CN107436283B - A method of detection metal pipe line outer wall corrosion - Google Patents
A method of detection metal pipe line outer wall corrosion Download PDFInfo
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- CN107436283B CN107436283B CN201610364256.XA CN201610364256A CN107436283B CN 107436283 B CN107436283 B CN 107436283B CN 201610364256 A CN201610364256 A CN 201610364256A CN 107436283 B CN107436283 B CN 107436283B
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- G01N17/02—Electrochemical measuring systems for weathering, corrosion or corrosion-protection measurement
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
A method of detection metal tube outer wall corrosion, device includes disc cover board, reference electrode column, auxiliary electrode and circular ring shape base, the center of disc cover board is provided with cover board mesoporous, in the outside of disc cover board roundel, screw thread is set, reference electrode column includes by reference electrode binding post, the top of connecting column and chlorination filamentary silver composition, with the lower part being made of fastening screwed pipe and glass tube, the connection column sleeve on top is in the outside of bottom glass pipe, chlorination filamentary silver in connecting column stretches to glass tube bottom end, the platinized platinum of auxiliary electrode is set to the lower section of the roundel of disc cover board, annular magnet is arranged in the inside of circular ring shape base, whole device is adsorbed on to the surface of Experiment Metal, this method operation is convenient, metal pipe line outer wall coating breakage can be judged rapidly under service state, damaged type and extent of corrosion.
Description
Technical field
The present invention relates to metal erosion measuring device more particularly to a kind of methods for detecting metal pipe line outer wall corrosion.
Background technique
There is investigation to show the whole world every year because accounting for state, various countries up to 600,000,000,000 to 1,200,000,000,000 yuan of economic loss caused by corroding
The 2%-4% of people's total output value.Especially for water conservancy or oil gas pipeline, the safety of pipeline has in operational process
Significance.The cause for influencing metal pipe line Years Of Service is known as very much, such as pipeline work pressure, Material Processing, third party breaks
The factors such as bad, metal erosion, coating breaks down will lead to the shortening of pipeline service life.Wherein, corrosion factor is on active service for pipeline
The influence degree of the time limit is the most serious.
Cause the environment of metal erosion multifarious, even same material, it corrodes under different corrosive environments
There is also differences for form.For the Service Environment of metal pipe line, the corrosion type of pipe line steel can be divided into homogeneous corrosion, spot corrosion, seam
The erosion corrosion of gap burn into and stress corrosion etc..During the military service of pipeline, corrosion product forms and can be deposited on pipe line steel
Surface influences the further corrosion process of pipe line steel.The corrosion mechanism of pipe line steel is ingredient and the structure institute by its corrosion product
It determines, incessantly in this way, the property of corrosion scales also determines the variation of corrosion rate.
Because of the seriousness of feed-line corrosion failure consequence and the complexity of its corrosion process, metal pipe line is being taken
Etch state during labour, which carries out easily detection and accurate evaluation, to be then particularly important.In Corrosion monitoring and evaluation side
Face, electrochemical method have unique advantage.To be detected and evaluation metal pipe line outer wall is generally covered with protective coating, is gold
Category/coating system.With the extension of active time, protective coating degradation failure, pipeline steel surface has corrosion product generation, at this moment
As metal/rusty scale/coating system.Metal erosion is mainly electrochemical corrosion under coating, and protective coating is in failure procedure, companion
With a series of electrochemical change.By detection electrochemical signals variation, metal erosion and coating protection performance can be obtained
The multidate information of variation realizes the quantitative and semi-quantitative assessment of corrosion resistance coating and pipe line steel corrosion process.Currently, the country is to gold
The appraisal procedure for belonging to pipeline corrosion resisting property is only limitted to the monitoring of deformation to pipeline, overcoating coating use state, or uses nothing
Damage flaw detection means carry out destroying position to the pipeline that breakage has occurred for outer wall and damaged degree is detected, in combination with pipeline surface shape
The parameters such as looks variation, make Indirect evaluation to the corrosion condition of metal pipe line entirety, can not be to metal pipe line under service state
Etch state carry out quantitative assessment.Based on electrochemical measurement principle, the etch state of metal pipe line outer wall is carried out online fast
Speed detection and evaluation and the electrochemical measurement test device and evaluation method that are suitable for various specifications metal pipe line outer wall, at home
It did not used.
