Design of steel grounding system in a heavy industrial plant

Based on the National Institute of Standards and Technology statistical data on the corrosion of steel, an equation is developed to estimate the corrosion rate of underground steel that varies with resistivity, pH value, moisture content and aeration of the soil. This formula, together with the IEEE Standard No. 80-1986, is used in the design of steel grounding for a large heavy industrial plant. Formulas on how to design proper cathodic protection methods to minimize corrosion of steel grounding are discussed. A numerical example is presented to enhance the understanding