94 results about "Corrosion behavior" patented technology

The invention relates to the technical field of material corrosion and protection, discloses a TP2 copper corrosion behavior testing method based on temperature regulation and control, and aims to solve the problem that in the prior art, various physical and chemical parameters in the corrosion process are difficult to synchronously obtain under the same microscale, so that a local corrosion dynamics mechanism cannot be deeply revealed. The core of the system is a coaxial three-function composite probe integrated with thermal, acoustic and electrochemical sensing units, and the coaxial three-function composite probe is matched with a synchronous laser heating module and a multi-physical field synchronous control system. During testing, the probe scans on the surface of a sample, local thermal disturbance is applied to each pixel point, and the interface temperature, acoustic impedance and corrosion rate data of the point are synchronously collected. According to the invention, through high integration in structure and accurate synchronization in time, the space mismatch error of multi-source measurement is eradicated, and multi-physical field distribution images which are accurately corresponding to each other can be obtained in situ and losslessly.

The invention discloses a high-corrosion-resistance magnesium alloy and a preparation method and application thereof, and belongs to the technical field of magnesium alloys, the high-corrosion-resistance magnesium alloy is based on multi-element rare earth microalloying and dispersed Mg17Al12 phase synergistic regulation, in the high-corrosion-resistance magnesium alloy, a fine dispersed Mg17Al12 second phase is evenly distributed in a whole magnesium matrix, and the high-corrosion-resistance magnesium alloy has the advantages that the high-corrosion-resistance magnesium alloy is obtained; the magnesium alloy has the beneficial effects that the magnesium alloy is good in corrosion resistance, uniform corrosion of a magnesium matrix is promoted, and the micro-galvanic corrosion effect between the Mg17Al12 phase and the magnesium matrix is greatly weakened, so that serious local corrosion of the magnesium alloy in a traditional AZ91 alloy is converted into a uniform corrosion behavior, and the corrosion resistance of the magnesium alloy is greatly improved.

The present invention discloses a method for predicting an internal corrosion rate of an oil and gas pipeline based on IWOA-SVM. The method comprises the following steps: S1. selecting factors that are representative of and correlated with internal corrosion behavior during operation of the oil and gas pipeline as input variables; S2. preprocessing the input variables and organizing the processed data into a dataset; S3. dividing the dataset into a training set and a test set; S4. establishing a corrosion rate prediction model for the oil and gas pipeline based on IWOA-SVM, and predicting the internal corrosion rate. The invention enhances the traditional whale algorithm and integrates it with the SVM method. The improvement includes introducing adaptive weights and nonlinear convergence factors, thereby balancing global search and local exploitation capabilities, making it have strong global search capabilities and is less likely to become trapped in local optima.

The invention discloses an improved LSTM (Long Short Term Memory)-based method and device for predicting a corrosion behavior of an iron-chromium alloy in a closed environment. The method comprises the following steps: acquiring corrosion dynamics experimental data of the iron-chromium alloy; based on the improved LSTM model, constructing an iron-chromium alloy corrosion model; the corrosion kinetics experimental data are input into the ferrochromium alloy corrosion model, and corrosion kinetics prediction data are obtained; based on the improved LSTM model, combining physical constraint conditions to construct an iron-chromium alloy oxidation weight gain prediction model; obtaining a weight change prediction value and an oxidation rate prediction value of the iron-chromium alloy through the iron-chromium alloy oxidation weight increment prediction model; and obtaining the corrosion behavior of the ferrochromium alloy according to the corrosion kinetics prediction data, the weight change prediction value and the oxidation rate prediction value. The method can improve the accuracy of iron-chromium alloy corrosion behavior prediction, and can be widely applied to the technical field of machine learning.

