CN105277598A - Testing device and testing method for thickness of oxide film of copper rod for electrician - Google Patents
Testing device and testing method for thickness of oxide film of copper rod for electrician Download PDFInfo
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- CN105277598A CN105277598A CN201410345070.0A CN201410345070A CN105277598A CN 105277598 A CN105277598 A CN 105277598A CN 201410345070 A CN201410345070 A CN 201410345070A CN 105277598 A CN105277598 A CN 105277598A
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- copper bar
- electrician
- negative electrode
- oxide
- thickness
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Abstract
The invention provides a testing device for the thickness of an oxide film of a copper rod for an electrician. The testing device comprises a direct-current source, a data recording and processing system and an electrolytic cell for containing an electrolyte solution, wherein the electrolytic cell is internally provided with a cathode made of the copper rod for the electrician and an anode made of an inert metal; the lower end of the cathode and the lower end of the anode are both immersed into the electrolyte solution; the two ends of the direct-current source are connected with the cathode and the anode respectively; the cathode is connected with the data recording and processing system. The testing device is used for detecting the thickness of the oxide film on the surface of the copper rod for the electrician and is quite convenient and rapid to test and operate; and the thickness value of the oxide film can be accurately measured, so that the measurement precision is high and a powerful basis is provided for subsequent processing of the copper rod for the electrician.
Description
Technical field
The present invention relates to the Thickness sensitivity field of electrician with copper bar surface film oxide, particularly relate to a kind of electrician by copper bar oxide thickness proving installation and method of testing.
Background technology
Electrician refers to the round copper rod meeting GB3952 standard with copper bar, its copper content is higher, for drawing electric wire and enameled wire etc.Electrician is stack aerial with copper bar in production run in earlier stage always, therefore copper bar can with the oxygen generation oxidation reaction in air, and then forms layer oxide film on the surface of copper bar, and the composition of this oxide film is cupric oxide and cuprous oxide.Practical studies shows, the thickness size of oxide film all can cause impact in various degree to copper bar surface quality and the follow-up processing characteristics of copper bar, the thickness of oxide film is crossed conference and is caused copper bar surface blackening, have a strong impact on copper bar surface quality, simultaneously also can produce adverse influence to processing such as the follow-up wire drawing of copper bar, zinc-plated, japannings, therefore be necessary very much to measure the thickness of copper bar surface film oxide before copper bar enters production.
At present, domestic existing electrician is generally the thickness size by judging oxide film by the weight that copper bar reverses rear mensuration copper powder amount to electrician by the measuring method of copper bar oxide thickness, but, this measuring method can not directly and the accurate thickness measuring oxide film, it can only judge the size of oxide thickness qualitatively by the number of copper powder amount, measuring accuracy is very low, and result is inaccurate, therefore not can be effectively used to the measurement of oxide thickness.Meanwhile, the method troublesome poeration, needs two terminations enwinding copper bar to be measured with adhesive tape, but adhesive tape needs to press through fixture in measuring process, and it easily splits, thus scratch copper bar surface, easily cause the increase of copper powder amount, and then affect the measuring accuracy of oxide thickness.
Summary of the invention
The shortcoming of prior art in view of the above, the object of the present invention is to provide a kind of easy to operate and electrician that measuring accuracy is high with copper bar oxide thickness proving installation.
For achieving the above object, the invention provides a kind of electrician with copper bar oxide thickness proving installation, comprise DC current source, data recording and processing system and be contained with the electrolytic tank of electrolytic solution, the negative electrode be made up with copper bar of electrician and the anode be made up of inert metal is provided with in described electrolytic tank, the lower end of described negative electrode and the lower end of anode are all immersed in electrolytic solution, the two ends of described DC current source are connected with anode with negative electrode respectively, and described negative electrode is connected with data recording and processing system.
Further, also comprise a voltameter, this voltameter is connected with data recording and processing system with DC current source respectively, for measuring the size of current of DC current source output and this size of current being transferred to data recording and processing system.
Preferably, be also provided with the contrast electrode in an immersion electrolytic solution in described electrolytic tank, this contrast electrode is connected with data recording and processing system.
