Corrosion and steel grounding

Author

Sen, Pankaj K. ; Mudarres, Nabeel K.

Author_Institution

Dept. of Electr. Eng. & Comput. Sci., Colorado Univ., Denver, CO, USA

fYear

1990

fDate

15-16 Oct 1990

Firstpage

162

Lastpage

170

Abstract

Based on the National Bureau of Standards statistical data on the corrosion of steel (M. Romanoff, 1957), an equation is developed to estimate the corrosion rate of underground steel that varies with soil resistivity, pH value, moisture and aeration. This formula, together with IEEE Standard 80-1986, is used in the design of steel grounding. formulae are also discussed on how to design proper cathodic protection methods to minimize corrosion of steel grounding. The typical corrosion rate of steel is 5-7 mils/year. A numerical example is discussed to enhance the understanding of steel grounding design for high voltage AC substations

Keywords

corrosion; corrosion protection; earth electrodes; power system protection; standards; steel; substations; AC substations; HV; IEEE Standard 80-1986; National Bureau of Standards; USA; aeration; cathodic protection; corrosion; design; earth electrodes; grounding; moisture; pH; power system protection; soil resistivity; steel; underground; Conductivity; Corrosion; Equations; Grounding; Moisture; NIST; Soil; Steel; Substation protection; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Symposium, 1990., Proceedings of the Twenty-Second Annual North American

Conference_Location

Auburn, AL

Print_ISBN

0-8186-2115-X

Type

conf

DOI

10.1109/NAPS.1990.151368

Filename

151368