Cebulski Janusz, Pasek Dorota, Popczyk Magdalena, Swinarew Andrzej, Gabor Jadwiga
Department of Materials Technology, Faculty of Materials Engineering, Silesian University of Technology, Krasińskiego 8, 40-019 Katowice, Poland.
Promobil s.c., Kopernika 12, 40-064 Katowice, Poland.
Materials (Basel). 2025 Jan 11;18(2):308. doi: 10.3390/ma18020308.
This article shows the results of research conducted on the corrosion resistance of the FeAl (Fe40Al5Cr0.2TiB) alloy in two variants: the alloy after casting and after homogenization annealing (1000 °C, 93 h). Analysis of the microstructure of these alloys was conducted on the light microscope, and the phase composition was determined by X-ray diffraction. Resistance to electrochemical corrosion was tested in a 5% NaCl solution using the potentiodynamic polarization technique and electrochemical impedance spectroscopy. The surface of alloys after corrosion tests was examined by scanning electron microscopy. Chemical composition tests were conducted using an energy-dispersive X-ray spectrometer. The structure analysis was made with an electron backscatter diffraction detector. Based on the studies, it was found that the corrosion resistance of the FeAl alloy after homogenization annealing was higher than that of the FeAl alloy after casting. This alloy showed a more non-homogeneous and coarse-grained microstructure compared to the alloy after homogenization annealing. The investigation of the surface condition of FeAl alloys after corrosion tests showed the presence of pits, particularly in the case of the alloy after casting.
本文展示了对FeAl（Fe40Al5Cr0.2TiB）合金两种变体的耐腐蚀性研究结果：铸造后的合金和均匀化退火（1000°C，93小时）后的合金。在光学显微镜上对这些合金的微观结构进行了分析，并通过X射线衍射确定了相组成。使用动电位极化技术和电化学阻抗谱在5%氯化钠溶液中测试了耐电化学腐蚀性。腐蚀试验后合金的表面通过扫描电子显微镜进行了检查。使用能量色散X射线光谱仪进行了化学成分测试。用电子背散射衍射探测器进行了结构分析。基于这些研究，发现均匀化退火后的FeAl合金的耐腐蚀性高于铸造后的FeAl合金。与均匀化退火后的合金相比，这种合金显示出更不均匀和粗晶粒的微观结构。对FeAl合金腐蚀试验后的表面状况调查表明存在凹坑，特别是铸造后的合金情况。