As mentioned above, the electrician that the present invention relates to copper bar oxide thickness proving installation, has following beneficial effect:
This proving installation is for detecting the thickness of electrician with the oxide film on copper bar surface, and test operation is very convenient, quick, and accurately can measure the one-tenth-value thickness 1/10 of oxide film, therefore measuring accuracy is high, and the following process for electrician's copper bar provides a strong foundation.
Another object of the present invention is to provide a kind of easy to operate and electrician that measuring accuracy is high by copper bar oxide thickness method of testing.
For achieving the above object, the invention provides a kind of electrician by copper bar oxide thickness method of testing, comprise the following steps successively:
1), one section of copper bar is sheared as copper bar sample from the electrician after alignment with copper bar;
2), using copper bar sample load in electrolytic tank as negative electrode, be also provided with an anode be made up of inert metal in this electrolytic tank, the lower end of described negative electrode and the lower end of anode are all immersed in the electrolytic solution held in a cell;
3), by anode be connected with the two ends of a DC current source respectively with negative electrode, negative electrode be connected with a data recording and processing system simultaneously;
4), connect DC current source, start test, then described data recording and processing system records the reduction reaction time t1 of the cuprous oxide of cathode surface and the reduction reaction time t2 of cupric oxide automatically;
5), the thickness T1 of cuprous oxide is
The thickness T2 of cupric oxide is
In above-mentioned formula: I is current value (A);
M1, M2 are respectively the molecular weight (g/mol) of cuprous oxide, cupric oxide;
S is the area (cm that negative electrode immerses in electrolytic solution
2);
D1, d2 are respectively the density (g/cm of cuprous oxide, cupric oxide
3);
F is Faraday constant, F=96500C/mol;
N is hydrogen equivalent, n=2;
6), electrician is with the thickness T=T1+T2 of copper bar oxide film.
Preferably, described electrolytic solution is the sodium carbonate liquor of 0.1mol.
Further, the material of described anode is platinum filament.
Preferably, the length of described negative electrode is 150-300mm, and the length that negative electrode immerses in electrolytic solution is at least 100mm.
Further, described step 1) also comprise the steps: the lower end filing of copper bar sample, remove the protection wax coating of copper bar sample surfaces and emulsion remained simultaneously.
As mentioned above, the electrician that the present invention relates to by copper bar oxide thickness method of testing, has following beneficial effect:
This method of testing is for detecting the thickness of electrician with the oxide film on copper bar surface, the test operation step of method of testing is very convenient, quick, and accurately can measure the one-tenth-value thickness 1/10 of oxide film, therefore measuring accuracy is high, the following process for electrician's copper bar provides a strong foundation.
Accompanying drawing explanation
Fig. 1 is the structural representation of electrician's copper bar oxide thickness proving installation in the present invention.
Fig. 2 is the reaction time figure of negative electrode in the present invention.
Element numbers explanation
1 DC current source
2 data recording and processing systems
3 electrolytic tanks
4 negative electrodes
5 anodes
6 voltameters
7 contrast electrodes
Embodiment
By particular specific embodiment, embodiments of the present invention are described below, person skilled in the art scholar the content disclosed by this instructions can understand other advantages of the present invention and effect easily.
Notice, structure, ratio, size etc. that this instructions institute accompanying drawings illustrates, content all only in order to coordinate instructions to disclose, understand for person skilled in the art scholar and read, and be not used to limit the enforceable qualifications of the present invention, therefore the not technical essential meaning of tool, the adjustment of the modification of any structure, the change of proportionate relationship or size, do not affecting under effect that the present invention can produce and the object that can reach, still all should drop on disclosed technology contents and obtain in the scope that can contain.Simultaneously, quote in this instructions as " on ", D score, "left", "right", " centre " and " one " etc. term, also only for ease of understanding of describing, and be not used to limit the enforceable scope of the present invention, the change of its relativeness or adjustment, under changing technology contents without essence, when being also considered as the enforceable category of the present invention.
