Factors Affecting Corrosion of Buried Cast Iron Pipes

Published on Nov 1, 2018in Journal of Materials in Civil Engineering2.169
· DOI :10.1061/(ASCE)MT.1943-5533.0002461
Weigang Wang5
Estimated H-index: 5
(RMIT: RMIT University),
Dilan Robert12
Estimated H-index: 12
(RMIT: RMIT University)
+ 1 AuthorsChun-Qing Li10
Estimated H-index: 10
(RMIT: RMIT University)
Sources
Abstract
Although corrosion of metal in soils has been intensively investigated in the past, a review of the published literature shows that limited research has been undertaken to understand how soil properties affect the corrosion behavior of cast iron pipes, owing to the scarcity of the reported information on buried metal corrosion in its backfill soil condition. In this paper, a methodology is proposed to statistically analyze the effects of soil properties on corrosion behavior, and a comprehensive and long-term historical corrosion database of buried cast iron pipes is thoroughly interpreted. The corrosion is characterized by two time-independent parameters in each sample, that is, the proportionality (k) and exponent (n) factors of the power law model. It is found that the exponent factor n of power law model is closely associated with the level of soil aeration. It is also found that grouping corrosion data based on soil aeration produces stronger correlations between soil properties and corrosion rates compared with that when taking all soil samples as a whole. The authors conclude that an appropriate classification of soils can benefit the identification of key factors influencing corrosion of buried cast iron pipes at different exposure times. This research provides further knowledge for asset managers and engineers to accurately predict the failure of corrosion-affected cast iron pipes.
📖 Papers frequently viewed together
210 Citations
4 Citations
4 Citations
References0
Newest
Cited By6
Newest
#1Weigang Wang (RMIT: RMIT University)H-Index: 5
#2Wei Yang (University of Melbourne)H-Index: 23
Last. Chun-Qing Li (RMIT: RMIT University)H-Index: 22
view all 4 authors...
AbstractCorrosion of metal in soils has been intensively investigated in the past. However, a review of the published literature shows that there are challenges for researchers to accurately predic...
Source
#1Hosni M. Ezuber (UOB: University of Bahrain)H-Index: 8
#2A. F. Alshater (UOB: University of Bahrain)H-Index: 6
Last. Ali El-Basir (University of Tripoli)H-Index: 1
view all 4 authors...
External corrosion of underground steel structures is a major environmental and economic burden. The severity of such detriment depends on many factors that encompass: soil properties, moisture content, total soluble salts, the presence of microorganism, and method of metal protection. The investigative endeavor put forth bestows prime attention to the effect of soil attributes and moisture loading on the corrosion of submerged steel structures. The exposure to four discrete soil types (saline, ...
4 CitationsSource
#1Weigang Wang (RMIT: RMIT University)H-Index: 5
#2Yanlin Wang (RMIT: RMIT University)H-Index: 2
Last. Chun-Qing Li (RMIT: RMIT University)H-Index: 22
view all 5 authors...
Abstract Buried pipes, as a significant civil infrastructure, play a vital role in water, oil and gas transports. In this paper, a systematic method is developed to accurately predict the failure probability of a buried pipeline network at various levels of failure mode, pipe segment and whole pipeline system. A framework of system reliability is proposed to integrate the ultimate and serviceability failures. The random field theory is employed to model the distribution of corrosion, considering...
Source
#1Changkyu Kim (A&M: Texas A&M University)H-Index: 3
#2Lin Chen (A&M: Texas A&M University)
Last. Homero Castaneda (A&M: Texas A&M University)H-Index: 16
view all 4 authors...
External corrosion assessments of pipeline systems encompass two critical factors: time and space (location). Field measurement databases, laboratory testing, and theoretical prediction studies have been reported, based on continuous monitoring, survey and on-site characterization techniques, and controlled and simulated laboratory-scale environment studies. Theoretical models have identified several critical factors in assessing external corrosion for buried structures at different scales. This...
1 CitationsSource
#1Jingyang LiH-Index: 1
#2Cong MenH-Index: 1
Last. Ruimin LiuH-Index: 1
view all 5 authors...
Q235 carbon steel is one of the most widely used carbon steels, and soil corrosion and failures of it caused accidents, casualties, and great financial losses. Corrosion of Q235 carbon steel differed in spatial because of spatial variation in soil environmental factors. However, the national scale spatial pattern of soil corrosion of Q235 carbon steel across China has not been explored. The values of 12 impact factors, corrosion rate, and pitting corrosion rate at 25 sites covered all soil types...
2 CitationsSource
#1Weigang Wang (RMIT: RMIT University)H-Index: 5
#2Wenhai Shi (RMIT: RMIT University)H-Index: 3
Last. Chun-Qing Li (RMIT: RMIT University)H-Index: 22
view all 3 authors...
Abstract In this paper, a method is developed to evaluate the probability of fracture failure of pressurized cast iron pipes subjected to pitting corrosion. A new model for corrosion pit depth is developed which considers the correlation between model parameters. The first passage probability method is employed to quantify the probability of fracture failure where the failure criterion is established based on fracture mechanics and the stress intensity factor is modeled as a nonstationary lognor...
9 CitationsSource