March 2012, Vol. 239 No. 3

Features

Steel Pipe Native Potentials In Soils Affect CP Criteria

Soil resistivity, corrosivity and steel native potentials in soils are interrelated. A chart was developed in this work to quantitatively map the rule-of-thumb relationship between steel native or rest potentials and soil resistivity. This chart was validated with available literature data from independent sources and can be used to provide a rough estimate of the magnitude of polarization applied on buried steel pipes for a given soil resistivity and an off-potential measured. Polarization provides a more direct measure (than an off-potential) on the magnitude of corrosion rate reduction. The chart shows that meeting the -850 mV, -750 mV and -650 mV (vs. Cu/CuSO4) off-potential

Log in to view this article.

Not Yet A Subscriber? Here are Your Options.

1) Start a FREE TRIAL SUBSCRIPTION and gain access to all articles in the current issue of Pipeline & Gas Journal magazine.

2) Start your full access subscription to Pipeline & Gas Journal and gain UNLIMITED access to this article, the current issue, all past issues in the technical archive, access to all special reports, special focus supplements and more. Pricing start at $395/year.   

*Access will be granted the next business day.

 

Comments

{{ error }}
{{ comment.comment.Name }} • {{ comment.timeAgo }}
{{ comment.comment.Text }}