CN110018209A - The method of the lower metal surface pH value measurement of dirt - Google Patents
The method of the lower metal surface pH value measurement of dirt Download PDFInfo
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- CN110018209A CN110018209A CN201810019245.7A CN201810019245A CN110018209A CN 110018209 A CN110018209 A CN 110018209A CN 201810019245 A CN201810019245 A CN 201810019245A CN 110018209 A CN110018209 A CN 110018209A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/28—Electrolytic cell components
- G01N27/30—Electrodes, e.g. test electrodes; Half-cells
- G01N27/302—Electrodes, e.g. test electrodes; Half-cells pH sensitive, e.g. quinhydron, antimony or hydrogen electrodes
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Abstract
The present invention relates to a kind of methods of the lower metal surface pH value measurement of dirt, mainly solve the problems, such as directly measure metal surface pH value under dirt in the prior art.The method that the present invention is measured by using a kind of lower metal surface pH value of dirt, the measurement of the lower metal surface pH value of dirt is carried out using pH measuring device, described device includes tack pH electrode, sealing ring, hollow posts, metal mesh and hollow fixator, sealing ring is installed on tack pH electrode, by the elastic of sealing ring and it is frictionally secured in hollow posts, tack pH electrode is put into hollow posts, tack is upward, metal mesh is placed on the step on hollow posts top, it is then placed in sealing ring C, by sealing ring C, metal mesh is fixed in hollow fixator and hollow posts；It by the inner thread mouth of the external screw thread precession experiment container lower part of hollow posts lower part, realizes that the sealing of experiment container mouth and the technical solution of the fixation of hollow posts preferably solve the above problem, can be used under dirt in the measurement of metal surface pH value.
Description
Technical field
The present invention relates to a kind of methods of the lower metal surface pH value measurement of dirt.
Background technique
Deposition due to corrosion product, elementary sulfur and silt etc. on the surfaces such as pipe-line inner wall and tank bottom can
Lead to underdeposit corrosion, bacterium may also form microbial film in pipeline, the surfaces such as storage tank and device.Bacterial membrane or microbial film warp
Often and corrosion product, the co-deposition such as elementary sulfur and silt are often referred to collectively as dirty layer in metal surface.Under certain conditions,
No matter live corrosion coupon and the indoor simulation underdeposit corrosion measured and the uniform corrosion rate of bacterial corrosion it is lower, but go out
Now serious pitting corrosion.Under dirt is lower and microbial film the pH value of corrosion environment and the pH value of solution bulk there may be
It is not both the reason of leading to the above corrosion phenomenon.
The pH electrode of business is mainly used for measuring the pH value of solution bulk or mud at present, cannot directly measure metal under dirt
Surface pH value, the glass head of electrode are blistered or flat.
This patent forms corrosion products film or micro- in metal mesh corrosion process by installing tack pH electrode under metal mesh
The dirt layer such as biomembrane, tack pH electrode can measure the lower pH value of dirt, will be seen that metal watch under dirty layer by this device and method
The pH value in face is conducive to analyze corrosion phenomenon and mechanism to analyse in depth the corrosive environment of metal surface.
Summary of the invention
The technical problem to be solved by the present invention is to cannot directly measure asking for metal surface pH value under dirt in the prior art
Topic provides a kind of method that metal surface pH value measures under new dirt, and the excellent of metal surface pH value under dirt can directly be measured by having
Point.
To solve the above problems, The technical solution adopted by the invention is as follows: a kind of side of the lower metal surface pH value measurement of dirt
Method, carries out the measurement of the lower metal surface pH value of dirt using pH measuring device, described device include tack pH electrode, sealing ring, in
Void column, metal mesh and hollow fixator, on tack pH electrode install sealing ring A, sealing ring B, by sealing ring elasticity and
It is frictionally secured in hollow posts, tack pH electrode is put into hollow posts, upward, metal mesh is placed in hollow posts top to tack
On step, it is then placed in sealing ring C, by sealing ring C, metal mesh is fixed in hollow fixator and hollow posts；It will be hollow
The inner thread mouth of the external screw thread precession experiment container lower part of column lower part realizes the sealing of experiment container mouth and the fixation of hollow posts；
When measuring, include the following steps: that (1) installs sealing ring A, sealing ring B isolation air on tack pH electrode and experiment is molten
Liquid, at the same by sealing ring A, sealing ring B elasticity and be frictionally secured in hollow posts；(2) tack pH electrode is put into hollow
In column, metal mesh is put on the step on hollow posts top, is then placed in sealing ring C, by sealing ring C, hollow fixator and
Metal mesh is fixed in hollow posts；(4) by the inner thread mouth of hollow posts precession experiment container lower part, experiment container mouth is realized
The fixation of sealing and hollow posts；(5) experimental solutions are added into experiment container, use metal surface under tack pH electrode measurement dirt
PH value.
