Rotating components in pumps are subjected to a high degree of wear when multiphase fluids containing corrosive elements as well as erosive particles are transported. The wear of these components leads to an increasing loss of efficiency and eventually to the failure of the pump. If the pump is to be used as a stand-alone system such as in ultradeep subsea applications in the oil and gas production industry, the wear has to be minimized. In this paper the wear resistance of USN S43100 steel as a rotating test sample with and without erosive particles in standardised formation water with CO2 is investigated at controlled potentials around the corrosion potential on both the anodic and the cathodic side. As a result it will be shown, that the metal loss of a rotating component is ten times higher than the metal loss of a identical, fixed component in the same environment. Furthermore it will be shown, that the corrosion potential is greatly influenced by the presence of erosive particles. In the case of anodic dissolution, pitting corrosion was found to be the prevalent cause for the metal loss.

Subject
Wear, Water, Materials, Electrochemical cells, Sand, Corrosion currents, Metal loss, Screws, Fluids, Weight loss, Steel, Erosion corrosion, Corrosion potential
Keywords:
turbulent flow, erosion-corrosion, corrosion, CO2, multiphase, pumps, rotating components
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2010
Association for Materials Protection and Performance (AMPP)
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