Explain the sacrificial anode approach to protecting steel s

Explain the \"sacrificial anode\" approach to protecting steel structures from deterioration due to corrosion.

Solution

the use of sacrificial anodes does not require an external power supply. It utilizes the natural tendency of electron flow from negative to positive potential to drive the current. This phenomenon was described earlier in the form of galvanic corrosion; therefore sacrificial anodes are often referred to as galvanic action. electrons are supplied to the protected structure by the anode via an electrical connection. Reactions at the anode driven by the environment produce metal ions that then act as positive current that flows towards the structure to complete the circuit. In practice, the anode is commonly mounted on a steel core and attached directly
to the structure.