CN102004072B - Method and device for chlorine ion penetration test of non-conductive coating - Google Patents
Method and device for chlorine ion penetration test of non-conductive coating Download PDFInfo
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- CN102004072B CN102004072B CN 201010287367 CN201010287367A CN102004072B CN 102004072 B CN102004072 B CN 102004072B CN 201010287367 CN201010287367 CN 201010287367 CN 201010287367 A CN201010287367 A CN 201010287367A CN 102004072 B CN102004072 B CN 102004072B
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- chlorine ion
- conductive coating
- sample
- chlorion
- test
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- 238000000576 coating method Methods 0.000 title claims abstract description 54
- 238000012360 testing method Methods 0.000 title claims abstract description 52
- 239000011248 coating agent Substances 0.000 title claims abstract description 47
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 title claims abstract description 30
- 230000035515 penetration Effects 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title abstract description 9
- 229910052751 metal Inorganic materials 0.000 claims abstract description 17
- 239000002184 metal Substances 0.000 claims abstract description 17
- 230000000149 penetrating effect Effects 0.000 claims abstract description 11
- 241000370738 Chlorion Species 0.000 claims description 34
- 238000001514 detection method Methods 0.000 claims description 16
- 239000000758 substrate Substances 0.000 claims description 9
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 8
- 238000012856 packing Methods 0.000 claims description 8
- 239000007864 aqueous solution Substances 0.000 claims description 5
- 239000011780 sodium chloride Substances 0.000 claims description 4
- 239000000243 solution Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000005259 measurement Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 5
- 239000000460 chlorine Substances 0.000 abstract description 3
- 229910052801 chlorine Inorganic materials 0.000 abstract description 3
- 239000003792 electrolyte Substances 0.000 abstract description 2
- -1 chlorine ions Chemical class 0.000 abstract 1
- 238000003487 electrochemical reaction Methods 0.000 abstract 1
- 239000008151 electrolyte solution Substances 0.000 description 5
- 230000035882 stress Effects 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000000840 electrochemical analysis Methods 0.000 description 3
- 239000013535 sea water Substances 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000002847 impedance measurement Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910001510 metal chloride Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The invention discloses a method and a device for a chlorine ion penetration test of a non-conductive coating. The method comprises the steps of: respectively connecting a metal base test sample and an auxiliary electrode with the two poles of a power module, wherein the metal base test sample is in contact with the electrolyte in an electrolytic cell and has a non-conductive coating on the surface; when applying positive voltage to the sample, indirectly detecting the rate that the chlorine ion penetrates the coating to reach the metal base through detecting the current; upon the completion of once current measurement, alternately applying positive pulse voltage and negative pulse voltage to the sample by the power module so as to accelerate the coating penetration of the chlorine ion; and carrying out the chlorine ion penetration test on the non-conductive coating by orderly repeating the steps. The method and the device can precisely measure the quantity of the chlorine ions penetrating the coating to reach the surface of the metal base through precisely measuring the current generated by the chlorine ion having electrolytic or electrochemical reaction, and generate a chlorine ion impact effect on the coating to accelerate the penetration of the chlorine ion and shorten the measurement time.
Description
Technical field
The present invention relates to test method and device that a kind of non-conductive coating chlorion penetrates, be used for measuring and estimating the anti-chlorine ion penetration capacity of non-conductive coating.
Background technology
Applying non-conductive coating, comprise most of organic coatings and inorganic coating, is the effective technique that prevents metal material and corrosion of component.In the chloride ion-containing environment such as Marine atmosphere, seawater, salty soil, chlorion penetrates and causes corrosion failure is a kind of main failure mode.There is very large difference in the anti-chlorine ion penetration performance of the coating that different process and material form, need to estimate this species diversity by test.Outdoor exposure, sea water immersion and salt-fog test method are adopted in test and the evaluation of the anti-marine atmosphere of coating and briny environment always both at home and abroad.Outdoor exposure test method and sea water immersion test can obtain true and reliable test figure, but test period is longer.Salt-fog test is by improving temperature and dissolved oxygen content, accelerates the corrosion with parent metal of penetrating of chlorion, can reach and test faster and evaluation speed, but still need the test period grown.General coating requires salt-fog resistant test 500 hours, and high anti-corrosion coating is required to reach more than 1000 hours.General electro-chemical test can obtain the result in 8 hours, as adopting ac impedance measurement.But the result that traditional electro-chemical test obtains often has very large gap with actual performance, some in addition opposite evaluation conclusion can appear.Its main cause is that the traditional electrical test chemical is only considered the performance in a certain short time, fails to consider performance over time.Mainly under lab do more theoretical research with electrochemical test method, do not form practical fast appraisement method.