Summary of the invention
The present invention overcomes the disadvantages of the prior art, provides a kind of method for detecting metal pipe line outer wall corrosion.
In order to solve the above-mentioned technical problem, the present invention is achieved by the following technical solutions:
A kind of test device for measuring metal tube outer wall corrosion includes disc cover board, reference electrode column, auxiliary electricity
Pole and circular ring shape base, specifically:
Disc cover board is made of two up big and down small disc-shaped structures, and the disk of top is big disk, the circle of lower section
Disk is roundel, the center of disc cover board is provided with cover board mesoporous, cover board mesoporous is divided into two sections hole, upper hole
Diameter be greater than the diameter of lower hole, be provided with screw thread in upper hole, connect for the fastening screwed pipe with reference electrode column, small
Screw thread is arranged in the outside of disk, for the connection with circular ring shape base；
In the above-mentioned technical solutions, wherein the roundlet disk diameter is the 1/3-1/2 of great circle disk diameter；
Reference electrode column includes the top being made of reference electrode binding post, connecting column and chlorination filamentary silver, and by fastening spiral shell
The lower part of pipe and glass tube composition；It is vertically arranged reference electrode connecting column in the upper planar central of connecting column, is hung down inside connecting column
Upper plane is directly provided with chlorination filamentary silver, the top of chlorination filamentary silver passes through the upper plane and reference electrode connecting column of mesoporous connecting column
Bottom end be connected；The lower end outside of fastening screwed pipe is provided with screw thread, for being connect with hole on the cover board of disc cover board,
Glass tube, glass tube upper opening, inner hollow, to fill agar and saturated potassium chloride solution is arranged in the inside for fastening screwed pipe
As salt bridge, porous ceramics is set in the lower end of glass tube, the connection column sleeve on top is in the outside of bottom glass pipe, connecting column
Chlorination filamentary silver stretch to glass tube bottom end；Top and lower part keep connecting, and composition reference electrode column is whole；
In the above-mentioned technical solutions, wherein distance of the chlorination filamentary silver bottom end apart from glass tube bottom end is 0.5-2cm；
In the above-mentioned technical solutions, the porous ceramics is cordierite, material of aluminum titanate, the filtering as buffer solution
Medium, porous ceramics with a thickness of 1-10mm；
Auxiliary electrode includes platinized platinum and auxiliary electrode binding post, and platinized platinum is set to the lower section of the roundel of disc cover board,
Area is identical as the area of roundel, and the center of platinized platinum is provided with circular hole, and reference electrode column glass tube passes through platinized platinum central circular hole,
And fastening nut is set, for platinized platinum to be fixed on to the roundel of disc cover board, auxiliary electrode binding post is vertically installed in
In disc cover board, horizontal distance of the auxiliary electrode binding post apart from the disc cover board center of circle is less than the radius of roundel, auxiliary
Electrode terminal runs through big disk and roundel, and lower end is connected with platinized platinum, and upper end a part is exposed to the great circle of disc cover board
The top of disk；
In the above-mentioned technical solutions, the auxiliary electrode binding post is exposed to the portion above the big disk of disc cover board
Point length accounts for the 1/3-1/2 of entire length；
In the above-mentioned technical solutions, the platinized platinum is Ag/AgCl electrode；
Circular ring shape base is alternating share, the area of the big disk of the periphery area of a circle size and disc cover board of annulus
Identical, the inner circumferential area of a circle size of annulus is identical as the area of the roundel of disc cover board, the inside setting of circular ring shape base
Screw thread, for connecting with the roundel of disc cover board, the thickness of circular ring shape base is greater than the thickness of the roundel of disc cover board
After degree, circular ring shape base and disc cover board are connected through a screw thread, groove, sea of this groove as filling infiltration buffer are formed
