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10066 Predicting the Effect of Soil Seasonal Change on High Ph Stress Corrosion Cracking Susceptibilty of Buried Pipelines

Picture for 10066 Predicting Effect of Soil Seasonal Change on High Ph Stress Corrosion Cracking Susceptibilty
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Product Number: 51300-10066-SG
ISBN: 10066 2010 CP
Author: Fengmei Song
Publication Date: 2010
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$20.00
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Soil seasonal change is believed to be one of the major factors that contribute to pipeline high pH stress corrosion cracking (SCC), although the specific role and mechanisms of the soil seasonal change in the pipeline high pH SCC susceptibility are not clearly understood. This study is aimed at investigating this role and the mechanisms of the soil seasonal change through mathematical modeling. The temporal and spatial variation, with soil seasonal change, of the solution chemistry and the pipe steel potential and corrosion rate in a coating disbonded region is explored. With the pipe potential at the holiday varied by soil seasonal wet and dry cycles, the model results suggest that the susceptible conditions of high pH SCC could be formed during soil wet seasons and seasonal transitions. Depending on the level of drought and the effectiveness of cathodic protection (CP) during dry seasons, the susceptible conditions of the pipe high pH SCC may or may not be possible to form.

Keywords: stress corrosion cracking, pipeline, cathodic protection, seasonal change, modeling
Soil seasonal change is believed to be one of the major factors that contribute to pipeline high pH stress corrosion cracking (SCC), although the specific role and mechanisms of the soil seasonal change in the pipeline high pH SCC susceptibility are not clearly understood. This study is aimed at investigating this role and the mechanisms of the soil seasonal change through mathematical modeling. The temporal and spatial variation, with soil seasonal change, of the solution chemistry and the pipe steel potential and corrosion rate in a coating disbonded region is explored. With the pipe potential at the holiday varied by soil seasonal wet and dry cycles, the model results suggest that the susceptible conditions of high pH SCC could be formed during soil wet seasons and seasonal transitions. Depending on the level of drought and the effectiveness of cathodic protection (CP) during dry seasons, the susceptible conditions of the pipe high pH SCC may or may not be possible to form.

Keywords: stress corrosion cracking, pipeline, cathodic protection, seasonal change, modeling
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