CN117269161B - Method for rapidly judging whether chloride ion content of aluminum shell is qualified or not according to surface area - Google Patents
Method for rapidly judging whether chloride ion content of aluminum shell is qualified or not according to surface area Download PDFInfo
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- CN117269161B CN117269161B CN202311559073.XA CN202311559073A CN117269161B CN 117269161 B CN117269161 B CN 117269161B CN 202311559073 A CN202311559073 A CN 202311559073A CN 117269161 B CN117269161 B CN 117269161B
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 127
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 127
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 title claims abstract description 105
- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000011010 flushing procedure Methods 0.000 claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000000243 solution Substances 0.000 claims abstract description 29
- 239000012086 standard solution Substances 0.000 claims abstract description 27
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000007788 liquid Substances 0.000 claims abstract description 22
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 14
- 229910001961 silver nitrate Inorganic materials 0.000 claims abstract description 13
- 239000003086 colorant Substances 0.000 claims abstract description 10
- 230000020477 pH reduction Effects 0.000 claims abstract description 6
- 239000003990 capacitor Substances 0.000 claims description 7
- 238000004737 colorimetric analysis Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 description 26
- 238000004140 cleaning Methods 0.000 description 10
- 238000005070 sampling Methods 0.000 description 5
- 230000000295 complement effect Effects 0.000 description 3
- 239000008367 deionised water Substances 0.000 description 3
- 229910021641 deionized water Inorganic materials 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- 238000009835 boiling Methods 0.000 description 2
- -1 chlorine ions Chemical class 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000012488 sample solution Substances 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/34—Purifying; Cleaning
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/30—Computing systems specially adapted for manufacturing
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Abstract
The invention discloses a method for rapidly judging whether the chloride ion content of an aluminum shell is qualified or not according to the surface area, which comprises the following steps: s1, providing a batch of aluminum shells with diameter D and height H; s2, repeatedly flushing the inner wall surface of the batch of aluminum shells by using V liter of water to obtain flushing liquid; s3, providing V 1 A chloride ion standard solution with a concentration of 1.0 ppm; v=v 1 The method comprises the steps of carrying out a first treatment on the surface of the S4, respectively adding the same nitric acid into the systems of the S2 and the S3 for acidification, and then adding the same silver nitrate for color development; s5, comparing the colors of the S2 and the S3 solutions, and judging whether the chloride ion content of the batch of aluminum shells is qualified or not; if the colors of the S2 and the S3 solutions are consistent, judging that the solutions are unqualified; if the color of the S2 solution is darker than that of the S3, exceeding a critical value, and judging that the solution is unqualified; otherwise, judging the product to be qualified; the premise of judging that the content of the chloride ions in the aluminum shells with the number of N is qualified is that: cxS x N < 1.0 xV 1 The method comprises the steps of carrying out a first treatment on the surface of the Wherein: c is the chloride ion concentration of the inner wall surface of the aluminum shell; s is the inner wall area of the aluminum shell.
Description
Technical Field
The invention relates to the technical field of capacitors, in particular to a method for rapidly judging whether the chloride ion content of an aluminum shell is qualified or not according to the surface area.
Background
In the capacitor, the chlorine ions can easily form strong acid with hydrogen ions in the electrolyte, which can have strong corrosion effect on oxide films in the aluminum shell of the capacitor and can seriously influence the service life of the capacitor. Therefore, prior to actual production, the chloride ion content in each raw material needs to be controlled, and the chloride ion content needs to be less than 1.0ppm.1.0ppm represents one part per million, i.e., 1.0mg/kg, and is theoretically contained in an aqueous solution at 1.0mg/L.
At present, the method for detecting chloride ions contained in the aluminum shell commonly used in the industry comprises the following steps: weighing 10.0g of aluminum shell, placing the aluminum shell in a beaker, and then adding 100ml of deionized water; the beaker is placed on an electric furnace to be heated, the solution is boiled and cooled, pure water is added to make up to 100ml, after shaking up, the solution in the beaker is poured into a colorimetric tube to 25ml of scale marks, then 1.0ml of diluted nitric acid is added to acidify (concentrated nitric acid: water=1:1), and then 1.0ml of silver nitrate is added to develop color. Then 2.5ml of chloride ion standard solution with the concentration of 1.0ppm is taken, water is added to complement 25.0ml, then 1.0ml of diluted nitric acid and 1.0ml of silver nitrate are also added, and then color comparison is carried out with the sample solution, so as to judge whether the chloride ion of the sample exceeds the standard or not through a colorimetric method.
