There are eleven steps in the manufacturing Aluminum electrolytic capacitor manufacturing process, and each step is critical. Step 1: Corrosion of aluminum foil. The manufacturing essentials of aluminum foil.
As previously mentioned, an aluminum electrolytic capacitor is constructed by using two strips of aluminum foil (anode and cathode) with paper interleaved. This foil and paper are then wound into an element and impregnated with electrolyte. The construction of an aluminum electrolytic capacitor is illustrated in Fig.1-1.
Step 1: Corrosion of aluminum foil. The manufacturing essentials of aluminum foil. In order to increase the area of war between the aluminum foil and the electrolyte, the appearance of the aluminum foil in the capacitor is not smooth. Instead, the appearance is formed into a rugged and unyielding shape by electrochemical corrosion.
Aging is the last step in the production of capacitors. In this process, a DC voltage greater than the rated voltage but less than the forming voltage will be applied. Generally, it will be carried out at the rated temperature of the capacitor (maybe at other temperatures or even room temperature).