A Method for Reducing the Leakage Current of Medium and High Voltage Forming Foil
A technology of forming foil and leakage current, applied to circuits, capacitors, electrical components, etc., can solve problems such as large leakage current
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Embodiment 1
[0103] 1) Pre-treatment: use a medium-high pressure corrosion foil with a thickness of 120 μm, boil it in pure water at 100°C for 12 minutes, then immerse it in a citric acid solution with a concentration of 0.6wt% and a temperature of 70°C for 10 minutes;
[0104] 2) Four-stage chemical formation: anodize the pretreated foil in an aqueous solution of 5wt% boric acid + 0.6wt% ammonium borate at 85°C, with a current density of 30mA / cm 2 , the constant current boost reaches 180V, and the constant voltage is maintained for 10 minutes; then anodic oxidation treatment is performed at 85°C in an aqueous solution of 5wt% boric acid + 0.4wt% ammonium borate, and the current density is 30mA / cm 2 , the constant current boost reaches 360V, and the constant voltage is maintained for 10 minutes; then anodic oxidation treatment is performed at 85°C in an aqueous solution of 5wt% boric acid + 0.2wt% ammonium borate, and the current density is 30mA / cm 2 , the constant current boost reaches 52...
Embodiment 2
[0115] 1) Pre-treatment: use a medium-high pressure corrosion foil with a thickness of 120 μm, boil it in pure water at 100°C for 12 minutes; then immerse it in a fumaric acid solution with a concentration of 0.9wt% and a temperature of 80°C for 10 minutes;
[0116] Steps 2)-11) are the same as in Example 1.
Embodiment 3
[0118] 1) Pretreatment: use a medium-high pressure corrosion foil with a thickness of 120 μm, boil it in pure water at 100°C for 12 minutes; then immerse it in an ammonium pentaborate solution with a concentration of 0.4wt% and a temperature of 80°C for 8 minutes;
[0119] Steps 2)-11) are the same as in Example 1.
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