One of the problems in the oil and gas industry is the corrosion of the aboveground tanks external bottom, which causes a lot of damage to these industries annually. Tanks external bottom cathodic protection is used as a complementary coating method to prevent this type of corrosion. The Tanks external bottom cathodic protection is accomplished in two ways: sacrificial anode and impressed current and can be temporary (short-term) or permanent (long-term). In the sacrificial anode cathodic protection method, usually is used magnesium or zinc anodes with the backfill, depending on the electrical resistivity of the soil. The impressed current cathodic protection method is used cast iron (HSCI) or mixed metal oxide (MMO) anodes depending on the required current rate and design life.
The internal corrosion of the aboveground tanks is one of the problems that causes many damages to the oil and gas industry annually. Tanks Internal cathodic protection is used as a complementary coating or sometimes independent method to prevent corrosion.
