Zinc Ribbon Anode

Definition - What does Zinc Ribbon Anode mean?

A zinc ribbon anode provides cathodic protection (CP) for underground coated pipelines. Zinc, being a sacrificing element in zinc ribbon anodes, contributes to a very simple, cost-effective and maintenance-free corrosion control method for buried or immersed metals such as iron, steel, aluminum or copper. Zinc ribbon anodes are an ideal solution only for coated pipelines.

Corrosionpedia explains Zinc Ribbon Anode

Zinc ribbon anodes are especially useful:

  • Where human intervention is limited or for isolated locations (e.g., intrastate or interstate pipelines)
  • Where other cathodic protection (CP) systems require monitoring and frequent maintenance
  • Where an external power source are not possible (e.g., locations where equipment is battery or solar powered)

Zinc ribbon anodes are used in a variety of applications, including:

  • Simple and cost-effective solutions that provide cathodic protection to underground petroleum, water or sewage pipelines
  • When the effect of an AC current on pipelines must be minimized
  • As sacrificial cathodic protection on the bottom portion of storage tanks built above ground

Cathodic protection is an electrochemical method to prevent corrosion in industrial infrastructures, where the oxidation reaction in a galvanic cell is focused on the anode to suppress corrosion of the cathode in the same cell. This is achieved by incorporating an easily corroded metal (zinc) that acts as the anode of the electrochemical cell in contact with the metal to be protected.

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