As shown in Figure 1, the invention provides a kind of electrician with copper bar oxide thickness proving installation, comprise DC current source 1, data recording and processing system 2 and be contained with the electrolytic tank 3 of electrolytic solution, the negative electrode 4 be made up with copper bar of electrician and the anode 5 be made up of inert metal is provided with in described electrolytic tank 3, the lower end of described negative electrode 4 and the lower end of anode 5 are all immersed in electrolytic solution, the two ends of described DC current source 1 are connected with anode 5 with negative electrode 4 respectively, and described negative electrode 4 is connected with data recording and processing system 2.
The present invention also provides a kind of electrician by copper bar oxide thickness method of testing, comprises the following steps successively:
1), one section of copper bar is sheared as copper bar sample from the electrician after alignment with copper bar;
2), load in electrolytic tank 3 using copper bar sample as negative electrode 4, be also provided with an anode be made up of inert metal 5 in this electrolytic tank 3, the lower end of described negative electrode 4 and the lower end of anode 5 are all immersed in the electrolytic solution be contained in electrolytic tank 3; In the present embodiment, the material of described anode 5 is platinum filament;
3), by anode 5 be connected with the two ends of a DC current source 1 respectively with negative electrode 4, negative electrode 4 be connected with a data recording and processing system 2 simultaneously;
4), connect DC current source 1, start test, then the automatic reduction reaction time t1 of cuprous oxide and the reduction reaction time t2 of cupric oxide recording negative electrode 4 surface of described data recording and processing system 2;
5), the thickness T1 of cuprous oxide is
The thickness T2 of cupric oxide is
In above-mentioned formula: I is current value (A);
M1, M2 are respectively the molecular weight (g/mol) of cuprous oxide, cupric oxide;
S is the area (cm that negative electrode 4 immerses in electrolytic solution
2);
D1, d2 are respectively the density (g/cm of cuprous oxide, cupric oxide
3), d1=6.0g/cm
3, d2=6.4g/cm
3;
F is Faraday constant, F=96500C/mol;
N is hydrogen equivalent, is a constant, n=2;
6), electrician is with the thickness T=T1+T2 of copper bar oxide film.
Above-mentioned proving installation and method of testing adopt electrolytic process to test the thickness of electrician with the oxide film on copper bar surface, and described oxide film is made up of cuprous oxide and cupric oxide.During test, using from electrician to be measured with the copper bar sample of one section of certain length that copper bar is sheared as negative electrode 4, connect after DC current source 1 starts test, electrolytic solution, by after electrolysis, produces hydrogen ion at negative electrode 4 place; Because electromotive force height is different, hydrogen ion successively reacts with cuprous oxide and cupric oxide generation electrolytic reduction successively, and reactive chemistry formula is respectively: Cu
2o+2H
+=2Cu+H
2o; CuO+2H
+=Cu+H
2o; After cuprous oxide and cupric oxide are all reacted by electrolytic reduction, then the surface of negative electrode 4 starts to produce bubble, this bubble i.e. hydrogen, now shows that experiment terminates, can close DC current source 1.In whole test process, data recording and processing system 2 records the voltage of whole duration of test and corresponding reaction time automatically; The curve in voltage---reaction time as shown in Figure 2, as can be seen from Figure 2: cuprous oxide Cu
2the reaction velocity of O is faster, at cuprous oxide Cu
2the curve that O terminates the time t1 place correspondence of reacting forms the first flex point, and this first flex point is also the beginning reaction time of cupric oxide CuO; After cupric oxide CuO reacts a period of time t2, curve forms Second Inflexion Point, and this Second Inflexion Point is that cupric oxide CuO reacts the time terminated, and after this negative electrode 4 surface starts to produce bubble, and the slope of a curve in voltage---reaction time slows down.By catching, voltage---the point of inflexion on a curve in reaction time obtains the reaction time t1 of cuprous oxide and the reaction time t2 of cupric oxide to described data recording and processing system 2, again according to step 5) in formula calculate the thickness T1 of cuprous oxide and the thickness T2 of cupric oxide respectively, finally the thickness T2 addition of the thickness T1 of cuprous oxide and cupric oxide can be obtained the thickness T of electrician with the oxide film on copper bar surface, the unit of described T1, T2, T is cm.
