What happens to galvanic corrosion when dissimilar metals are connected in a conductive environment?

When dissimilar metals are connected in a conductive environment, galvanic corrosion is likely to increase. This phenomenon occurs because galvanic corrosion relies on the electrochemical differences between two dissimilar metals. When they are in contact with each other and exposed to an electrolyte (such as seawater), one metal acts as the anode (the more active metal) and the other acts as the cathode (the less active metal).

The anode experiences a loss of electrons and subsequently corrodes, whereas the cathode gains those electrons and is protected from corrosion. The greater the potential difference between the two metals, the faster the corrosion rate of the anode will be. Factors such as the specific types of metals involved, the surface area in contact, and environmental conditions contribute to the degree of galvanic corrosion.

In scenarios where such dissimilar metals are connected in conductive environments, the conditions foster a more aggressive form of corrosion on the anode, leading to increased rates of deterioration. This understanding is crucial for marine applications, where choosing compatible materials and implementing proper isolation techniques can help mitigate the risk of galvanic corrosion.