In above-mentioned technical proposal, it is preferable that metal mesh be cut into circle or with the matched other shapes of hollow posts.
In above-mentioned technical proposal, it is preferable that hollow fixator has external screw thread, and the step above section of hollow posts is with interior
Screw thread.
In above-mentioned technical proposal, it is preferable that the material of metal mesh is identical with the material of metal as test.
In above-mentioned technical proposal, it is preferable that hollow fixator is hollow structure, and experimental solutions can be to contact metal mesh.
In above-mentioned technical proposal, it is preferable that be wrapped with polytetrafluoro band, precession experiment container at the external screw thread of hollow posts lower part
The inner thread mouth of lower part.
In above-mentioned technical proposal, it is preferable that needed to add dirty layer on metal mesh according to experiment.
In above-mentioned technical proposal, it is preferable that experimental solutions are added into experiment container, tack pH electrode, which is capable of measuring, tested
Corrosion products film, microbial film and the dirty layer added by outer add mode in metal mesh that journey is formed on metal mesh.
The pH electrode of business is mainly used for measuring the pH value of solution bulk or mud at present, cannot directly measure metal under dirt
Surface pH value, the glass head of electrode are blistered or flat.Under dirt is lower and microbial film the pH value of corrosion environment and
There may be differences for the pH value of solution bulk.This patent under metal mesh by installing tack pH electrode, metal mesh corrosion process
The dirt layer such as middle formation corrosion products film or microbial film, tack pH electrode can measure the lower pH value of dirt, pass through this device and method
It will be seen that it is existing to be conducive to analysis corrosion to analyse in depth the corrosive environment of metal surface for the pH value of metal surface under dirty layer
As and mechanism, achieve preferable technical effect.
Detailed description of the invention
Fig. 1 is the schematic diagram of the method for the invention.
In Fig. 1,1 experiment container, 2 experiment container mouths, 3 tack pH electrodes, 4 sealing ring A, 5 hollow posts, 6 sealing ring B, 7 gold medals
Belong to net, 8 sealing ring C, 9 hollow fixators.
The present invention will be further described below by way of examples, but is not limited only to the present embodiment.
Specific embodiment
[embodiment 1]
A kind of method of the lower metal surface pH value measurement of dirt, as shown in Figure 1, carrying out the lower metal watch of dirt using pH measuring device
The measurement of face pH value, described device includes tack pH electrode, sealing ring, hollow posts, metal mesh and hollow fixator, in tack pH
Sealing ring A, sealing ring B are installed on electrode, by the elastic of sealing ring and is frictionally secured in hollow posts, tack pH electrode is put
Enter in hollow posts, upward, metal mesh is placed on the step on hollow posts top tack, is then placed in sealing ring C, is passed through sealing ring
Metal mesh is fixed in C, hollow fixator and hollow posts；It will be in the external screw thread precession experiment container lower part of hollow posts lower part
Screw thread mouth realizes the sealing of experiment container mouth and the fixation of hollow posts.
Metal mesh be cut into circle or with the matched other shapes of hollow posts.Hollow fixator has external screw thread, hollow posts
Step above section has internal screw thread.The material of metal mesh is identical with the material of metal as test.Hollow fixator is hollow knot
Structure, experimental solutions can contact metal mesh.It is needed to add dirty layer on metal mesh 7 according to experiment.It is added into experiment container real
Test solution, tack pH electrode is capable of measuring the corrosion products film that experimentation formed on metal mesh, microbial film and by outer
The dirt layer such as elementary sulfur, silt that add mode is added in metal mesh.
Even if metal surface does not have visible film, metal surface pH value and solution bulk pH value are also likely to be present difference.
