Cathodic Protection
Cathodic protection in electrical engineering is a corrosion prevention technique used to protect metal structures, such as pipelines, storage tanks, offshore platforms, and reinforced concrete, from electrochemical deterioration. It works by converting the protected metal into a cathode using either sacrificial anodes (galvanic protection) or impressed current systems. In galvanic cathodic protection, more reactive metals like zinc, magnesium, or aluminum serve as sacrificial anodes, corroding in place of the protected structure. Impressed current systems use external DC power sources with anodes made of materials like mixed metal oxides or graphite to provide controlled protection. Proper design, monitoring, and maintenance of cathodic protection systems ensure long-term durability and structural integrity. Regular testing with reference electrodes measures protection levels, ensuring effectiveness. Industries such as oil & gas, marine, and water treatment heavily rely on cathodic protection to prevent costly failures. Advanced monitoring systems with remote sensing technology enhance efficiency and minimize maintenance efforts.