Continuous space, is detailed in subsequent experimental method；Annular magnet is arranged in the inside of circular ring shape base, for whole device to be adsorbed on reality
Metallic surface is tested, ring washer is set at the edge of circular ring shape base inner circle；
In the above-mentioned technical solutions, wherein the roundel height is the 1/3-1/2 of circular ring shape base height；
In the above-mentioned technical solutions, wherein the groove floor area is the area of platinized platinum, is highly circular ring shape base
Height subtract disc cover board roundel height difference；
In the above-mentioned technical solutions, wherein the annular magnet is set to the downward side of circular ring shape base；
When being tested using the above test device, follow the steps below:
Step 1: will filling is in glass tube to fill agar and saturated potassium chloride solution, as the salt bridge in reaction,
Step 2: by connection column sleeve on the outside of glass tube, so that chlorination filamentary silver is stretched to glass tube bottom end, by reference electrode column
It is whole, it is connect by screw thread with disc cover board, disc cover board is connect by screw thread with circular ring shape base,
Step 3: the adsorbent material of filling infiltration buffer solution into groove,
Step 4: whole device is fixed on test device surface by annular magnet, and keeps sealing, it is corresponding with groove
Test metal as working electrode, for platinized platinum as auxiliary electrode, working electrode is consistent with the area of auxiliary electrode, chlorination filamentary silver
As reference electrode,
Step 5: electrochemical workstation being connect on reference electrode binding post and auxiliary electrode binding post, can be surveyed
Examination.
In the above-mentioned technical solutions, wherein the adsorbent material is sponge.
Compared with prior art, it the beneficial effects of the present invention are: test device production is simple, is quick on the draw, convenient for taking
Band, it is convenient to operate；Evaluation method is simply accurate, and data resolvability is high, can judge rapidly metal tube under service state
Line outer wall coating breakage, damaged type, extent of corrosion, and it is suitable for the corrosion to various specifications metal pipe line outer wall coating
State is used for quickly detecting and evaluates.
Detailed description of the invention
Fig. 1 is this test device reference electrode column and disc cover board connection structure schematic diagram.
Fig. 2 is reference electrode column side structure schematic view.
Fig. 3 is disc cover board side structure schematic view.
Fig. 4 is disc cover board bottom plane structure schematic diagram.
Fig. 5 is circular ring shape base structural schematic diagram.
Fig. 6 is circular ring shape base side structure schematic view.
Fig. 7 is circular ring shape base bottom plane structure schematic diagram.
Fig. 8 is the electrochemistry resistance that surface layer is impregnated in simulated seawater the 10-50 days coated with the X65 pipe line steel of epoxy resin
Anti- spectrum.
Fig. 9 is the erosion profile that surface layer is impregnated in simulated seawater the 10th day coated with the X65 pipe line steel of epoxy resin.
Figure 10 is the erosion profile that surface layer is impregnated in simulated seawater the 20th day coated with the X65 pipe line steel of epoxy resin.
Figure 11 is the electrification that surface layer is impregnated in simulated seawater the 140-200 days coated with the X65 pipe line steel of epoxy resin
Learn impedance spectrum.
Figure 12 is the erosion profile that surface layer is impregnated in simulated seawater the 140th day coated with the X65 pipe line steel of epoxy resin.
Figure 13 is the erosion profile that surface layer is impregnated in simulated seawater the 200th day coated with the X65 pipe line steel of epoxy resin.
Figure 14 is this test device overall structure diagram.
Wherein 1 is reference electrode binding post, and 2 be chlorination filamentary silver, and 3 be auxiliary electrode terminal, and 4 be glass tube, and 5 be fastening
Screwed pipe, 6 be disc cover board, and 7 be circular ring shape base, and 8 be annular magnet, and 9 be platinized platinum, and 10 be fastening nut, and 11 be air ring
Circle, 12 be porous ceramics, and 13 be cover board mesoporous, and 14 be roundel, and 15 be big disk, and 16 be upper hole, and 17 be lower hole, and 18 are
Connecting column, 19 be groove.
