A kind of High-specific-volumehigh-flex high-flex electrode foil corrosion manufacture method
Technical field
The invention belongs to electrode foil manufacturing process field, relate to capacitor electrode foil corrosion manufacture method, particularly to one
Plant High-specific-volumehigh-flex high-flex electrode foil corrosion manufacture method.
Background technology
In fields such as Aero-Space, vehicle frequency transformer, industrial frequency converters, high pressure, super-pressure etched foil there are urgent need
Asking, etched foil is again electrode foil, is the critical material manufacturing alminium electrolytic condenser, along with large-scale high power electronic equipment Market is continuous
Expand, the demand of various high pressure resistant jumbo electrochemical capacitors is steeply risen.
Increase electrode foil capacitance general principle be utilize corrosive liquid on electrode foil surface by electrochemical principle hair engaging aperture,
Reaming is to increase the surface area of electrode foil, thus improves the ability of electrode foil storage electric charge, hair engaging aperture, the uniformity of reaming and densification
Degree directly influences the capacity of electrode foil, but hair engaging aperture is excessively fine and close or reaming the most deeply, be then unfavorable for that the warpage of electrode foil is strong too greatly
Degree improves.
In current prior art, the pore space structure that corrosion is formed is complicated, deep mixed, aluminium core is uneven, causes folding
Qu Buneng meets the requirements.
Summary of the invention
Etched foil specific volume and warpage for overcoming prior art manufacture can not meet the technological deficiency of requirement, and the present invention is open
A kind of High-specific-volumehigh-flex high-flex electrode foil corrosion manufacture method.
A kind of High-specific-volumehigh-flex high-flex electrode foil corrosion manufacture method of the present invention, by impregnation steps, three grades add galvano-cautery
Step and post-processing step composition, described three grades power up corrosion step and are powered up the burn into second level by the first order and power up burn into the 3rd
Level powers up corrosion step composition, and the described first order adds the mixed solution that corrosive liquid is hydrochloric acid and sulfuric acid of galvano-cautery.
Use High-specific-volumehigh-flex high-flex electrode foil corrosion manufacture method of the present invention, use hydrochloric acid and sulfuric acid as corrosion
Liquid, the chlorion utilizing hydrochloric acid to ionize out carries out hair engaging aperture to aluminium foil, and pore space structure is protected by sulfuric acid, improves electrode foil folding
Bent.Simultaneously because hydrochloric acid degree of ionization is high, during corrosion, required voltage reduces, and reduces production cost.
Owing to sulfuric acid possesses stronger oxidisability, sulfuric acid and hydrochloric acid mixed solution is used to be conducive to removing the natural of aluminium foil surface
Oxide-film, improves reaction speed.
It is 0.6-0.7 mol/L that the described first order adds concentration of hydrochloric acid in the corrosive liquid of galvano-cautery, and described sulfuric acid concentration is
7.5-8.5 mol/L.
Pretreatment liquid in described impregnation steps is sodium hydroxide solution or phosphoric acid solution or hydrochloric acid and sulfuric acid mixed solution.
The main purpose of dipping is to pre-process aluminium foil surface, removes the oxide of aluminium foil surface, therefore uses oxygen
The stronger sodium hydroxide solution of the property changed or phosphoric acid or sulfuric acid and hydrochloric acid mixed solution.
Described sodium hydroxide solution is 1 mol/L, and reaction temperature can be 45 DEG C;Described phosphoric acid solution is 0.5 to rub
You/liter, reaction temperature can be 45 DEG C;Described hydrochloric acid is 1:6-20 with the molar ratio of sulfuric acid.
The described second level adds the hydrochloric acid solution that corrosive liquid is 1.8-2.3 mol/L of galvano-cautery, and temperature is 85 DEG C, or
1.1-1.3 mol/L salpeter solution, temperature is 69 DEG C.
Using hydrochloric acid solution to be applicable to manufacture the electrode foil manufacturing process being applied to below 600V, nitric acid is applicable to 601-
1000V electrode foil manufacturing process.
