39 results about "Erosion corrosion" patented technology

The invention belongs to the technical field of erosion corrosion experiment testing, and particularly discloses an erosion corrosion experiment device and method for liquid-solid two-phase flow immersion jet flow, a cooling system is designed for solving the problem that the temperature of an erosion corrosion solution is increased due to the throttling effect, the heat dissipation area of a circulating erosion system is increased through finned tubes, and the heat dissipation efficiency is improved. And the erosion corrosion solution flowing through the finned tube can transfer heat to the liquid in the heat exchange groove, so that the temperature of a fluid medium of the erosion corrosion solution in the circulating erosion system is reduced. According to the invention, the included angle between the sample and the nozzle can be changed through the angle adjusting mechanism so as to test the material damage condition under the impact of different angles and different flow velocities, so that the real-time monitoring of the electrochemical process of the liquid-solid two-phase flow damaged material is realized; the erosion corrosion damage process and mechanism of a material in a multiphase flow environment can be researched conveniently, and gas can be injected into the immersion jet tank through the gas storage bottle and the gas injection pipe so as to realize an under-pressure experiment for dissolving acid gas.

The invention relates to the technical field of heat exchangers, and discloses a variable-angle guide plate structure for a fluorine-coated steel heat exchanger, which comprises a shell, end sockets are mounted at the left and right ends of the shell, tube plates are mounted at the left and right ends of the inner wall of the shell, and a plurality of tube bundles are jointly mounted on the tube plates on the left and right sides in a penetrating manner; and a plurality of baffle plates which are uniformly distributed from left to right are mounted on the inner wall of the shell in a sliding manner. The variable-angle guide plate structure for the fluorine-coated steel heat exchanger can effectively solve the problems that in the prior art, a traditional fixed guide plate structure cannot optimize flow field distribution in real time, local retention of media in a shell pass can be caused to form a dead zone, or turbulent flow impact is caused by too high flow speed, heat exchange efficiency is reduced, erosion corrosion to a heat exchange pipe can be aggravated, and the service life of the heat exchange pipe is prolonged. The service life of equipment is shortened; the problems that a heat exchanger shell needs to be disassembled during angle adjustment, the industrial production continuity is seriously affected, a fluorine coating is likely to be scratched and fall off due to external force collision, and the anti-corrosion protection function of the heat exchanger shell is greatly attenuated are solved.

This invention discloses a method, equipment, medium, and product for quantitatively assessing the risk of erosion damage to pressure equipment, relating to the safety of pressure equipment in the petrochemical and chemical industries. The method includes: determining the damage form of the equipment; calculating a local / uniform thinning factor based on the damage form; calculating an equipment correction coefficient based on the local / uniform thinning factor, a general condition factor, a mechanical factor, and a process factor; calculating the probability of erosion corrosion failure based on the equipment correction coefficient, a management system evaluation coefficient, the average failure probability of similar equipment, and an impact coefficient for defects exceeding standards; calculating the leakage consequence area; determining the consequences of erosion corrosion failure based on the leakage consequence area; and establishing a two-dimensional risk matrix based on the probability of erosion corrosion failure and the consequences of erosion corrosion failure. The two-dimensional risk matrix is ​​used for real-time quantitative assessment of erosion risk. This invention can effectively guide the prevention and control of erosion corrosion risks in the petrochemical and chemical industries.

This utility model relates to the field of biogas hydrogen sulfide pipeline technology and discloses a protective structure for biogas hydrogen sulfide pipeline corrosion, including a transmission pipeline and a fixing sleeve. A spraying mechanism is fixedly installed on the side of the transmission pipeline, and a flow rate regulating mechanism is fixedly installed on the inner wall of the fixing sleeve. The flow rate regulating mechanism includes a bend, and a connecting block is fixedly installed on the inner wall of the bend. First, the speed of the drive motor is adjusted by the controller, thereby adjusting the flow rate generated when the fan blades rotate. Then, the drive motor is turned on, and the rotation of the drive motor drives the fan blades to rotate, thereby drawing air from outside the bend into the bend. The air is then diverted through the bend and split into eight transmission pipes, and then transmitted through a filter plate to the inside of the transmission pipeline. This adjustment of the flow rate inside the transmission pipeline helps to reduce the corrosiveness of hydrogen sulfide to the transmission pipeline. By controlling the upper limit of the flow rate, erosion corrosion is minimized, thus improving the protection of the transmission pipeline.