However, the existing detection method has the following problems: (1) The quality of the aluminum shell is difficult to control to 10.0g, the quality of the aluminum shells with different specifications is different, the single quality of some large aluminum shells exceeds 10.0g, and the single quality of some large aluminum shells is less than 10.0g, so that the application range of the aluminum shell is smaller; (2) The chloride ions are easy to dissolve in water, and the process of boiling and then cooling the solution is not needed to accelerate the dissolution, so that a great deal of time is wasted and the detection working efficiency is affected; (3) In addition, after the chloride ion standard solution is diluted by adding water (the concentration is 0.1 ppm), the color is very light after nitric acid and silver nitrate are added, and whether precipitation exists or not is difficult to judge by naked eyes, so that a certain error is brought to a detection result, and a judgment result is influenced.
Disclosure of Invention
The invention aims to overcome the defects of the existing detection method (such as narrow application range, low detection efficiency, large detection result error and the like), and provides the method for rapidly judging whether the chloride ion content of the aluminum shell is qualified according to the surface area.
The invention is realized by the following technical scheme:
a method for rapidly judging whether the chloride ion content of an aluminum shell is qualified or not according to the surface area is characterized by comprising the following steps:
s1, providing a batch of capacitor aluminum shells with the number of N, the diameter of D meters and the height of H meters;
s2, repeatedly flushing the inner wall surface of the batch of aluminum shells by using V liter of water to obtain flushing liquid; wherein: the total mass of chloride ions contained in the V liter flushing liquid is as follows: c×s×n; during the flushing process: repeatedly flushing each aluminum shell for 3-5 times;
s3, providing V 1 A chloride ion standard solution with a concentration of 1.0 ppm; wherein: v=v 1 And V is 1 The total mass of chloride ions contained in the standard solution of chloride ions is 1.0ppm by V 1 ；
S4, respectively adding nitric acid with the same volume into the flushing liquid in the step S2 and the chloride ion standard solution in the step S3 for acidification, and then adding silver nitrate with the same volume for color development;
s5, comparing the colors of the solutions in the step S2 and the step S3 according to a colorimetric method to judge whether the chloride ion content of the batch of N aluminum shells is qualified or not;
the total amount of chloride ions and V in the V liter flushing liquid 1 The total amount of chloride ions contained in the standard solution of chloride ions is the same as the critical value;
if the colors of the solutions in the step S2 and the step S3 are consistent, the critical value is just reached, and the failure is judged; if the color of the solution in the step S2 is darker than that in the step S3, exceeding a critical value, and judging that the solution is unqualified; otherwise, judging to be qualified;
then the precondition for judging that the chlorine ion content of the aluminum shell with the number of N is qualified is that: cxS x N < 1.0 xV 1 ；
Wherein: c represents the concentration of chloride ions on the inner wall surface of the aluminum shell in mg/m; s represents the inner wall area of the aluminum shell, and s=pi (D/2) is +pi DH, unit m.
Specifically, pi (D/2) is the bottom area of the aluminum shell, and pi DH is the side area of the aluminum shell; the thickness of the aluminum shell is ignored in the calculation, and then the area of the inner wall of the aluminum shell corresponds to the surface area of the aluminum shell.
