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.
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