The application discloses a kind of test device and method for general erosion corrosion in fast reactor coolant environment, it is related to nuclear power material testing technical field, including corrosion kettle, heating device, stirring device and object table, heating device is used to heat corrosion kettle, stirring device includes rotary drive device and stirring assembly, the fixed end of rotary drive device is fixedly arranged on corrosion kettle, the driving end of rotary drive device is fixedly connected with stirring assembly, stirring assembly is inserted into corrosion kettle, for stirring the cooling medium in corrosion kettle, object table is arranged in corrosion kettle for carrying corrosion sample, gas inlet is provided on corrosion kettle, gas inlet is used to pass into hydrogen gas or oxygen gas mixture, to adjust the oxygen concentration in corrosion kettle.The application can truly reproduce the environment of flow medium erosion, corrosion deterioration and oxygen concentration synergistic effect under actual working condition.

The invention relates to the field of oil and gas well drilling and production, and discloses experimental equipment for simulating erosion corrosion of an oil and gas well at high temperature and high pressure and a use method thereof. The experimental equipment comprises an erosion corrosion fluid module, a corrosion fluid module, a reaction kettle and a damage analysis module. The erosion corrosion fluid module is used for manufacturing an erosion corrosion fluid material; the corrosive fluid module is used for manufacturing corrosive fluid materials. The reaction kettle is provided with a reaction chamber for mounting an experimental object, and the experimental object is a combined body comprising an oil pipe, a sleeve and a cement sheath; the experimental object and the reaction chamber act together to form a first chamber in the oil pipe and communicated with the erosion corrosion fluid module, a second chamber located between the oil pipe and the casing pipe and communicated with the erosion corrosion fluid module, and a third chamber located between the casing pipe and the cement sheath and communicated with the erosion corrosion fluid module. And the damage analysis module is used for analyzing the experimental object and obtaining an erosion-corrosion analysis result of the experimental object, so that the erosion-corrosion resistance test experiment of the material under the complex underground working condition is completed.

The invention discloses an erosion corrosion early warning method, device and equipment for a tail gas pipeline of a reduction furnace. The method comprises the following steps: firstly, acquiring multi-source real-time data of a target monitoring point in the tail gas pipeline of the reduction furnace; based on the multi-source real-time data, obtaining a future silicon powder mass concentration prediction sequence and a future airflow velocity prediction sequence; inputting the data into a pre-constructed dynamic wear rate model and an effective impact energy accumulation model, and respectively calculating to obtain a first future pipe wall residual thickness sequence and a second future pipe wall residual thickness sequence; comparing the predicted pipe wall residual thickness at each future moment in the future pipe wall residual thickness sequence with a preset pipe wall residual thickness safety threshold, and determining a first predicted residual life and a second predicted residual life; and finally, based on the first predicted residual life and the second predicted residual life, generating early warning information of the pipeline eroded and corroded by the silicon powder. According to the invention, high-precision and foresight early warning of the erosion corrosion risk of the tail gas pipeline of the reduction furnace can be realized.

The invention discloses seawater mortar erosion corrosion resistant steel and a preparation method thereof, belongs to the technical field of alloy steel, and solves the problems that wear-resistant steel in the prior art is high in high-cost element content and high in cost; and the erosion corrosion resistance of the existing wear-resistant steel is limited to be improved. The seawater mortar erosion corrosion resistant steel comprises the following components in percentage by mass: 0.12%-0.24% of C, 0.1%-0.6% of Si, 0.2%-1.17% of Mn, 2.0%-5.0% of Cr, 0.2%-1.0% of Al, 0.001%-0.003% of B, 0.01%-0.1% of Nb, less than or equal to 0.02% of P, less than or equal to 0.005% of S and the balance of Fe and inevitable impurities, and Cr / Al is more than or equal to 2 and less than or equal to 10. The seawater mortar erosion corrosion resistant steel is low in cost and excellent in mechanical property, welding property and seawater mortar erosion corrosion resistance.

