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在太阳能热发电站中,选择Al-12.07%Si作为储能材料,310S不锈钢作为储能容器,并将310S不锈钢沉浸在Al-12.07%Si中进行长达1080 h的腐蚀。通过SEM、EDAX、XRD方法分别对腐蚀后的试样腐蚀层形貌、腐蚀层的成分和腐蚀试样的物相进行分析。研究结果发现,310S不锈钢基体与腐蚀层交界面的形状较平整和规则,试样表面均出现了Fe2Al5和FeAl3相。随着腐蚀时间延长,腐蚀试样的失重和腐蚀层厚度逐渐稳定,试样的腐蚀速率下降。
In the solar thermal power station, Al-12.07% Si was selected as energy storage material, 310S stainless steel as energy storage container, and 310S stainless steel was immersed in Al-12.07% Si for up to 1080 h corrosion. The morphology of the corrosion layer, the composition of the corrosion layer and the phase of the corrosion sample were analyzed by SEM, EDAX and XRD respectively. The results show that the shape of interface between 310S stainless steel substrate and corrosion layer is flat and regular, and Fe2Al5 and FeAl3 phases appear on the surface of the sample. With the extension of the etching time, the weight loss of the corrosion sample and the thickness of the corrosion layer gradually stabilized, and the corrosion rate of the sample decreased.