CN112881275A - Electrochemical experimental method for rapidly evaluating corrosion resistance of coating - Google Patents
Electrochemical experimental method for rapidly evaluating corrosion resistance of coating Download PDFInfo
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Abstract
The invention discloses an electrochemical experimental method for rapidly evaluating the corrosion resistance of a coating, which comprises the following steps: (1) soaking the steel plate with the coating in artificial seawater for 20-800h, and then stripping the coating on one surface of the steel plate; (2) placing the processed steel plate into an electrochemical device, connecting the anode and the cathode of the electrochemical device to an external electrochemical workstation, setting impedance test parameters (3) of the electrochemical workstation to carry out constant potential polarization on the system, and starting to measure EIS after the open circuit potential is stable to obtain an impedance spectrum; (4) and (4) calculating the area under the Bode graph curve, obtaining the area under the line of each soaking stage, obtaining the area change rate, and further quickly evaluating the corrosion resistance of the coating. The electrochemical experimental method provided by the invention is simple and convenient, can be used for on-site real-time detection, and can be used for rapidly evaluating the corrosion resistance of the coating.
Description
Technical Field
The invention relates to the field of coating corrosion resistance evaluation methods, in particular to an electrochemical experimental method for rapidly evaluating the corrosion resistance of a coating.
Background
As a large offshore steel structure, the marine wind power is in a severe corrosion environment such as high temperature, high humidity and salt fog for a long time, and corresponding anticorrosion measures are required to be taken on the steel structure. The organic heavy-duty anticorrosive coating is widely applied to protection engineering of ocean wind power due to the characteristics of good economy, high construction convenience, wide application range and the like. Coatings have been used for decades as an effective protective means, but there is always a lack of methods for on-site quantitative evaluation or rapid on-site detection of coating performance, coating protection status, and coating failure rating.
The classic conventional experimental methods comprise a salt spray experiment, a circulating corrosion experiment, a weather resistance experiment, a soaking experiment, an artificial aging experiment, a damp and hot experiment and the like, but the methods can only be qualitatively described and have a plurality of defects, wherein the experimental period is long, the experimental result is not accurate enough, and the repeatability is poor, so that the method is the most popular problem for enterprises. Compared with the conventional coating detection method, the method has the advantages of quick and simple electrochemistry, abundant provided information amount, capability of guiding the deep research on the corrosion mechanism of metal under the coating and quantitative and semi-quantitative evaluation on the protective performance of the coating.
EIS (electrochemical impedance spectroscopy) is the most important electrochemical method for researching the corrosion prevention mechanism and performance of the organic heavy-duty anticorrosive coating. The EIS test is to apply a small-amplitude sine alternating signal to a tested system (medium/coating/metal) for disturbance, measure the impedance spectrum or admittance spectrum of the system, and analyze by using an equivalent circuit model to obtain electrochemical information in the system. The EIS test can respectively obtain the information related to the coating performance and the coating damage process, such as solution resistance, coating resistance, oil layer resistance, interface reaction resistance, interface double-layer capacitance and the like in different frequency ranges, and can reflect the change of the coating performance in real time. For the impedance spectrum obtained by an electrochemical experiment, a plurality of data processing methods exist, the most common method at present is an equivalent circuit method, but the method usually needs mature software and more experience to obtain a relatively real result, and meanwhile, the measured data is difficult to completely conform to an established equivalent circuit model. Other methods mainly utilize impedance spectrum high-frequency region data for evaluation, for example, a characteristic frequency method, frequency corresponding to the maximum phase angle, minimum phase angle value and the like are utilized to qualitatively evaluate the protective performance of the coating, and accurate EIS data are not needed in the methods. However, the method has the biggest problem that the electrochemical behavior of the coating cannot be completely reflected only by partial data of impedance spectrum, and meanwhile, the method is not beneficial to rapidly evaluating the coating system in service life on site.
Disclosure of Invention
Aiming at the technical problems, the invention provides an electrochemical experimental method for rapidly evaluating the corrosion resistance of a coating, which utilizes the impedance spectrum and the area change under a Bode graph line to comprehensively evaluate the protective performance of a coating system, and can rapidly detect and complete the field quantitative evaluation.
