Cathodic Protection


Cathodic Protection (CP) is an effective method of corrosion mitigation for metallic structures that are buried, submersed, or in contact with (i.e. tank bottom) an electrolytic environment. Corrosion is an electrochemical process by which oxidation occurs on the surface of an anode when placed in a common electrolyte with a cathode and physically adjoined via an electrical conductor.

Cathodic protection is achieved by applying direct current in a direction that "forces" the valued metallic structure to become the cathode-half of the process. The anode bed, or "groundbed", consists of either impressed current or sacrificial type anodes, which are chosen in composition and placed in configuration, location, and quantity based on engineering data analysis and design.

Summary of E-MAC Corrosion Inc. Services

  • Cathodic Protection System Engineering Designs for Pipelines, Well Casings, Tank Bottoms, and Underground Tanks
  • External Corrosion Related Failure Analysis
  • Impressed Current System Installations
    • Horizontal, Deep-Well, and Semi-Deep Groundbeds
    • Ceranode "Piggy-Back" Tank Bottom Systems
  • Sacrificial Anode System Installations
    • Magnesium Anode Beds
    • Zinc Anode Beds
    • Aluminum Anode Beds
  • Test Station Installations
  • CP System Design Surveys
  • Annual CP Surveys
  • AC/DC Electrical Interference Testing
  • Rectifier Maintenance/Monitoring
  • Cathodic Protection Repairs
    • Rectifiers
    • Cable Breaks
    • Groundbed Replacements/Expansions
    • Detrimental Interference Alleviation
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