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Underground corrosion model of steel pipelines using in situ parameters of soil

Mior Mohd. Tahir, Siti Nor Fariza and Yahaya, N. and Md. Noor, Norhazilan and Lim, Kar Sing and Abdul Rahman, Azlan (2015) Underground corrosion model of steel pipelines using in situ parameters of soil. Journal of Pressure Vessel Technology, Transactions of the ASME, 137 (5). ISSN 0094-9930

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Official URL: http://dx.doi.org/10.1115/1.4028424

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=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
Uncontrolled Keywords:corrosion model, in situ parameters
Subjects:T Technology > TA Engineering (General). Civil engineering (General)
Divisions:Civil Engineering
ID Code:55949
Deposited By: Muhamad Idham Sulong
Deposited On:27 Oct 2016 09:34
Last Modified:25 Aug 2017 10:46

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