CN1198132C - Detecting sysytem for metal corrosion resistance - Google Patents
Detecting sysytem for metal corrosion resistance Download PDFInfo
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- CN1198132C CN1198132C CN 02129130 CN02129130A CN1198132C CN 1198132 C CN1198132 C CN 1198132C CN 02129130 CN02129130 CN 02129130 CN 02129130 A CN02129130 A CN 02129130A CN 1198132 C CN1198132 C CN 1198132C
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- metal
- electrolyte solution
- electrode
- corrosion resistance
- detecting
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 72
- 239000002184 metal Substances 0.000 title claims abstract description 72
- 238000005260 corrosion Methods 0.000 title claims abstract description 25
- 230000007797 corrosion Effects 0.000 title claims abstract description 25
- 238000012360 testing method Methods 0.000 claims abstract description 43
- 239000008151 electrolyte solution Substances 0.000 claims abstract description 41
- 239000010949 copper Substances 0.000 claims abstract description 19
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910052802 copper Inorganic materials 0.000 claims abstract description 17
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 9
- 239000004411 aluminium Substances 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- 238000005259 measurement Methods 0.000 claims description 8
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 5
- 238000000034 method Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 150000001455 metallic ions Chemical group 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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Abstract
The present invention provides a system for detecting the corrosion resistance of metal, which comprises a container, a metal test piece and a corresponding metal electrode, a DC power source, a reference copper electrode and an electric conductivity tester, wherein electrolyte solution is contained in the container; a part of the metal test piece is immersed in the electrolyte solution contained in the container; a part of the corresponding metal electrode is immersed in the electrolyte solution contained in the container, and a certain distance is kept between the metal test piece and the corresponding metal electrode which are oppositely arranged; the positive electrode and the negative electrode of the DC power source are respectively connected with the metal test piece and the corresponding metal electrode; a part of the reference copper electrode is immersed in the electrolyte solution, and the reference copper electrode is connected with the positive electrode of the DC power source; a part of the test electrode of the electric conductivity tester is immersed in the electrolyte solution contained in the container. The present invention has the advantages of simple structure, convenient operation and low cost, and can quantitatively detect the corrosion resistance of metal.
Description
Technical field
The present invention relates to a kind of metallicity pick-up unit, particularly relate to a kind of detecting sysytem for metal corrosion resistance.
Background technology
As everyone knows, metal has the advantage of physical strength height and good processability, thereby is widely used in the manufacturing of mechanical part and electronic unit, but metal has the relatively poor shortcoming of decay resistance simultaneously.Therefore, the research that the researchist is being devoted to corrosion resistant metal always and is covering the corrosion-resistant diaphragm of one deck in the metal surface is to improve the decay resistance of metal.
In above-mentioned research, must relate to the detection method of metal corrosion-resisting.Metal corrosion-resisting detection method at present commonly used is: be 5% salt solution with sprayer in the surface sprinkling concentration of metal testing plate at first, the routine observation metal testing plate surface situation that is corroded is then measured the decay resistance of metal to be measured.
But the shortcoming of above-mentioned brine spray method is: test out of true, because can't represent the extent of corrosion of metal testing plate quantitatively, the influence of the examined personnel's of testing result subjective factor is bigger, is difficult to obtain accurate, objective testing result.
At present, can measure metal corrosion-resisting quantitatively though utilize some instrument (for example: DC potentiometer or electrochemical impedance spectroscope (EIS)), but these instrument price general charged costlinesses, operating personnel need have higher professional knowledge, thereby are difficult to popularize.
Need especially a kind of easy to operate, cheap and can detect the pick-up unit of metal corrosion-resisting quantitatively in the actual life.For example, have in the household appliances of heat exchanger at air conditioner or refrigerator etc., heat radiator and cold coal pipe generally are in contact with one another, (material of heat radiator mainly is an aluminium because the two is made with different metal material, and the material of cold coal pipe mainly is a copper), the difference of potential difference (PD) will cause galvanic corrosion between the two, quicken two kinds of processes that material is corroded, be badly in need of a kind of suitable device quantitative measurement is carried out in this type of corrosion, and then find out solution.