The method provided by the invention can judge whether a batch of aluminum shells meet the chloride ion content requirement in batches, if so, the batch of aluminum shells meet the chloride ion detection requirement, and if not, the batch of aluminum shells do not meet the chloride ion detection requirement. It should be noted that: the method is only used for rapidly judging whether the aluminum shell of one batch meets the chloride ion content requirement before actual production, and is a qualitative detection method, not a quantitative detection method. Even a batch of aluminum shells with the chloride ion content meeting the requirement is judged, the aluminum shells do not meet the requirement when all the aluminum shells in the batch are singly detected; otherwise, if the chlorine ion content detection is determined to be not satisfactory, a batch of aluminum shells is not represented, and all aluminum shells in the batch are not satisfactory when being detected singly. The method is mainly used for rapidly and qualitatively detecting the chloride ion content in the aluminum shell in a large scale, and meets the statistical requirement.
Further, a method for rapidly judging whether the chloride ion content of the aluminum shell is qualified or not according to the surface area is as follows: the volume ratio of the flushing liquid or the chloridion standard solution to the nitric acid is (20-50): (1-3).
Further, a method for rapidly judging whether the chloride ion content of the aluminum shell is qualified or not according to the surface area is as follows: the volume ratio of the flushing liquid or the chloride ion standard solution to the silver nitrate is (20-50): (1-3).
Further, a method for rapidly judging whether the chloride ion content of the aluminum shell is qualified or not according to the surface area is as follows: the ratio of the inner wall area S of the aluminum shell to the water consumption for flushing the aluminum shell is (40-50) cm 2 ：（20～40）ml。
Further, a method for rapidly judging whether the chloride ion content of the aluminum shell is qualified or not according to the surface area is as follows: the number N of the aluminum shells is more than or equal to 8.
The method of the invention determines the quantity N of the aluminum shells and the water dosage V (L) according to the surface area of the aluminum shells, and then the flushing liquid is subjected to color comparison with a chloride ion standard solution with the concentration of 1.0ppm. Aluminium shellDiameter D (m), height H (m), bottom area 0.25pi D (m), the side area is pi DH (m), and the surface area S (m) is the sum of the two areas. Assuming that the chloride ion concentration on the surface of the aluminum shell is C (mg/m), the critical result of the detection is: c (mg/m, m) S (m (N)) n=1.0 ppm v 1 (L). The relation between the number of the aluminum shells and the volume of the water can be obtained, and a table can be made according to the formula, so that the number of the aluminum shells and the water consumption of all common specifications are in a reasonable range. Taking applicant's Nannong river sea capacitor stock Co.Ltd as an example: the content of chloride ions is required to be less than 0.5 mg/m. Therefore, the chloride ion concentration of 0.5mg/m on the surface of the aluminum shell can be used as a critical value, and then the water quantity V required for cleaning the single aluminum shell can be determined according to the area size S of the aluminum shell and the formula of 0.5 (mg/m < m >) S (m < N > =1.0 ppm) V; the water consumption for cleaning the aluminum shell is adjusted appropriately according to aluminum shells with different specifications (different surface areas). The less water is used (the cuvette typically has 25ml of liquid to be measured), the darker the effect of the added dilute nitric acid and silver nitrate on the color. Meanwhile, after the cleaning water quantity of the single aluminum shell is determined, the sampling quantity N of the aluminum shell during detection can be obtained by back-pushing in order to ensure the accuracy of the detection result.
The invention has the beneficial effects that:
(1) The existing detection method uses mass fraction concentration for detection, a large amount of water is needed to submerge the aluminum shell, and for aluminum shells with larger sizes, 100ml of water in the existing method is insufficient for submerging the aluminum shell, so that the detection result is inaccurate, and the existing method is suitable for detecting small-size aluminum shells; the method only needs to clean the surface of the aluminum shell by using water, does not need to submerge the aluminum shell, can flexibly adjust the consumption of the cleaning water according to the surface area of the aluminum shell, is more convenient to detect, and has wide application range.
(2) In the existing detection method, the concentration of chloride ions is diluted, so that the detection result is not accurate enough easily; according to the method, the standard concentration of chloride ions can be accurately measured by strictly calculating according to a formula and using different amounts of aluminum shells with different specifications.
(3) In the existing detection method, the quality of 10.0g can meet different problems for aluminum shells of different specifications, the small aluminum shells can be too much used and even exceed the sampling quantity specified by national standards, and the quality of the large aluminum shells easily exceeds 10.0g, so that the detection process is inconvenient, and the method is not suitable for being popularized and used in a large range. The method provided by the invention can flexibly adjust the quantity of the aluminum shells and the using amount of deionized water, and can reasonably arrange the aluminum shells with different specifications.
