CN116625810A - Method for evaluating damage of hydrogen diffusion to elastic property of material of hydrogen-contacting equipment - Google Patents
Method for evaluating damage of hydrogen diffusion to elastic property of material of hydrogen-contacting equipment Download PDFInfo
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- CN116625810A CN116625810A CN202211223251.7A CN202211223251A CN116625810A CN 116625810 A CN116625810 A CN 116625810A CN 202211223251 A CN202211223251 A CN 202211223251A CN 116625810 A CN116625810 A CN 116625810A
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- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 189
- 239000001257 hydrogen Substances 0.000 title claims abstract description 189
- 239000000463 material Substances 0.000 title claims abstract description 69
- 238000009792 diffusion process Methods 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 22
- 125000004435 hydrogen atom Chemical class [H]* 0.000 title claims description 14
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 134
- 150000002431 hydrogen Chemical class 0.000 claims abstract description 43
- 238000009826 distribution Methods 0.000 claims abstract description 42
- 238000012360 testing method Methods 0.000 claims abstract description 25
- 238000003860 storage Methods 0.000 claims abstract description 14
- 238000012937 correction Methods 0.000 claims abstract description 13
- 239000012611 container material Substances 0.000 claims abstract description 10
- 238000007254 oxidation reaction Methods 0.000 claims description 8
- 230000003647 oxidation Effects 0.000 claims description 6
- 238000009864 tensile test Methods 0.000 claims description 5
- 238000005259 measurement Methods 0.000 claims description 4
- 230000000295 complement effect Effects 0.000 claims description 3
- 238000013211 curve analysis Methods 0.000 claims description 3
- 238000011156 evaluation Methods 0.000 abstract description 8
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 9
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 230000010287 polarization Effects 0.000 description 4
- 239000008151 electrolyte solution Substances 0.000 description 3
- 229910052697 platinum Inorganic materials 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- -1 hydrogen ions Chemical class 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000006722 reduction reaction Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0033—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining damage, crack or wear
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/32—Hydrogen storage
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- Health & Medical Sciences (AREA)
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- Aviation & Aerospace Engineering (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention discloses a method for evaluating damage of hydrogen diffusion to elastic properties of materials of hydrogen-contacting equipment, which comprises the following steps: s1, carrying out electrochemical pre-charging treatment on a material of hydrogen equipment under different current densities to obtain samples under different hydrogen concentration distributions; s2, establishing a relationship between the hydrogen charging current and the hydrogen concentration on the surface of the sample and the distribution condition of the hydrogen concentration in the sample; s3: obtaining a hydrogen diffusion coefficient D and a correction coefficient gamma of a hydrogen storage container material through a test; s4, establishing a relationship between the hydrogen diffusion coefficient D and the charging current density; s5, obtaining corresponding elastic modulus by using the samples with different hydrogen concentration distribution in the S1; s6, establishing a relation between the elastic property of the sample and the hydrogen concentration distribution in the sample, and measuring the influence of hydrogen on the elastic property of the material more accurately, so that the evaluation result is more comprehensive and reliable.
Description
Technical Field
The invention relates to the technical field of damage to elastic properties of materials of hydrogen equipment by hydrogen diffusion, in particular to a method for evaluating damage to elastic properties of materials of hydrogen equipment by hydrogen diffusion.
Background
At present, the detection of the elastic property of the material after hydrogen diffusion is less, the influence of the gradient distribution of the hydrogen concentration in the material on the non-uniformity of the distribution of the mechanical property of the material is not considered, so that the obtained mechanical properties such as the elastic property and the like cannot accurately reflect the real property of the material, the damage condition of the material is wrongly judged, and the equipment is expensive and the error of the test result is extremely large by using nano indentation measurement.
Disclosure of Invention
Therefore, the invention provides a method for evaluating the damage of hydrogen diffusion to the elastic property of a material of a hydrogen-contacting device, so as to solve the defects in the prior art.
A method for evaluating damage of hydrogen diffusion to elastic properties of a material of a hydrogen-contacting device, comprising the steps of:
s1: electrochemical pre-charging hydrogen treatment is carried out on the material of the hydrogen-contacting equipment under different current densities to obtain samples under different hydrogen concentration distributions;
s2: establishing a relationship between a charging current and the hydrogen concentration on the surface of the sample and the distribution condition of the hydrogen concentration in the sample;
s3: obtaining a hydrogen diffusion coefficient D and a correction coefficient gamma of a hydrogen storage container material through a test;
s4: establishing a relationship between the hydrogen diffusion coefficient D and the hydrogen charging current density;
s5: obtaining corresponding elastic modulus by using the samples with different hydrogen concentration distribution in the S1;
s6: and establishing the relation between the elastic property of the sample and the hydrogen concentration distribution in the sample.