When measuring, include the following steps: (1) mounting O-shaped sealing ring A and B, O-shaped sealing on tack pH electrode 3
Circle A and B completely cuts off air and experimental solutions respectively, while by the elasticity of O-ring seal and being frictionally secured in hollow posts 5；(2)
Tack pH electrode 3 is put into hollow posts 5, tack upward, by experiment metal mesh 7 be cut into circle or with hollow posts 5 it is matched
Other shapes are put on the step on 5 top of hollow posts, are then placed in O-ring seal C, and hollow fixator 9 has external screw thread, in
The step above section of void column 5 has internal screw thread.The material of metal mesh 7 is identical with the material of metal as test.(3) by O-shaped
Metal mesh 7 is fixed in sealing ring C, hollow fixator 9 and hollow posts 5.Hollow fixator 9 is hollow structure, therefore is tested
Solution can contact metal mesh 7.(4) polytetrafluoro band, 1 lower part of precession experiment container are wrapped at the external screw thread of 5 lower part of hollow posts
Inner thread mouth 2, the sealing of experiment container mouth 2 and the fixation of hollow posts 5 may be implemented.(5) experiment is added into experiment container 1
Solution, if experiment needs to add dirty layer on metal mesh 7.Either experimentation is formed on contact metal mesh 7
Corrosion products film, the dirty layer such as elementary sulfur, silt that microbial film is still added by outer add mode in contact metal mesh 7, tack
PH electrode 3 can measure the pH value of metal surface under dirt.
[embodiment 2]
A kind of method of the lower metal surface pH value measurement of dirt, as shown in Figure 1, carrying out the lower metal watch of dirt using pH measuring device
The measurement of face pH value, described device includes tack pH electrode, sealing ring, hollow posts, metal mesh and hollow fixator, in tack pH
Sealing ring A, sealing ring B are installed on electrode, by the elastic of sealing ring and is frictionally secured in hollow posts, tack pH electrode is put
Enter in hollow posts, upward, metal mesh is placed on the step on hollow posts top tack, is then placed in sealing ring C, is passed through sealing ring
Metal mesh is fixed in C, hollow fixator and hollow posts；It will be in the external screw thread precession experiment container lower part of hollow posts lower part
Screw thread mouth realizes the sealing of experiment container mouth and the fixation of hollow posts.
Metal mesh be cut into circle or with the matched other shapes of hollow posts.Hollow fixator has external screw thread, hollow posts
Step above section has internal screw thread.Hollow fixator is hollow structure, and experimental solutions can contact metal mesh.According to experiment need
Dirty layer is added on metal mesh 7.Experimental solutions are added into experiment container, tack pH electrode is capable of measuring experimentation in metal
Corrosion products film, microbial film and the elementary sulfur dirt layer added by outer add mode in metal mesh formed on the net.
Even if metal surface does not have visible film, metal surface pH value and solution bulk pH value are also likely to be present difference.
When measuring, include the following steps: (1) mounting O-shaped sealing ring A and B, O-shaped sealing on tack pH electrode 3
Circle A and B completely cuts off air and experimental solutions respectively, while by the elasticity of O-ring seal and being frictionally secured in hollow posts 5；(2)
Tack pH electrode 3 is put into hollow posts 5, tack upward, by experiment metal mesh 7 be cut into circle or with hollow posts 5 it is matched
Other shapes are put on the step on 5 top of hollow posts, are then placed in O-ring seal C, and hollow fixator 9 has external screw thread, in
The step above section of void column 5 has internal screw thread.The material of metal mesh 7 is identical with the material of metal as test.(3) by O-shaped
Metal mesh 7 is fixed in sealing ring C, hollow fixator 9 and hollow posts 5.Hollow fixator 9 is hollow structure, therefore is tested
Solution can contact metal mesh 7.(4) polytetrafluoro band, 1 lower part of precession experiment container are wrapped at the external screw thread of 5 lower part of hollow posts
Inner thread mouth 2, the sealing of experiment container mouth 2 and the fixation of hollow posts 5 may be implemented.(5) experiment is added into experiment container 1
Solution, if experiment needs to add dirty layer on metal mesh 7.Either experimentation is formed on contact metal mesh 7
Corrosion products film, the dirty layer such as elementary sulfur, silt that microbial film is still added by outer add mode in contact metal mesh 7, tack
PH electrode 3 can measure the pH value of metal surface under dirt.
[embodiment 3]
A kind of method of the lower metal surface pH value measurement of dirt, as shown in Figure 1, carrying out the lower metal watch of dirt using pH measuring device
The measurement of face pH value, described device includes tack pH electrode, sealing ring, hollow posts, metal mesh and hollow fixator, in tack pH
Sealing ring A, sealing ring B are installed on electrode, by the elastic of sealing ring and is frictionally secured in hollow posts, tack pH electrode is put
Enter in hollow posts, upward, metal mesh is placed on the step on hollow posts top tack, is then placed in sealing ring C, is passed through sealing ring
Metal mesh is fixed in C, hollow fixator and hollow posts；It will be in the external screw thread precession experiment container lower part of hollow posts lower part
Screw thread mouth realizes the sealing of experiment container mouth and the fixation of hollow posts.
