Corrosion method for expanding face of lead anode foils in branch holes
A technology of aluminum anodes and branches, applied in the direction of electrical components, electrolytic capacitors, capacitors, etc., can solve the problems of reducing the capacitance of aluminum anode foil, complex process and equipment, and small capacitance, and achieve the expansion of real surface area, large surface area and mechanical Intensity, dosage reduction effect
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Embodiment 1
[0029] A method for surface expansion and erosion of branch hole aluminum anode foil, comprising the following steps in sequence:
[0030] ①Put the aluminum foil in a solution containing Cl -1 The electrochemical erosion current is applied in the mixed acid solution of -1 Mixed acid was prepared by using 1.5mol / L HCl and 3mol / L H 2 SO 4 The treatment time was 3 minutes, the temperature of the mixed acid solution was 75 °C, and the current was pulsed direct current.
[0031] ②The aluminum foil treated in step ① was soaked and eroded in 0.1mol / L HCl solution, and ultrasonic waves were applied at the same time; the ultrasonic intensity was 100W, the erosion treatment time was 120 seconds, and the temperature of the HCl solution was 40°C.
[0032] ③ Place the aluminum foil processed in step ② in a Cl-containing solution adjusted to pH 2 with sodium oxalate / oxalic acid. -1 Erosion treatment in solution, applying ultrasonic waves at the same time, and applying electrochemical er...
Embodiment 2
[0035] A method for surface expansion and erosion of branch hole aluminum anode foil, comprising the following steps in sequence:
[0036] ①Put the aluminum foil in a solution containing Cl -1 The electrochemical erosion current is applied in the mixed acid solution of -1 Mixed acid is prepared by using 1.2mol / L HCl and 2mol / L H 2 SO 4 , 0.6mol / L HNO 3 The treatment time was 3 minutes, the temperature of the mixed acid solution was 60 °C, and the current was pulsed direct current.
[0037] ② Put the aluminum foil treated in step ① in 0.1mol / L H 3 PO 4 Soak erosion treatment with 0.1mol / L HF mixed solution, and apply ultrasonic waves at the same time; ultrasonic intensity is 120W, erosion treatment time is 80 seconds, and the temperature of HCl solution is 60 °C.
[0038] ③ Place the aluminum foil treated in step ② in a Cl-containing solution adjusted to pH 6 with borax / boric acid. -1 Erosion treatment in solution, while applying ultrasonic waves, and applying electroche...
Embodiment 3
[0041] A method for surface expansion and erosion of branch hole aluminum anode foil, comprising the following steps in sequence:
[0042] ①Put the aluminum foil in a solution containing Cl -1 The electrochemical erosion current is applied in the mixed acid solution of -1 Mixed acid is prepared by using 2mol / L KCl and 4mol / L H 3 PO 4 The treatment time was 2.5 minutes, the temperature of the mixed acid solution was 85°C, and the current was pulsed direct current.
[0043] ②The aluminum foil treated in step ① was soaked and eroded in 0.15mol / L HF solution, and ultrasonic waves were applied at the same time; the ultrasonic intensity was 150W, the erosion treatment time was 60 seconds, and the temperature of the HCl solution was 80°C.
[0044] ③Place the aluminum foil processed in step ② in a Cl-containing solution adjusted to pH 8 with phosphoric acid / sodium hydrogen phosphate. -1 Erosion treatment in solution, applying ultrasonic waves at the same time, and applying electro...
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