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Crofer22APU铁素体不锈钢是固体燃料电池连接体的备选材料之一。通过增重法研究了Crofer22APU铁素体不锈钢在800℃空气中的抗高温氧化动力学,并结合X射线衍射(XRD)、扫描电镜(SEM)、能谱分析(EDS)等手段,对氧化膜的形貌和组成进行了分析。结果发现,Crofer22APU铁素体不锈钢在800℃下0～100h的平均氧化速率为0.032g/(m2.h);100～450h的平均氧化速率为0.0091g/(m2.h);450～550h的平均氧化速率为5.0×10-4g/(m2.h)。氧化膜分为内外两层,内层主要是含SiO2的氧化物,外层主要是含Cr2O3的氧化物。
Crofer22APU ferritic stainless steel solid fuel cell connector is one of the alternative materials. The oxidation kinetics of Crofer22APU ferritic stainless steel in air at 800 ℃ was studied by weight gain method. Combined with X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) The morphology and composition were analyzed. The results showed that the average oxidation rate of Crofer22APU ferritic stainless steel at 800 ℃ for 0 ~ 100h was 0.032g / (m2.h), the average oxidation rate was 0.0091g / (m2.h) for 100 ~ 450h, the average oxidation rate The average oxidation rate was 5.0 × 10-4 g / (m2.h). Oxide film is divided into two layers inside and outside, the inner layer is mainly SiO2 containing oxide, the outer layer is mainly Cr2O3 containing oxide.