CN1198131C - Metal corrosion-resisting testing device - Google Patents
Metal corrosion-resisting testing device Download PDFInfo
- Publication number
- CN1198131C CN1198131C CN 02125771 CN02125771A CN1198131C CN 1198131 C CN1198131 C CN 1198131C CN 02125771 CN02125771 CN 02125771 CN 02125771 A CN02125771 A CN 02125771A CN 1198131 C CN1198131 C CN 1198131C
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- corrosion
- test piece
- counter electrode
- aluminium
- metal
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Abstract
The present invention discloses a device for testing the corrosion resistance of metal, which comprises a container, a test piece for testing corrosion and a counter electrode, wherein electrolyte solution is filled in the container; the test piece is provided with a DC power supply appliance, and a part of the test piece for testing corrosion is immersed in the container; and a definite distance is kept between the test piece for testing corrosion and the counter electrode, a part of the counter electrode is immersed in the container, and the test piece for testing corrosion is in connect with the counter electrode to form an anode and a cathode. When DC voltage is given, ion migration is formed between the test piece and the counter electrode and can be displayed on a current meter and accumulated on an accumulator. The electrolyte solution is prepared from 5 % of salt water, the test piece is made of aluminium, and the counter electrode is made of copper. Ion migration is generated between the aluminium reference copper electrode and aluminium via a capillary pipe to set the reference potential. The device has the advantages that the metal material and the counter electrode are immersed in the electrolyte solution with electrical conductivity, the metal material and the electrode are in connection with the anode and the cathode of the power supply appliance to give definite voltage, the current flow is accumulated by the current accumulator, and the corrosion degree of metal is tested by the change of the potential difference between metal.
Description
Technical field
The present invention relates to a kind of metal corrosion-resisting testing device; particularly the metal surface form diaphragm with counter electrode in the NaCl electrolyte solution; the conduction that detects electrolyte solution when adding DC voltage changes, and can measure the proving installation of metal erosion degree.
Background technology
Metal has good advantage aspect intensity and the processing characteristics; therefore be used on mechanical part and the electronic unit more; but the low shortcoming of corrosion resistance is arranged also; therefore many researchists research of studying corrosion-resistant metal and covering the corrosion-resistant diaphragm of one deck in its surface; but for the corrosion resistance measurement that forms diaphragm on the corrosion-resistant metal surface; the main employing on the brine spray device of spray 5% salt solution on the experiment slice; the long-term method that the metal surface changes of observing of placing; utilize the corrosion-resistant method of testing of brine spray device; the extent of corrosion that can't represent experiment slice with numerical value; and user's difference; its deviation is also bigger, and is difficult to judge quality for the similar experiment slice of corrosivity.In order to remedy this problem, perhaps utilize DC potentiometer or utilize the addition AC signal and electrochemical impedance spectrum that the frequency response signal that obtains is judged, be applied to judge in the quantitative evaluation of corrosion resistance, but the equipment investment height, but also need certain professional knowledge.Particularly, be installed in the heat exchanger of household appliances such as air-conditioning or refrigerator, heat release pin and refrigerant pipe are in contact with one another, the material of heat release pin mainly is that the main material of aluminium (Al) refrigerant pipe is copper (Cu), therefore, owing to the potential difference (PD) between two kinds of metals causes the potential difference (PD) corrosion, and the prediction of extent of corrosion and evaluation method also do not have.
Summary of the invention
In order to address the above problem, the objective of the invention is to, provide a kind of utilization to detect the extent of corrosion that the metal potential difference (PD) produces quantitatively, convenient, fast, the metal corrosion-resisting testing device of quantification, thus contribute for anticorrosion exploitation, another object of the present invention also is, utilizes simple equipment to come quantitative detection corrosion of metal degree.
