CN104962957A - Method for detecting potential variation of anode strip for electrolytic copper foil - Google Patents
Method for detecting potential variation of anode strip for electrolytic copper foil Download PDFInfo
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- CN104962957A CN104962957A CN201510398495.2A CN201510398495A CN104962957A CN 104962957 A CN104962957 A CN 104962957A CN 201510398495 A CN201510398495 A CN 201510398495A CN 104962957 A CN104962957 A CN 104962957A
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- anode strap
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- copper foil
- oxygen evolution
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Abstract
The invention relates to a method for detecting potential variation of an anode strip for electrolytic copper foil. The method comprises the steps: (A) detecting oxygen evolution potential of multiple parts (for example 4 to 20 parts, preferably 6 to 14 parts) of a used anode strip, particularly parts at two longitudinal sides of the anode strip and a screw hole part of the anode strip; (B) when the difference between a maximum value and a minimum value in the detection values of multiple parts of the anode strip is less than or equal to 0.2V, determining that the anode strip can be continuously used, and when the difference between the maximum value and the minimum value is more than 0.2V, determining that the anode strip needs to be replaced.
Description
Technical field
The present invention relates to a kind of according to electrolytic copper foil anode strap potential variation determine this anode strap the need of change method.
Background technology
The production of electrolytic copper foil is that lead to heavy DC electricity on the cathode roller and anode strap of raw paper tinsel machine after, under the effect of electric field, cupric ion is separated out on cathode roller, thus obtains Copper Foil.The material of current anode strap is generally lead or titanium material carries out coating process, and in electrolytic process, Ni―Ti anode top coat can engender change (analysing oxygen, scuffing, lead sulfate attachment etc.) in various degree, will cause the change of current potential.The thin and thick uniformity coefficient that anode strap surface potential is uneven will cause electrolytic copper foil is deteriorated, and then affects quality product and even occur waste product.Routine occurs that a whole set of (14 pieces) anode strap changed by the even just needs of Copper Foil uneven distribution, and cost needs tens0000 yuan.
The material that the anode of Copper Foil manufacture uses at first is lead, and the advantage that the anode of this material is main is cheap, shortcoming mainly resistance greatly and be easily oxidized, life cycle is short.The anode for electrolytic copper foil of current main flow is Ni―Ti anode bar, technical process is: cutting → punching → etching (oxalic acid) → coating → baking (repeatedly carrying out) of titanium material, this anode relative performance stablize, resistance low and be not easy occur oxidation.
The raw paper tinsel machine of every platform needs installation 14 pieces of anode straps, and when anode strap uses for some time, the thin and thick uniformity coefficient of Copper Foil can be greatly affected and even occur pin hole.Conventional processing mode is exactly 14 pieces of anode straps are all changed scrap.The cost of this mode is high, and delays production.Therefore be badly in need of a kind of simple and feasible method, just can detect at the scene of Copper Foil manufacture, judge that each block anode strap is the need of replacing, can effectively save production cost accurately.
Summary of the invention
The present invention is directed to a kind of simple and feasible detection method of above problem design, antianode bar surface electrical potential difference detects, can accurately judge specifically potential variation has appearred in which block anode strap, provide the instruction of science for changing anode strap, and then greatly save the production cost of Copper Foil manufacture.
Therefore, the object of this invention is to provide a kind of electrolytic copper foil produce according to electrolytic copper foil anode strap potential variation determine this anode strap the need of change method, it comprises:
(A) to multiple positions (such as 4-20 position, a preferred 6-14 position) of the anode strap used, the especially longitudinal position of both sides of anode strap and the screw eye location detection oxygen evolution potential of anode strap;
(B) in the detected value at multiple positions of an anode strap, when the difference of maxima and minima is less than or equal to 0.2V, determine that this anode strap can continue to use, when the difference of maxima and minima is greater than 0.2V, then determine that this anode strap needs to change.
Preferably, the position of the detection oxygen evolution potential of anode strap comprises each three points (comprising both sides and the centre of this end) of end and the position of the 3rd, the 4th, the 5th, the 9th, the 12, the 16, the 17, the 18 screw eye of the longitudinal both sides of anode strap, and wherein the numbering of screw eye is serial number from left to right, from top to bottom in the vertical.
Preferably, the position of the detection oxygen evolution potential of anode strap comprises each point of end and the position of the 3rd, the 4th, the 5th, the 9th, the 12, the 18 screw eye of the longitudinal both sides of anode strap, amount to six positions, wherein the numbering of screw eye is serial number from left to right, from top to bottom in the vertical.
Applicant, through repetition test, finds that the check point at above-mentioned position is representative, can ensure the reliability detected.
Oxygen evolution potential is tested, and for characterizing the electric conductivity of difference on anode, thus show whether even the electric current of anode surface exports.Main to contrast original standard specimen to judge whether current existing oxygen overpotential on anode raises.