The invention provides an ammonia hydrogen energy structure material constant strain rate and constant load stress corrosion synchronous monitoring platform based on acoustic emission and an implementation method thereof. Comprising a gas supply and pressurization system, a constant strain rate and constant load stress corrosion synchronous test system, a gas leakage safety control system, an acoustic emission and digital image correlation (DIC) technology online monitoring analysis system, a temperature control system and a computer integrated analysis system. In-situ dynamic analysis of stress corrosion crack propagation is realized in combination with a DIC technology; the temperature control system realizes accurate temperature control on the corrosion test reaction kettle through an independent temperature control module; the computer integrated analysis system processes multi-source data, and establishes dynamic mapping between acoustic emission characteristic parameters and corrosion crack growth rate. The platform solves the problems of off-line monitoring, single loading mode and the like of a traditional corrosion test, captures a corrosion-induced crack propagation process in real time, improves test efficiency and analysis comprehensiveness, and provides powerful support for research on corrosion behaviors of ammonia hydrogen energy structural materials.

The invention discloses a coating zirconium alloy fuel cladding tube corrosion test method, which comprises the following steps: providing a corrosion medium for simulating a pressurized water reactor primary loop water chemical environment, and arranging a coating-free contrast sample, the unit area corrosion rate of a zirconium alloy base material in a corrosion medium and the total mass change of a single-coating target sample in the corrosion medium are obtained by combining a weighing method, and microscopic parameters such as the thickness of a coating corrosion layer, the cross section content of key elements, spatial distribution and the like are measured so as to quantify the coating corrosion consumption; and deducting the base material corrosion mass change from the total mass change of the target sample according to the base material corrosion rate of the comparison sample, separating the coating corrosion mass change, and obtaining a coating corrosion evolution model in combination with the real coating corrosion rate calculated after microscopic parameter verification. The method breaks through the limitation that a traditional weighing method cannot split the independent corrosion behavior of the coating, and provides a basis for corrosion mechanism research, coating corrosion stage division, rate prediction and failure critical time judgment.

The present invention belongs to the field of material performance simulation. Specifically disclosed is a method for constructing a relationship between the non-soluble deposit density and the corrosion rate on the basis of finite element simulation. In the method of the present invention, by means of establishing a finite element model, constructing a relationship between the non-soluble deposit density and the porosity and performing simulation analysis on corrosion behaviors under different non-soluble deposit density conditions, a relationship between the non-soluble deposit density and the corrosion rate is constructed. The method of the present invention can effectively predict corrosion behaviors of a material under different non-soluble deposit density conditions, can provide a scientific basis for material protection design, and has wide application prospects.

The utility model relates to the technical field of electrochemical measurement, and discloses a thin liquid film electrochemical measurement device based on metal corrosion simulation, which comprises a workbench, one side above the workbench is fixedly connected with a rotating base, and the upper part of the rotating base is rotatably connected with a support rod. According to the thin liquid film electrochemical measurement device based on metal corrosion simulation, through the arrangement of the three electrodes, the sealing box, the sealing cover and the regulation and control mechanism, when thin liquid film electrochemical measurement is carried out, a measurement instrument sets the measured temperature and potential, a liquid barrel accurately controls the amount of thin film liquid, and a heating piece and a temperature sensor jointly accurately control the experimental temperature; the reference electrode provides stable potential to ensure that a stable experimental environment is maintained in the sealing box, the measuring instrument collects electrochemical data in real time and analyzes the electrochemical data, and a graphical interface on the display screen is provided for display, so that the experimental environment and electrochemical parameters are accurately controlled, and the corrosion behavior of metal can be efficiently simulated and analyzed.

The present application relates to the technical field of material performance testing, and discloses a material corrosion testing device and testing method for simulating ocean acidification environment, comprising: a closed simulation testing cabin, which is internally divided into a top-down salt mist simulation cabin, a wet heat simulation cabin and a high-pressure immersion simulation cabin by horizontally arranging openable and closable upper and lower insulation boards, and is provided with a cabin door with a sealing structure at the top; through the independent modular design of the salt mist simulation cabin, the wet heat simulation cabin and the high-pressure immersion simulation cabin, and the automatic switching function of the rotatable lifting sample holder, the present device realizes precise coupling and seamless switching of corrosion environments such as salt mist spraying, high temperature and high humidity, and deep sea high pressure, and the sample can complete the whole cycle corrosion behavior research of the marine atmospheric zone, the splash zone, the tidal zone and the full immersion zone on the same platform, and eliminates the interface effect caused by the traditional multiple equipment series connection testing.