In order to achieve the purpose, the invention provides the following technical scheme:
an electrochemical experimental method for rapidly evaluating the corrosion resistance of a coating comprises the following steps:
(1) soaking the steel plate with the coating in artificial seawater for 20-800h, and then stripping the coating on one surface of the steel plate;
(2) putting the steel plate processed in the step (1) into an electrochemical device, connecting the anode and the cathode of the electrochemical device to an external electrochemical workstation, and setting impedance test parameters of the electrochemical workstation, wherein the impedance test parameters are set as follows:
direct current potential: 0 mV;
the amplitude of the alternating current is 10 mV;
frequency sweep range: 100k-0.01 HZ;
logarithmic scanning, and counting 10 points per decade of frequency;
(3) carrying out constant potential polarization on the system, and measuring EIS after the open circuit potential is stable to obtain an impedance spectrum;
(4) and (4) calculating the area under the Bode graph curve to obtain the area under the line of each soaking stage of the coating, so as to obtain the area change rate, and further quickly evaluating the corrosion resistance of the coating.
Furthermore, electrochemical device demountable installation, including upper base, lower base, steel sheet, pressure sealing plate, electrochemistry liquid tank, SCE reference electrode and platinum sheet auxiliary electrode, the steel sheet is placed on the lower base, pressure sealing plate places the top of steel sheet, be equipped with the trompil in the middle of the pressure sealing plate, electrochemistry liquid tank is placed on pressure sealing plate position placed in the middle, is connected with the steel sheet through the trompil in the middle of the pressure sealing plate, the upper base lid is in the top of electrochemistry liquid tank, it has a plurality of round holes to open on the upper base, SCE reference electrode and platinum sheet auxiliary electrode are put into electrochemistry liquid tank through the round hole, electrochemistry liquid pours into electrochemistry liquid tank through the round hole in, upper base and lower base are closely fixed connection through fixing bolt all around.
Further, the electrochemical liquid in the electrochemical device is artificial seawater.
Furthermore, the electrochemical device is placed in a shielding box, so that the influence of external vibration on an experimental result is reduced.
Further, the calculation method of the area under the Bode graph curve is one or more of a numerical interpolation method and a Simpson's Law.
The electrochemical state of the coating undergoes a series of changes as corrosion progresses, which are reflected in the impedance spectrum. In the Bode graph, both the curve and the value decrease with the increase of the soaking time, the area S under the curve gradually decreases with the increase of the soaking time, and the area under the Bode graph represents the protective performance left after the coating is corroded. Therefore, the change in area under the Bode plot can be used as a parameter to evaluate the change in coating performance.
The area change rate can be calculated by the following formula (1):
DPt＝100(φt-φ0)/φ0(1)
wherein phi istShows the rate of change of area under the Bode plot after a period of etching, phi0Area under Bode plot, DP, of the impedance spectrum of the unsqueled original coating systemtThe area under the Bode plot of the coating system impedance spectrum after a period of etching is shown. The corrosion resistance of the coatings can be rapidly evaluated by comparing the area change rate of each coating.
Compared with the prior art, the invention has the beneficial effects that:
according to the electrochemical experimental method for rapidly evaluating the corrosion resistance of the coating, provided by the invention, an impedance spectrum and a Bode graph of the coating are obtained by performing an electrochemical experiment on the coating, and the protective performance of a coating system is comprehensively evaluated by utilizing the area change under the impedance spectrum and the Bode graph. The method is rapid, simple and convenient, and can realize quantitative and semi-quantitative evaluation on the protective performance of the coating. And the method for comprehensively evaluating the protective performance of the coating system by using the impedance spectrum and the area change under the Bode graph is rarely seen at present. Therefore, the electrochemical experimental method for rapidly evaluating the corrosion resistance of the coating has good application value and research significance.
Drawings
FIG. 1 is a schematic view of the structure of an electrochemical device according to the present invention;
FIG. 2 is an impedance versus frequency plot and a phase angle versus frequency plot for the described embodiment of the invention and a comparative example;
the reference numbers in the above figures are as follows:
1-an upper base; 2-a lower base; 3-working electrode steel plate; 4-sealing the pressing plate; 5-electrochemical liquid tank; 6-SCE reference electrode; 7-platinum sheet auxiliary electrode; 8-fastening bolts.
