Corrosion occurs when this type of energy flows from one piece of metal to another:

Corrosion is primarily an electrochemical process that occurs when electrical energy flows between different metals. This flow of electrical energy can facilitate the reactions that lead to the deterioration of metal surfaces, especially in the presence of moisture and electrolytes. When two different metals are in contact, and there is a potential difference between them, it creates a galvanic cell where electrons move from the more anodic (less noble) metal to the more cathodic (more noble) metal. This transfer of electrons results in the oxidation of the anodic metal, leading to corrosion.

Understanding the role of electrical energy in corrosion is crucial for implementing protective measures, such as using coatings, galvanization, or cathodic protection to minimize the contact between dissimilar metals and the associated risks of corrosion.