How is corrosion defined?

Corrosion is defined as the gradual decomposition of a material, typically a metal, due to chemical reactions in its environment. This process can involve the material reacting with moisture, oxygen, or other chemicals, resulting in the deterioration of the material over time. Corrosion can lead to significant structural damage and impair the performance of infrastructure, including drinking water systems, pipelines, and treatment facilities.

Understanding corrosion is critical for water operators because it affects the integrity and longevity of the materials used in water distribution and treatment systems. Effective corrosion control methods are essential for maintaining water quality and ensuring safe drinking water delivery. Increased awareness of corrosion also helps operators take preventive measures, such as the use of protective coatings or cathodic protection, to mitigate its effects.

The other options do not accurately define corrosion: the growth of beneficial bacteria pertains to biological processes; cleaning of water pipes refers to maintenance and sanitation, not decomposition; and the formation of floc is a process in water treatment for removing impurities, which again is unrelated to corrosion.