The application discloses a safety measurement method, device and equipment of a multiphase flow pipeline and a medium, relates to the technical field of oil exploitation, and comprises the following steps: applying an alternating excitation signal to different electrode systems arranged on a target pipeline to obtain first electric impedance spectrum data and second electric impedance spectrum data of the target pipeline in a multiphase flow state. The first electric impedance spectrum data is converted into a complex dielectric constant, and a relaxation frequency is determined from the complex dielectric constant; according to the relationship between the relaxation frequency and the particle size, the crystal particle size is determined. According to the crystal particle size and the erosion time, the erosion loss is determined. The equivalent circuit model matched with the second electric impedance spectrum data is fitted to determine the corrosion characteristics. Based on the electric impedance spectrum technology, the accurate measurement of the particle size and the erosion corrosion of two scenes is realized, the method has the characteristics of simple operation, non-invasiveness and high measurement precision, and the safety transportation of the two-phase flow pipeline is ensured.

The invention belongs to the technical field of indirect air cooling system equipment protection, and relates to a preparation method of an SCAL type indirect air cooling system aluminum heat exchange pipe orifice and an aluminum heat exchange pipe. According to the invention, the aluminum heat exchange pipe orifice is designed into the horn mouth with a certain taper, so that the fluid dynamic condition of the pipe orifice is changed, and the flow erosion corrosion rate of the pipe orifice part is favorably reduced. The horn mouth length is obtained according to the original pipe diameter and the horn mouth taper, the horn mouth length is reasonably determined, and it is guaranteed that the horn mouth shape can fully play a role in reducing the flow erosion corrosion rate. And carrying out laser cladding on the horn mouth of the aluminum pipe orifice by adopting nickel-based alloy powder. And a nickel-based alloy coating is formed on the surface of the horn mouth of the aluminum pipe orifice, so that the wear resistance and corrosion resistance of the surface of the pipe orifice are enhanced. Through innovative design of the pipe orifice structure and strengthening treatment of the surface, the flow erosion corrosion rate of the pipe orifice part is remarkably reduced, and long-term protection of flow erosion corrosion of the aluminum heat exchange pipe orifice is facilitated.

The application discloses a tungsten steel metallographic analysis method cooperating with super-precision pretreatment and a novel corrosion system, and comprises the following steps: a, tungsten steel blank line cutting processing; b, nanoscale processing through a super-precision grinding machine; c, grinding and polishing treatment through a superfine diamond suspension to obtain a tungsten steel sample with a surface roughness Ra of a metallographic corrosion surface of less than or equal to 1 nm and parallelism of less than or equal to 0.1 microns; d, constructing a novel corrosion system: mixing a hydrogen peroxide solution with a mass fraction of 50% and a hydrofluoric acid solution with a mass fraction of 10% according to a volume ratio of 1:1 to obtain an HF-H2O2 corrosion liquid; e, metallographic corrosion of the tungsten steel sample through the HF-H2O2 corrosion liquid; f, cleaning and drying treatment after corrosion; and g, metallographic observation. The application can effectively balance high machining precision, efficient corrosion effect and environmental friendliness, and can effectively improve the analysis efficiency and result accuracy of tungsten steel metallographic analysis.

The present application relates to the technical field of metal material corrosion and protection, and particularly relates to a non-passivated metal material erosion corrosion evaluation method based on time-performance coupling, comprising setting test conditions and data collection schemes; synchronously collecting time-performance data; quantitatively determining three critical time nodes for dividing the whole erosion corrosion cycle into stages of different failure risk levels as the quantitative demarcation points of time-performance coupling; dividing the whole erosion corrosion cycle into risk stages; and performing comprehensive evaluation. The present application has the following advantages: based on the nonlinear evolution characteristics of the erosion corrosion damage mechanism, a dynamic evaluation system of time-performance coupling is established, the whole erosion corrosion cycle is divided into stages of different risk levels by quantitatively determining three critical time nodes, the precise mapping of the time dimension and the material performance attenuation process is realized, and the key problem that the traditional method cannot reflect the whole process behavior of the material from the initial damage to the final failure is solved.