Preferably, the current density in the S1 is set between 0.2mA/cm2 and 500mA/cm 2;
the electrochemical pre-charging treatment in S1 charges the sample to a steady state at the charging current density (surface hydrogen concentration) in which the hydrogen concentration distribution tends to be.
Preferably, in the step S2, the relationship between the charging current and the hydrogen concentration on the surface of the sample and the distribution model of the hydrogen concentration in the sample are:
wherein IC is total hydrogen charging current, D is hydrogen diffusion coefficient corresponding to the test material, the function erfc (x) is Gaussian complementary error function, S is working area of the hydrogen charging surface of the material, D is material density, L is thickness of the material in hydrogen diffusion direction after hydrogen charging, t is hydrogen charging time, and x is distance from the hydrogen charging surface in the material.
Preferably, in the step S3, the measurement of the hydrogen diffusion coefficient D and the correction coefficient γ of the hydrogen storage container material includes the following steps:
s31: an electrochemical permeation test is selected to measure the hydrogen diffusion coefficient D and the correction coefficient gamma of the hydrogen storage container material;
s32: setting the current density of the electrochemical permeation test to correspond to the pre-charging current density, wherein the interval is between 0.2mA/cm < 2> -500 mA/cm < 2 >;
s33: and analyzing an electrochemical permeation curve obtained by the electrochemical permeation test by a time delay method to obtain the diffusion coefficient D and the correction coefficient gamma.
Preferably, the time-lag analytical model is:
wherein tL is a lag time corresponding to the hydrogen permeation curve, and the lag time selects a time corresponding to the anodic oxidation current in the hydrogen permeation curve at a steady-state current value of 0.63.
Preferably, the sample is processed by selecting a slow rate tensile test.
Preferably, the method comprises the following steps:
s41: sequentially passing the sample which is charged with hydrogen in the S2 to a stable state under the condition that the hydrogen concentration distribution tends to the charging current density (surface hydrogen concentration) through the slow-rate tensile sample to obtain a stress-strain curve;
s42: the elastic modulus of the sample reaching the steady state at different charging current densities (surface hydrogen concentration) was obtained by the S41 stress-strain curve analysis.
Preferably, the hydrogen concentration corresponding to the test set current density is calculated according to the relationship between the charging current and the hydrogen concentration on the surface of the sample and the hydrogen concentration distribution model in the sample.
Preferably, the relationship between the elastic modulus and the corresponding hydrogen concentration of the steady-state sample is obtained at different charging current densities (surface hydrogen concentrations) according to S42.
Preferably, a fitting function of the elastic modulus of the material of the hydrogen-contacting device and the corresponding hydrogen concentration is established, the elastic modulus of the corresponding gradient distribution is obtained when the gradient distribution of the hydrogen concentration is obtained, and the regression coefficient R2> =0.95 is used for evaluating the damage of the elastic property of the material of the hydrogen-contacting device to a certain extent.
The invention has the following advantages:
the hydrogen diffusion can cause the damage of the mechanical property of the hydrogen-contacting equipment, the hydrogen concentration in the hydrogen-contacting equipment material is in gradient distribution in the hydrogen diffusion process until the hydrogen charging is carried out until the hydrogen concentration distribution tends to be in a stable state under the hydrogen concentration of the surface, at the moment, the gradient difference of the hydrogen concentration in the hydrogen-contacting equipment material is greatly reduced, the concentration distribution tends to be uniform, and the hydrogen-contacting equipment material in the state is tested by a tensile test to obtain more accurate mechanical property of the material; the relation between the obtained mechanical properties and the hydrogen concentration is established, and the influence of different hydrogen concentrations on the mechanical properties of the material can be obtained, so that the damage of hydrogen diffusion on the elastic properties of the material of the hydrogen-contacting equipment is evaluated; the influence of hydrogen on the elastic performance of the material is measured more accurately, so that the evaluation is more comprehensive and reliable; the current state of the material can be known through the hydrogen diffusion time and the hydrogen concentration in the hydrogen storage container, so that the production safety is greatly ensured, and the service life of the hydrogen storage equipment is prolonged; the evaluation method is convenient to operate, and the evaluation result is more accurate and reliable.
