抄録
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, it is important to clarify the wall-thinning and thinning rate due to FAC in pipe wall inspection. From previous study, FAC can be predicted by mass transfer coefficient and the coefficient was measured in the pipe behind the orifice under the turbulent condition by the numerical simulation and electrochemical method. In a plant, however, the pipe is connected complicatedly and complex flow may raise the risk of FAC. In this paper, we study mass transfer coefficient behind the orifice, which is located in the downstream of bend pipe. The mass transfer coefficient is evaluated by the numerical simulation through the analogy of heat transfer, and it is compared with the experimental data measured by the electrochemical method.