Further, the described second level add the reaction temperature of galvano-cautery use hydrochloric acid solution be 83-87 DEG C or nitric acid molten
It is 67-71 DEG C during liquid.
Temperature raises, although is conducive to reaction speed to accelerate, but owing to salpeter solution the most easily decomposes, therefore makes
The reaction temperature when less than use hydrochloric acid is controlled by reaction temperature during nitric acid.
The described second level adds galvano-cautery and/or the third level add the corrosive liquid of galvano-cautery adds kayexalate or
Sodium gluconate.
Kayexalate is water-soluble liquid at normal temperatures, is using hydrochloric acid or nitric acid to aluminium foil surface
When carrying out reaming, kayexalate is as catalyst, and the easy uniform adsorption of kayexalate molecule is at aluminium foil surface, salt
Acid or nitric acid corrosive aluminum foil at kayexalate absorption, the kayexalate aperture wall to having corroded and not by
The paper tinsel face of corrosion is protected, and makes hydrochloric acid or nitric acid more effective in aluminium foil surface reaming.Sodium gluconate is soluble in water consolidating
Body, sodium gluconate solution can also play the effect similar with kayexalate.
The ratio adding kayexalate or sodium gluconate in corrosive liquid is 0.14 liter/m.Can be preferable
Coordinate with hydrochloric acid or salpeter solution, reach in the uniform purpose of aluminium foil surface reaming.
The third level adds the salpeter solution that corrosive liquid is 1.1-1.3 mol/L of galvano-cautery.Use salpeter solution can be effective
Remove the absorption residual chlorine ion at aluminium foil surface.
Accompanying drawing explanation
Fig. 1 shows one detailed description of the invention schematic diagram of the present invention.
Detailed description of the invention
Below the detailed description of the invention of the present invention is described in further detail.
Embodiment 1
Dipping: by through excessive erosion, purity be that the high-field electrode aluminium foil of 99.99% is in temperature is 50 DEG C of pretreatment liquids
Impregnation process 2.5 minutes, pretreatment liquid is 0.5mol/L phosphoric acid solution;
The first order adds galvano-cautery: by through pretreated aluminium foil at the HCl and 8.5 mol/L of 0.65mol/L
H2SO4In mixed liquor, at 72 DEG C, front forcing voltage 5.5V, electric current 2.2KA/cm2, reverse side forcing voltage 7.8V, electric current
2.4KA/cm2Under conditions of, galvanic corrosion front, reverse side power-up time are 70S;
The second level adds galvano-cautery: will add the aluminium foil HCL Yu the 0.14L/ m at 1.8 mol/L of galvano-cautery through the first order3
Galvanic corrosion in the mixed solution of kayexalate, galvanic corrosion temperature is 87 DEG C, and wherein galvanic corrosion front, reverse side power-up time are
180 seconds;
The third level adds galvano-cautery: will add the aluminium foil HNO at 1.1mol/L of galvano-cautery through the second level3With 0.14L/ m3
Galvanic corrosion in the mixed solution of kayexalate, galvanic corrosion temperature is 69 DEG C, and galvanic corrosion front, reverse side power-up time are 180
Second;
Post processing: third time is added the H at 0.45 mol/L of the aluminium foil after galvano-cautery2SO4Solution, at a temperature of 45 DEG C after
Process 2 minutes, take out cleaning, dry.
The capacitance of the electrode foil that embodiment 1 obtains is: 520V tests, and specific volume is 0.77uf/cm2, warpage intensity is 65
Return.