Summary of the invention
The purpose of this invention is to provide a kind of chlorine ion penetration test of non-conductive coating method, with the anti-chlorine ion penetration performance of the non-conductive coating of Fast Evaluation.Another object of the present invention provides a kind of chlorine ion penetration test of non-conductive coating device.
The first purpose of the present invention is achieved in that
A kind of chlorine ion penetration test of non-conductive coating method, it is characterized in that: the Metal Substrate test specimen contacted with the electrolytic cell electrolyte inside, that the surface has non-conductive coating links to each other with the two poles of the earth of power module respectively with auxiliary electrode, when sample is applied positive voltage, come the indirect detection chlorion to penetrate the speed that coating arrives Metal Substrate by detecting electric current; After finishing the primary current measurement, power module provides positive pulse alternately and negative pulse voltage to accelerate chlorion and penetrates coating; Repeat successively above-mentioned steps and carry out chlorine ion penetration test of non-conductive coating.
Described electrolytic solution is sodium chloride solution.
The second purpose of the present invention is achieved in that
A kind of chlorine ion penetration test of non-conductive coating device is characterized in that: described device comprises:
Electrolytic cell: electrolytic solution is equipped with in inside, and Metal Substrate test specimen and auxiliary electrode that the surface has non-conductive coating have been installed, and these two electrodes link to each other with the two poles of the earth of power supply respectively;
Power module: join by wire and test specimen and auxiliary electrode, when measuring the chlorion penetrating current, sample applied positive voltage, other the time sample alternately applied positive pulse and negative pulse voltage;
Current detection module: be connected in the circuit, measure the strength of current by the sample of known area, penetrate the speed that coating arrives Metal Substrate with the indirect detection chlorion.
Described electrolytic solution is sodium chloride solution.
Power supply in the described power module is two opposite polarity direct current primary powers and dc auxiliary supply.
Described electrolytic cell bottom is provided with opening, and test specimen is clipped in the middle by the packing washer of basic platform and opening part.
Described test specimen and auxiliary electrode are oppositely arranged.
In order to accelerate penetrating of chlorion, described electrolytic cell is arranged in the water bath with thermostatic control.
Described DC source comprises primary power and accessory power supply, and the output voltage range of the primary power of forward is 0～5V, and the output voltage range of reverse accessory power supply is 0～3V.
Described current detection module chlorine detection ion penetration electric current, accuracy of detection are ± 1nA to realize the output of measurement result by the AD modular converter.
Beneficial effect of the present invention is:
(1) this measurement mechanism can pass through accurately to measure the electric current of the chlorion generation that electrolysis or chemical reaction occur, thus the accurate amount that coating arrives the chlorion of metal base surface that penetrates of measuring;
(2) this measurement mechanism can produce a kind of " chlorion impact " effect to coating by applying the method for low-frequency square-wave electric stress, accelerates penetrating of chlorion, thereby shortens Measuring Time.
(3) this measurement mechanism can be introduced thermal stress by uniting to use with water bath with thermostatic control, further accelerates penetrating of chlorion, thereby further shortens Measuring Time.
Description of drawings
Fig. 1 is the embodiment of the invention 1 structural representation;
Fig. 2 is the structural representation of embodiment 2.
Embodiment
Below in conjunction with accompanying drawing specific embodiments of the invention are described in detail:
Embodiment 1:
A kind of chlorine ion penetration test of non-conductive coating method, sample and auxiliary electrode are installed in electrolytic cell, the electric power source pair of module sample alternately applies anode polarization voltage (positive voltage) and cathodic polarization voltage (negative voltage), and positive voltage makes chlorion move to non-conductive coating surface also and then penetrates this coating and arrives metal base surface; Negative voltage is so that chlorion leaves metal base surface.Adopt like this and apply alternation low-frequency square-wave electric stress, thereby non-conductive coating surface is produced a kind of " chlorion impact " effect, thereby improve the chlorion penetration speed.