(4) The method is convenient and quick, does not need to be heated and boiled, and can greatly improve the detection efficiency and the working efficiency.
Detailed Description
The technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
A method for rapidly judging whether the chloride ion content of an aluminum shell is qualified or not according to the surface area is characterized by comprising the following steps:
s1, providing a batch of aluminum shells with the number of N, the diameter of D (2.2 cm) and the height of H (5.36 cm); the inner wall area s=pi (D/2) +pi DH is about (40.83×10) -4 ) m, i.e. 40.83cm 2 ；
S2, repeatedly flushing the inner wall surface of the aluminum shell with the quantity of N by utilizing water with the volume of V (0.02L) (repeatedly flushing each aluminum shell for 3 times) to obtain flushing fluid; wherein: the total mass of chloride ions contained in the V liter flushing liquid is as follows: c×s×n; wherein: c represents the concentration of chloride ions on the inner wall surface of the aluminum shell in mg/m; s represents the inner wall area of the aluminum shell, and s=pi (D/2) is represented by +pi DH, unit m; chloride ion content of aluminum foil used for manufacturing aluminum caseThe requirement is < 0.5 mg/m; assuming that the area concentration of chloride ions in the aluminum shell is 0.5 mg/m; then the total mass of the chloride ions contained in 0.02 liter of the rinse solution was 0.5mg/m X (40.83X 10) -4 ）m²×N；
S3, providing V 1 (0.02L) chloride ion standard solution with concentration of 1.0 ppm; wherein: v=v 1 And V is 1 The total mass of chloride ions contained in the standard solution of chloride ions is 1.0 XV 1 The method comprises the steps of carrying out a first treatment on the surface of the Namely, the total mass of chloride ions contained in 0.02L of the standard solution of chloride ions is 1.0 mg/. Times.0.02L;
s4, respectively adding 2.0 milliliters of dilute nitric acid into the flushing liquid in the step S2 and the chloride ion standard solution in the step S3 for acidification, and then adding 1.0 milliliter of silver nitrate for color development;
s5, comparing the colors of the solutions in the step S2 and the step S3 according to a colorimetric method to judge whether the chloride ion content of the batch of N aluminum shells is qualified or not;
the total amount of chloride ions and V in the V liter flushing liquid 1 The total amount of chloride ions contained in the standard solution of chloride ions is the same as the critical value;
if the colors of the solutions in the step S2 and the step S3 are consistent, the critical value is just reached, and the batch of aluminum shells are judged to be unqualified; if the color of the solution in the step S2 is darker than that in the step S3, exceeding a critical value, and judging that the aluminum shells of the batch are unqualified; otherwise, judging to be qualified;
the precondition for judging that the chloride ion content of the aluminum shell with the number of N is qualified is that: cxS x N < 1.0 xV 1 ；
If the chloride ion detection of the batch of aluminum shells is just satisfactory, the batch is carried out according to 0.5mg/m X (40.83X 10) -4 ) According to the method, the sampling quantity required for detecting the chloride ion content of a batch of aluminum shells is about 10, namely N is equal to 10;
therefore, when the method is adopted to judge whether the chloride ion content of the aluminum shell is qualified, more than 10 aluminum shell samples are selected.