It can thus be appreciated that, the proving installation that the present invention relates to and method of testing are when detecting the thickness of electrician with copper bar surface film oxide, test operation step is very convenient, quick, and accurately can measure the one-tenth-value thickness 1/10 of oxide film, therefore measuring accuracy is high, the following process for electrician's copper bar provides a strong foundation.
Further, as shown in Figure 1, also comprise a voltameter 6, this voltameter 6 is connected with data recording and processing system 2 with DC current source 1 respectively, described voltameter 6 also known as coulombmeter, for measure DC current source 1 export size of current and this size of current is transferred to data recording and processing system 2.Before testing, by the initial parameter of copper bar sample (namely M1, M2, S, d1, d2, F, n) input in data recording and processing system 2, data recording and processing system 2 automatic capturing reaction time t1 and t2 in experimentation, the size of current value I is transferred to data recording and processing system 2 by voltameter 6 simultaneously, therefore automatically can be calculated by data recording and processing system 2 after inside programming and show the measurement result value of oxide thickness, thus realize automatic measurement and robotization calculating, improve testing efficiency and computational accuracy.
Preferably, as shown in Figure 1, be also provided with the contrast electrode 7 in an immersion electrolytic solution in described electrolytic tank 3, this contrast electrode 7 is connected with data recording and processing system 2.Described contrast electrode 7, for finding potential balance, ensures that proving installation starts the zeroing before testing, thus improves the measuring accuracy of oxide thickness, greatly reduce error.
Preferably, in the present embodiment, described electrolytic solution is the sodium carbonate liquor of 0.1mol, and the carbanion in sodium carbonate liquor belongs to weak acid root, and it can be hydrolyzed reaction: Na with water
2cO
3+ H
2o==NaOH+NaHCO
3; NaHCO after energising
3in HCO3
-=H
++ CO
3 2-, provide reaction H
+.
Further, the length of described negative electrode 4 is 150-300mm, and the length that negative electrode 4 immerses in electrolytic solution is at least 100mm.In addition; described step 1) also comprise the steps: the lower end filing of copper bar sample by file or other modes; conscientiously clean up copper bar sample with alcohol or other organic solvents simultaneously; to remove the protection wax coating of copper bar sample surfaces and emulsion remained; again copper bar sample is loaded in electrolytic tank 3 as negative electrode 4 afterwards; to improve measuring accuracy, reduce the measuring error caused because copper bar sample surfaces there is impurity.
In sum, the present invention effectively overcomes various shortcoming of the prior art and tool high industrial utilization.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.Any person skilled in the art scholar all without prejudice under spirit of the present invention and category, can modify above-described embodiment or changes.Therefore, such as have in art usually know the knowledgeable do not depart from complete under disclosed spirit and technological thought all equivalence modify or change, must be contained by claim of the present invention.
Claims (8)
1. an electrician is with copper bar oxide thickness proving installation, it is characterized in that: comprise DC current source, data recording and processing system and be contained with the electrolytic tank of electrolytic solution, the negative electrode be made up with copper bar of electrician and the anode be made up of inert metal is provided with in described electrolytic tank, the lower end of described negative electrode and the lower end of anode are all immersed in electrolytic solution, the two ends of described DC current source are connected with anode with negative electrode respectively, and described negative electrode is connected with data recording and processing system.
2. electrician according to claim 1 is with copper bar oxide thickness proving installation, it is characterized in that: also comprise a voltameter, this voltameter is connected with data recording and processing system with DC current source respectively, for measuring the size of current of DC current source output and this size of current being transferred to data recording and processing system.
3. electrician according to claim 1 is with copper bar oxide thickness proving installation, it is characterized in that: be also provided with the contrast electrode in an immersion electrolytic solution in described electrolytic tank, this contrast electrode is connected with data recording and processing system.