The invention provides a material surface and interface damage in-situ characterization system for multi-factor coupling corrosion, and relates to the technical field of in-situ detection equipment. The technical problem that in the prior art, in-situ microscopic observation cannot be conducted on a material surface interface in a simulated service environment, and the dynamic evolution rule of surface interface corrosion behaviors in the same area in the corrosion process cannot be accurately tracked is solved. According to the material surface and interface damage in-situ characterization system for multi-factor coupling corrosion, simulation of heat, salt and force multi-field coupling corrosion is achieved through a salt mist generating device, a multi-point heating module and a corrosion-resistant loading table, an X-ray diffractometer is allowed to conduct in-situ diffraction testing through an X-ray incident window and an X-ray emergent window, corrosion product in-situ phase analysis under the simulated working condition is achieved, and in-situ phase analysis of the corrosion product under the simulated working condition is achieved. And the corrosion-resistant loading table can enter the electron microscope for micro-area structure and micro-area component analysis, the multi-point heating module can keep the consistency of the sample state in the X-ray diffractometer and the electron microscope, and different heating sites can be used for heat, salt and force environment experiments.

The invention discloses a contact network positioning wire clamp coupling experiment device and an experiment method, relates to the technical field of contact network testing, and solves the technical problem that the actual clamping state of a positioning wire clamp cannot be well simulated due to the fact that the performance research of an existing positioning wire clamp mostly focuses on static mechanical properties or corrosion behaviors in a single environment. The device comprises a positioning wire clamp; two contact line fixing bases are arranged on the positioning substrate, and the two ends of the contact line are connected with the two contact line fixing bases respectively; the lower end of the upper clamping rod is connected with the upper end of the positioning wire clamp, and the upper end of the upper clamping rod is connected with a fatigue testing machine; the upper end of the lower clamping rod is detachably connected with the positioning base plate, and the lower end of the lower clamping rod is connected with a fatigue testing machine; the horizontal load applying module is arranged on the positioning substrate and is connected with the positioning wire clamp; the device has the advantages of being capable of accurately simulating the actual mechanical state of the positioning wire clamp and the like.

The invention discloses a long-period high-flux high-temperature lead-bismuth corrosion test device, and relates to the technical field of lead-bismuth corrosion experiments.Sample rods of an annular array sample frame are evenly distributed around a stirring assembly in the circumferential direction, a modular clamp is arranged at the tail end of each sample rod, and a single clamp integrates multiple independent sample groove positions, so that a high-flux test is achieved; parallel corrosion tests of various materials and various working conditions can be completed in a single experiment, and compared with a traditional single-sample experiment, the material screening efficiency is greatly improved, and the experiment period is shortened; the corrosion behavior of the ODS-FeCrAl alloy under different doping proportions and different corrosion time is tested and analyzed under the oxygen control condition, the long-term service condition of a nuclear reactor structure material in a lead-bismuth coolant environment can be accurately simulated, and a reliable experimental basis is provided for corrosion resistance evaluation and service life prediction of the material.

The present disclosure provides a pipeline corrosion inhibition system, method and electronic device. The present disclosure obtains corresponding concentration time series data by sequentially performing isobaric equilibrium sampling and concentration detection on at least one impurity in the pipeline through a sampling and detection module; corrosion simulation module, inputting the concentration time series data into a simulated pipeline to perform corrosion simulation, obtaining corrosion state data and simulated working condition data; pipeline life prediction module, receiving the concentration time series data, corrosion state data and simulated working condition data, inputting the data into a data fusion prediction model to obtain the pipeline remaining life and corrosion risk index; control module, sending a first control instruction to the sampling and detection module, and sending a second control instruction to the anti-corrosion module; anti-corrosion module, based on the second control instruction, performing at least one corrosion inhibition treatment. The present disclosure can comprehensively reflect the influence of the joint action of multiple impurities in the environment on the pipeline corrosion behavior, improve the accuracy, and can adapt to various scenes.

