Final answer:
In a galvanic cell, iron is always the metal that is attacked and oxidized when it is in contact with a more corrosion-resistant metal.
Step-by-step explanation:
A strong anodic galvanic cell is formed when iron is in direct contact with a more corrosion-resistant metal such as tin, copper, or lead. In this case, the iron is always the one that is attacked and oxidized. The corrosion occurs because the more corrosion-resistant metal acts as a cathode, accelerating the corrosion of iron by providing a large surface area for the reduction of oxygen. This process can be observed in cases where copper and iron pipes have been directly connected to each other in older homes.