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Production of medium-high voltage anode corrosive foil

A manufacturing method and anode foil technology, applied in capacitor electrodes, capacitor parts and other directions, can solve the problems of high manufacturing cost and environmental protection cost, unfavorable promotion, low output, etc., and achieve low production cost and environmental protection cost and good overall stability. , controllable effect

Inactive Publication Date: 2007-09-05
DONGGUAN HEC CONDENSER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method requires that the current density of the initial energization be large enough, which will not only bring a lot of negative effects due to the excessive heat generation of the foil before electrolysis, but also cause serious merging of holes on the foil surface during the first electrolysis, which is not conducive to guaranteeing the product. The appearance, capacity dispersion and increase its electrostatic capacity, and the speed is slower and the output is lower
[0003] In the process of chromic acid system, due to the strong corrosion ability of chromic acid itself, the amount of current required is not large, so there will be no serious problem of initial hole heating, but the strong corrosiveness of the corrosive solution itself has a strong impact on the foil. The appearance of the chip and the control of capacity dispersion are unfavorable, and the manufacturing cost and environmental protection cost are high, which is unfavorable for its promotion

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0045] Corrosion foil implementation scheme in the medium-pressure section: imported Showa CH99 model 110um thick light foil, at about 5wt%H3 PO 4 In the bath, the temperature is 50°C, and the treatment is 45Sec: After washing with water, it is charged with direct current in an electrolysis, and the current density is 0.25A / cm 2 , the temperature is 89°C, the treatment is 3×45Sec (a 3V electrolytic cell), and the electrolytic cell solution is composed of 25Wt% H 2 SO 4 +3.5Wt% HCL+1Wt% aluminum ion composition; after washing, treat in 4Wt% ammonia water for 45Sec, the temperature is 75°C; after washing, in 4Wt% NH 4 At 0.10A / cm in Cl secondary electrolyte 2 DC power plus electrolysis 2×(4×45)Sec (two electrolyzers, each tank 4V), the temperature is 90°C; after washing with water, in 3Wt%HNO 3 Medium treatment 45Sec, the temperature is 60 ° C; after washing with 8Wt% HNO 3 +0.1Wt% corrosion inhibitor in the three electrolytes at 0.15A / cm 2 DC power plus electrolysis (4×45+...

Embodiment 2

[0048] Implementation of corrosion foil in the high-pressure section: HEC 115um thickness light foil is used, and the cubic texture requirement is greater than 97%; after being treated with 2Wt% NaOH alkaline pretreatment solution at a temperature of 38°C for 50Sec, it is washed with water and continued to be washed with 3Wt% h 3 PO 4 Acidic treatment solution, at a temperature of 50°C, for 50Sec; after washing with water, apply DC power in an electrolysis with a current density of 0.30A / cm 2 , the temperature is 82°C, the treatment is 2×50Sec (a 2V electrolyzer), and the electrolyzer liquid is composed of 30Wt% H 2 SO 4 +3Wt% HCL+1Wt% aluminum ion composition; after washing, treat in 4Wt% ammonia water for 50Sec, the temperature is 75°C; after washing, in 4Wt% NH 4 At 0.10A / cm in Cl secondary electrolyte 2 DC power plus electrolysis (4×50+2×50) Sec (two electrolytic tanks, one tank 4V, one tank 2V), the temperature is 88 ° C: after washing in 3Wt% HNO 3 Medium treatment ...

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PUM

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Abstract

Production of high-voltage anode anti-corrosion foil is carried out by taking A1 with purity>99.99% and cubic tissue structure>=95% as raw materials, pre-treating, first electrolyzing, first intermediate treating, second electrolyzing, second intermediate treating, third electrolyzing and after-treating. It consists of phosphoric acid, hydrochloric acid, sulfuric acid and nitric acid etc. acid treating liquid, weak base and strong base etc. treating liquid, sulfuric acid, hydrochloric acid, nitric acid, weak-acid chlorine salt and corrosion inhibitor cell liquor. It has good appearance, better electrostatic capacity and capacity difference. It can be used for medium-high voltage section dendritic holes by cell-liquor different properties.

Description

Technical field: [0001] The invention belongs to a method for manufacturing a corroded foil for medium and high voltage anode foils. Background technique: [0002] For the manufacture of corroded foil for traditional medium and high voltage anode foil, the process flow of sulfuric acid system is mostly: light foil → pretreatment → water washing → first electrolysis (porous stage) → water washing → second electrolysis (pore expansion stage) → water washing → third electrolysis ( Hole expansion stage) → water washing → post-processing → water washing → pure water washing → drying → corroding foil (some companies do not need three electrolysis). The hole design method generally adopts tunnel-shaped holes, and the specific volume of the corroded foil is usually increased by increasing the hole density through the first hole. This method requires that the current density of the initial energization be large enough, which will not only bring a lot of negative effects due to the e...

Claims

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Application Information

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IPC IPC(8): C25F3/04H01G9/04
Inventor 陈锦雄
Owner DONGGUAN HEC CONDENSER CO LTD
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