Detailed Description
The following further describes a specific embodiment of the present invention with reference to the drawings by using specific examples, which are intended to describe the technical solution in detail, but not to limit the technical solution. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Soaking the coated steel plate 1 in artificial seawater for 24h respectively to form a coating on one surface of a glass steel plate, then installing the steel plate in an electrochemical device, connecting one surface of a stripped coating with an electrode of the electrochemical device, injecting a proper amount of artificial seawater into the electrochemical device by using a needle cylinder, connecting the electrochemical device, an electrochemical workstation and a computer, and putting the whole electrochemical device into a shielding box. The electrochemical workstation was started and was a princeton model 273A electrochemical workstation. Before testing, impedance testing parameters were set as follows:
direct current potential: 0 mV;
the amplitude of the alternating current is 10 mV;
frequency sweep range: 100k-0.01 HZ;
logarithmic scanning, and counting 10 points per decade of frequency;
and (4) carrying out constant potential polarization on the system, and measuring the EIS after the open circuit potential is stable to obtain an impedance spectrum. And (4) calculating the area under the Bode graph curve to obtain the area under the line of each soaking stage of the coating, so as to obtain the area change rate, and further quickly evaluating the corrosion resistance of the coating.
Example 2
Soaking the coated steel plate 1 in artificial seawater for 360h respectively to form a coating on one surface of a glass steel plate, then installing the steel plate in an electrochemical device, connecting one surface of a stripped coating with an electrode of the electrochemical device, injecting a proper amount of artificial seawater into the electrochemical device by using a needle cylinder, connecting the electrochemical device, an electrochemical workstation and a computer, and putting the whole electrochemical device into a shielding box. The electrochemical workstation was started and was a princeton model 273A electrochemical workstation. Before testing, impedance testing parameters were set as follows:
direct current potential: 0 mV;
the amplitude of the alternating current is 10 mV;
frequency sweep range: 100k-0.01 HZ;
logarithmic scanning, and counting 10 points per decade of frequency;
and (4) carrying out constant potential polarization on the system, and measuring the EIS after the open circuit potential is stable to obtain an impedance spectrum. And (4) calculating the area under the Bode graph curve to obtain the area under the line of each soaking stage of the coating, so as to obtain the area change rate, and further quickly evaluating the corrosion resistance of the coating.
Example 3
Soaking the coated steel plate 1 in artificial seawater for 720h respectively to form a coating on one surface of a glass steel plate, then installing the steel plate in an electrochemical device, connecting one surface of a stripped coating with an electrode of the electrochemical device, injecting a proper amount of artificial seawater into the electrochemical device by using a needle cylinder, connecting the electrochemical device, an electrochemical workstation and a computer, and putting the whole electrochemical device into a shielding box. The electrochemical workstation was started and was a princeton model 273A electrochemical workstation. Before testing, impedance testing parameters were set as follows:
direct current potential: 0 mV;
the amplitude of the alternating current is 10 mV;
frequency sweep range: 100k-0.01 HZ;
logarithmic scanning, and counting 10 points per decade of frequency;
and (4) carrying out constant potential polarization on the system, and measuring the EIS after the open circuit potential is stable to obtain an impedance spectrum. And (4) calculating the area under the Bode graph curve to obtain the area under the line of each soaking stage of the coating, so as to obtain the area change rate, and further quickly evaluating the corrosion resistance of the coating.
Example 4
Soaking the coated steel plate 2 in artificial seawater for 24h respectively to form a coating on one surface of a glass steel plate, then installing the steel plate in an electrochemical device, connecting one surface of a stripped coating with an electrode of the electrochemical device, injecting a proper amount of artificial seawater into the electrochemical device by using a needle cylinder, connecting the electrochemical device, an electrochemical workstation and a computer, and putting the whole electrochemical device into a shielding box. The electrochemical workstation was started and was a princeton model 273A electrochemical workstation. Before testing, impedance testing parameters were set as follows:
direct current potential: 0 mV;
the amplitude of the alternating current is 10 mV;
frequency sweep range: 100k-0.01 HZ;
logarithmic scanning, and counting 10 points per decade of frequency;
and (4) carrying out constant potential polarization on the system, and measuring the EIS after the open circuit potential is stable to obtain an impedance spectrum. And (4) calculating the area under the Bode graph curve to obtain the area under the line of each soaking stage of the coating, so as to obtain the area change rate, and further quickly evaluating the corrosion resistance of the coating.