Drawings
FIG. 1 is a schematic flow chart of an evaluation method of the present invention;
FIG. 2 is a schematic diagram of the current distribution of the cathode and anode in the test electrolyte solution of the present invention;
FIG. 3 is a schematic diagram of the operation of the CS2350 electrochemical workstation of the present invention.
Detailed Description
The invention is further described in connection with the following detailed description, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the invention easy to understand.
As shown in fig. 1 to 3, the present invention provides a method for evaluating damage of hydrogen diffusion to elastic properties of a material of a hydrogen-contacting apparatus, comprising the steps of:
s1: electrochemical pre-charging hydrogen treatment is carried out on the material of the hydrogen-contacting equipment under different current densities to obtain samples under different hydrogen concentration distributions; specific:
in the embodiment of the invention, a test device is provided with cathode polarization current as shown in figure 2, 0.2mol/L NaOH solution is selected as electrolyte solution, a platinum electrode is communicated with a reference electrode joint of an anode of an electrochemical workstation and an auxiliary electrode to form an electrochemical hydrogen charging test anode, the end is subjected to 4OH < -4 > e < -2H2O+O2 < - # > oxidation reaction, a working electrode joint of a cathode is communicated with a sample to form a cathode of the electrochemical hydrogen charging test, and 4H2O+4e < -2Hads+H2 # +4OH < -reduction reaction occurs. The current density is set between 0.2mA/cm < 2> -500 mA/cm < 2>, and the electrochemical pre-charging treatment in the step S1 charges the sample to a stable state under the charging current density (surface hydrogen concentration) when the hydrogen concentration distribution tends to be the same.
S2: establishing a relationship between a charging current and the hydrogen concentration on the surface of the sample and the distribution condition of the hydrogen concentration in the sample; specific:
in the step S2, the relation between the charging current and the hydrogen concentration on the surface of the sample and the distribution model of the hydrogen concentration in the sample are as follows:
wherein IC is total hydrogen charging current, D is hydrogen diffusion coefficient corresponding to the test material, the function erfc (x) is Gaussian complementary error function, S is working area of the hydrogen charging surface of the material, D is material density, L is thickness of the material in hydrogen diffusion direction after hydrogen charging, t is hydrogen charging time, and x is distance from the hydrogen charging surface in the material.
And calculating the hydrogen concentration corresponding to the test set current density according to the relationship between the hydrogen charging current and the hydrogen concentration on the surface of the sample and the hydrogen concentration distribution model in the sample.
And establishing a fitting function of the elastic modulus of the material of the hydrogen-contacting equipment and the corresponding hydrogen concentration, obtaining the elastic modulus of the corresponding gradient distribution when the hydrogen concentration is distributed in a gradient manner, and evaluating the elastic property damage of the material of the hydrogen-contacting equipment due to hydrogen diffusion to a certain extent, wherein the regression coefficient R2> =0.95.
The samples were processed by selecting a slow rate tensile test. The method comprises the following steps:
s41: sequentially passing the sample which is charged with hydrogen in the S2 and has the hydrogen concentration distribution tending to a steady state under the charging current density (surface hydrogen concentration) through the slow-rate tensile sample to obtain a stress-strain curve;
s42: the elastic modulus of the sample reaching the steady state at different charging current densities (surface hydrogen concentration) was obtained by the S41 stress-strain curve analysis.
According to the relation between the elastic modulus and the corresponding hydrogen concentration of the sample in a steady state at different hydrogen charging current densities (surface hydrogen concentrations) in the step S42.
S3: obtaining a hydrogen diffusion coefficient D and a correction coefficient gamma of a hydrogen storage container material through a test; specific:
in S3, the measurement of the hydrogen diffusion coefficient D and the correction coefficient γ of the hydrogen storage container material includes the following steps:
s31: an electrochemical permeation test is selected to measure the hydrogen diffusion coefficient D and the correction coefficient gamma of the hydrogen storage container material;
s32: setting the current density of the electrochemical permeation test to correspond to the pre-charging current density, wherein the interval is between 0.2mA/cm < 2> -500 mA/cm < 2 >;
s33: and analyzing an electrochemical permeation curve obtained by the electrochemical permeation test by a time delay method to obtain the diffusion coefficient D and the correction coefficient gamma.
