Turn unplanned shutdowns into scheduled shutdowns. Unplanned shutdowns due to corrosion cost the process industries billions of dollar p.a. and can cause very serious threats to safety. Predicting failure due to corrosion is complicated as it is a cumulative process, over widely varying periods of time depending on the process conditions. Some extremely corrosive process conditions are not possible to measure effectively. Using process simulation is an effective tool to predict corrosive process conditions and to provide a way of estimating cumulative corrosion.