The structures and phase compositions of highly-alloyed corrosion-resistant cast irons ChKh22 and ChKh20M, and also stainless steels 10Kh24N19G2M (austenitic) and 20Kh28N8AM3D3S (austenitic-ferritic) are studied by optical and scanning electron microscopy, x-ray diffraction analysis, and hardness measurement. Variation of the phase composition during steel crystallization is analyzed. Corrosion behavior of the alloys in a 3% aqueous NaCl solution is studied by potentiometric and potentiodynamic analysis, and frequency response spectroscopy methods. Recommendations are developed for use of the alloys for preparing chemical pump components. Heat treatment regimes are proposed for improving alloy resistance to overall, pitting, and intergranular corrosion, corrosion cracking, and corrosion-erosion.

中文翻译：

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化工生产泵用高铬铸铁和不锈钢的组织和性能研究

通过光学和扫描电子显微镜、X 射线衍射分析和硬度研究高合金耐腐蚀铸铁 ChKh22 和 ChKh20M，以及不锈钢 10Kh24N19G2M（奥氏体）和 20Kh28N8AM3D3S（奥氏体-铁素体）的结构和相组成测量。分析了钢结晶过程中相组成的变化。通过电位和动电位分析以及频率响应光谱方法研究了合金在 3% NaCl 水溶液中的腐蚀行为。制定了使用合金制备化学泵组件的建议。提出了热处理制度以提高合金对整体腐蚀、点蚀和晶间腐蚀、腐蚀开裂和腐蚀侵蚀的抵抗力。