Example 5
Soaking the steel plate 2 with the coating in artificial seawater for 360h respectively to form a coating on one surface of a glass steel plate, then installing the steel plate in an electrochemical device, connecting one surface of a stripped coating with an electrode of the electrochemical device, injecting a proper amount of artificial seawater into the electrochemical device by using a needle cylinder, connecting the electrochemical device, an electrochemical workstation and a computer, and putting the whole electrochemical device into a shielding box. The electrochemical workstation was started and was a princeton model 273A electrochemical workstation. Before testing, impedance testing parameters were set as follows:
direct current potential: 0 mV;
the amplitude of the alternating current is 10 mV;
frequency sweep range: 100k-0.01 HZ;
logarithmic scanning, and counting 10 points per decade of frequency;
and (4) carrying out constant potential polarization on the system, and measuring the EIS after the open circuit potential is stable to obtain an impedance spectrum. And (4) calculating the area under the Bode graph curve to obtain the area under the line of each soaking stage of the coating, so as to obtain the area change rate, and further quickly evaluating the corrosion resistance of the coating.
Example 6
Soaking the steel plate 3 with the coating in artificial seawater for 720h respectively to form a coating on one surface of a glass steel plate, then installing the steel plate in an electrochemical device, connecting one surface of a stripped coating with an electrode of the electrochemical device, injecting a proper amount of artificial seawater into the electrochemical device by using a needle cylinder, connecting the electrochemical device, an electrochemical workstation and a computer, and putting the whole electrochemical device into a shielding box. The electrochemical workstation was started and was a princeton model 273A electrochemical workstation. Before testing, impedance testing parameters were set as follows:
direct current potential: 0 mV;
the amplitude of the alternating current is 10 mV;
frequency sweep range: 100k-0.01 HZ;
logarithmic scanning, and counting 10 points per decade of frequency;
and (4) carrying out constant potential polarization on the system, and measuring the EIS after the open circuit potential is stable to obtain an impedance spectrum. And (4) calculating the area under the Bode graph curve to obtain the area under the line of each soaking stage of the coating, so as to obtain the area change rate, and further quickly evaluating the corrosion resistance of the coating.
Example 7
Soaking the steel plate 3 with the coating in artificial seawater for 24h respectively to form a coating on one surface of a glass steel plate, then installing the steel plate in an electrochemical device, connecting one surface of a stripped coating with an electrode of the electrochemical device, injecting a proper amount of artificial seawater into the electrochemical device by using a needle cylinder, connecting the electrochemical device, an electrochemical workstation and a computer, and putting the whole electrochemical device into a shielding box. The electrochemical workstation was started and was a princeton model 273A electrochemical workstation. Before testing, impedance testing parameters were set as follows:
direct current potential: 0 mV;
the amplitude of the alternating current is 10 mV;
frequency sweep range: 100k-0.01 HZ;
logarithmic scanning, and counting 10 points per decade of frequency;
and (4) carrying out constant potential polarization on the system, and measuring the EIS after the open circuit potential is stable to obtain an impedance spectrum. And (4) calculating the area under the Bode graph curve to obtain the area under the line of each soaking stage of the coating, so as to obtain the area change rate, and further quickly evaluating the corrosion resistance of the coating.
Example 8
Soaking the steel plate 3 with the coating in artificial seawater for 360h respectively to form a coating on one surface of a glass steel plate, then installing the steel plate in an electrochemical device, connecting one surface of a stripped coating with an electrode of the electrochemical device, injecting a proper amount of artificial seawater into the electrochemical device by using a needle cylinder, connecting the electrochemical device, an electrochemical workstation and a computer, and putting the whole electrochemical device into a shielding box. The electrochemical workstation was started and was a princeton model 273A electrochemical workstation. Before testing, impedance testing parameters were set as follows:
direct current potential: 0 mV;
the amplitude of the alternating current is 10 mV;
frequency sweep range: 100k-0.01 HZ;
logarithmic scanning, and counting 10 points per decade of frequency;
and (4) carrying out constant potential polarization on the system, and measuring the EIS after the open circuit potential is stable to obtain an impedance spectrum. And (4) calculating the area under the Bode graph curve to obtain the area under the line of each soaking stage of the coating, so as to obtain the area change rate, and further quickly evaluating the corrosion resistance of the coating.