Specific embodiment
Present invention is further described in detail with specific embodiment with reference to the accompanying drawing:
A kind of test device for measuring metal tube outer wall corrosion includes disc cover board, reference electrode column, auxiliary electricity
Pole and circular ring shape base, specifically:
Disc cover board is made of two up big and down small disc-shaped structures, and the disk of top is big disk, the circle of lower section
Disk is roundel, the center of disc cover board is provided with cover board mesoporous, cover board mesoporous is divided into two sections hole, upper hole
Diameter be greater than the diameter of lower hole, be provided with screw thread in upper hole, connect for the fastening screwed pipe with reference electrode column, small
Screw thread is arranged in the outside of disk, for the connection with circular ring shape base；
In the above-mentioned technical solutions, wherein the roundlet disk diameter is the 1/3-1/2 of great circle disk diameter；
Reference electrode column includes the top being made of reference electrode binding post, connecting column and chlorination filamentary silver, and by fastening spiral shell
The lower part of pipe and glass tube composition；It is vertically arranged reference electrode connecting column in the upper planar central of connecting column, is hung down inside connecting column
Upper plane is directly provided with chlorination filamentary silver, the top of chlorination filamentary silver passes through the upper plane and reference electrode connecting column of mesoporous connecting column
Bottom end be connected；The lower end outside of fastening screwed pipe is provided with screw thread, for being connect with hole on the cover board of disc cover board,
Glass tube, glass tube upper opening, inner hollow, to fill agar and saturated potassium chloride solution is arranged in the inside for fastening screwed pipe
As salt bridge, porous ceramics is set in the lower end of glass tube, the connection column sleeve on top is in the outside of bottom glass pipe, connecting column
Chlorination filamentary silver stretch to glass tube bottom end；Top and lower part keep connecting, and composition reference electrode column is whole；
In the above-mentioned technical solutions, wherein distance of the chlorination filamentary silver bottom end apart from glass tube bottom end is 0.5-2cm；
In the above-mentioned technical solutions, the porous ceramics is cordierite, material of aluminum titanate, the filtering as buffer solution
Medium, porous ceramics with a thickness of 1-10mm；
Auxiliary electrode includes platinized platinum and auxiliary electrode binding post, and platinized platinum is set to the lower section of the roundel of disc cover board,
Area is identical as the area of roundel, and the center of platinized platinum is provided with circular hole, and reference electrode column glass tube passes through platinized platinum central circular hole,
And fastening nut is set, for platinized platinum to be fixed on to the roundel of disc cover board, auxiliary electrode binding post is vertically installed in
In disc cover board, horizontal distance of the auxiliary electrode binding post apart from the disc cover board center of circle is less than the radius of roundel, auxiliary
Electrode terminal runs through big disk and roundel, and lower end is connected with platinized platinum, and upper end a part is exposed to the great circle of disc cover board
The top of disk；
In the above-mentioned technical solutions, the auxiliary electrode binding post is exposed to the portion above the big disk of disc cover board
Point length accounts for the 1/3-1/2 of entire length；
In the above-mentioned technical solutions, the platinized platinum is Ag/AgCl electrode；
Circular ring shape base is alternating share, the area of the big disk of the periphery area of a circle size and disc cover board of annulus
Identical, the inner circumferential area of a circle size of annulus is identical as the area of the roundel of disc cover board, the inside setting of circular ring shape base
Screw thread, for connecting with the roundel of disc cover board, the thickness of circular ring shape base is greater than the thickness of the roundel of disc cover board
After degree, circular ring shape base and disc cover board are connected through a screw thread, groove, sea of this groove as filling infiltration buffer are formed
Continuous space, is detailed in subsequent experimental method；Annular magnet is arranged in the inside of circular ring shape base, for whole device to be adsorbed on reality
Metallic surface is tested, ring washer is set at the edge of circular ring shape base inner circle；
