Zinc anodes are sacrificial anodes used in galvanic cathodic protection (CP) systems to prevent corrosion of buried and submerged pipelines.

Zinc anodes are sacrificial anodes used in galvanic cathodic protection (CP) systems to prevent corrosion of buried and submerged pipelines. Zinc’s highly negative electrochemical potential causes it to corrode preferentially — protecting the pipeline steel from external corrosion.

Zinc anodes are commonly used for pipeline protection in low-resistivity soils and seawater environments. They require no external power source, making them suitable for remote pipeline sections. Over time, zinc anodes are consumed and must be replaced to maintain adequate protection levels.

Alternative sacrificial anodes include magnesium (for higher-resistivity soils) and aluminum (for marine environments). Monitoring zinc anode performance is part of comprehensive cathodic protection management.

EMPIT’s CMI technology complements CP programs by detecting areas where cathodic protection may be insufficient — identifying active corrosion at coating defects where zinc anodes are unable to provide adequate protection, enabling targeted CP system optimization.