Embodiment 2
Dipping: by through excessive erosion, purity be that the high-field electrode aluminium foil of 99.99% is in temperature is 55 DEG C of pretreatment liquids
Impregnation process 1.5 minutes, pretreatment liquid is hydrochloric acid and sulfuric acid mixed solution, and wherein hydrochloric acid is respectively with the concentration of sulfuric acid
0.65mol/L and 8.0mol/L;
The first order adds galvano-cautery: by through pretreated aluminium foil at the HCl and 8.0 mol/L of 0.65mol/L
H2SO4In mixed liquor, at 72 DEG C, front forcing voltage 5.8V, electric current 2.3KA/cm2, reverse side forcing voltage 8.2V, electric current
2.4KA/cm2Under conditions of, galvanic corrosion front, reverse side power-up time are 70S;
The second level adds galvano-cautery: will add the aluminium foil HCL Yu the 0.14L/ m at 1.9mol/L of galvano-cautery through the first order3 Poly-
Galvanic corrosion in the mixed solution of SSS, galvanic corrosion temperature is 83 DEG C, and wherein galvanic corrosion front, reverse side power-up time are 200
Second;
The third level adds galvano-cautery: will add the aluminium foil HNO at 1.2 mol/L of galvano-cautery through the second level3With 0.14L/ m3
Galvanic corrosion in the mixed solution of kayexalate, galvanic corrosion temperature is 69 DEG C, and galvanic corrosion front, reverse side power-up time are 200
Second;
Post processing: third time is added the H at 1.0 mol/L of the aluminium foil after galvano-cautery2SO4Solution, at a temperature of 45 DEG C after place
Manage 2 minutes, take out cleaning, dry.
The capacitance of the electrode foil that embodiment 2 obtains is: 520V tests, and specific volume is 0.76uf/cm2, warpage intensity is 70
Return.
Embodiment 3
Dipping: by through excessive erosion, purity be that the high-field electrode aluminium foil of 99.99% is in temperature is 55 DEG C of pretreatment liquids
Impregnation process 1.5 minutes, pretreatment liquid is hydrochloric acid and sulfuric acid mixed solution, and wherein hydrochloric acid is respectively with the concentration of sulfuric acid
0.63mol/L and 8.2mol/L;
The first order adds galvano-cautery: by through pretreated aluminium foil at the H of HCl Yu 8.2mol/L of 0.6mol/L2SO4
In mixed liquor, at 73 DEG C, front forcing voltage 5.8V, electric current 2.4KA/cm2, reverse side forcing voltage 8.0V, electric current 2.4KA/cm2
Under conditions of, galvanic corrosion front, reverse side power-up time are 60S;
The second level adds galvano-cautery: will add the aluminium foil HNO at 0.7mol/L of galvano-cautery through the first order3With 0.14L/ m3
Galvanic corrosion in the mixed solution of kayexalate, galvanic corrosion temperature is 69 DEG C, and wherein galvanic corrosion front, reverse side power-up time are
180 seconds;
The third level adds galvano-cautery: will add the aluminium foil HNO at 0.7 mol/L of galvano-cautery through the second level3With 0.14L/ m3
Galvanic corrosion in the mixed solution of kayexalate, galvanic corrosion temperature is 69 DEG C, and galvanic corrosion front, reverse side power-up time are 200
Second;
Post processing: third time is added the H at 0.45 mol/L of the aluminium foil after galvano-cautery2SO4Solution, at a temperature of 45 DEG C after
Process 2 minutes, take out cleaning, dry.
The electrode foil 520V test that embodiment 3 obtains, specific volume is 0.8uf/cm2, warpage intensity is 60 times.
Embodiment 4
Dipping: by through excessive erosion, purity be that the high-field electrode aluminium foil of 99.99% is in temperature is 45 DEG C of pretreatment liquids
Impregnation process 2 minutes, pretreatment liquid is hydrochloric acid and sulfuric acid mixed solution, and wherein hydrochloric acid is respectively 0.1mol/L with the concentration of sulfuric acid
And 0.2mol/L;
The first order adds galvano-cautery: by through pretreated aluminium foil at the HCl and 0.75 mol/L of 0.65mol/L
H2SO4In mixed liquor, at 73 DEG C, front forcing voltage 5.6V, electric current 2.4KA/cm2, reverse side forcing voltage 8.0V, electric current
2.4KA/cm2Under conditions of, galvanic corrosion front, reverse side power-up time are 60S;
The second level adds galvano-cautery: will add the aluminium foil HNO at 0.7 mol/L of galvano-cautery through the first order3With 0.14L/ m3
Galvanic corrosion in the mixed solution of kayexalate, galvanic corrosion temperature is 69 DEG C, and wherein galvanic corrosion front, reverse side power-up time are
210 seconds;
The third level adds galvano-cautery: will add the aluminium foil HNO at 0.4 mol/L of galvano-cautery through the second level3With 0.14L/ m3
Galvanic corrosion in the mixed solution of sodium gluconate, galvanic corrosion temperature is 69 DEG C, and galvanic corrosion front, reverse side power-up time are 210 seconds;
Post processing: third time is added the H at 0.45 mol/L of the aluminium foil after galvano-cautery2SO4Solution, at a temperature of 45 DEG C after
Process 2 minutes, take out cleaning, dry.
