Dynamic risk management of assets susceptible to pitting corrosion

This paper presents a methodology to assess and dynamically update the risk of process components affected by pitting corrosion. The proposed framework considers the time-dependent growth of pits and uses the non-homogenous Markov process to model the maximum pit depth. The developed pit depth model is incorporated into a limit state function to estimate the failure probability of affected components. Economic consequences are estimated considering both business and accidental losses due to failure. The estimated risk is updated using Bayesian analysis as new inspection data become available. Different risk management strategies including prevention, control and mitigation measures are also studied.