Galvanic corrosion occurs when two different metals are in electrical contact in the presence of an electrolyte, such as water. This process leads to one metal corroding faster than it would on its own, while the other metal is protected. The more reactive metal, known as the anode, loses electrons and deteriorates, while the less reactive metal, called the cathode, remains intact. This type of corrosion is commonly seen in marine environments, where saltwater acts as an effective electrolyte. To prevent galvanic corrosion, engineers often use protective coatings, sacrificial anodes, or select metals that are more compatible with each other.