The utility model discloses an erosion corrosion resistant throttle valve, which relates to the technical field of throttle valves and comprises a throttle valve body, one side of the throttle valve body is fixedly connected with a water inlet pipe, one side of the throttle valve body is fixedly connected with a water outlet pipe, and the inside of the water inlet pipe is fixedly connected with a second slow flow pipe. One side of the second flow slowing pipe is fixedly connected with a first flow slowing pipe, and the flow slowing device has the advantages that through mutual matching of the first flow slowing pipe and the first flow slowing plate, flowing media can be preliminarily buffered, so that the certain flow speed is reduced, the impact force on the third flow slowing plate is reduced, and the flow slowing effect is improved. And through mutual cooperation of a second flow slowing pipe, a flow slowing groove and a second flow slowing plate, a flowing medium can be further shunted and buffered, so that the impact force of the medium on the inner walls of the water inlet pipe, the throttling valve body and the water outlet pipe is reduced, and the service life of the erosion-corrosion-resistant throttling valve is prolonged.

A method for electroplating palladium-nickel alloy on the surfaces of copper and copper alloy parts comprises the steps that S1, the surfaces of the copper and copper alloy parts are degreased; s2, pre-corrosion is carried out; the part without oil stains on the surface is placed in a hydrochloric acid solution to be pre-corroded, and after corrosion is completed, the part is rapidly washed clean with running water; s3, emitting light; the pre-corroded part is placed in a mixed solution of chromic anhydride and sulfuric acid to be continuously shaken for bright dipping treatment; s4, scrubbing with magnesium oxide; degreasing cotton is soaked with water, then pasty magnesium oxide is dipped, the surface of the bright part is scrubbed, and the surface of the bright part is washed clean with deionized water; s5, weak corrosion; the part without water drops on the surface is placed in a hydrochloric acid solution to be continuously shaken for weak corrosion treatment; S6, copper plating is conducted; placing the part subjected to weak corrosion in a mixed solution composed of cuprous cyanide, potassium cyanide and sodium hydroxide for copper electroplating to obtain a part with a copper plating layer on the surface; s7, plating a palladium-nickel alloy; and S8, the part with the copper plating layer on the surface is placed in palladium-nickel alloy electroplating liquid to be electroplated with palladium-nickel alloy, and drying is conducted.

The embodiment of the invention provides detection equipment. The detection equipment comprises a container, a power mechanism and a sample wafer bracket, the container is used for accommodating a liquid-cooled working medium. The power mechanism comprises a rotating shaft and fan blades, the fan blades are located in the liquid cooling working medium, and the rotating shaft can drive the fan blades to rotate so that the liquid cooling working medium can flow in the container and form vortexes. The sample wafer bracket is used for placing at least one layer of sample wafers, each layer of sample wafers comprises a plurality of sample wafers, the plurality of sample wafers are distributed at intervals along the circumferential direction of the rotating shaft, and the sample wafer bracket is positioned between the fan blades and the container along the radial direction of the rotating shaft, so that the sample wafers are positioned in the eddy current of the liquid cooling working medium. According to the detection equipment provided by the embodiment of the invention, the problem of low accuracy of detection data of the detection equipment on the erosion corrosion of the liquid cooling working medium on the cold plate in the related technology is solved.

