An investigation of iron concentration effects and modelling of flow accelerated corrosion
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Date
2017
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University of New Brunswick
Abstract
Flow accelerated corrosion (FAC) is an aggressive form of degradation in
power plant piping that leads to substantial wall thinning and sudden failures.
An interaction of a complex series of mechanisms, FAC is difficult
to detect, requiring predictive tools to identify susceptible components and
guide the deployment of mitigating measures.
An experimental investigation has been carried out examining the e↵ect of
changes in iron concentration on the rate of FAC. A sampling system and
process were developed to measure bulk iron concentration in concert with
measured FAC rates in an experimental probe at temperature.
The UNB mechanistic model has been updated to provide an improved response
to variations in bulk iron concentration. The model has also been
updated to respond more e↵ectively to mass transfer variations in order to
model complex geometry and highly turbulent flow.