Numerical analysis of electric field generated by imperfectly insulated buried pipeline

Author

Cristina, S. ; Feliziani, M.

Author_Institution

Dept. of Electr. Eng., L´´Aquila Univ., Italy

Volume

136

Issue

3

fYear

1989

fDate

5/1/1989 12:00:00 AM

Firstpage

121

Lastpage

126

Abstract

An analysis is carried out of the distribution of the electric potential and the electric field on the steel/soil contact surface of a buried pipe, caused by various coating defects. Electric potentials and electric fields are evaluated by means of a numerical computation procedure based on the finite-element method; in the calculations, a two-dimensional approximation is assumed and the effects of polarisation are neglected. The results of the analysis performed in the paper provide information, on which defects must be considered the most dangerous from the corrosion aspect, and show the effects on the electric potential distribution of the defect location on the cross-section of the pipe.<>

Keywords

corrosion protection; electric fields; electromagnetic field theory; finite element analysis; insulating coatings; coating defects; cross-section; defect location; electric field; electric potential; finite-element method; imperfectly insulated buried pipeline; numerical computation; polarisation; steel/soil contact surface; two-dimensional approximation; Coatings; Corrosion; Electric fields; Electromagnetic fields; Finite element methods; Insulation;

fLanguage

English

Journal_Title

Physical Science, Measurement and Instrumentation, Management and Education, IEE Proceedings A

Publisher

iet

ISSN

0143-702X

Type

jour

Filename

18923