4. electrician is by a copper bar oxide thickness method of testing, it is characterized in that: comprise the following steps successively:
1), one section of copper bar is sheared as copper bar sample from the electrician after alignment with copper bar;
2), using copper bar sample load in electrolytic tank as negative electrode, be also provided with an anode be made up of inert metal in this electrolytic tank, the lower end of described negative electrode and the lower end of anode are all immersed in the electrolytic solution held in a cell;
3), by anode be connected with the two ends of a DC current source respectively with negative electrode, negative electrode be connected with a data recording and processing system simultaneously;
4), connect DC current source, start test, then described data recording and processing system records the reduction reaction time t1 of the cuprous oxide of cathode surface and the reduction reaction time t2 of cupric oxide automatically;
5), the thickness T1 of cuprous oxide is
The thickness T2 of cupric oxide is
In above-mentioned formula: I is current value (A);
M1, M2 are respectively the molecular weight (g/mol) of cuprous oxide, cupric oxide;
S is the area (cm that negative electrode immerses in electrolytic solution
2);
D1, d2 are respectively the density (g/cm of cuprous oxide, cupric oxide
3);
F is Faraday constant, F=96500C/mol;
N is hydrogen equivalent, n=2;
6), electrician is with the thickness T=T1+T2 of copper bar oxide film.
5. electrician according to claim 4 is by copper bar oxide thickness method of testing, it is characterized in that: described electrolytic solution is the sodium carbonate liquor of 0.1mol.
6. electrician according to claim 4 is by copper bar oxide thickness method of testing, it is characterized in that: the material of described anode is platinum filament.
7. electrician according to claim 4 is by copper bar oxide thickness method of testing, it is characterized in that: the length of described negative electrode is 150-300mm, and the length that negative electrode immerses in electrolytic solution is at least 100mm.
8. electrician according to claim 4 is by copper bar oxide thickness method of testing, it is characterized in that: described step 1) also comprise the steps: the lower end filing of copper bar sample, remove the protection wax coating of copper bar sample surfaces and emulsion remained simultaneously.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108287227A (en) * | 2017-12-25 | 2018-07-17 | 新兴铸管（浙江）铜业有限公司 | A kind of diameter 8mm continuous casting and rolling low oxygens copper bar high oxygen content accuracy checking method |
| CN109000600A (en) * | 2018-07-25 | 2018-12-14 | 上海纳米技术及应用国家工程研究中心有限公司 | The devices and methods therefor of measurement and verifying membrane pore size |
| CN111487267A (en) * | 2020-04-09 | 2020-08-04 | 哈尔滨工业大学 | Method for stripping double-layer oxide film defect in aluminum bronze alloy |
| CN112577409A (en) * | 2020-12-10 | 2021-03-30 | 广州添利电子科技有限公司 | PCB through hole tin layer thickness equipment and electrochemical timing electric quantity method testing method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108287227A (en) * | 2017-12-25 | 2018-07-17 | 新兴铸管（浙江）铜业有限公司 | A kind of diameter 8mm continuous casting and rolling low oxygens copper bar high oxygen content accuracy checking method |
| CN108287227B (en) * | 2017-12-25 | 2020-10-13 | 新兴铸管（浙江）铜业有限公司 | High-precision detection method for oxygen content of 8 mm-diameter continuous casting and rolling low-oxygen copper rod |
| CN109000600A (en) * | 2018-07-25 | 2018-12-14 | 上海纳米技术及应用国家工程研究中心有限公司 | The devices and methods therefor of measurement and verifying membrane pore size |
| CN109000600B (en) * | 2018-07-25 | 2020-09-18 | 上海纳米技术及应用国家工程研究中心有限公司 | Device and method for measuring and verifying diaphragm aperture |
| CN111487267A (en) * | 2020-04-09 | 2020-08-04 | 哈尔滨工业大学 | Method for stripping double-layer oxide film defect in aluminum bronze alloy |
| CN111487267B (en) * | 2020-04-09 | 2023-04-14 | 哈尔滨工业大学 | Method for stripping double-layer oxide film defect in aluminum bronze alloy |
| CN112577409A (en) * | 2020-12-10 | 2021-03-30 | 广州添利电子科技有限公司 | PCB through hole tin layer thickness equipment and electrochemical timing electric quantity method testing method thereof |
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