The electrode foil 520V test that embodiment 4 obtains, specific volume is 0.77uf/cm2, warpage intensity is 62 times.
Embodiment 5
Dipping: by through excessive erosion, purity be that the high-field electrode aluminium foil of 99.99% is in temperature is 55 DEG C of pretreatment liquids
Impregnation process 2 minutes, pretreatment liquid is hydrochloric acid and sulfuric acid mixed solution, and wherein hydrochloric acid is respectively 0.05mol/ with the concentration of sulfuric acid
L and 0.1mol/L;
The first order adds galvano-cautery: by through pretreated aluminium foil at the HCl and 0.85 mol/L of 0.65mol/L
H2SO4In mixed liquor, at 72 DEG C, front forcing voltage 5.6V, electric current 2.4KA/cm2, reverse side forcing voltage 8.0V, electric current
2.4KA/cm2Under conditions of, galvanic corrosion front, reverse side power-up time are 60S;
The second level adds galvano-cautery: will add the aluminium foil HNO at 0.7 mol/L of galvano-cautery through the first order3With 0.14L/ m3
Galvanic corrosion in the mixed solution of sodium gluconate, galvanic corrosion temperature is 69 DEG C, and wherein galvanic corrosion front, reverse side power-up time are 210 seconds;
The third level adds galvano-cautery: will add the aluminium foil HCL Yu the 0.14L/ m at 0.4 mol/L of galvano-cautery through the second level3
Galvanic corrosion in the mixed solution of sodium gluconate, galvanic corrosion temperature is 69 DEG C, and galvanic corrosion front, reverse side power-up time are 210 seconds;
Post processing: third time is added the H at 0.45 mol/L of the aluminium foil after galvano-cautery2SO4Solution, at a temperature of 45 DEG C after
Process 2 minutes, take out cleaning, dry.
The electrode foil 520V test that embodiment 5 obtains, specific volume is 0.80uf/cm2, warpage intensity is 55 times.
Use High-specific-volumehigh-flex high-flex electrode foil corrosion manufacture method of the present invention, use hydrochloric acid as corrosive liquid, profit
Aluminium foil is punched by the chlorion ionized out with hydrochloric acid, the oxide-film compact structure obtained, and chlorion punching uniformly, improves
Electrode foil warpage.Simultaneously because hydrochloric acid degree of ionization is high, during corrosion, required voltage reduces, and reduces production cost.
Use kayexalate as catalyst, the easy uniform adsorption of kayexalate molecule at aluminium foil surface,
Chlorion is corrosive aluminum foil at kayexalate absorption, makes in aluminium foil surface hair engaging aperture reaming evenly.
Previously described each preferred embodiment for the present invention, if the preferred embodiment in each preferred embodiment
Not being the most contradictory or premised on a certain preferred embodiment, each preferred embodiment can any stack combinations
Use, the design parameter in described embodiment and embodiment merely to clearly state the invention proof procedure of inventor, and
Being not used to limit the scope of patent protection of the present invention, the scope of patent protection of the present invention is still as the criterion with its claims, all
It is the equivalent structure change using the specification of the present invention and accompanying drawing content to be made, in like manner should be included in the protection model of the present invention
In enclosing.