : Sacrificial anodes are commonly used in heat exchangers to protect metal components from corrosion. Corrosion is an electrochemical process that occurs when metals are exposed to oxygen and water. In a heat exchanger, the metal components are typically made of materials such as copper, steel, or aluminum, which are prone to corrosion.
The sacrificial anode is typically made of a more reactive metal than the metal components of the heat exchanger. When the sacrificial anode is placed in the same electrolyte as the metal components, it corrodes instead of the metal components. The anode essentially sacrifices itself to protect the metal components from corrosion.
This is because the sacrificial anode has a more negative electrochemical potential than the metal components of the heat exchanger. As a result, the electrons flow from the anode to the metal components, thereby protecting the metal components from corrosion.
Sacrificial anodes are typically made of materials such as zinc, aluminum, or magnesium, which are more reactive than the metal components of the heat exchanger. The sacrificial anode needs to be periodically replaced, as it will eventually be completely corroded.
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