In order to achieve the above object, metal corrosion-resisting testing device of the present invention comprises that inside puts into container electrolyte solution, that have a certain size; Supply galvanic DC power supply to determinator; A part immerses the mensuration corrosion test piece in the container; With measure corrosion and keep the benchmark copper electrode that certain distance, a part are immersed in the counter electrode in the container and are used for setting reference potential with test piece, be connected with negative pole with the positive pole of power supply respectively with counter electrode with test piece measuring corrosion, when giving DC voltage, measuring corrosion moves with the ion that forms between test piece and the counter electrode, can be presented on the galvanometer of the anode of measuring DC power supply and cathodic electricity flow, and the formation metal corrosion-resisting testing device that links to each other with the electric current totalizer.Its electrolyte solution is 5% salt solution (NaCl), and its test corrosion is aluminium (Al) with test piece, and counter electrode is copper (Cu), and the benchmark copper electrode is connected by kapillary with the aluminium test piece, and the generation ion moves between the aluminium test piece, is used for setting reference potential.
The invention has the beneficial effects as follows, adopt metal corrosion-resisting testing device, in having the electrolyte solution of electric conductivity, immerse metal material and counter electrode, and metal material and electrode be connected on the anode of power supply unit and the negative electrode give certain voltage, and utilize the electric current totalizer accumulative total magnitude of current, utilize intermetallic potential difference (PD) to change, thereby can measure the corrosion of metal degree simply, quantitatively.
Description of drawings
Fig. 1 briefly forms synoptic diagram for the anti-metal corrosion-resisting testing device of the present invention
Fig. 2 is electric current accumulation amount of the present invention and mass change relation curve synoptic diagram.
The explanation of the critical piece symbol in the accompanying drawing.
100:5% salt solution 101: container
102: aluminium 103: copper
104: DC power supply 105: galvanometer
106: electric current totalizer 107: the benchmark copper electrode
108: kapillary
Embodiment
Below in conjunction with accompanying drawing and specific embodiments,, be described in more details metal corrosion-resisting testing device of the present invention.
As shown in the figure, the metal corrosion-resisting testing device of the present invention design has immersed the aluminium 102 and the counter electrode copper 103 of test etching extent in container 101 inside that are soaked with 5% salt solution (NaCl) 100, and aluminium 102 and copper 103 utilize DC power supply 104 to connect into anode (+) and negative electrode (-), when adding direct supply, have moving of ion between aluminium 102 and the copper 103, and, link to each other with electric current totalizer 106 at the galvanometer 105 that has connected current change between demonstration anode and the negative electrode on the DC power supply 104, simultaneously, in order to set reference potential, aluminium test piece 102 links to each other with benchmark copper electrode 107, be communicated in the container 101 through kapillary 108, make between benchmark copper electrode 107 and the aluminium test piece 102 and to produce ion and move, between aluminium 102 and copper 103, flow through electric current by salt solution 100 when when DC power supply 104 provides direct supply for aluminium 102 and copper 103, voltage being maintained 700mmv, and this electric current can appear on the galvanometer 105, and be added on the electric current totalizer 106, utilize the potential difference (PD) of aluminium and copper, measure the etching extent of aluminium 102.
Among Fig. 2 with the aluminium of naked state and for corrosion-resistant and surface treated sample (A, B, C.....F), the corrosion resistance proving installation that utilizes the present invention to design, tested the cumulative amount of each electric current, and be illustrated on the upside curve, and each mass change has been illustrated on the downside curve.Hence one can see that, depress in same electrical, the magnitude of current that flows through on the A sample of naked state is big, and mass change is also big, though and few through electric current accumulation amount in the b sample of corrosion-resistant surface processing, mass change is also very little promptly, because the amount of metal that is corroded that potential difference (PD) causes has identical tendency with the electric current accumulation amount that utilizes the corrosion-resistant proving installation of the present invention, therefore, the magnitude of current that can add up and flow through between experiment slice and the counter electrode is measured the corrosion of metal degree.