Summary of the invention
Technical matters to be solved by this invention is, overcomes the shortcoming of prior art and device, and a kind of detecting sysytem for metal corrosion resistance of simple in structure, easy to operate, cheap quantitative measurement technology corrosion resistance is provided.
In order to solve the problems of the technologies described above, the technical scheme that detecting sysytem for metal corrosion resistance of the present invention adopts is: detecting sysytem for metal corrosion resistance comprises: inside fills the container of electrolyte solution; Part immerses the metal testing plate of described container internal electrolyte solution; The corresponding metal electrode that part immerses described container internal electrolyte solution and keeps certain distance to be provided with in opposite directions with metal testing plate; The direct supply that its positive and negative electrode is connected with corresponding metal electrode with metal testing plate respectively; The benchmark copper electrode that part immerses electrolyte solution and is connected with described dc power anode; Its test electrode partly immerses the conductivity measurement of described container internal electrolyte solution.
Described electrolyte solution is that concentration is 0.05～10% salt (NaCl) water.
The material of described metal testing plate is aluminium (Al), and the material of described corresponding metal electrode is copper (Cu).
The electrolyte solution that described benchmark copper electrode immerses is the electrolyte solution in the described container that drinks up by a kapillary.
The principle of work of detecting sysytem for metal corrosion resistance of the present invention is: connect direct supply, produce electric current in the electrolytic solution between metal testing plate and the corresponding metal electrode, metal testing plate and the corresponding surface of metal electrode speed that is corroded is aggravated, constantly there is metallic ion to enter electrolytic solution, makes the conductivity of electrolytic solution increase.Regularly detect the conductivity of electrolytic solution by conductivity measurement, draw out electrolytic conductivity curve over time, can detect the corrosion resistance of metal testing plate quantitatively.
The invention has the beneficial effects as follows: simple in structure, easy to operate, cheap, can detect the decay resistance of metal quantitatively.
Description of drawings
Fig. 1 is the structural representation of detecting sysytem for metal corrosion resistance embodiment of the present invention;
Fig. 2 is the conductivity curve over time of electrolytic solution in detecting two kinds of metal testing plate processes.
Among the figure:
100: electrolytic solution 101: container
102: metal testing plate 103: corresponding metal electrode
104: direct supply 105: conductance measurement
107: benchmark copper electrode 108: kapillary
Embodiment
Below in conjunction with the drawings and specific embodiments detecting sysytem for metal corrosion resistance of the present invention is described in further detail:
As shown in Figure 1, this detecting sysytem for metal corrosion resistance comprises: inside fills the container 101 of electrolyte solution 100; Part immerses the metal testing plate 102 of described container internal electrolyte solution; The corresponding metal electrode 103 that part immerses described container internal electrolyte solution and keeps certain distance to be provided with in opposite directions with metal testing plate 102; The direct supply 104 that its positive and negative electrode is connected with corresponding metal electrode with metal testing plate respectively; The benchmark copper electrode 107 that part immerses electrolyte solution and is connected with described dc power anode; Its test electrode partly immerses the conductivity measurement 105 of described container internal electrolyte solution.
In this embodiment, described electrolyte solution 100 is that concentration is 0.05～10% salt (NaCl) water.
The material of described metal testing plate 102 is aluminium (Al), and the material of described corresponding metal electrode 103 is copper (Cu).
The electrolyte solution that described benchmark copper electrode immerses is the electrolyte solution in the described container that drinks up by a kapillary 108.
The course of work to present embodiment is illustrated below: connect direct supply 104, produce electric current in the electrolytic solution 100 between aluminium test piece 102 and the corresponding copper electrode 103, aluminium test piece 102 and the corresponding copper electrode 103 surfaces speed that is corroded is aggravated, constantly there is metallic ion to enter electrolytic solution 100, makes the conductivity of electrolytic solution 100 increase.Regularly detect the conductivity of electrolytic solution 100 by conductivity measurement 105, draw out electrolytic conductivity curve over time, can detect the corrosion resistance of aluminium test piece 102 quantitatively.In the testing process, regulate direct supply, make that aluminium test piece 102 is 500mmv-200mv with voltage between the corresponding copper electrode 103.
