Electrochemical corrosive process of anode aluminum foil
An anode aluminum foil, electrochemical technology, applied in the direction of capacitor electrodes, capacitor parts, etc., can solve the problems of unsuitability for high-voltage aluminum electrolytic capacitors, poor mechanical strength of aluminum foil, inconvenient operation and management, etc., and achieve uniform appearance and improved mechanical strength , good water resistance
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Embodiment 1
[0020] Use a specific type of electronic optical foil with an aluminum content greater than 99.9% and a cubic texture greater than 98%. After proper pretreatment to remove the grease on the surface of the foil, perform two electrochemical corrosions: the first electrochemical corrosion solution The mass percentage of sulfuric acid in the medium is 30%, the chloride ion is added in the form of hydrochloric acid, the mass percentage is 4.0%, the solution temperature is 75.0°C, and the current density applied on the aluminum foil is 0.50A / cm 2 . The mass percentage of chloride ions in the second electrochemical corrosion solution is 6.0%, the added ATMP mass percentage is about 0.61%, the solution temperature is 85°C, and the current density applied on the aluminum foil is 0.10A / cm 2 .
Embodiment 2
[0022] Use a specific type of electronic optical foil with an aluminum content greater than 99.9% and a cubic texture greater than 98%. After proper pretreatment to remove the grease on the surface of the foil, perform two electrochemical corrosions: the first electrochemical corrosion solution The mass percentage of sulfuric acid in the medium is 30%, the chloride ion is added in the form of ammonium chloride, its mass percentage is 5.9%, the solution temperature is 75.0°C, and the current density applied on the aluminum foil is 0.50A / cm 2 . The mass percentage of chloride ions in the second electrochemical corrosion solution is 6.0%, the added HEDP mass percentage is about 0.42%, the solution temperature is 85°C, and the current density applied on the aluminum foil is 0.10A / cm 2 .
Embodiment 3
[0024] Use a specific type of electronic optical foil with an aluminum content greater than 99.9% and a cubic texture greater than 98%. After proper pretreatment to remove the grease on the surface of the foil, perform two electrochemical corrosions: the first electrochemical corrosion solution The mass percentage of sulfuric acid in the medium is 30%, the chloride ion is added in the form of sodium chloride, its mass percentage is 6.4%, the solution temperature is 75.0°C, and the current density applied on the aluminum foil is 0.50A / cm 2 . The mass percentage of chloride ions in the second electrochemical corrosion solution is 6.0%, the added EDTMP mass percentage is about 0.94%, the solution temperature is 85°C, and the current density applied on the aluminum foil is 0.10A / cm 2 .
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