Classification of electronic aluminum foil

Electronic aluminum foil can be divided into high voltage anode foil, low voltage anode foil, negative foil and so on. The high voltage anode foil is columnar-hole corrosion, the low pressure anode foil is spongy corrosion, and the anode foil in the middle pressure section is moth-eaten corrosion.

High voltage anode foil can be divided into two categories, one is high quality high voltage foil; One is ordinary high-pressure foil. High quality high voltage anode foil is characterized by "two and one thin", that is, high purity, high cube texture and thin surface oxide film. This kind of product is of high quality, but the cost is high, the purity of aluminum is > 99.99%, the cubic texture is 96%, and the vacuum heat treatment is carried out under the conditions of 10-3pa ~ 10-5Pa. Ordinary high voltage anode foil is an economical and practical high voltage anode foil, aluminum purity > 99.98%, cubic texture > 92%, vacuum heat treatment in 10-1pa ~ 10-2pa conditions.

Negative foil has soft state and hard state. Japan is dominated by soft electrochemical corrosion, and Western Europe is dominated by hard chemical corrosion. Both have their advantages and disadvantages, soft state with high purity aluminum foil (> 99.85%), no copper, excellent quality, but the cost is also high; Hard state is used with low purity copper aluminum foil, low cost.