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CN-121992412-A - Corrosion inhibitor for manufacturing corrosion foil and aluminum foil corrosion method

CN121992412ACN 121992412 ACN121992412 ACN 121992412ACN-121992412-A

Abstract

The invention relates to a corrosion inhibitor for manufacturing corrosion foil and an aluminum foil corrosion method. A corrosion inhibitor for preparing corrosion foil is prepared from furben acid, sodium dodecylbenzene sulfonate or sodium dodecylsulfate. According to the corrosion inhibitor for manufacturing the corrosion foil and the aluminum foil corrosion method, the furben-zene acid and the sodium dodecyl benzene sulfonate or the sodium dodecyl sulfate are compounded, so that over corrosion can be effectively inhibited, and meanwhile, the specific capacitance can be increased.

Inventors

  • LI JIANGBING
  • LI CHANGSONG
  • WANG YANG
  • SHEN LIN
  • WU ZHENGLEI
  • DU SISI
  • CHEN DONGDONG
  • XIA PENGFEI
  • XIA MING
  • CHEN HONGLI
  • FU YAO

Assignees

  • 新疆东浩天成储能材料有限公司
  • 石河子大学

Dates

Publication Date
20260508
Application Date
20260210

Claims (10)

  1. 1. A corrosion inhibitor for manufacturing corrosion foil is characterized by comprising furan aniline acid, sodium dodecyl benzene sulfonate or sodium dodecyl sulfate.
  2. 2. The corrosion inhibitor for the production of a corrosion foil according to claim 1, wherein, The mass ratio of the furben-zene acid to the sodium dodecyl benzene sulfonate or the sodium dodecyl sulfate is 5-10:4.
  3. 3. The corrosion inhibitor for the production of a corrosion foil according to claim 1, wherein, The preparation method of the furbenidic acid comprises the steps of preparing the furbenidic acid through condensation reaction by taking 2, 4-dichloro-5-sulfonylaminobenzoic acid, furfuryl amine and sodium bicarbonate as reactants and dimethyl sulfoxide as a solvent.
  4. 4. A corrosion inhibitor for use in the manufacture of a corrosion foil as claimed in claim 3, The molar ratio of the 2, 4-dichloro-5-sulfonylaminobenzoic acid to the furfuryl amine to the sodium bicarbonate is 1:4:1.
  5. 5. A corrosion inhibitor for use in the manufacture of a corrosion foil as claimed in claim 3, The condensation reaction is carried out at 130-150 ℃ for 4-6h.
  6. 6. A method of etching aluminum foil, characterized in that the corrosion inhibitor for use in the manufacture of etched foil according to any one of claims 1 to 5 is used.
  7. 7. The method of etching aluminum foil according to claim 6, wherein the method of etching aluminum foil comprises: taking the pretreated aluminum optical foil subjected to direct-current electrochemical corrosion as an anode, taking a graphite electrode as a cathode, performing hole forming treatment, and performing reaming treatment after the hole forming treatment is finished to obtain a corrosion foil; In the pore forming treatment, the pore forming solution contains the corrosion inhibitor for producing a corrosion foil according to any one of claims 1 to 5.
  8. 8. The method of etching aluminum foil according to claim 7, wherein, The pretreatment is that the aluminum optical foil is placed in 4-10wt% NaOH solution, soaked for 60-100s at 60-90 ℃, then placed in 5-15wt% H 3 PO 4 solution, and soaked for 60-100s at 60-90 ℃.
  9. 9. The method of etching aluminum foil according to claim 7, wherein, The pore forming treatment is that aluminum foil is used as an anode, a graphite electrode is used as a cathode, the pretreated aluminum foil subjected to direct-current electrochemical corrosion is placed in pore forming solution of 5-10wt% of HCl and 20-40wt% of H 2 SO 4 for pore forming, the pore forming time is 60-180s, the temperature is 60-80 ℃, and the current density is 0.1-0.3A/cm 2 ; the porous solution further comprises 20-100mg of corrosion inhibitor for manufacturing corrosion foil according to any one of claims 1-5 per liter.
  10. 10. The method of etching aluminum foil according to claim 1, wherein, The reaming treatment is to carry out reaming in 5-15wt% H 3 PO 4 for 180-360s at 60-80 ℃.

