Pros of impressed current cathodic protection include greater control and adjustability of the protective current, suitable for larger structures or areas with high corrosion risk., and longer-lasting protection compared to galvanic systems.
However, there are also some cons to consider. Higher initial installation and maintenance costs, requires regular monitoring and maintenance to ensure proper functioning, and potential for overprotection, which can lead to hydrogen embrittlement or other issues.
Impressed current cathodic protection is recommended when galvanic protection is not sufficient to provide the required level of corrosion prevention, especially in high-risk environments or critical infrastructure where precise control over the protective current is necessary. It is often used in industries such as oil and gas, marine, and transportation to protect vital structures from corrosion and extend their service life.