Abstract: The system and method for modeling corrosion-based multiphase flow friction in pipes is computer-implemented modeling software used to calculate the total pressure drop of a multiphase fluid flowing from an un-corroded portion of a pipe to a corroded portion of the pipe. In order to calculate the total pressure drop, gravitational deceleration, fluid deceleration, fluid friction and corrosion-based friction are each taken into account and included in the model. A conventional well, pipeline or the like is provided with a sensor, such as a fiber Bragg grating sensor or the like, for measuring an inner diameter of the pipe, and a sensor for measuring the coefficient of friction due to corrosion, such as an acoustic to resonant tensor cell tactile sensor or the like.