In the above-mentioned technical solutions, wherein the roundel height is the 1/3-1/2 of circular ring shape base height；
In the above-mentioned technical solutions, wherein the groove floor area is the area of platinized platinum, is highly circular ring shape base
Height subtract disc cover board roundel height difference；
In the above-mentioned technical solutions, wherein the annular magnet is set to the downward side of circular ring shape base；
When being tested using the above test device, follow the steps below:
Step 1: will filling is in glass tube to fill agar and saturated potassium chloride solution, as the salt bridge in reaction,
Step 2: by connection column sleeve on the outside of glass tube, so that chlorination filamentary silver is stretched to glass tube bottom end, by reference electrode column
It is whole, it is connect by screw thread with disc cover board, disc cover board is connect by screw thread with circular ring shape base,
Step 3: the adsorbent material of filling infiltration buffer solution into groove,
Step 4: whole device is fixed on test device surface by annular magnet, and keeps sealing, it is corresponding with groove
Test metal as working electrode, for platinized platinum as auxiliary electrode, working electrode is consistent with the area of auxiliary electrode, chlorination filamentary silver
As reference electrode,
Step 5: electrochemical workstation being connect on reference electrode binding post and auxiliary electrode binding post, can be surveyed
Examination.
In the above-mentioned technical solutions, wherein the adsorbent material is sponge.
It since circular ring shape base is embedded with one block of annular magnet, be fixed on test device can under the action of strong magnet
Above metal pipe line, it is suitable for various specifications metal pipe line.Reference electrode is AgCl electrode, and stability is high, applicability is wide；Auxiliary
Electrode is the platinized platinum of diameter 30mm, and auxiliary electrode area is exposed to the basic phase of the work area in solution environmental with working electrode
Together, guarantee the accuracy of test data when in use can according to experiment needs, adjust the height of roundel so that groove depth
Degree changes.Detection tests metal pipe line outer wall using electrochemical impedance spectral technology, and test method is simple, data acquisition is fast
Speed, by analyzing data, it can be determined that the etch state of metal pipe line outer wall and the integrality of coating and damaged degree.
Embodiment 1:
Electrochemical impedance test, test are carried out using AutoLab 302N electrochemical workstation and the test device developed
Sample is X65 pipe line steel, and sample outer wall uniformly coats epoxy coating, and test solution is 3.5wt% concentration aqueous sodium chloride
Liquid (simulated seawater), sponge fill in test device bottom after being filled test solution, and 25 DEG C of test temperature, test period is 50 days,
As a result as shown in Figure 8.
Soaking time was until the 10th day, and measured impedance complex number plane figure is still in the shape of single semi arch, by holding
The radius of anti-arc can be inferred that surveyed inner wall surface coating resistance with higher (50M Ω * cm2), show its corrosion resistance
Well.For the accuracy of further validating experiment data, sample is placed under the full depth-of-field microscope of Keyemce VHX-2000
Amplifying observation, discovery coating surface is completely smooth, does not have disrepair phenomenon, as shown in Figure 9.
When soaking time reaches 20 days, measured impedance complex number plane figure starts that the feature of the anti-arc of double volume is presented, and
The radius of capacitive reactance arc is obviously reduced.Illustrate there is part solution can arrive metal base surface, coating through coating penetration
Corrosion resistant protective can gradually fail.For the accuracy of further validating experiment data, sample is placed in Keyemce
It is magnified under the full depth-of-field microscope of VHX-2000, discovery coating surface has the breakage of small area, and regional area metallic matrix is
It is exposed through, sees Figure 10.
Embodiment 2:
Electrochemical impedance test, test are carried out using AutoLab 302N electrochemical workstation and the test device developed
Sample is X65 pipe line steel, and sample outer wall uniformly coats epoxy coating, and test solution is 3.5wt% concentration aqueous sodium chloride
Liquid (simulated seawater), sponge fill in test device bottom after being filled test solution, and 25 DEG C of test temperature, the testing time is respectively to soak
The 140th day and the 200th day are steeped, as a result as shown in figure 11.