Chlorion migration and the amount that penetrates detect by current detection module; Described current detection accuracy is ± 1nA to realize the output of measurement result by the AD modular converter.
As shown in Figure 1:
Described DC source comprises primary power h and accessory power supply g, and primary power h applies direct impulse at test specimen 4; Accessory power supply g applies reverse impulse at test specimen 4.Test specimen 4 and auxiliary electrode 5 are installed in the electrolytic cell 3, inject simultaneously certain density sodium chloride solution as electrolytic solution 1 in electrolytic cell 3.When applying direct impulse, chlorion anode (sample) migration is penetrated on test specimen 4 metallic matrixes chlorion gradually, produces metal chloride or is electrolyzed to produce chlorine; When applying reverse impulse, chlorion is pulled out anode (sample); Between test specimen and auxiliary electrode, apply alternation low-frequency square-wave electric stress by Single-chip Controlling K switch 1; When electrolytic cell 3 is installed in the water bath with thermostatic control, can further apply thermal stress, further accelerate penetrating of chlorion, thereby further shorten Measuring Time; Gauge tap comprises K1 and K2, and K1 applies alternation low-frequency square-wave electric stress by Single-chip Controlling between test specimen 4 and auxiliary electrode 5; Gauge tap K2 connects b point and c point successively, the amount that penetrates the chlorion of coating when connecting the b point can accurately be measured by current detection module 2, test unit applies alternation low-frequency square-wave electric stress to coating when connecting the c point, thereby produce a kind of " chlorion impact " effect, accelerate penetrating of chlorion.
The output voltage range of described primary power is 0～5V, and the output voltage range of accessory power supply is 0～3V.The voltage of primary power is enough to make the chlorion discharge, and accessory power supply voltage only expels coating surface with chlorion and gets final product, and the interference that is unlikely to produce other ions.
Control module in the power module comprises pulse producer and relay; Pulse producer produces low frequency signal, and pilot relay conducting primary power h or accessory power supply g produce a kind of " chlorion impact " effect to coating;
Current detection module detects penetrating current, and accuracy of detection is ± 1nA to realize the output of measurement result by the AD modular converter.
Embodiment 2:
As shown in Figure 2:
As different from Example 1, electrolytic cell comprises basic platform 2-2, electrolytic tank 3 and packing washer 2-1; Electrolytic tank 3 is installed on the basic platform 2-2, and packing washer 2-1 is installed in the opening part of electrolytic tank 3; Test specimen 4 is installed between packing washer 2-1 and the basic platform 2-2; Be connected with bolt between basic platform 2-2 and the electrolytic tank 3 and fastening; Packing washer 2-1 makes electrolytic solution non-leakage and work limit to measure area; In electrolytic tank 3, inject the aqueous solution of chloride ion-containing during test, auxiliary electrode 5 is installed simultaneously.
Claims (8)
1. chlorine ion penetration test of non-conductive coating method, it is characterized in that: the Metal Substrate test specimen contacted with the aqueous solution of chloride ion-containing in the electrolytic cell, that the surface has non-conductive coating links to each other with the two poles of the earth of power module respectively with auxiliary electrode, when sample applies positive voltage, come the indirect detection chlorion to penetrate the speed that coating arrives Metal Substrate by detecting electric current; After finishing primary current and measuring, the electric power source pair of module sample alternately applies positive pulse and negative pulse voltage and accelerates chlorion and penetrate coating; Repeat successively above-mentioned steps and carry out chlorine ion penetration test of non-conductive coating.
2. chlorine ion penetration test of non-conductive coating method as claimed in claim 1, it is characterized in that: the aqueous solution of described chloride ion-containing is sodium chloride solution.
3. chlorine ion penetration test of non-conductive coating device, it is characterized in that: described device comprises:
Electrolytic cell: the aqueous solution of chloride ion-containing is equipped with in inside, and Metal Substrate test specimen and auxiliary electrode that the surface has non-conductive coating have been installed, and these two electrodes link to each other with the two poles of the earth of power supply respectively;
Power module: join by wire and test specimen and auxiliary electrode, when measuring the chlorion penetrating current, sample applied positive voltage, other the time sample alternately applied positive pulse and negative pulse voltage;
Current detection module: be connected in the circuit, measure the strength of current by the sample of known area, penetrate the speed that coating arrives Metal Substrate with the indirect detection chlorion.
