- Title
- Modelling the long-term corrosion of cast iron pipes
- Creator
- Petersen, R. B.; Dafter, M.; Melchers, R. E.
- Relation
- Corrosion and Prevention 2013. Proceedings of Corrosion and Prevention 2013 (Brisbane, Qld 10-13 November, 2013)
- Publisher
- Australasian Corrosion Association (ACA)
- Resource Type
- conference paper
- Date
- 2013
- Description
- The external corrosion of buried cast iron water mains is a significant problem for the Australian Water Industry. To improve maintenance and replacement strategies for these mains the industry requires a method to estimate their remaining service lives. Predictions of long-term corrosion losses, pit depths and pitting extents are therefore required. A conceptual model for the prediction of long-term corrosion has been developed and the external soil conditions influencing corrosion were identified in a previous study. To calibrate the model, long-term data of corrosion (average loss and maximum penetration) and associated soil parameters for pipes in service is required. Field data has been collected at 18 condition assessment sites and two pipe replacement sites within Hunter Water Corporation’s network. This paper presents the field observations and measurements taken from these sites, the model calibration procedure and results of the calibration. The results show that the long-term maximum corrosion penetration increases with increasing soil wetness (measured using degree of saturation) over the observed range of degree of saturation (0.5 to 0.86). The initial model calibration produced model parameters for cast iron pipes buried at standard depths in relatively homogeneous, low-permeability, soils with degrees of saturation equal to 0.57, 0.66, and 0.76.
- Subject
- cast iron; pipe; soil; long-term; external corrosion; model
- Identifier
- http://hdl.handle.net/1959.13/1341369
- Identifier
- uon:28729
- Identifier
- ISBN:9781634394369
- Language
- eng
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