Judicious selection of the material used for the stages of an electric submersible pump (ESP) is crucial for a prolonged service life. Working in high-velocity fluids carrying solid particles, the stage surfaces are subjected to solid particle impingement and thus erosion defects arise. Moreover, subsequent erosion-corrosion synergy brings additional threats to the ESPs operating in corrosive environments. In this report, jet impingement tests were conducted to evaluate the performance of three alloys under erosive and corrosive conditions. The tested materials include two Ni-Resist cast irons — wear-resistant materials commonly used for ESP stages — and one superduplex stainless steel (SDSS) that is famous for high strength and extraordinary corrosion resistance. The erosion rate of each material, along with its dependence on jet impingement angle, is quantified in terms of overall volume loss and localized depth loss. Tap water and salt solution are used as particle carrier in parallel to study the synergy between erosion and corrosion. The erosion mechanism of different phases, as well as its dependence on particle impingement conditions, are discussed. Finally, the applicability of substituting Ni-Resist cast irons with SDSS to cope with highly corrosive conditions is assessed based on the experiment results.

明智地选择用于潜水电泵（ESP）的材料对于延长使用寿命至关重要。在载有固体颗粒的高速流体中工作时，工作台表面会受到固体颗粒的撞击，因此会产生腐蚀缺陷。而且，随后的腐蚀-腐蚀协同作用给在腐蚀环境中运行的ESP带来了其他威胁。在此报告中，进行了射流冲击测试，以评估三种合金在侵蚀和腐蚀条件下的性能。经过测试的材料包括两种Ni-Resist铸铁（通常用于ESP阶段的耐磨材料）和一种以高强度和出色的耐腐蚀性而闻名的超级双相不锈钢（SDSS）。每种材料的腐蚀率，连同其对射流撞击角度的依赖关系，可通过整体体积损失和局部深度损失来量化。同时使用自来水和盐溶液作为颗粒载体，以研究腐蚀和腐蚀之间的协同作用。讨论了不同相的腐蚀机理及其对粒子撞击条件的依赖性。最后，根据实验结果评估了用SDSS代替Ni-Resist铸铁来应对高腐蚀性条件的适用性。