Metal mesh be cut into circle or with the matched other shapes of hollow posts.Hollow fixator has external screw thread, hollow posts
Step above section has internal screw thread.The material of metal mesh is identical with the material of metal as test.Hollow fixator is hollow knot
Structure, experimental solutions can contact metal mesh.It is needed to add dirty layer on metal mesh 7 according to experiment.It is added into experiment container real
Test solution, tack pH electrode is capable of measuring the corrosion products film that experimentation formed on metal mesh, microbial film and by outer
The silt dirt layer that add mode is added in metal mesh.
Even if metal surface does not have visible film, metal surface pH value and solution bulk pH value are also likely to be present difference.
When measuring, include the following steps: (1) mounting O-shaped sealing ring A and B, O-shaped sealing on tack pH electrode 3
Circle A and B completely cuts off air and experimental solutions respectively, while by the elasticity of O-ring seal and being frictionally secured in hollow posts 5；(2)
Tack pH electrode 3 is put into hollow posts 5, tack upward, by experiment metal mesh 7 be cut into circle or with hollow posts 5 it is matched
Other shapes are put on the step on 5 top of hollow posts, are then placed in O-ring seal C, and hollow fixator 9 has external screw thread, in
The step above section of void column 5 has internal screw thread.The material of metal mesh 7 is identical with the material of metal as test.(3) by O-shaped
Metal mesh 7 is fixed in sealing ring C, hollow fixator 9 and hollow posts 5.Hollow fixator 9 is hollow structure, therefore is tested
Solution can contact metal mesh 7.(4) polytetrafluoro band, 1 lower part of precession experiment container are wrapped at the external screw thread of 5 lower part of hollow posts
Inner thread mouth 2, the sealing of experiment container mouth 2 and the fixation of hollow posts 5 may be implemented.(5) experiment is added into experiment container 1
Solution, if experiment needs to add dirty layer on metal mesh 7.Either experimentation is formed on contact metal mesh 7
Corrosion products film, the dirty layer such as elementary sulfur, silt that microbial film is still added by outer add mode in contact metal mesh 7, tack
PH electrode 3 can measure the pH value of metal surface under dirt.
Obviously, this patent forms corrosion product in metal mesh corrosion process by installing tack pH electrode under metal mesh
The dirt layer such as film or microbial film, tack pH electrode can measure the lower pH value of dirt, will be seen that under dirty layer by this device and method
The pH value of metal surface is conducive to analyze corrosion phenomenon and mechanism, achieve to analyse in depth the corrosive environment of metal surface
Preferable technical effect.The device and method of this patent can be also used for metal surface and have no gold in the case of visible film (such as moisture film)
The pH value of metal surface measures.
Claims (8)
1. a kind of method of the lower metal surface pH value measurement of dirt, the survey of the lower metal surface pH value of dirt is carried out using pH measuring device
Amount, described device includes tack pH electrode, sealing ring, hollow posts, metal mesh and hollow fixator, is installed on tack pH electrode
Sealing ring A, sealing ring B by the elastic of sealing ring and are frictionally secured in hollow posts, tack pH electrode are put into hollow posts
Interior, upward, metal mesh is placed on the step on hollow posts top tack, is then placed in sealing ring C, hollow solid by sealing ring C
Determine device and metal mesh is fixed in hollow posts；By the inner thread mouth of the external screw thread precession experiment container lower part of hollow posts lower part,
Realize the sealing of experiment container mouth and the fixation of hollow posts；When measuring, include the following steps: (1) on tack pH electrode
Sealing ring A, sealing ring B isolation air and experimental solutions is installed, at the same by sealing ring A, sealing ring B elasticity and frictionally secure
In hollow posts；(2) tack pH electrode is put into hollow posts, metal mesh is put on the step on hollow posts top, is then put
Enter sealing ring C, metal mesh is fixed by sealing ring C, hollow fixator and hollow posts；(4) hollow posts precession is tested
The inner thread mouth of lower vessel portion realizes the sealing of experiment container mouth and the fixation of hollow posts；(5) experiment is added into experiment container
Solution uses the pH value of metal surface under tack pH electrode measurement dirt.
2. the method for the lower metal surface pH value measurement of dirt according to claim 1, it is characterised in that the shape of metal mesh is in
Void column matching.
