Better Tank Cathodic Protection

Looking for a better tank cathodic protection system?

Find our article in the April 2020 Storage Terminals Magazine. “No More Gridlock—Take the Ring Route” is a comparison of grid anode systems vs concentric ring systems for tank bottom cathodic protection.

Cathodic Protection of the external tank bottom for large diameter above ground storage tanks has been adopted as good engineering practice around the world.

Unfortunately, many existing grid anode systems have experienced premature failures, resulting in excessive tank bottom corrosion and costly replacement.

A recent MATCOR article published in Storage Terminals Magazine provides an overview of these grid CP systems and an alternative concentric ring linear anode system (link to the full article below). Here are just a few key points:

Grid Tank Anode Systems

  • Consist of field assembled MMO ribbon anodes and titanium conductor bars
  • Require flawless design and installation
  • Subject to poor welding and other concerns
  • Failures can be catastrophic

Concentric Ring Linear Anode System

  • Factory assembled—no field cutting or splicing required
  • Easy, fast and reliable installation
  • Coke backfilled sock protects the anode
  • Redundant—each ring segment has two feeds
  • Long life compared to the grid systems of the 1990s

If you have questions, or for information on MATCOR’s above ground storage tank cathodic protection solutions, please contact us at the link below.

Contact a Corrosion Expert

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