Example 2
A method for rapidly judging whether the chloride ion content of an aluminum shell is qualified or not according to the surface area is characterized by comprising the following steps:
s1, providing a batch of aluminum shells with the number of 8, the diameter of D (3.0 cm) and the height of H (4.45 cm); the inner wall area s=pi (D/2) is about (48.98 ×10) to +pi DH -4 ) m, i.e. 48.98cm 2 ；
S2, repeatedly flushing the inner wall surface of the aluminum shell with the volume of V (0.05L) and the quantity of 8 (repeatedly flushing each aluminum shell for 5 times) by using water with the volume of V (0.05L) to obtain flushing fluid; wherein: the total mass of chloride ions contained in the V liter flushing liquid is as follows: c×s×n; wherein: c represents the concentration of chloride ions on the inner wall surface of the aluminum shell in mg/m; s represents the inner wall area of the aluminum shell, and s=pi (D/2) is represented by +pi DH, unit m; then, the total mass of the chloride ions contained in 0.05 liter of the rinse solution was C mg/m (48.98X 10) -4 ）m²×8；
S3, providing V 1 (0.05L) chloride ion standard solution with concentration of 1.0 ppm; wherein: v=v 1 And V is 1 The total mass of chloride ions contained in the standard solution of chloride ions is 1.0 XV 1 The method comprises the steps of carrying out a first treatment on the surface of the Namely, the total mass of chloride ions contained in 0.05L of chloride ion standard solution is 1.0 mg/. Times.0.05L;
s4, respectively adding 2.0 milliliters of nitric acid into the flushing liquid in the step S2 and the chloride ion standard solution in the step S3 for acidification, and then adding 1.0 milliliters of silver nitrate for color development;
s5, comparing the colors of the solutions in the step S2 and the step S3 according to a colorimetric method to judge whether the chloride ion content of the batch of N aluminum shells is qualified or not;
the total amount of chloride ions and V in the V liter flushing liquid 1 The total amount of chloride ions contained in the standard solution of chloride ions is the same as the critical value;
the precondition for judging that the chloride ion content of the aluminum shell with the number of N is qualified is that: cxS x N < 1.0 xV 1 ；
If the colors of the solutions in the step S2 and the step S3 are consistent, the critical value is just reached, and the batch of aluminum shells are judged to be unqualified; if the color of the solution in the step S2 is darker than that in the step S3, exceeding a critical value, and judging that the aluminum shells of the batch are unqualified; otherwise, the judgment is qualified.
The method can be used for cleaning by selecting a proper amount of water according to the surface size of the aluminum shell, and rapidly detecting and judging whether the content of chloride ions in the batch of aluminum shells is qualified or not. The chloride ions are easy to dissolve in water, can enter the solution without heating, and can be directly cleaned to accelerate the inspection and improve the working efficiency.
Comparative example 1
(1) Weighing 10.0g of aluminum shell, placing the aluminum shell in a beaker, and adding 100ml of deionized water into the beaker;
(2) Heating the beaker on an electric furnace, boiling the solution, cooling, adding pure water to complement to 100ml, shaking uniformly, pouring the solution in the beaker into a colorimetric tube to 25ml of scale marks, adding 2.0ml of nitric acid for acidification, and adding 1.0ml of silver nitrate for color development;
(3) Then 2.5ml of chloride ion standard solution with the concentration of 1.0ppm is taken, water is added to complement 25ml, then 2.0ml of nitric acid and 1.0ml of silver nitrate are added, then color comparison is carried out with the sample solution, and whether the chloride ion of the sample exceeds the standard is judged by a colorimetry method.
The detection mode of comparative example 1 is a sampling inspection method, wherein a plurality of aluminum shells are randomly extracted from a batch of aluminum shells to be detected according to the scheme, and if the sampling inspection is qualified, the batch of aluminum shells are judged to meet the requirement; the method of the invention is batch detection, and can detect whether the chloride ion content in a batch of aluminum shells meets the requirement or not, and the method of the invention has higher detection speed.
If the color comparison is difficult, the method can improve the concentration of chloride ions under the same cleaning sample quantity by reducing the cleaning water consumption so as to reduce the difficulty of color comparison; or more samples can be cleaned by increasing the number of cleaning samples under the same cleaning water consumption, so that chloride ions in the cleaning liquid are more, and the difficulty of color development contrast is reduced.
The above-described preferred embodiments of the present invention are only for illustrating the present invention, and are not to be construed as limiting the present invention. Obvious changes and modifications of the invention, which are introduced by the technical solution of the present invention, are still within the scope of the present invention.
