Authors : E.S. Edori, O.S. Edori and D. Bekee
Abstract: This study presents the development of a model that predicts the general corrosion rates of the boiler compartments. The model uses the principle of material balance in the boiler system to predict the internal corrosion rates of the boiler compartments tubes which has been recorded by Ultrasonic Thickness Scanning technique (UTS) for a period of 4 years. A comparison of the results from the predictive model equation is made with that from the ultrasonic thickness scanning technique for suction air duct, bank tubes and desuperheater coils. The metal loss in suction air duct was; 0.54-1.8 mm from UTS reading while that from the model was 0.06-1.98 mm, metal loss in bank tubes was 0.025-0.30 mm from UTS reading while that from the model was; 0.026-0.28 mm and metal loss from desuperheater coil was 0.25-3.30 mm, from UTS reading while that from the model is between 0.32-3.79 mm. The percentage deviation of the model from the UTS reading was calculated to show agreement between the two results. The capability of the model has been demonstrated by using it to predict the internal corrosion rates of the three boiler compartments of the refinery boiler.
E.S. Edori, O.S. Edori and D. Bekee, 2014. Predictive Model of Corrosion Rates in Refinery Boiler Compartments (Suction Air Duct, Bank Tubes and Desuperheater Coils). Journal of Engineering and Applied Sciences, 9: 39-42.