The present application relates to a kind of elbow liquid-solid two-phase flow erosion corrosion inhibiting device, including spiral pipe, elbow and cathodic protection power supply, reference electrode and auxiliary anode are installed in the middle of elbow, the terminal portion of reference electrode is fixed with signal transmitter, signal transmitter is connected with the reference cable of cathodic protection power supply, auxiliary anode is connected with the positive terminal of cathodic protection power supply by anode cable, cathode connection terminal is connected with the negative terminal of cathodic protection power supply by cathode cable, zero position connection terminal is connected with the zero position terminal of cathodic protection power supply by zero position cathode cable.The present application makes full use of the advantages of spiral flow generated by spiral pipe to reduce the scouring effect of solid particles on elbow wall and the advantages of cathodic protection to effectively inhibit electrochemical corrosion, inhibits scouring and corrosion component and its synergistic effect component from two aspects of fluid mechanics and electrochemistry, and provides a simple and efficient device for the prevention and treatment of elbow multiphase flow erosion corrosion in engineering site.

The invention discloses a gas-liquid-solid three-phase porous jet erosion corrosion experimental device and experimental method, and belongs to the technical field of erosion corrosion experimental testing. The experimental device comprises a jet system, a sand adding system and a gas injection system, the jet system comprises a jet chamber, and a bearing device for mounting a sample to be tested is arranged in the jet chamber; a jet main pipeline is arranged on the jet chamber, the tail end of the jet main pipeline is connected with a nozzle, and the outlet center of the nozzle is over against the surface center of the to-be-tested sample; the sand adding system comprises a sand bearing measuring cylinder, and a bottom outlet of the sand bearing measuring cylinder is communicated with the top of the jet flow main pipeline; the air injection system comprises an air compressor, and the air compressor is connected with a liquid input pipeline through an air injection pipeline; the to-be-tested sample is connected with a copper conductor to serve as a working electrode, and a counter electrode and a reference electrode are further arranged in the jet chamber. The device can be used for gas-liquid-solid three-phase jet flow experiments and under-pressure / non-under-pressure experiment tests, and has wider and practical functions.

The utility model relates to the technical field of pipelines, and provides a pipeline spiral elbow with strong bearing capacity, which comprises an elbow body, connectors are fixed at two ends of the elbow body, a reinforcing structure is fixed on the outer wall of the elbow body, and a turbulent flow structure is arranged on one side in the elbow body. The turbulent flow structure is arranged, the turbulent flow pieces are symmetrically distributed in an inclined mode, fluid can be guided to flow spirally, turbulent flow and vortex are reduced, pressure loss is reduced, conveying efficiency is improved, a flow guide system composed of the center piece and the limiting pieces can evenly distribute fluid impact force, local erosion corrosion is avoided, and the service life of the elbow is prolonged. According to the pipeline spiral elbow with the high bearing capacity, the limiting block is connected with the elbow body in a clamped mode through the limiting groove, the damaged turbulent flow assembly can be conveniently and rapidly disassembled and replaced, the maintenance cost is reduced, the device has the functions of turbulent flow of liquid in the pipe and convenient and rapid disassembly, and the service life of the pipeline spiral elbow with the high bearing capacity is prolonged.

The application provides a multiphase flow erosion corrosion test device and method. In the multiphase flow erosion corrosion test device: a plurality of gas tanks are connected with a plurality of pressure regulating valves one by one, the plurality of pressure regulating valves are connected with a gas storage tank, the gas storage tank is connected with a pressure reducing valve, the pressure reducing valve is connected with an adjustable flow valve, the adjustable flow valve is connected with a first heater, the first heater is connected with a first ball valve; a second ball valve is connected with a second heater, the second heater is connected with a mud pump, the mud pump is connected with a solid-liquid mixing tank; a third ball valve is connected with a booster pump, the booster pump is connected with a third heater, the third heater is connected with a fourth ball valve and a fifth ball valve respectively, the fourth ball valve and the fifth ball valve are connected with an erosion cavity and a test pipeline one by one; the third ball valve is connected with the first ball valve and the second ball valve respectively.

