Evaluation of wall thinning rate of FAC and mass transfer coefficient in elbow

(9) relation between mass transfer and wall thinning rate

Abstract

Flow Accelerated Corrosion (FAC) is one of the issues to be noticed considerably in plant piping management. For the integrity and safety of the plant, the wall-thinning and thinning rate due to FAC should be predicted, and we hope to construct the model to predict the wall thinning rate. We have studied FAC from the view point of flow dynamics. The mass transfer coefficient is measured by the electrochemical method with the point electrode in concentrated boundary layer. The Re number dependence of wall tinning rate is compared with mass transfer.