Fig. 2 shows under similarity condition the conductivity curve over time that detects electrolytic solution in two kinds of metal testing plate processes, testing result when the testing result when wherein curve A represents that metal testing plate is naked aluminium flake, curve B represent that metal testing plate is the surface through the aluminium flake of corrosion-resistance treatment.Contrast two curves as can be seen, the conductivity of electrolytic solution was pushed the speed comparatively fast when metal testing plate was naked aluminium flake, metal testing plate for the surface during through the aluminium flake of corrosion-resistance treatment conductivity push the speed slowlyer, illustrate that the corrosion resistance of the aluminium flake of surface process corrosion-resistance treatment is better than naked aluminium flake greatly.
Claims (4)
1. detecting sysytem for metal corrosion resistance, it is characterized in that: comprising: inside fills the container (101) of electrolyte solution (100); Part immerses the metal testing plate (102) of described container internal electrolyte solution; The corresponding metal electrode (103) that part immerses described container internal electrolyte solution and keeps certain distance to be provided with in opposite directions with metal testing plate (102); Its direct supply (104) that positive pole is connected with metal testing plate (102), negative pole is connected with corresponding metal electrode (103); The benchmark copper electrode (107) that part immerses electrolyte solution and is connected with described dc power anode; Its test electrode partly immerses the conductivity measurement (105) of described container internal electrolyte solution.
2. detecting sysytem for metal corrosion resistance according to claim 1 is characterized in that: described electrolyte solution (100) is that concentration is 0.05～10% saline solution.
3. detecting sysytem for metal corrosion resistance according to claim 1 is characterized in that: the material of described metal testing plate (102) is an aluminium, and the material of described corresponding metal electrode (103) is a copper.
4. detecting sysytem for metal corrosion resistance according to claim 1 is characterized in that: the electrolyte solution that described benchmark copper electrode immerses is the interior electrolyte solution of described container that drinks up by a kapillary (108).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02129130 CN1198132C (en) | 2002-08-19 | 2002-08-19 | Detecting sysytem for metal corrosion resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02129130 CN1198132C (en) | 2002-08-19 | 2002-08-19 | Detecting sysytem for metal corrosion resistance |
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|---|---|
| CN1474174A CN1474174A (en) | 2004-02-11 |
| CN1198132C true CN1198132C (en) | 2005-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 02129130 Expired - Fee Related CN1198132C (en) | 2002-08-19 | 2002-08-19 | Detecting sysytem for metal corrosion resistance |
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| CN (1) | CN1198132C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101377461B (en) * | 2007-08-28 | 2011-07-13 | 宝山钢铁股份有限公司 | Apparatus and method for measuring welding tube corrosion under stress condition |
| CN102980845B (en) * | 2012-12-10 | 2015-04-29 | 奥瑞金包装股份有限公司 | Method for accelerating color printing iron corrosion by using electrochemical cathodic polarization |
| CN104849199A (en) * | 2015-05-20 | 2015-08-19 | 广东美的暖通设备有限公司 | Metal pipe pitting-resistant property evaluation device and metal pipe pitting-resistant property evaluation method |
| CN106468651A (en) * | 2016-09-22 | 2017-03-01 | 国网山东省电力公司电力科学研究院 | A kind of atmospheric corrosiveness on-line monitoring system and its method |
| CN107941684A (en) * | 2017-12-20 | 2018-04-20 | 佛山科学技术学院 | A kind of easy metal material corrosion resistance test infuser device |
| CN112669913B (en) * | 2020-12-18 | 2024-02-09 | 安徽工业大学 | Method for determining influence factor of active sulfide content on naphthenic acid corrosion rate |
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2002
- 2002-08-19 CN CN 02129130 patent/CN1198132C/en not_active Expired - Fee Related
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