Example 9
Soaking the steel plate 3 with the coating in artificial seawater for 720h respectively to form a coating on one surface of a glass steel plate, then installing the steel plate in an electrochemical device, connecting one surface of a stripped coating with an electrode of the electrochemical device, injecting a proper amount of artificial seawater into the electrochemical device by using a needle cylinder, connecting the electrochemical device, an electrochemical workstation and a computer, and putting the whole electrochemical device into a shielding box. The electrochemical workstation was started and was a princeton model 273A electrochemical workstation. Before testing, impedance testing parameters were set as follows:
direct current potential: 0 mV;
the amplitude of the alternating current is 10 mV;
frequency sweep range: 100k-0.01 HZ;
logarithmic scanning, and counting 10 points per decade of frequency;
and (4) carrying out constant potential polarization on the system, and measuring the EIS after the open circuit potential is stable to obtain an impedance spectrum. And (4) calculating the area under the Bode graph curve to obtain the area under the line of each soaking stage of the coating, so as to obtain the area change rate, and further quickly evaluating the corrosion resistance of the coating.
Comparative example 1
The difference from example 1 is that the steel sheet 1 was directly mounted without soaking and then subjected to electrochemical test.
Comparative example 2
The difference from example 4 is that the steel sheet 1 was directly mounted without soaking and then subjected to electrochemical test.
Comparative example 3
The difference from example 7 is that the steel sheet 1 was directly mounted without soaking and then subjected to electrochemical test.
The electrochemical devices of the above-mentioned examples 1 to 9 and comparative examples 1 to 3, which were detachably mounted, comprised an upper base 1, a lower base 2, a steel plate 3, a pressure-sealing plate 4, an electrochemical liquid tank 5, an SCE reference electrode 6 and a platinum sheet auxiliary electrode 7, the steel plate 3 is placed on the lower base 2, the pressure sealing plate 4 is placed above the steel plate 3, the middle of the pressure sealing plate 4 is provided with an opening, the electrochemical liquid groove 5 is arranged at the central position on the pressure sealing plate 4, is connected with a steel plate 3 through an opening in the middle of a pressure sealing plate 4, the upper base 1 covers the electrochemical liquid tank 5, a plurality of round holes are arranged on the upper base 1, the SCE reference electrode 6 and the platinum sheet auxiliary electrode 7 are put into the electrochemical liquid tank 5 through the round holes, the electrochemical liquid is injected into the electrochemical liquid tank 5 through a round hole, and the peripheries of the upper base 1 and the lower base 2 are fixedly connected through a fixing bolt 8.
In order to embody the beneficial effects of the present invention, the technical scheme of the present invention is subjected to an electrochemical test to obtain an impedance spectrum, as shown in fig. 2.
The area under the Bode plot is calculated by using Origin software interpolation method, and the calculation result is shown in the following table 1:
TABLE 1 area under Bode plot of impedance spectra of different samples
The area change rate was obtained by the following formula (1), and the calculation results are shown in the following table 2:
TABLE 2 percentage change in area under Bode plot (%) -of impedance spectra of different samples
As can be seen from tables 1 and 2, after the steel plates 1, 2 and 3 are soaked for 24 hours, the area under the Bode plot begins to decrease, indicating that the solution begins to penetrate into the coating surface; after the steel plate 2 and the steel plate 3 are soaked for 360 hours, the steel plate 2 and the steel plate 3 are changed greatly, the area is reduced more, the area reduced by the steel plate 1 is relatively smaller, and the water resistance and the corrosion resistance of a coating system of the steel plate 1 are better; after soaking for 720h, the areas under the Bode plots of the three steel plate samples all changed greatly, and the area reduced by the steel plate 3 is still the largest. It can also be seen from the impedance-frequency diagram and the phase angle-frequency diagram that after 720h of soaking, the steel plate 3 has almost failed, and the protective function of the coating is lost. After the steel plate 1 is soaked for 720 hours, the Bode diagram is obviously changed, but the resistance value is still very high compared with that of the steel plate 2 and the steel plate 3, and the protection function is still strong. As can be seen from fig. 2 and tables 1 and 2, the penetration resistance and corrosion resistance of steel sheet 2 are intermediate between those of steel sheets 1 and 3.
Therefore, the electrochemical experimental method provided by the invention can quickly evaluate the corrosion resistance of the coating by utilizing the impedance spectrum and the area change ratio under the Bode graph.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. An electrochemical experimental method for rapidly evaluating the corrosion resistance of a coating is characterized by comprising the following steps:
(1) soaking the steel plate with the coating in artificial seawater for 20-800h, and then stripping the coating on one surface of the steel plate;
(2) putting the steel plate processed in the step (1) into an electrochemical device, connecting the anode and the cathode of the electrochemical device to an external electrochemical workstation, and setting impedance test parameters of the electrochemical workstation, wherein the impedance test parameters are set as follows:
direct current potential: 0 mV;
the amplitude of the alternating current is 10 mV;
frequency sweep range: 100k-0.01 HZ;
logarithmic scanning, and counting 10 points per decade of frequency;
(3) carrying out constant potential polarization on the system, and measuring EIS after the open circuit potential is stable to obtain an impedance spectrum;
(4) and (4) calculating the area under the Bode graph curve to obtain the area under the line of each soaking stage of the coating, so as to obtain the area change rate, and further quickly evaluating the corrosion resistance of the coating.