Such as the application comprises volometer (volt ohm-milliammeter) to a kind of device that this designs, reference electrode, (epimere is thick for Glass tubing, hypomere is thin), the foraminate negative electrode of bottom belt, anode strap, wherein, Glass tubing is built with electrolytic solution, reference electrode one end is immersed in the electrolytic solution in Glass tubing, the other end of reference electrode connects potentiometer, then potentiometer is connected to anode, one end of negative electrode is connected to direct supply, then current meter is connected to, be connected to one end of anode again, the other end of negative electrode is connected with anode strap, the lower end of Glass tubing connects the aperture of cathode bottom, Cleaning Principle is as follows: reference electrode mainly plays the effect of basic reference, when stable electric current is added between cathode anode time, because have megohmite between cathode anode, electric current can only by the electrolytic solution of Glass tubing again through reference electrode UNICOM.The process of an electrolysis that in fact Here it is, oxygen can shine into the rising of current potential in the process separated out, and the voltage being added in the voltmeter detection between reference electrode and anode will rise.When worsening appears in positive plate, the oxygen evolution potential of partial points will rise, and will cause occurring uneven characteristic when electrolysis.
The selection of the electrolytic solution of testing process extremely concentration determines current potential extent, and the potential difference error that excessive concentration detects is large and be difficult to mate with reference electrode; The too low data that can cause again detecting of concentration are too close, can not describe the problem.Through test of many times, contriver finally determines that the electrolytic solution that applicable Cu foil anode bar detects is dilute sulphuric acid, concentration is 0.5 ~ 1.5mol/L, preferred 1mol/L, through on-the-spot test Copper Foil production anode strap, oxygen evolution potential is normal condition between 0.80-1.0V, and this anode strap produced according to each manufacturers is also had any different certainly, such as, can have ± the difference of 0.1V.Judge that whether normal main such as 6 points or 14 points according to detecting of anode strap potential difference compare, if within maximum value and minimum value differ 0.2V, think that this anode strap can be used.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of oxygen evolution potential test set.
Fig. 2 is the oxygen evolution potential test position of anode strap.
Embodiment
In following test portion, as shown in Figure 1, make oxygen evolution potential test set, prepare little direct supply 30 (about 5A), reference electrode 1 (generally selecting mercurous sulfate or calomel), negative electrode little titanium bucket (duck eye is arranged at bottom) 20, Glass tubing 2 (comprising thicker epimere and kapillary hypomere), one, volt ohm-milliammeter, wire are some, little for negative electrode titanium bucket is placed on test anodes bar 10, with wire, little for negative electrode titanium bucket is connected with direct supply, then be connected to volt ohm-milliammeter, then connect one end of test anodes bar.Reference electrode is immersed in Glass tubing electrolytic solution, and is connected with volt ohm-milliammeter, is then connected to test anodes bar, and the tip capillary of Glass tubing and little titanium bucket keep the position of about 2mm, can not allow the too fast outflow of electrolytic solution like this.Electrolytic solution is filled it up with in Glass tubing during detection, the wiring of power supply is carried out according to the schematic diagram of Fig. 1, and titanium bottom of the barrel insulation paste and anode strap insulate, and the aperture of little titanium bucket is aimed at the position needing to detect, direct supply electric current is transferred to 0.5A, observes the number of degrees of voltmeter.Electrolytic solution uses 1mol/L dilute sulphuric acid.
As shown in Figure 2, black square represents detection position, in anode strap, the numbering of screw eye is that serial number from left to right, is from top to bottom P1-P20 in the vertical, detect position and comprise D1-D14, wherein D1-D3 and D12-D14 lays respectively at each three points (comprising both sides and the centre of this end) of the end of the longitudinal both sides of anode strap, and D4-D11 refers to the position of the 3rd, the 4th, the 5th, the 9th, the 12, the 16, the 17, the 18 screw eye respectively.
Embodiment 1
The thin and thick of Copper Foil in use procedure is occurred that oxygen evolution potential test is carried out at multiple positions (as shown in table 1) of uneven anode strap.The anode 7 of 0.2V is greater than to minimum value and maximum value and anode 8 is changed.Continue operation after replacing, the electrolytic copper foil thickness of producing is even, conforms to quality requirements.
Table 1
Embodiment 2
The thin and thick of Copper Foil in use procedure is occurred that oxygen evolution potential test is carried out at multiple positions (as shown in table 2) of uneven anode strap.The anode 2 of 0.2V is greater than to minimum value and maximum value and anode 9 is changed.Continue operation after replacing, the electrolytic copper foil thickness of producing is even, conforms to quality requirements.
