What is the primary use of cathodic protection in water systems?

Cathodic protection is primarily utilized in water systems for corrosion control. The main goal of this technique is to protect metal surfaces, such as pipes, from corrosion, which can significantly compromise the integrity and longevity of water infrastructure.

Corrosion occurs when metal surfaces react with their environment, leading to deterioration. By applying cathodic protection, an electrical current is imposed on the metal structure, converting it into a cathode, which prevents the oxidation process that leads to corrosion. This is particularly important for underground pipelines and storage tanks that are often susceptible to corrosive elements.

The other options relate to different processes and concerns in water treatment. Filtration enhancement pertains to removing particulates and improving water clarity rather than preventing corrosion. pH adjustment is a treatment aimed at controlling acidity or alkalinity for managing various chemical processes and ensuring safe water quality. Hardness reduction involves removing minerals like calcium and magnesium that contribute to water hardness, which does not relate to the protective measures outlined in cathodic protection. Thus, the primary use of cathodic protection is indeed focused on corrosion control within water systems.