4. chlorine ion penetration test of non-conductive coating device, it is characterized in that: described device comprises:
Electrolytic cell: comprise basic platform, electrolytic tank and packing washer; Electrolytic tank is installed on the basic platform, and packing washer is installed in the opening part of electrolytic tank; Test specimen is installed between packing washer and the basic platform; Be connected with bolt between basic platform and the electrolytic tank and fastening; Be injected with the aqueous solution of chloride ion-containing in the electrolytic tank; Auxiliary electrode is installed in the electrolytic tank;
Power module: join by wire and test specimen and auxiliary electrode, test specimen and auxiliary electrode are connected to respectively the two poles of the earth of power module, when measuring the chlorion penetrating current, sample is applied positive pulse voltage, other the time sample alternately applied positive pulse and negative pulse voltage;
Current detection module: be connected in the circuit, measure the strength of current by the sample of known area, penetrate the speed that coating arrives Metal Substrate with the indirect detection chlorion.
5. such as claim 3 or 4 described chlorine ion penetration test of non-conductive coating devices, it is characterized in that: the power supply in the described power module is two opposite polarity direct current primary powers and dc auxiliary supply.
6. chlorine ion penetration test of non-conductive coating device as claimed in claim 5, it is characterized in that: described test specimen and auxiliary electrode are oppositely arranged.
7. chlorine ion penetration test of non-conductive coating device as claimed in claim 6, it is characterized in that: described electrolytic cell is arranged in the water bath with thermostatic control.
8. chlorine ion penetration test of non-conductive coating device as claimed in claim 7, it is characterized in that: the output voltage range of described primary power is 0～5V, the output voltage range of accessory power supply is 0～3V.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010287367 CN102004072B (en) | 2010-09-20 | 2010-09-20 | Method and device for chlorine ion penetration test of non-conductive coating |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010287367 CN102004072B (en) | 2010-09-20 | 2010-09-20 | Method and device for chlorine ion penetration test of non-conductive coating |
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| CN102004072A CN102004072A (en) | 2011-04-06 |
| CN102004072B true CN102004072B (en) | 2013-04-24 |
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| CN 201010287367 Expired - Fee Related CN102004072B (en) | 2010-09-20 | 2010-09-20 | Method and device for chlorine ion penetration test of non-conductive coating |
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| NL2010161C2 (en) * | 2013-01-22 | 2014-07-23 | Stichting Energie | Method and device for testing solar cells. |
| CN104034635B (en) * | 2014-05-30 | 2016-06-08 | 河海大学 | What colloid penetrated in dust devil measures intelligence experimental provision and operational approach thereof in real time |
| CN105486810A (en) * | 2015-12-19 | 2016-04-13 | 哈尔滨师范大学 | Measuring device for radial penetrability of negative air ions |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6919729B2 (en) * | 2003-01-06 | 2005-07-19 | Rohrback Cosasco Systems, Inc. | Corrosivity measuring device with temperature compensation |
| CN101419153A (en) * | 2007-10-24 | 2009-04-29 | 同济大学 | Automatic acquisition multichannel accelerated attack test device for measuring anti corrosion capability against chloride ion |
| CN101620217A (en) * | 2009-08-07 | 2010-01-06 | 武汉理工大学 | Device for controlling concentration of erosion solution in concrete durability experiment |
| CN101620062A (en) * | 2008-07-03 | 2010-01-06 | 同济大学 | Method for testing control of accelerating corrosion of steel reinforcement in chlorine salt corrosion concrete |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6919729B2 (en) * | 2003-01-06 | 2005-07-19 | Rohrback Cosasco Systems, Inc. | Corrosivity measuring device with temperature compensation |
| CN101419153A (en) * | 2007-10-24 | 2009-04-29 | 同济大学 | Automatic acquisition multichannel accelerated attack test device for measuring anti corrosion capability against chloride ion |
| CN101620062A (en) * | 2008-07-03 | 2010-01-06 | 同济大学 | Method for testing control of accelerating corrosion of steel reinforcement in chlorine salt corrosion concrete |
| CN101620217A (en) * | 2009-08-07 | 2010-01-06 | 武汉理工大学 | Device for controlling concentration of erosion solution in concrete durability experiment |
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