Fatigue Strength of Multiphase Pump Components under the Influence of Pitting Corrosion

In extremely corrosive environments a corrosive attack of pump-components, i.e. by corrosion pits, might take place. A reduction of the pump-component's fatigue strength is the consequence of the attack.  This paper presents a new method to incorporate the effects of corrosion pits in the analytical strength assessment, in order to build the pumps more efficient and reliable for these operating conditions. The proposed calculation method is verified using a series of fatigue tests with pre-corroded specimen.