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1 前言 铝硅合金作为高密度的固-液相变储能材料,在热能储存技术中已获得实际应用,其关键技术之一就是控制铝硅溶体对容器材料的浸蚀。如将温度控制在铝硅合金的熔点附近(约600℃,低于铁铝共晶温度655℃),这时只能生成贫铁的铁铝硅三元合金体系,浸蚀层的扩散生长速度减小,从而使容器材料的抗浸能力大为提高。本工作研究了熔点附近,铝硅溶体对几种金属材料的浸蚀程度以及浸蚀层的成份分布情况并探讨表面氧化膜的影响。
1 Introduction Aluminum-silicon alloy as a high-density solid-liquid phase change energy storage material has gained practical application in thermal energy storage technology. One of the key technologies of aluminum-silicon alloy is to control the erosion of container materials by Al-Si solution. If the temperature is controlled in the vicinity of the melting point of Al-Si alloy (about 600 ℃, less than 655 ℃ of Fe-Al eutectic temperature), then only Fe-Al-Si alloy system can be formed. The diffusion growth rate Decrease, so that the anti-leaching capacity of the container material greatly improved. This work studied the melting point near the aluminum-silicon solution on the corrosion of several metal materials and the composition of the etching layer distribution and to explore the impact of the surface oxide film.