Corrosion simulation via coupling computational fluid dynamics and NORSOK CO2 corrosion rate prediction model for an outlet header piping of an air-cooled heat exchanger

•CO2 corrosion of outlet of an air cooler in a gas dehydration unit was simulated.•Corrosion rate was calculated via coupling CFD and NORSOK CO2 corrosion model.•Fluid streamline, hydrodynamic flow parameters, temperature profile were calculated.•A three-dimensional regional corrosion rate map was obtained.•The corrosion simulation was in good agreement with filed observation.