The invention provides an in-situ monitoring method and system for monitoring the corrosion behavior of a weathering resistant steel welded joint, and relates to the technical field of corrosion monitoring. An electrochemical impedance measurement value of a monitoring area is collected and serves as a boundary condition to be input into a pre-established electric field distribution model for solving, and the corrosion behavior of the weathering resistant steel welded joint is monitored. Therefore, a two-dimensional conductivity distribution is obtained in each monitoring period and a conductivity map is generated. A first conductivity map sequence is formed by repeating the process, and key components with the conductivity changing along with time are analyzed and extracted. And reconstructing a conductivity background in an uncorroded state based on the key components, and deducting the background from the first sequence to obtain a second conductivity map sequence representing conductivity change caused by local corrosion. And when the conductivity variable quantity in the second sequence exceeds a preset threshold value, judging that the monitoring area is corroded, and determining the corrosion position, outline and stage. According to the method, accurate positioning, form recognition and stage judgment of the corrosion behavior of the weathering resistant steel welded joint can be achieved.

The invention discloses a steel rail foot friction corrosion behavior research method, and belongs to the technical field of railway steel rail service performance research and failure mechanism evaluation. The research method comprises the following steps: preparing a U75V steel rail and PA66 lining cylindrical sample, constructing a test platform consisting of a control motor and an electrochemical test system, carrying out reciprocating friction and potentiodynamic and constant potential corrosion loading in a 3.5% NaCl solution, collecting corresponding corrosion current data, and analyzing the surface failure behavior. The invention aims to provide the method for researching the friction corrosion behavior of the rail foot of the steel rail, which is characterized in that a repeatable, controllable and low-cost test platform is constructed by simplifying an experimental device and combining a control motor and an electrochemical system, and a cooperative acceleration failure mechanism between fretting wear and crevice corrosion is disclosed.

The application discloses a kind of theoretical model for evaluating pipeline steel macro-battery corrosion under elastic-plastic deformation, the theoretical model includes following physical field and coupling mechanism thereof: physical field: (1) stress-strain field: the elastic-plastic mechanics constitutive model based on von Mises yield criterion and isotropic hardening criterion is used to characterize the mechanical behavior of pipeline steel;(2) electrochemical field: the electrode kinetics model based on Tafel equation is used to characterize the corrosion reaction kinetics process on the surface of pipeline steel;Coupling mechanism: the mechanical-electrochemical double-path coupling mechanism for characterizing macro-battery corrosion.The model realizes the quantitative description of the macro-battery corrosion behavior induced by elastic-plastic deformation by coupling the mechanical deformation and electrochemical corrosion process of the material.The application realizes the two-way interaction of stress-strain field and electrochemical field under the background of macro-battery corrosion, and can quantitatively reveal the regulation of deformation on the intensity and evolution process of macro-battery corrosion.

The invention discloses a material corrosion test device and method for simulating a nucleation boiling environment, and belongs to the field of nuclear power. The material corrosion test device for simulating the nucleation boiling environment comprises a circulating system, a test system and a control system, wherein the circulating system provides a circulating pipeline for accommodating a test solution; the test system comprises a test sleeve and a heating module, a test pipe fitting is installed in the test sleeve, and the heating module heats the test pipe fitting in an internal heating mode and provides an axial temperature field distributed in a gradient mode. The control system comprises a void fraction control module, and the output power of the heating module is adjusted according to a void fraction control algorithm so as to accurately control the void fraction formed on the surface of the test pipe fitting. The test device can accurately simulate the corrosion behavior of the fuel rod cladding tube in the nucleation boiling environment under the actual working condition, and has positive significance for improving the prediction precision of the corrosion behavior.

This invention relates to the field of ring main unit (RNU) structural sealing performance testing technology, and provides a method and system for detecting perfluorohexanone (PFH) mixed gas leakage in RNUs. The method includes obtaining corrosion behavior prediction data based on a corrosion behavior prediction model using acquired monitoring images of sea salt particle deposition on the target sealing structure of the RNU and acoustic emission signal data; predicting corrosion damage based on a corrosion damage prediction model using the corrosion behavior prediction data and ultrasonic echo signal data of the target sealing structure; and determining the gas leakage location by performing sound source localization analysis based on the corrosion damage prediction result and acoustic emission signal data when the corrosion damage prediction result meets preset gas leakage conditions. This invention, based on corrosion damage mechanism research, achieves real-time quantitative analysis of the corrosion degree of the sealing structure and real-time accurate monitoring of the mixed gas leakage location, providing a reliable guarantee for the safe operation of RNUs.

