Corrosion on Co2 removal unit

The corrosion problems encountered on a DEA plant for CO2 removal are described, and the causes of the corrosion phenomena have been examined. For this purpose the amine degradation and corrosion processes have been considered. Taking into account the above considerations, the corrosion causes have been identified. One of the main causes was the oxygen dissolved in the solution. The corrosion causes have been removed and some further preventions have been taken. As a result of the above interventions, the Fe dissolved in the solution has decreased to normal values. The amine degradation induced by the oxygen dissolved in the solution has been identified as the main cause of the corrosion. The oxygen has been removed and, as a result, the iron dissolved in the solution has decreased to normal values.