Zairyo-to-Kankyo
Online ISSN : 1881-9664
Print ISSN : 0917-0480
ISSN-L : 0917-0480
Rapid Communication Note
Basic Examination for the Prediction of Cathodic Current Density Flowing into Holiday of Buried Steel Pipe
Takao KitagawaKenichi Haraga
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2012 Volume 61 Issue 3 Pages 98-100

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Abstract

Cathodic protection has been widely applied to protect the holidays of buried steel pipes from corrosion. Since it is difficult to measure the density of cathode current flowing directly into the holidays, buried steel pipes are controled by the density of cathode current flowing into the probes attached on the pipes. If we can estimate the density of cathode current flowing into the holidays, it is possible to repair the holidays and to control cathodic protection precisely. We have constructed a theoretical equation with potential gradient on the earth in order to estimate the density of cathode current flowing into the holiday. Experiments using simulated pipes with holidays have proven the validity of our estimation method.

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© 2012 Japan Society of Corrosion Engineering
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