The paper analyzes two types of alloyed cast iron used for pump impellers operated in mine working conditions. The research on corrosion resistance of two cast iron grades resistant to abrasive wear was presented. Tests were performed for chromium cast iron (HCCI) grade EN-GJN HV600 (XCr18) (acc. to EN 12513) and high-silicon cast iron HSCI Grade 1 (acc. to ASTM A 518/ A 518M - 99). Deposit mining is characterized by variable working conditions. Both types of cast iron are resistant to abrasive wear and are suitable for loaded elements (e.g. pump impellers). The paper presents a metallographic analysis of selected cast iron grades based on light microscopy. The chemical composition of the tested cast irons was determined with the Leco GDS 500 spectrometer; C and S content was determined with the CS125 Leco Carbon–Sulfur Determinator. The Si content for HSCI Grade 1 was determined by gravimetric method. Corrosion tests were performed under laboratory conditions. In-service tests of cast impellers were performed under real conditions (working mines applications). Corrosion resistance tests were measured with VoltaLab^® Potentiostat (PGP 201). Performed tests resulted in the determination of the usefulness of materials used for dewatering pump impellers in mine working conditions. The results of laboratory tests were verified under the operating conditions of cast impellers. In the conditions of transporting a liquid-solid mixture at the moment of appearance of impurities (e.g. chlorine impurities) in the liquid, the impellers from cast iron HCCI revealed a tendency to pitting corrosion, which explains the exploitation results collected in the mining. After laboratory tests for sample from HCCI, the low value of breakdown potential E_b and repassivation E_cp was concluded which says about the absence of pitting corrosion resistance.

本文分析了在矿山工作条件下运行的泵叶轮使用的两种类型的合金铸铁。提出了两种耐磨损的铸铁牌号的耐蚀性研究。对铬铸铁（HCCI）级EN-GJN HV600（XCr18）（根据EN 12513）和高硅铸铁HSCI 1级（根据ASTM A 518 / A 518M-99）进行了测试。矿床开采的特点是工作条件可变。两种类型的铸铁都具有耐磨损性，并且适用于负载元件（例如泵叶轮）。本文介绍了根据光学显微镜对所选铸铁牌号进行的金相分析。用Leco GDS 500光谱仪测定被测铸铁的化学成分。使用CS125 Leco碳硫测定仪测定C和S含量。HSCI 1级的硅含量通过重量分析法测定。腐蚀试验是在实验室条件下进行的。铸造叶轮的在役测试是在真实条件下进行的（矿山作业中的应用）。耐腐蚀性测试是通过VoltaLab进行的^®恒电位仪（PGP 201）。进行的测试确定了在矿山工作条件下用于脱水泵叶轮的材料的有用性。实验室测试的结果在铸造叶轮的工作条件下得到了验证。在液体中出现杂质（例如氯杂质）时，在运输液固混合物的条件下，HCCI铸铁的叶轮显示出点蚀的趋势，这解释了采矿中收集的开采结果。在对HCCI样品进行实验室测试后，得出了较低的击穿电位E _b和重新钝化E _cp值，这表明没有耐点蚀性。