Which physical factors may influence UST corrosion?

Soil type and moisture content are significant physical factors that influence corrosion in underground storage tanks (USTs). The composition of the soil plays a crucial role in determining the conductivity and corrosiveness of the environment surrounding the tank. For instance, soils rich in salts or that retain moisture can lead to increased corrosion rates due to electrolytic activity. High moisture content facilitates the formation of an electrolyte, which can expedite the corrosion process. Additionally, certain soil types may contain microorganisms that can also contribute to the corrosion of metal surfaces.

Understanding these factors is vital in selecting appropriate materials and corrosion protection measures for USTs to enhance their longevity and functionality. Ensuring that USTs are installed in optimal soil conditions, along with implementing additional protective measures like cathodic protection, can mitigate the risks associated with corrosion.