Unlock instant, AI-driven research and patent intelligence for your innovation.

Detection method of residue chloride ions on anode foil surface

A surface residue and detection method technology, applied in measuring devices, instruments, material analysis by electromagnetic means, etc., can solve the problems of complicated operation steps, long analysis time, chromatic aberration interference, etc., to achieve simple operation, good reproducibility, Accurate effect

Inactive Publication Date: 2019-03-22
DONGGUAN DONGYANG SOLAR SCI RES & DEV CO LTD
View PDF4 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. A lot of preparatory work must be done before the experiment;
[0004] 2. The analysis time is relatively long, and the analysis time of a sample is as long as about three hours; the operation steps are complicated and cumbersome;
[0005] 3. Finally, to determine whether the chloride ion content exceeds the standard is mainly to place the turbidimetric tube in a dark box and observe with the naked eye the color difference between the precipitation color in the sample and the precipitation color of the chloride ion standard solution with a concentration of 1ppm. Due to the interference of color difference, artificial Factors will cause large errors in judging the results

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Detection method of residue chloride ions on anode foil surface
  • Detection method of residue chloride ions on anode foil surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1 sample detection

[0034] A method for detecting residual chloride ions on the surface of an anode foil, the steps are:

[0035] 1) Prepare sodium chloride reference solution, prepare and calibrate silver nitrate standard solution;

[0036] 2) Cut the anode foil, cut it into foil, and weigh 10g ~ 15g of foil as a sample;

[0037] 3) The sample is put into 0.5mol / L nitric acid solution for dissolving to obtain a solution;

[0038] 4) Pour the solution into a 100mL volumetric flask, wash the dissolved foil with pure water, and pour the washing solution into the volumetric flask, then pour pure water into the volumetric flask to the scale line and draw 30mL-40mL Put it on a centrifuge for separation, and take 20mL of the above clarified liquid and pour it into a turbidimetric tube as the test liquid;

[0039] 5) Measure the potential jump range of the test solution on a potentiometric titrator under magnetic stirring to be 300mv to 600mv;

[0040] 6) With the...

Embodiment 2

[0064] Embodiment 2 detection result and analysis

[0065] 1. Sample inspection results

[0066] Table 1 Sample inspection results

[0067]

[0068] 2. Recovery rate test

[0069] Accurately weigh 10g sample, accurately add 10ug of chloride ion (sodium chloride), detect the result of added chloride ion, and calculate the recovery rate.

[0070] Table 2 recovery test data

[0071]

[0072] The recovery rate tends to be 100%, and the accuracy of the result is high. The average recovery rate of the present invention is 92%-99%, which can fully meet the measurement requirements for trace analysis.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a detection method of residue chloride ions on an anode foil surface. The method comprises the following steps of standard solution preparation and calibration, sampling and sample weighing, sample dissolution, sample extraction, electrode potential jump value measurement, and calculation of residue chloride ion content on the anode foil surface. According to the test principle, the chloride ions contained on the surface of the anode foil are transferred into a dilute nitric acid water solution; a potentiometric titration method is used; a silver electrode is used as an indicating electrode; the consumed volume of the silver nitrate solution at the titration terminal point is determined; the chloride ion content on the anode foil surface is calculated. By using thedetection method provided by the invention, the residue chloride ion content on the anode foil surface can be effectively detected. Compared with a conventional turbidimetry method, the method has the advantages that the test result accuracy is higher; the reproducibility is higher; the operation is simple; the test time is short; the artificial errors are small; high efficiency and high guarantee are provided for batch production of qualified capacitor products.

Description

technical field [0001] The invention relates to the technical field of electrolytic capacitors, in particular to a method for detecting residual chlorine ions on the surface of an anode foil for electrolytic capacitors. Background technique [0002] During the production process of electrolytic capacitors, residual chloride ions in the anode foil can cause intergranular cracks and brittle fractures, resulting in foil corrosion and shortened life. At present, domestic and foreign manufacturers strictly control this index at 1mg / m 2 Below, some at 0.5mg / m 2 the following. Therefore, the determination of the residual chlorine content on the surface of the anode foil is very important. At this stage, the turbidimetric method is mainly used to measure the residual chloride ion content on the surface of the anode foil. This analysis method currently has the following defects: [0003] 1. A lot of preparatory work must be done before the experiment; [0004] 2. The analysis tim...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01N27/42
CPCG01N27/426
Inventor 黄会蓉王颜程正
Owner DONGGUAN DONGYANG SOLAR SCI RES & DEV CO LTD