When impregnating the 200th day, measured impedance complex number plane figure starts to be presented three of the anti-arc+diffusion impedance of double volume
Time constant feature, capacitive reactance arc radius reduce obvious (30K Ω * cm2) compared with impregnating early period, illustrate that solution has been transmitted through coating
It reaches metal base surface and corrodes, the corrosion resistant protective of coating can be no longer valid.For further validating experiment data
Accuracy, sample is placed in the full depth-of-field microscope of Keyemce VHX-2000 and is magnified, there are larger for discovery coating surface
Serious breakage occurs for the bronzing corrosion product of area, coating.Figure 12, Figure 13 are respectively after impregnating the 140th day and the 200th day
Specimen surface pattern.
It describes the invention in detail, but content is only the preferred embodiment of the present invention, cannot be recognized above
For for limiting practical range of the invention.Any changes and modifications in accordance with the scope of the present application should all still return
Belong within patent covering scope of the invention.
Claims (7)
1. a kind of method for detecting metal pipe line outer wall corrosion, which is characterized in that follow the steps below test:
Step 1: will fill in the glass tube of test device to fill agar and saturated potassium chloride solution, as the salt in reaction
Bridge,
Step 2: by connection column sleeve on the outside of glass tube, chlorination filamentary silver is made to stretch to glass tube bottom end, reference electrode column is whole,
It is connect by screw thread with disc cover board, disc cover board is connect by screw thread with circular ring shape base,
Step 3: the adsorbent material of filling infiltration buffer solution into groove,
Step 4: test device is fixed on metal pipe line outer wall surface by annular magnet, and keeps sealing, it is corresponding with groove
Test metal as working electrode, for platinized platinum as auxiliary electrode, working electrode is consistent with the area of auxiliary electrode, chlorination filamentary silver
As reference electrode,
Step 5: electrochemical workstation being connect on reference electrode binding post and auxiliary electrode binding post, is tested；
The test device includes disc cover board, reference electrode column, auxiliary electrode and circular ring shape base:
Disc cover board is made of two up big and down small disc-shaped structures, and the disk of top is big disk, and the disk of lower section is
Roundel is provided with cover board mesoporous in the center of disc cover board, and cover board mesoporous is divided into two sections hole, upper hole it is straight
Diameter is greater than the diameter of lower hole, is provided with screw thread in upper hole, connect for the fastening screwed pipe with reference electrode column, in roundel
Outside be arranged screw thread, for the connection with circular ring shape base；
Reference electrode column includes the top of connecting column and chlorination filamentary silver composition by reference electrode binding post, and by fastening screwed pipe and
The lower part of glass tube composition；Be vertically arranged reference electrode connecting column in the upper planar central of connecting column, connecting column internal vertical in
Upper plane is provided with chlorination filamentary silver, and the top of chlorination filamentary silver passes through the upper plane of mesoporous connecting column and the bottom of reference electrode connecting column
End is connected；The lower end outside of fastening screwed pipe is provided with screw thread, for being connect with hole on the cover board of disc cover board, is fastening
Glass tube, glass tube upper opening, inner hollow, to fill agar and saturated potassium chloride solution conduct is arranged in the inside of screwed pipe
Porous ceramics, chlorine of the connection column sleeve on top in the outside of bottom glass pipe, connecting column is arranged in the lower end of glass tube in salt bridge
Change filamentary silver and stretches to glass tube bottom end；Top and lower part keep connecting, and composition reference electrode column is whole；
Auxiliary electrode includes platinized platinum and auxiliary electrode binding post, and platinized platinum is set to the lower section of the roundel of disc cover board, area
Identical as the area of roundel, the center of platinized platinum is provided with circular hole, and reference electrode column glass tube passes through platinized platinum central circular hole, and sets
Fastening nut is set, for platinized platinum to be fixed on to the roundel of disc cover board, auxiliary electrode binding post is vertically installed in disk
In shape cover board, horizontal distance of the auxiliary electrode binding post apart from the disc cover board center of circle is less than the radius of roundel, auxiliary electrode
Binding post runs through big disk and roundel, and lower end is connected with platinized platinum, and upper end a part is exposed to the big disk of disc cover board
Top；
Circular ring shape base is alternating share, the periphery area of a circle size and the area phase of the big disk of disc cover board of annulus
Together, the inner circumferential area of a circle size of annulus is identical as the area of the roundel of disc cover board, and spiral shell is arranged in the inside of circular ring shape base
Line, for connecting with the roundel of disc cover board, the thickness of circular ring shape base is greater than the thickness of the roundel of disc cover board,
After circular ring shape base and disc cover board are connected through a screw thread, groove is formed；Annular magnet is arranged in the inside of circular ring shape base, uses
In the surface that whole device is adsorbed on to Experiment Metal, ring washer is set at the edge of circular ring shape base inner circle；The suction
Enclosure material is sponge.