The invention relates to the technical field of corrosion tests and equipment, in particular to a tidal range natural acceleration device and a test method.Seawater liquid level changes are monitored in real time through a liquid level sensor, the natural rising tide frequency a and falling tide frequency b of the previous day are obtained, a sample frame is controlled to execute up-down reciprocating motion at N times of frequency, and N is the acceleration rate; and after a plurality of test periods, respectively measuring the corrosion rates of the accelerated test and the naturally exposed sample, calculating the acceleration ratio, and constructing a gray prediction model based on the relationship between the acceleration ratio and time for extrapolating and predicting the natural corrosion behavior of the material in a longer period. According to the invention, a mechanical lifting system capable of being accurately controlled is constructed in a natural seawater tidal range region, so that the frequency of a material drying and wetting alternation process is enhanced, and the corrosion process is obviously accelerated on the premise of not changing the authenticity of a marine environment; the double problems that a traditional indoor acceleration test is poor in correlation with the actual service environment and the natural exposure test period is too long are solved.

The application relates to the technical field of material corrosion behavior modeling and industrial equipment data analysis, and provides a unified correlation modeling method for air conditioner operation parameters and multi-material corrosion behavior; the technical route is as follows: operation parameter collection, corrosion data acquisition, data matching and alignment, sensitive parameter screening, single-material response construction, multi-material unified modeling and model verification output, and the method specifically comprises the following steps: air conditioner operation parameter collection, multi-material corrosion data acquisition, data matching and alignment, corrosion sensitive parameter screening, single-material corrosion response relationship construction, multi-material unified modeling, model verification and output. The application has the following advantages: unified modeling of corrosion behaviors of various engineering materials is realized, the generalization ability of the model among different materials is improved, the model interpretability and engineering practicability are enhanced, the comparability expression of corrosion behaviors of different materials is realized, scientific decision of material selection is supported, and the application is suitable for large-scale deployment and corrosion management of various air conditioning systems.

The invention belongs to the technical field of deep sea corrosion experimental equipment, and particularly relates to an integrated deep sea high-pressure microbial corrosion simulation system and a use method thereof. The system comprises a control system, an electrochemical workstation, a high-pressure corrosion simulation device, a microbial culture device, a temperature control assembly and a real-time monitoring assembly, and data collection and control are performed through the control system; the high-pressure corrosion simulation device comprises a high-pressure kettle, the high-pressure corrosion simulation device is connected with the microorganism culture device, and the microorganism culture device comprises a reaction kettle. According to the invention, pressure and microbial corrosion in the deep sea environment can be simulated, and the corrosion behavior of the metal material in the deep sea environment can be comprehensively and accurately monitored in cooperation with a tensile test and electrochemical corrosion monitoring. Through cooperative work of the autoclave and the reaction kettle, it is guaranteed that the pressure in the autoclave meets the deep sea pressure requirement, it is guaranteed that a culture medium input into the autoclave is sterile from the source, the purity of an experiment and the accuracy of data are guaranteed, and the real environment can be better simulated.

The invention discloses an aluminum alloy surface corrosion process prediction method considering residual strain, and particularly relates to the field of aero-engine protection. Comprising the following steps: acquiring oxide film components and a corresponding crystal structure on the surface of the aluminum alloy in a corrosion environment, extracting corrosion medium ions, and constructing a surface model; determining the tensile strength and the compression strength of the surface model; constructing a plurality of adsorption configurations; determining a residual strain range according to the tensile strength and the compression strength; in the residual strain range, tensile or compressive strain is applied to any adsorption configuration, and the adsorption energy of current corrosive medium ions in the adsorption configuration under different strains is determined; determining diffusion barriers of corrosive medium ions in the oxidation film under different strains; determining the adsorption energy-diffusion barrier ratio of the corrosion medium ions in the adsorption configuration under each strain; and predicting the corrosion process of the aluminum alloy surface according to the adsorption energy-diffusion barrier ratio under each strain. By means of the method, the corrosion behavior under the complex working condition can be accurately predicted.