3. the method for the lower metal surface pH value measurement of dirt according to claim 1, it is characterised in that hollow fixator is with outer
The step above section of screw thread, hollow posts has internal screw thread.
4. the method for the lower metal surface pH value measurement of dirt according to claim 1, it is characterised in that the material and examination of metal mesh
It tests identical with the material of metal.
5. the method for the lower metal surface pH value measurement of dirt according to claim 1, it is characterised in that hollow fixator is hollow
Structure, experimental solutions can contact metal mesh.
6. the method for the lower metal surface pH value measurement of dirt according to claim 1, it is characterised in that in the outer of hollow posts lower part
Polytetrafluoro band, the inner thread mouth of precession experiment container lower part are wrapped at screw thread.
7. the method for the lower metal surface pH value measurement of dirt according to claim 1, it is characterised in that needed according to experiment in gold
Belong to online and adds dirty layer.
8. the method for the lower metal surface pH value measurement of dirt according to claim 1, it is characterised in that be added into experiment container
Experimental solutions, tack pH electrode are capable of measuring the corrosion products film formed on metal mesh in experimentation, microbial film and lead to
Cross the dirty layer that outer add mode is added in metal mesh.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810019245.7A CN110018209B (en) | 2018-01-09 | 2018-01-09 | Method for measuring pH value of metal surface under scale |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810019245.7A CN110018209B (en) | 2018-01-09 | 2018-01-09 | Method for measuring pH value of metal surface under scale |
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| CN110018209A true CN110018209A (en) | 2019-07-16 |
| CN110018209B CN110018209B (en) | 2021-06-25 |
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| CN102680382A (en) * | 2012-05-10 | 2012-09-19 | 中国石油化工股份有限公司 | Under-deposit corrosion experiment bracket and method for experimenting by using same |
| CN204008546U (en) * | 2014-08-22 | 2014-12-10 | 奥瑞金包装股份有限公司 | The electrochemical testing device of flaky metallic material |
| CN204116272U (en) * | 2014-09-18 | 2015-01-21 | 中国石油天然气股份有限公司 | Electrochemical device for testing under-deposit corrosion of elemental sulfur |
| CN104792838A (en) * | 2015-04-29 | 2015-07-22 | 中国船舶重工集团公司第七二五研究所 | Test pool device for electrochemical testing of metal base material coating |
| CN205643389U (en) * | 2016-04-12 | 2016-10-12 | 林理文 | A compound scanning microprobe of bipolar electrode for in site measurement metal surface pH value distribution |
| CN106404858A (en) * | 2016-08-30 | 2017-02-15 | 中国西电电气股份有限公司 | Test device for researching scaling process of substance in water |
| CN106525929A (en) * | 2016-12-02 | 2017-03-22 | 山东大学 | Electrolytic bath suitable for electrochemical test and sample surface analysis, and application thereof |
| CN206848141U (en) * | 2017-06-28 | 2018-01-05 | 滨州学院 | A kind of electrochemical corrosion test device |
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2018
- 2018-01-09 CN CN201810019245.7A patent/CN110018209B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102680382A (en) * | 2012-05-10 | 2012-09-19 | 中国石油化工股份有限公司 | Under-deposit corrosion experiment bracket and method for experimenting by using same |
| CN204008546U (en) * | 2014-08-22 | 2014-12-10 | 奥瑞金包装股份有限公司 | The electrochemical testing device of flaky metallic material |
| CN204116272U (en) * | 2014-09-18 | 2015-01-21 | 中国石油天然气股份有限公司 | Electrochemical device for testing under-deposit corrosion of elemental sulfur |
| CN104792838A (en) * | 2015-04-29 | 2015-07-22 | 中国船舶重工集团公司第七二五研究所 | Test pool device for electrochemical testing of metal base material coating |
| CN205643389U (en) * | 2016-04-12 | 2016-10-12 | 林理文 | A compound scanning microprobe of bipolar electrode for in site measurement metal surface pH value distribution |
| CN106404858A (en) * | 2016-08-30 | 2017-02-15 | 中国西电电气股份有限公司 | Test device for researching scaling process of substance in water |
| CN106525929A (en) * | 2016-12-02 | 2017-03-22 | 山东大学 | Electrolytic bath suitable for electrochemical test and sample surface analysis, and application thereof |
| CN206848141U (en) * | 2017-06-28 | 2018-01-05 | 滨州学院 | A kind of electrochemical corrosion test device |
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| CN110018209B (en) | 2021-06-25 |
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