Description

Corrosion inhibitor for manufacturing corrosion foil and aluminum foil corrosion method Technical Field The invention belongs to the technical field of electrode foil manufacturing, and particularly relates to a corrosion inhibitor for manufacturing corrosion foil and an aluminum foil corrosion method. Background The etched foil is a key core material for manufacturing the aluminum electrolytic capacitor, and forms high-density micro tunnel holes on the surface of the aluminum foil through electrochemical corrosion, so that the effective surface area is obviously increased, and the specific volume of the capacitor is improved. The etching step is usually performed in an acidic solution containing an aggressive medium such as chloride ions. In the etching process, in order to obtain an etched foil with high specific volume, high mechanical strength and excellent formation characteristics, the morphology, distribution and density of tunnel holes must be precisely controlled. However, the existing corrosion technology has the problems that in the dynamic corrosion reaction, local over-corrosion or uneven corrosion of the surface of the aluminum foil is easy to occur, so that tunnel holes are thick, and holes are formed or distributed unevenly, and part of the traditional corrosion inhibitor components have environmental risks and are harmful to human bodies, and long-term stability is insufficient due to decomposition failure under strong acid and electric field environments. At present, the corrosion inhibitor has problems in the actual use process, for example, the inorganic corrosion inhibitor cannot be well adsorbed on the surface of the aluminum foil, so that the specific capacitance increasing effect is limited. Most of organic corrosion inhibitors contain functional groups such as benzene rings and the like, which are harmful to human bodies and the environment. Because a single corrosion inhibitor cannot meet the complex environment. Therefore, there are corrosion inhibitors obtained by compounding a synergist, a surfactant and different types of corrosion inhibitors. In view of the above, the invention provides a novel compound corrosion inhibitor which is used for manufacturing corrosion foil, and can effectively inhibit over-corrosion and increase specific capacitance. Disclosure of Invention The invention aims to solve the defects of the prior art and provides a novel corrosion inhibitor used in the manufacture of corrosion foil, which can effectively inhibit over-corrosion and increase specific capacitance. In order to achieve the above purpose, the technical scheme adopted is as follows: a corrosion inhibitor for preparing corrosion foil is prepared from furben acid, sodium dodecylbenzene sulfonate or sodium dodecylsulfate. Further, the mass ratio of the furben-zene acid to the sodium dodecyl benzene sulfonate or the sodium dodecyl sulfate is 5-10:4. Further, the preparation method of the furbenidic acid comprises the steps of preparing the furbenidic acid through condensation reaction by taking 2, 4-dichloro-5-sulfonylaminobenzoic acid, furfuryl amine and sodium bicarbonate as reactants and dimethyl sulfoxide as a solvent. Still further, the molar ratio of the 2, 4-dichloro-5-sulfonylaminobenzoic acid, the furfuryl amine and the sodium bicarbonate is 1:4:1. Still further, the condensation reaction results in a temperature of 130-150 ℃ for a time of 4-6 hours. The invention also aims to provide an aluminum foil corrosion method, which adopts the corrosion inhibitor for manufacturing the corrosion foil and has good corrosion effect. In order to achieve the above purpose, the technical scheme adopted is as follows: an aluminum foil corrosion method adopts the corrosion inhibitor for manufacturing the corrosion foil. Further, the aluminum foil corrosion method comprises the following steps: taking the pretreated aluminum optical foil subjected to direct-current electrochemical corrosion as an anode, taking a graphite electrode as a cathode, performing hole forming treatment, and performing reaming treatment after the hole forming treatment is finished to obtain a corrosion foil; In the pore forming treatment, the pore forming solution contains the corrosion inhibitor for manufacturing the corrosion foil. Still further, the pretreatment is that the aluminum foil is placed in 4-10wt% NaOH solution, soaked for 60-100s at 60-90 ℃, then placed in 5-15wt% H 3PO4 solution, and soaked for 60-100s at 60-90 ℃. Still further, the pore forming treatment comprises taking aluminum foil as anode, graphite electrode as cathode, placing pretreated and DC electrochemical corroded aluminum foil in pore forming solution of 5-10wt% HCl and 20-40wt% H 2SO4 for pore forming for 60-180s at 60-80deg.C with current density of 0.1-0.3A/cm 2; each liter of the pore-forming solution also contains 20-100mg of the corrosion inhibitor for manufacturing the corrosion foil. Still further, the reaming treatment is to carry out reamin