2. a kind of method for detecting metal pipe line outer wall corrosion as described in claim 1, it is characterised in that: the roundel
Diameter is the 1/3-1/2 of great circle disk diameter.
3. a kind of method for detecting metal pipe line outer wall corrosion as described in claim 1, it is characterised in that: the silver chlorate
Distance of the silk bottom end apart from glass tube bottom end is 0.5-2cm.
4. a kind of method for detecting metal pipe line outer wall corrosion as described in claim 1, it is characterised in that: the porous pottery
Porcelain is cordierite, material of aluminum titanate, as the filter medium of buffer solution, porous ceramics with a thickness of 1-10mm.
5. a kind of method for detecting metal pipe line outer wall corrosion as described in claim 1, it is characterised in that: the auxiliary electricity
The partial-length that pole binding post is exposed to above the big disk of disc cover board accounts for the 1/3-1/2 of entire length.
6. a kind of method for detecting metal pipe line outer wall corrosion as described in claim 1, it is characterised in that: the roundel
Height is the 1/3-1/2 of circular ring shape base height.
7. a kind of method for detecting metal pipe line outer wall corrosion as described in claim 1, it is characterised in that: the groove-bottom
Face area be the area of platinized platinum, be highly the height that the height of circular ring shape base subtracts the roundel of disc cover board difference.
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| CN105891097B (en) * | 2016-05-26 | 2019-04-23 | 天津大学 | It is a kind of for measuring the sensor of metal tube outer wall corrosion |
| CN108226027B (en) * | 2017-12-13 | 2020-12-29 | 中国特种飞行器研究所 | Coating aging failure evaluation method under atmosphere thin liquid film environment |
| CN114264591B (en) * | 2021-12-23 | 2023-05-12 | 中国兵器工业第五九研究所 | Device and method for evaluating corrosion appearance of metal standard part |
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| CN105891097B (en) * | 2016-05-26 | 2019-04-23 | 天津大学 | It is a kind of for measuring the sensor of metal tube outer wall corrosion |
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| CN2453440Y (en) * | 2000-12-15 | 2001-10-10 | 中国科学院南京土壤研究所 | High temp. reference electrode |
| WO2009072879A1 (en) * | 2007-12-06 | 2009-06-11 | Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno | Electrochemical cell for eis |
| CN202351159U (en) * | 2011-10-26 | 2012-07-25 | 中国船舶重工集团公司第七二五研究所 | Testing pool device for field monitoring of corrosion resistance of ship body coating |
| CN102706930A (en) * | 2012-05-28 | 2012-10-03 | 天津大学 | Sensor for metallic corrosion detection in different environments |
| CN202814854U (en) * | 2012-05-29 | 2013-03-20 | 奥瑞金包装股份有限公司 | Electrolytic tank for detecting corrosion resistance of packaging material |
| CN204758463U (en) * | 2015-06-30 | 2015-11-11 | 天津大学 | A half solid -state reference electrode for metal soil corrosion electrochemistry system |
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