Table 2
As can be seen from the above results, according to the observed value of anode strap oxygen evolution potential, can determine which anode strap needs to change, thus avoid whole anode strap is changed, provide significant conservation cost.
Claims (5)
1. in electrolytic copper foil is produced, determine that this anode strap is the need of the method changed according to electrolytic copper foil anode strap potential variation, it comprises:
(A) to multiple positions (such as 4-20 position, a preferred 6-14 position) of the anode strap used, the especially longitudinal position of both sides of anode strap and the screw eye location detection oxygen evolution potential of anode strap;
(B) in the detected value at multiple positions of an anode strap, when the difference of maxima and minima is less than or equal to 0.2V, determine that this anode strap can continue to use, when the difference of maxima and minima is greater than 0.2V, then determine that this anode strap needs to change.
2. method according to claim 1, wherein, the position of the detection oxygen evolution potential of anode strap comprises each three points of end and the position of the 3rd, the 4th, the 5th, the 9th, the 12, the 16, the 17, the 18 screw eye of the longitudinal both sides of anode strap, and wherein the numbering of screw eye is serial number from left to right, from top to bottom in the vertical.
3. method according to claim 1, wherein, the position of the detection oxygen evolution potential of anode strap comprises each point of end and the position of the 3rd, the 4th, the 5th, the 9th, the 12, the 18 screw eye of the longitudinal both sides of anode strap, amount to six positions, wherein the numbering of screw eye is serial number from left to right, from top to bottom in the vertical.
4. the method according to any one of claim 1-3, wherein, the electrolytic solution detecting oxygen evolution potential uses 0.5 ~ 1.5mol/L, the dilution heat of sulfuric acid of preferred 1mol/L.
5. the method according to any one of claim 1-4, wherein, device for testing oxygen evolution potential test comprises volometer (volt ohm-milliammeter), reference electrode, (epimere is thick for Glass tubing, hypomere is thin), the foraminate negative electrode of bottom belt, anode strap, wherein, Glass tubing is built with electrolytic solution, reference electrode one end is immersed in the electrolytic solution in Glass tubing, the other end of reference electrode connects potentiometer, then potentiometer is connected to anode, one end of negative electrode is connected to direct supply, then current meter is connected to, be connected to one end of anode again, the other end of negative electrode is connected with anode strap, the lower end of Glass tubing connects the aperture of cathode bottom.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510398495.2A CN104962957B (en) | 2015-07-07 | 2015-07-07 | A kind of method detecting electrolytic copper foil anode strap potential change |
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| CN201510398495.2A CN104962957B (en) | 2015-07-07 | 2015-07-07 | A kind of method detecting electrolytic copper foil anode strap potential change |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112540108A (en) * | 2019-09-23 | 2021-03-23 | 天津大学 | Method for detecting oxygen permeation of gold foil |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1278023A (en) * | 1999-06-22 | 2000-12-27 | Ga-Tek公司 | Positve electrode structure for mfg. metal foil |
| US20030217928A1 (en) * | 2002-05-23 | 2003-11-27 | Battelle Memorial Institute | Electrosynthesis of nanofibers and nano-composite films |
| CN202482447U (en) * | 2011-12-29 | 2012-10-10 | 周卫东 | Novel anode plate for crude foil engine |
-
2015
- 2015-07-07 CN CN201510398495.2A patent/CN104962957B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1278023A (en) * | 1999-06-22 | 2000-12-27 | Ga-Tek公司 | Positve electrode structure for mfg. metal foil |
| US20030217928A1 (en) * | 2002-05-23 | 2003-11-27 | Battelle Memorial Institute | Electrosynthesis of nanofibers and nano-composite films |
| CN202482447U (en) * | 2011-12-29 | 2012-10-10 | 周卫东 | Novel anode plate for crude foil engine |
Non-Patent Citations (1)
| Title |
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| 李滨: "电解铜箔铅阳极重复使用浅析", 《江西化工》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112540108A (en) * | 2019-09-23 | 2021-03-23 | 天津大学 | Method for detecting oxygen permeation of gold foil |
| CN112540108B (en) * | 2019-09-23 | 2022-12-13 | 天津大学 | Method for detecting oxygen permeation of gold foil |
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| CN104962957B (en) | 2016-11-23 |
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Address after: 247000 No. 189 Qingxi Road, Chizhou economic and Technological Development Zone, Anhui Co-patentee after: Hefei Tongguan electronic copper foil Co., Ltd Patentee after: Anhui Tongguan copper foil Group Co., Ltd Address before: 247000 No. 189 Qingxi Road, Chizhou economic and Technological Development Zone, Anhui Co-patentee before: HEFEI TONGGUAN GUOXUAN COPPER PRODUCTS Co.,Ltd. Patentee before: ANHUI TONGGUAN COPPER FOIL Co.,Ltd. |
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