The device of the embodiment of the invention is shown in fig. 3, and a CS2350 electrochemical workstation is selected for test, wherein a main working unit and a secondary working unit respectively control an anode chamber and a cathode chamber of a double electrolytic cell, and working electrodes, a reference HgO electrode and an auxiliary platinum electrode in the main working unit jointly form a three-electrode system. The electrolytic cell connected with the main working unit is added with 0.2mol/L NaOH solution, the main unit is set to be potentiostatic anodic polarized to form an anode chamber as shown on the right side of fig. 3, at the moment, the nickel plating surface of the sample to which potentiostatic anodic polarization is applied is contacted with electrolyte solution in the anode chamber, the nickel plating surface (diffusion surface) of the sample undergoes oxidation reaction, ionizable impurities in the sample are eliminated, and gradually reduced anodic oxidation current is generated, when residual oxidation current tends to be stable and less than 1.5 mu A/cm < 2>, no ionizable impurities can be considered in the sample, and the slave unit can be connected with the electrolytic chamber on the left side of fig. 3. The slave unit WE is connected with a sample, RE and CE are connected with a platinum electrode, 0.2mol/L NaOH solution is added into the electrolytic cell, and the slave unit is set to be constant-current cathode polarization, so that a cathode chamber in the double electrolytic chambers is formed. The hydrogen atoms generated by the reduction reaction H2O+e- & gtOH- +H in the cathode chamber are adsorbed on one side surface of the cathode chamber of the sample, the adsorbed hydrogen atoms are diffused in the material under the action of concentration gradient and current, when the adsorbed hydrogen atoms are diffused to the surface of the anode chamber material from the surface of the cathode chamber material, the hydrogen ions are oxidized by the constant potential anodic polarization applied to the anode chamber to generate hydrogen ions so as to generate gradually increased anodic oxidation current, and when the concentration distribution of the hydrogen in the material tends to be uniform and reaches a stable state, the anodic current generated by ionization of the diffused hydrogen atoms also reaches a stable state.
The time-lag analytical model is:
wherein tL is a lag time corresponding to the hydrogen permeation curve, and the lag time selects a time corresponding to the anodic oxidation current in the hydrogen permeation curve at a steady-state current value of 0.63.
S4: establishing a relationship between the hydrogen diffusion coefficient D and the hydrogen charging current density;
s5: obtaining corresponding elastic modulus by using the samples with different hydrogen concentration distribution in the S1;
s6: and establishing the relation between the elastic property of the sample and the hydrogen concentration distribution in the sample.
The hydrogen diffusion can cause the damage of the mechanical property of the hydrogen-contacting equipment, the hydrogen concentration in the hydrogen-contacting equipment material is in gradient distribution in the hydrogen diffusion process until the hydrogen charging is carried out until the hydrogen concentration distribution tends to be in a stable state under the hydrogen concentration of the surface, at the moment, the gradient difference of the hydrogen concentration in the hydrogen-contacting equipment material is greatly reduced, the concentration distribution tends to be uniform, and the hydrogen-contacting equipment material in the state is tested by a tensile test to obtain more accurate mechanical property of the material; the relation between the obtained mechanical properties and the hydrogen concentration is established, and the influence of different hydrogen concentrations on the mechanical properties of the material can be obtained, so that the damage of hydrogen diffusion on the elastic properties of the material of the hydrogen-contacting equipment is evaluated; the influence of hydrogen on the elastic performance of the material is measured more accurately, so that the evaluation is more comprehensive and reliable; the current state of the material can be known through the hydrogen diffusion time and the hydrogen concentration in the hydrogen storage container, so that the production safety is greatly ensured, and the service life of the hydrogen storage equipment is prolonged; the evaluation method is convenient to operate, and the evaluation result is more accurate and reliable.
While the invention has been described in detail in the foregoing general description and specific examples, it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the invention and are intended to be within the scope of the invention as claimed.
Claims (10)
1. A method for evaluating damage of hydrogen diffusion to elastic properties of a material of a hydrogen-contacting apparatus, comprising the steps of:
s1, carrying out electrochemical pre-charging treatment on a material of hydrogen equipment under different current densities to obtain samples under different hydrogen concentration distributions;
s2, establishing a relationship between the hydrogen charging current and the hydrogen concentration on the surface of the sample and the distribution condition of the hydrogen concentration in the sample;
s3, obtaining a hydrogen diffusion coefficient D and a correction coefficient gamma of the hydrogen storage container material through a test;
s4, establishing a relationship between the hydrogen diffusion coefficient D and the charging current density;
s5, obtaining corresponding elastic modulus by using the samples with different hydrogen concentration distribution in the S1;
s6, establishing a relation between the elastic property of the sample and the concentration distribution of hydrogen in the sample.
