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Underground Corrosion Model of Steel Pipelines Using In Situ Parameters of Soil

Lim, Kar Sing and Siti Nor Fariza, Mior Mohd Tahir and Nordin, Yahaya and Norhazilan, Md Noor and Azlan, Abdul Rahman (2015) Underground Corrosion Model of Steel Pipelines Using In Situ Parameters of Soil. Journal of Pressure Vessel Technology, 137 (5). pp. 1-6. ISSN 0094-9930 (print); 1528-8978 (online)

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Abstract

A simple yet practical model to estimate the time dependence of metal loss (ML) in underground pipelines has been developed considering the in situ soil parameters. These parameters are soil resistivity, pH, moisture content, chloride content, and salinity. The time dependence of the ML was modeled as Pmax ¼ ktn, where t is the time exposure, k is ML constant, and n is the corrosion growth pattern. The results of ML and in situ parameters were analyzed using statistical methods such as data screening, linear correlation analysis, principal component analysis, and multiple linear regressions. The best model revealed that k is principally influenced by ressistivity, and n appears to be correlated with chloride content. Model optimization was carried out by introducing several observation criteria, namely, water access, soil color, and soil texture. The addition of these factors has improved the initial accuracy of model to an R2 score of 0.960. As a conclusion, the developed model can provide immediate assessment of corrosion growth experienced by underground structures.

Item Type: Article
Additional Information: Paper No: PVT-14-1105
Uncontrolled Keywords: Underground pipeline, Corrosion model, in situ parameters, soil
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Faculty/Division: Faculty of Civil Engineering & Earth Resources
Depositing User: Mrs. Neng Sury Sulaiman
Date Deposited: 15 Apr 2015 03:28
Last Modified: 23 Apr 2018 06:24
URI: http://umpir.ump.edu.my/id/eprint/9034
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