The invention discloses an offshore power station corrosion prediction method, device and equipment and a storage medium, and relates to the technical field of marine corrosion monitoring, and the method comprises the steps: obtaining the environment monitoring data of an offshore power station; the actual corrosion state of the target monitoring part on the offshore power station is determined, and the determining mode of the actual corrosion state comprises at least one of the steps of applying a high-frequency signal and adjusting thermocouple probe monitoring; and predicting the corrosion state of the target monitoring part according to the environment monitoring data and the actual corrosion state to obtain the predicted corrosion state of the target monitoring part. According to the method, the real-time environment data is associated with the real corrosion response of the structure, and multi-source information fusion analysis of the environment driving factors and the actual corrosion behavior of the structure is realized, so that the corrosion state of the key part of the offshore wind turbine generator is accurately predicted, and a reliable basis is provided for timely finding corrosion hidden dangers and formulating targeted protective measures.

The invention discloses a microbial corrosion control method based on biological membrane attachment area regulation, which comprises the following steps: under the condition of keeping the volume of a liquid culture medium and a bacterial strain unchanged, introducing solid fillers which account for a fixed total volume but have different specific surface areas into a closed anaerobic reactor so as to form a multi-stage attachable area; a pretreated metal sample is placed in the closed anaerobic reactor, and the surface of the sample is only in contact with the culture medium and the biological membrane distribution area determined by the filler; and culturing at the same temperature and time, and synchronously monitoring the growth, corrosion rate and gas production rate of the biological membrane, so as to establish a quantitative relationship among biological membrane distribution area-corrosion behavior-mechanical property, and realize directional control of the microbial corrosion process by regulating and controlling area parameters.

The application discloses a kind of aluminum alloy surface corrosion process prediction methods considering residual strain, specifically related to the field of aero-engine protection.It includes: obtaining the composition of the oxide film on the surface of aluminum alloy and the corresponding crystal structure under the corrosion environment, extracting the corrosion medium ions, and constructing a surface model; Determine the tensile and compressive strength of the surface model; Build multiple adsorption configurations; According to the tensile and compressive strength, determine the residual strain range; Within the residual strain range, apply tension or compression strain to any adsorption configuration, determine the adsorption energy of the current corrosion medium ions in the adsorption configuration under different strains; Determine the diffusion barrier of the corrosion medium ions in the oxide film under different strains; Determine the adsorption energy-diffusion barrier ratio of the corrosion medium ions in the adsorption configuration under each strain; According to the adsorption energy-diffusion barrier ratio under each strain, predict the corrosion process of the aluminum alloy surface. Through the above method, the corrosion behavior under complex working conditions can be accurately predicted.

This invention discloses an online assessment system for the corrosion resistance of high-nitrogen steel under multi-factor coupled corrosion, belonging to the field of metal corrosion monitoring and assessment technology. It includes modules for data acquisition, feature processing, state evolution, path matching, and performance evaluation. The data acquisition module collects multivariate time-series corrosion data in real time through a sensor array. The feature processing module obtains a corrosion dynamic feature vector through missing value imputation, abnormal fluctuation filtering, and multi-source data time synchronization alignment. The state evolution module inputs the vector into a pre-trained deep corrosion behavior prediction model, generating a micro-corrosion state evolution map through a multi-layer feature fusion network. The path matching module matches the corresponding corrosion kinetic evolution path. The performance evaluation module calculates performance degradation curves at different depth levels and generates a quantitative report on corrosion resistance levels. This system can achieve accurate characterization of the micro-evolution of high-nitrogen steel corrosion and online quantitative assessment of layered corrosion resistance under multi-factor coupled environments.