2. The electrochemical experimental method for rapidly evaluating the corrosion resistance of the coating according to claim 1, wherein the electrochemical device is detachably mounted and comprises an upper base (1), a lower base (2), a steel plate (3), a sealing plate (4), an electrochemical liquid tank (5), an SCE reference electrode (6) and a platinum sheet auxiliary electrode (7), the steel plate (3) is placed on the lower base (2), the surface of the steel plate (3) is provided with the coating, the sealing plate (4) is placed above the steel plate, an opening is formed in the middle of the sealing plate (4), the electrochemical liquid tank (5) is placed in a central position above the sealing plate (4) and connected with the steel plate through the opening in the middle of the sealing plate (4), the upper base (1) covers the electrochemical liquid tank (5), and the upper base (1) is provided with a plurality of round holes, the SCE reference electrode (6) and the platinum sheet auxiliary electrode (7) are placed in the electrochemical liquid tank (5) through round holes, the electrochemical liquid is injected into the electrochemical liquid tank (5) through the round holes, and the periphery of the upper base (1) and the periphery of the lower base (2) are tightly and fixedly connected through fixing bolts (8).
3. An electrochemical experimental method for rapidly evaluating the corrosion resistance of a coating according to claim 2, wherein the electrochemical liquid in the electrochemical device is artificial seawater.
4. An electrochemical experimental method for rapidly evaluating the corrosion resistance of a coating according to claim 1, wherein the electrochemical device is placed in a shielding box to reduce the influence of external vibration on the experimental result.
5. The electrochemical experimental method for rapidly evaluating the corrosion resistance of the coating according to claim 1, wherein the calculation method of the area under the Bode graph curve is one or more of numerical interpolation method and simpson's law.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111257213A (en) * | 2020-02-14 | 2020-06-09 | 大连科迈尔防腐科技有限公司 | Device and method for in-situ monitoring of underwater anticorrosive coating of marine structure |
| CN114062006A (en) * | 2021-11-18 | 2022-02-18 | 上海市建筑科学研究院有限公司 | On-site sampling and electrochemical corrosion test method for concrete surface anticorrosive material |
| CN114137044A (en) * | 2021-11-11 | 2022-03-04 | 北京航空航天大学 | Electrochemical method for on-site monitoring of organic coating protective performance in seawater environment |
| CN116183684A (en) * | 2022-12-15 | 2023-05-30 | 中国人民解放军海军航空大学 | Evaluation method of novel corrosion inhibitor for airborne electronic and electrical equipment |
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2021
- 2021-03-01 CN CN202110223198.XA patent/CN112881275A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111257213A (en) * | 2020-02-14 | 2020-06-09 | 大连科迈尔防腐科技有限公司 | Device and method for in-situ monitoring of underwater anticorrosive coating of marine structure |
| CN111257213B (en) * | 2020-02-14 | 2023-05-23 | 大连科迈尔防腐科技有限公司 | Device and method for in-situ monitoring of underwater anti-corrosion coating of marine structure |
| CN114137044A (en) * | 2021-11-11 | 2022-03-04 | 北京航空航天大学 | Electrochemical method for on-site monitoring of organic coating protective performance in seawater environment |
| CN114137044B (en) * | 2021-11-11 | 2022-08-16 | 北京航空航天大学 | Electrochemical method for on-site monitoring of organic coating protective performance in seawater environment |
| CN114062006A (en) * | 2021-11-18 | 2022-02-18 | 上海市建筑科学研究院有限公司 | On-site sampling and electrochemical corrosion test method for concrete surface anticorrosive material |
| CN114062006B (en) * | 2021-11-18 | 2024-03-08 | 上海市建筑科学研究院有限公司 | On-site sampling and electrochemical corrosion test method for concrete surface anti-corrosion material |
| CN116183684A (en) * | 2022-12-15 | 2023-05-30 | 中国人民解放军海军航空大学 | Evaluation method of novel corrosion inhibitor for airborne electronic and electrical equipment |
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