Specialty Tanks

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Glossary

Class A Certification

5.1.5.2   Corrosion Resistance

 

Cathodic Protection (CP)

         CP is a method of corrosion protection that creates a corrosion cell where the structure (tanks and/or piping) is the cathode instead of the anode.

         CP can be achieved using either a galvanic (sacrificial) anode or impressed current. These are discussed on the next page.

         CP systems must be properly designed and certified by a professional engineer in accordance to a nationally recognized industry standard (e.g. STI – P3).

         Tanks and/or piping must also have a protective coating that isolates the outside surfaces from the electrolyte (moist soils).

         All coatings on steel tanks must be inspected and tested for “holidays” (coating defects – pinholes, etc.) prior to installation for new UST system.