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Method for preparing medium-high pressure corrosion foil by using corrosion process with phosphoric acid as corrosion inhibitor

A medium and high pressure corrosion foil and corrosion inhibitor technology, applied in the field of high pressure corrosion foil, can solve the problems of difficult to detect accurate content, large relative molecular weight, etc., and achieve the effect of improving bending performance, high economic value and improving product quality

Pending Publication Date: 2022-02-11
JIANGSU LIFU ELECTRODE FOIL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the special chemical properties of high molecular weight polymers, the relative molecular weight is large and it is difficult to detect the accurate content. The application in actual production will bring more inconvenience to control. Therefore, an improved technology is urgently needed to solve the problems in the existing technology. this problem exists

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for preparing medium and high pressure corroded foil by using phosphoric acid as a corrosion inhibitor, comprising the following steps:

[0031] Step 1: Pretreatment: Put the light foil raw material into a bath solution with a concentration of 20Wt% sulfuric acid, 3Wt% hydrochloric acid, and 1Wt% aluminum ion, and treat it at 60°C for 120Sec;

[0032] Step 2: Pore corrosion: put the aluminum foil after the above pretreatment into a bath solution with a concentration of 30wt% sulfuric acid, 3wt% hydrochloric acid, and 1wt% aluminum ion, and conduct DC electrolysis at 60°C for 50Sec;

[0033] Step 3: Cleaning: Rinse the aluminum foil treated by the porosity step with deionized water for 2 minutes;

[0034] Step 4: Hole expansion corrosion: Put the intermediate-treated aluminum foil into the bath composition ratio of 5wt% nitric acid, 0.2wt% aluminum ion and 0.5wt% phosphoric acid solution, and treat it with direct current at 65 ℃ for 14min;

[0035] Step 5: post...

Embodiment 2

[0039] A method for preparing medium and high pressure corroded foil by using phosphoric acid as a corrosion inhibitor, comprising the following steps:

[0040] Step 1: Pretreatment: Put the light foil raw material into a bath solution with a concentration of 30wt% sulfuric acid, 5wt% hydrochloric acid, and 2wt% aluminum ion, and treat it at 70°C for 60Sec;

[0041] Step 2: Pore corrosion: put the aluminum foil after the above pretreatment into a bath solution with a concentration of 50wt% sulfuric acid, 5wt% hydrochloric acid, and 2wt% aluminum ions, and conduct DC electrolysis at 80°C for 50Sec;

[0042] Step 3: Cleaning: Rinse the aluminum foil treated by the porosity step with deionized water for 4 minutes;

[0043] Step 4: Hole expansion corrosion: Put the intermediate-treated aluminum foil into the bath composition ratio of 10wt% nitric acid, 0.6wt% aluminum ion and 1.0wt% phosphoric acid solution, and treat it with direct current at 80 ℃ for 14min;

[0044] Step 5: pos...

Embodiment 3

[0048] A method for preparing medium and high pressure corroded foil by using phosphoric acid as a corrosion inhibitor, comprising the following steps:

[0049] Step 1: Pretreatment: Put the light foil raw material into a bath solution with a concentration of 25wt% sulfuric acid, 4wt% hydrochloric acid, and 1.5wt% aluminum ion, and treat it at 65°C for 90Sec;

[0050] Step 2: Pore corrosion: put the aluminum foil after the above pretreatment into a bath solution with a concentration of 40wt% sulfuric acid, 4wt% hydrochloric acid, and 1.5wt% aluminum ion, and conduct DC electrolysis at 70°C for 60Sec;

[0051] Step 3: Cleaning: Rinse the aluminum foil treated by the porosity step with deionized water for 3 minutes;

[0052] Step 4: Hole expansion corrosion: Put the intermediate-treated aluminum foil into a bath solution with a ratio of 8wt% nitric acid, 0.4wt% aluminum ion and 0.6wt% phosphoric acid solution, and treat it with direct current at 70°C for 10 minutes;

[0053] St...

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PUM

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Abstract

The invention discloses a method for preparing a medium-high pressure corrosion foil by using a corrosion process with phosphoric acid as a corrosion inhibitor. The method comprises the following steps of pre-treatment, hole-forming corrosion, cleaning, reaming corrosion, post-treatment and cleaning, and drying. Specially at the reaming corrosion stage, an aluminum foil subjected to intermediate treatment is put into a solution with the bath solution comprising 5-10 Wt% of nitric acid, 0.2-0.6 Wt% of aluminum ions and 0.5-1.0 Wt% of phosphoric acid, and the phosphoric acid is used as a corrosion inhibitor, so that the content of the corrosive liquid can be accurately measured, and great convenience is brought to production control. Meanwhile, after the phosphoric acid is used as the corrosion inhibitor, the mechanical property, especially the bending property, of the produced corrosion foil after formation is greatly improved, the product quality is improved, and the corrosion foil has very high economic value.

Description

technical field [0001] The invention relates to the technical field of high-pressure corroded foil, in particular to a method for preparing medium and high-pressure corroded foil through a corrosion process using phosphoric acid as a corrosion inhibitor. Background technique [0002] In the traditional corrosion process, some high molecular polymers are used as corrosion inhibitors in the hole expansion stage. Due to the special chemical properties of high molecular weight polymers, the relative molecular weight is large and it is difficult to detect the accurate content. The application in actual production will bring more inconvenience to control. Therefore, an improved technology is urgently needed to solve the problems in the prior art. This problem exists. Contents of the invention [0003] The purpose of the present invention is to provide a method for preparing medium and high pressure corroded foils using phosphoric acid as a corrosion inhibitor. Using phosphoric ...

Claims

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Application Information

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IPC IPC(8): C25F3/04
CPCC25F3/04
Inventor 袁欣欣袁烨艾仙云
Owner JIANGSU LIFU ELECTRODE FOIL
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