Claims (3)
1. metal corrosion-resisting testing device is characterized in that comprising that inside puts into container electrolyte solution, that have a certain size (101); Supply galvanic DC power supply (104) to determinator; A part immerses the mensuration corrosion test piece in the container; With measure corrosion and keep the benchmark copper electrode that certain distance, a part are immersed in the counter electrode in the container and are used for setting reference potential with test piece, be connected with negative pole with the positive pole of power supply respectively with counter electrode with test piece measuring corrosion, when giving DC voltage, measuring corrosion moves with the ion that forms between test piece and the counter electrode, can be presented on the galvanometer (105) of the anode of measuring DC power supply and cathodic electricity flow, and the formation metal corrosion-resisting testing device that links to each other with electric current totalizer (106).
2. metal corrosion-resisting testing device according to claim 1 it is characterized in that the test corrosion is aluminium (102) with test piece, and counter electrode is a copper.
3. metal corrosion-resisting testing device according to claim 2 is characterized in that benchmark copper electrode (107) is connected by kapillary (108) with aluminium test piece (102), and the generation ion moves between the aluminium test piece (102), is used for setting reference potential.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02125771 CN1198131C (en) | 2002-08-19 | 2002-08-19 | Metal corrosion-resisting testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02125771 CN1198131C (en) | 2002-08-19 | 2002-08-19 | Metal corrosion-resisting testing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1475791A CN1475791A (en) | 2004-02-18 |
| CN1198131C true CN1198131C (en) | 2005-04-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02125771 Expired - Fee Related CN1198131C (en) | 2002-08-19 | 2002-08-19 | Metal corrosion-resisting testing device |
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| Country | Link |
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| CN (1) | CN1198131C (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100437084C (en) * | 2005-04-30 | 2008-11-26 | 华为技术有限公司 | Method for quantizing ionic pollution degree on circuit board |
| CN101118203B (en) * | 2007-08-24 | 2010-04-14 | 武汉理工大学 | Test method of sample destroy time in tube of glass fibre reinforced plastic long-term performance test |
| CN101566555B (en) * | 2009-04-29 | 2011-07-20 | 中国科学院金属研究所 | High-precision immersed-salt hot corrosion test method |
| CN101846615B (en) * | 2010-05-17 | 2012-06-27 | 许丽涛 | Device and method for monitoring corrosion of buried steel pipelines |
| JP2012198120A (en) * | 2011-03-22 | 2012-10-18 | Seiko Epson Corp | Sensor device |
| JP5830910B2 (en) * | 2011-04-12 | 2015-12-09 | Ｊｆｅスチール株式会社 | Method for evaluating the corrosion resistance of the contents of cans |
| CN104655550B (en) * | 2015-02-13 | 2018-01-05 | 华南理工大学 | A kind of corrosion resistance detection method of plastimets |
| CN105527550B (en) * | 2015-12-12 | 2018-04-13 | 中国船舶重工集团公司第七一〇研究所 | A kind of method for supervising detection dissimilar metal state of insulation in conducting solution |
| CN107941686B (en) * | 2017-11-15 | 2020-06-23 | 清华大学 | Test simulation platform for researching electrochemical corrosion of iron pipeline and water quality change of pipe network |
| CN108362636B (en) * | 2017-12-29 | 2021-07-09 | 上海神力科技有限公司 | Method for testing corrosion resistance of bipolar plate for fuel cell |
| JP2020118468A (en) * | 2019-01-18 | 2020-08-06 | マツダ株式会社 | Corrosion resistance test device of coated metal material |
| JP6801805B1 (en) * | 2020-06-22 | 2020-12-16 | マツダ株式会社 | Measuring method and measuring device, and corrosion resistance test method and corrosion resistance test device for coated metal material |
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2002
- 2002-08-19 CN CN 02125771 patent/CN1198131C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1475791A (en) | 2004-02-18 |
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Granted publication date: 20050420 |