The invention discloses a method for regulating and controlling stress corrosion cracking of microorganisms. The method comprises the following steps: preparing a U-shaped sample and calibrating a stress concentration area of the U-shaped sample; under the condition of constant culture medium volume, strain and inoculum size, constructing a biological membrane attachment area gradient by adding solid fillers with different specific surface areas; immersing the sample subjected to stress application into a culture medium, and enabling a stress concentration area to directly face the maximum attachment surface; after constant-temperature culture, corrosion indexes are detected, SEM is combined to observe crack morphology and XPS is combined to analyze product components, a quantitative relation of'biofilm attachment area corrosion rate crack propagation depth 'is established, and microbial stress corrosion behaviors are directionally controlled by regulating and controlling the attachment area. According to the method, the influence mechanism of biological membrane distribution on stress corrosion cracking of the material can be accurately analyzed.

The invention discloses a CO2 stress corrosion test system and method for a non-adhesive flexible pipe, and relates to the technical field of ocean engineering and oil and gas equipment tests. The system comprises a base and a supporting frame, an axial loading device, an internal pressure and torsion loading device, a follow-up bending moment balancing device and an end follow-up sealing device are arranged on the base, and a movable lifting environment chamber device is arranged on the supporting frame. The follow-up bending moment balancing device and the end follow-up sealing device form a flexible boundary constraint system, and the movable lifting environment chamber device is used for locally forming a high-temperature and high-pressure COcorrosion environment on the outer wall of the flexible pipe, can move in the axial direction of the flexible pipe and synchronously ascends and descends along with bending displacement in the alternating bending loading process. Therefore, the position of a corrosion area is kept stable under the dynamic load condition, and through the collaborative design of multi-load coupling loading, a local movable corrosion environment and multi-source online monitoring, true simulation and quantitative evaluation of the COstress corrosion behavior of the non-adhesive flexible pipe under the actual service working condition are achieved.

The application provides a method for preparing an aluminum electrode by molten salt-ultrasonic synergistic modification and application, and relates to the technical field of metal electrode material smelting and preparation. The method comprises raw material configuration and mixing, construction of a molten salt / aluminum liquid two-phase reaction system, ultrasonic synergistic molten salt etching and in-situ metal loading, selective interface screening and directional transport, ultrasonic driving interfacial migration and dispersion anchoring, cooling and solidification, and finally obtaining an MXene dispersed embedded aluminum-based composite anode material. The obtained MXene sheet layer has a thickness of 10-500-nm, a lateral size of 200nm-20um, and a surface rich in -F, -O and -Cl functional groups, and the loaded metal exists in the form of surface adsorption or interlayer embedding. The aluminum-based composite anode material prepared by the application can effectively inhibit the hydrogen evolution side reaction and self-corrosion behavior, reduce the corrosion current density, improve the anode utilization rate and maintain high discharge performance, and can be applied to aluminum-air batteries, aluminum-oxygen batteries, aluminum-ion batteries and other energy storage devices with aluminum as the negative electrode, and is also suitable for the fields of metal corrosion prevention and interface regulation.

The invention provides a high-flow-rate supercritical carbon dioxide environmental material corrosion experimental device and a detection method, stable and controllable supercritical carbon dioxide fluid is provided through cooperation of a supercritical fluid pump, a precise preheater and a back pressure valve, and fully-closed circular flow of a working medium is realized by using a high-frequency regulating valve and an anti-backflow one-way valve. A multi-channel parallel high-pressure reaction kettle structure is adopted, and an independently controlled variable-power heating and cooling module is matched, so that a high-flow-rate, variable-temperature and variable-load corrosion environment is synchronously applied to a plurality of samples. And a high-precision carbon monoxide analyzer is integrated to monitor the carbon monoxide concentration in the reaction process in real time, so that the dynamic calculation of the corrosion rate, the preliminary prediction of the material life and the early warning of the oxide skin peeling risk are realized. The device can highly simulate the real service condition of the pressure-bearing component in the supercritical carbon dioxide Brayton cycle system, and provides an experimental platform for researching the corrosion behavior of a material in a high-temperature, high-pressure and high-flow-rate coupling environment.