Claims (4)
1. A method for rapidly judging whether the chloride ion content of an aluminum shell is qualified or not according to the surface area is characterized by comprising the following steps:
s1, providing a batch of capacitor aluminum shells with the number of N, the diameter of D and the height of H;
s2, repeatedly flushing the inner wall surface of the batch of aluminum shells by using V liter of water to obtain flushing liquid; wherein: the total mass of chloride ions contained in the V liter flushing liquid is as follows: c×s×n;
s3, providing V 1 A chloride ion standard solution with a concentration of 1.0 ppm; wherein: v=v 1 V is then 1 The total mass of chloride ions contained in the standard solution of chloride ions is 1.0ppm by V 1 ；
S4, respectively adding nitric acid with the same volume into the flushing liquid in the step S2 and the chloride ion standard solution in the step S3 for acidification, and then adding silver nitrate with the same volume for color development;
s5, comparing the colors of the solutions in the step S2 and the step S3 according to a colorimetric method to judge whether the chloride ion content of the batch of N aluminum shells is qualified or not;
the total amount of chloride ions and V in the V liter flushing liquid 1 The total amount of chloride ions contained in the standard solution of chloride ions is the same as the critical value;
if the colors of the solutions in the step S2 and the step S3 are consistent, the critical value is just reached, and the failure is judged; if the color of the solution in the step S2 is darker than that in the step S3, exceeding a critical value, and judging that the solution is unqualified; otherwise, judging to be qualified;
the precondition for judging that the chloride ion content of the aluminum shell with the number of N is qualified is that: cxS x N < 1.0 xV 1 ；
Wherein: c represents the concentration of chloride ions on the inner wall surface of the aluminum shell in mg/m; s represents the inner wall area of the aluminum shell, and s=pi (D/2) is represented by +pi DH, unit m;
the ratio of the inner wall area S of the aluminum shell to the water consumption for flushing the aluminum shell is (40-50) cm 2 ：（20～40）ml。
2. The method for rapidly judging whether the chloride ion content of the aluminum shell is qualified or not according to the surface area of the aluminum shell according to claim 1, wherein the volume ratio of the flushing liquid or the chloride ion standard solution to the nitric acid is (20-50): (1-3).
3. The method for rapidly judging whether the chloride ion content of the aluminum shell is qualified or not according to the surface area of the aluminum shell according to claim 1, wherein the volume ratio of the flushing liquid or the chloride ion standard solution to the silver nitrate is (20-50): (1-3).
4. The method for rapidly judging whether the chloride ion content of the aluminum shell is qualified or not according to the surface area of the aluminum shell according to claim 1, wherein the number N of the aluminum shells is more than or equal to 8.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311559073.XA CN117269161B (en) | 2023-11-22 | 2023-11-22 | Method for rapidly judging whether chloride ion content of aluminum shell is qualified or not according to surface area |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311559073.XA CN117269161B (en) | 2023-11-22 | 2023-11-22 | Method for rapidly judging whether chloride ion content of aluminum shell is qualified or not according to surface area |
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| CN117269161A CN117269161A (en) | 2023-12-22 |
| CN117269161B true CN117269161B (en) | 2024-02-13 |
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| CN102967600A (en) * | 2012-11-26 | 2013-03-13 | 宜宾海丝特纤维有限责任公司 | Method for detecting content of ion in sodium hydroxide solution in viscose |
| CN109507266A (en) * | 2017-09-14 | 2019-03-22 | 东莞东阳光科研发有限公司 | A kind of detection method of anode foils remained on surface chloride ion |
| CN115266464A (en) * | 2022-08-31 | 2022-11-01 | 陕西法士特齿轮有限责任公司 | Transmission deposit composition detection method |
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| CN102967600A (en) * | 2012-11-26 | 2013-03-13 | 宜宾海丝特纤维有限责任公司 | Method for detecting content of ion in sodium hydroxide solution in viscose |
| CN109507266A (en) * | 2017-09-14 | 2019-03-22 | 东莞东阳光科研发有限公司 | A kind of detection method of anode foils remained on surface chloride ion |
| CN115266464A (en) * | 2022-08-31 | 2022-11-01 | 陕西法士特齿轮有限责任公司 | Transmission deposit composition detection method |
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