论文部分内容阅读
研究了微量锰元素添加对高压电解电容器阳极用铝箔的点蚀行为以及腐蚀箔性质的影响。使用二次离子质谱仪分析了轧制及退火铝箔中锰的元素分布。结果表明,锰在铝箔中的深度分布随着锰含量的增加而变化,但退火后铝箔中形成的立方织构的体积分数保持稳定。随锰含量增加,锰在退火铝箔表面的偏聚趋势增强。在相同的加电腐蚀条件下,腐蚀后锰含量高的铝箔表面具有更高密度的方形点蚀孔,并且并孔更少,点蚀孔分布更加均匀。在所研究的范围内(2.3~14.7μg/g),在520 V形成的腐蚀箔的比电容随锰含量的增加而提高。
The effects of trace manganese addition on the pitting corrosion behavior and corrosion properties of aluminum foil for high voltage electrolytic capacitor anode were investigated. The elemental distribution of manganese in rolled and annealed aluminum foil was analyzed using secondary ion mass spectrometry. The results show that the depth distribution of manganese in the aluminum foil changes with the increase of manganese content, but the volume fraction of cubic texture formed in the aluminum foil after annealing remains stable. With the increase of manganese content, the trend of segregation of manganese on the surface of annealed aluminum foil is enhanced. Under the same power-on corrosion conditions, the surface of the aluminum foil with high manganese content after etching has a higher density of square pitting holes with fewer holes and a more uniform distribution of pitting holes. The specific capacitance of the eroded foil formed at 520 V increased with increasing Mn content in the range studied (2.3-14.7 μg / g).