2. A method of evaluating damage to elastomeric properties of a material for a hydrogen-bearing device as in claim 1, wherein: the current density in the S1 is set between 0.2mA/cm2 and 500mA/cm 2;
the electrochemical pre-charging treatment in S1 charges the sample to a steady state at the charging current density (surface hydrogen concentration) in which the hydrogen concentration distribution tends to be.
3. A method of evaluating damage to elastomeric properties of a material for a hydrogen-bearing device as in claim 1, wherein: in the step S2, the relation between the charging current and the hydrogen concentration on the surface of the sample and the distribution model of the hydrogen concentration in the sample are as follows:
wherein IC is total hydrogen charging current, D is hydrogen diffusion coefficient corresponding to the test material, the function erfc (x) is Gaussian complementary error function, S is working area of the hydrogen charging surface of the material, D is material density, L is thickness of the material in hydrogen diffusion direction after hydrogen charging, t is hydrogen charging time, and x is distance from the hydrogen charging surface in the material.
4. A method of evaluating damage to elastomeric properties of a material for a hydrogen-bearing device as in claim 1, wherein: in S3, the measurement of the hydrogen diffusion coefficient D and the correction coefficient γ of the hydrogen storage container material includes the following steps:
s31: an electrochemical permeation test is selected to measure the hydrogen diffusion coefficient D and the correction coefficient gamma of the hydrogen storage container material;
s32: setting the current density of the electrochemical permeation test to correspond to the pre-charging current density, wherein the interval is between 0.2mA/cm < 2> -500 mA/cm < 2 >;
s33: and analyzing an electrochemical permeation curve obtained by the electrochemical permeation test by a time delay method to obtain the diffusion coefficient D and the correction coefficient gamma.
5. The method for evaluating the damage of hydrogen diffusion to the elastic properties of a material for a hydrogen-contacting apparatus according to claim 4, wherein:
the time-lag analytical model is:
wherein tL is a lag time corresponding to the hydrogen permeation curve, and the lag time selects a time corresponding to the anodic oxidation current in the hydrogen permeation curve at a steady-state current value of 0.63.
6. A method of evaluating damage to elastomeric properties of a material for a hydrogen-bearing device as in claim 1, wherein: the samples were processed by selecting a slow rate tensile test.
7. The method of evaluating damage to elastic properties of a material of a hydrogen-contacting apparatus by hydrogen diffusion according to claim 6, comprising the steps of:
s41: sequentially passing the sample which is charged with hydrogen in the S2 to a stable state under the condition that the hydrogen concentration distribution tends to the charging current density (surface hydrogen concentration) through the slow-rate tensile sample to obtain a stress-strain curve;
s42: the elastic modulus of the sample reaching the steady state at different charging current densities (surface hydrogen concentration) was obtained by the S41 stress-strain curve analysis.
8. A method of evaluating damage to elastomeric properties of a material for a hydrogen-bearing device by hydrogen diffusion according to claim 3, wherein: and calculating the hydrogen concentration corresponding to the test set current density according to the relationship between the hydrogen charging current and the hydrogen concentration on the surface of the sample and the hydrogen concentration distribution model in the sample.
9. The method of evaluating damage to elastic properties of a material of a hydrogen-contacting device by hydrogen diffusion according to claim 7, wherein: according to the relation between the elastic modulus and the corresponding hydrogen concentration of the sample in a steady state at different hydrogen charging current densities (surface hydrogen concentrations) in the step S42.
10. A method of evaluating damage to elastomeric properties of a material for a hydrogen-bearing device as in claim 9, wherein:
and establishing a fitting function of the elastic modulus of the material of the hydrogen-contacting equipment and the corresponding hydrogen concentration, obtaining the elastic modulus of the corresponding gradient distribution when the hydrogen concentration is distributed in a gradient manner, and evaluating the elastic property damage of the material of the hydrogen-contacting equipment due to hydrogen diffusion to a certain extent, wherein the regression coefficient R2> =0.95.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117153305A (en) * | 2023-08-29 | 2023-12-01 | 天津大学 | Method for establishing pipeline steel equivalent wet hydrogen sulfide environment hydrogen charging model and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117153305A (en) * | 2023-08-29 | 2023-12-01 | 天津大学 | Method for establishing pipeline steel equivalent wet hydrogen sulfide environment hydrogen charging model and application thereof |
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