What is a Galvanic Cell in relation to water systems?

A galvanic cell is indeed an electrochemical corrosion cell where two different metals are connected through an electrolyte, leading to a spontaneous redox reaction. In relation to water systems, this cell can play a significant role in the corrosion process that occurs within plumbing and water distribution systems.

When dissimilar metals come into contact in the presence of water (which acts as an electrolyte), one metal will corrode faster than the other due to the electrochemical reaction that generates a voltage. This phenomenon can be critical in understanding and managing corrosion issues in water lines and storage tanks, as it can lead to leaks and the degradation of infrastructure over time.

Understanding the behavior of galvanic cells helps water system operators implement appropriate preventive measures against corrosion, such as using cathodic protection, selecting compatible materials for pipelines, and maintaining proper water chemistry to minimize the risk of electrochemical reactions that can damage system components.