The invention discloses a boiler soot blowing method, system, medium and equipment, and relates to the technical field of coal-fired boiler heating surface cleaning. According to the boiler operation state data of the recent historical time period, the soot deposition change condition of the boiler in the subsequent time period is predicted, the optimal soot blowing strategy of each soot blower in the boiler is determined through the trained reinforcement learning model according to the prediction result and the boiler operation state data, traditional trigger type soot blowing control is avoided, and the soot blowing efficiency is improved. Preventive and continuous cleaning measures can be taken before the dust accumulation problem is serious, and the boiler is always kept in an efficient operation interval. Not only can consumption of soot blowing media be obviously reduced, but also unnecessary erosion corrosion to boiler pipelines can be reduced to the maximum extent, and the service life of equipment is prolonged. And meanwhile, the comprehensive influence of different soot blowing operation sequences on future long-term benefits of the system is evaluated based on state conversion of the whole system of the boiler, so that a soot blowing strategy most favorable for the overall efficiency and economical efficiency of a power plant can be found.

The present application relates to a kind of regeneration tower corrosion prevention and control method, comprising the following steps: S1, to the regeneration tower is carried out multiphase flow software simulation extraction regeneration tower different parts several positions flow field parameters calculate chemical corrosion and erosion corrosion;S2, to the regeneration tower accessory pipeline is carried out multiphase flow software simulation extraction regeneration tower accessory pipeline different parts several positions flow field parameters calculate chemical corrosion and erosion corrosion;S3, according to the analysis data of step S1 and step S2, the corrosion risk behavior analysis of regeneration tower and its accessory pipeline is carried out, confirms that chemical corrosion is mainly function;S4, according to the analysis result of step S3, by reducing the concentration of hydrogen sulfide in water to reduce the rate of chemical corrosion, by improving temperature to reduce the concentration of hydrogen sulfide dissolved in water to improve process conditions;S5, the process conditions of regeneration tower after step S4 are improved are used in alcohol amine method desulfurization system.A beneficial effect is that the corrosion of regeneration tower in alcohol amine method desulfurization system is relieved, prevention and control.

The present application belongs to the technical field of pipeline erosion corrosion and electrochemical corrosion measurement, and particularly relates to a multi-angle erosion corrosion and in-situ electrochemical testing device, which maintains the basic characteristics of the pipeline as a whole, the flow state in the pipeline is close to the actual pipeline flow state, and the main structure comprises an outer sleeve, an inner sleeve arranged in the outer sleeve, a reference electrode arranged on the outer sleeve, a working electrode and an auxiliary electrode arranged on the inner sleeve, and an electrochemical workstation connected with the reference electrode, the working electrode and the auxiliary electrode, can effectively simulate the actual working condition of the pipeline, realize the fixed erosion angle erosion corrosion test of the metal sample and the coating sample, can perform the weight loss and electrochemical measurement, and can realize the erosion corrosion test of the metal sample and the coating sample under the cathodic protection state, obtain the corrosion data of the sample under the cathodic protection, and in addition, the positions of the working electrode, the auxiliary electrode and the reference electrode are fixed, do not have a significant impact on the flow state, and are beneficial to the stability of the electrochemical test process.

The application discloses a high-temperature bearing steel original austenite grain boundary display method, which comprises the following steps: (1) performing grinding and polishing treatment on a to-be-observed surface of a sample; (2) performing primary corrosion on the to-be-observed surface by using a nitric acid alcohol solution, and the corrosion time is 1-3 minutes; (3) slightly polishing the to-be-observed surface of the sample corroded in the step 2; (4) performing secondary corrosion on the to-be-observed surface of the sample, and a corrosion agent is prepared from a nitric acid alcohol solution, a ferric chloride alcohol solution and a copper sulfate alcohol solution, and the corrosion time is 1-3 minutes; (5) slightly polishing the to-be-observed surface of the sample corroded in the step 4; and (6) placing the to-be-observed surface of the sample in a 5%-10% nitric acid alcohol solution for third corrosion, and the corrosion time is 0.5-1 minute. The method can effectively display the high-temperature bearing steel original austenite grain boundary, and has the advantages of easy acquisition of the corrosion agent, convenient preparation, simple operation process and the like.

The application provides a cast titanium alloy material resistant to seawater scouring corrosion and a preparation method thereof, and relates to the technical field of cast titanium alloy materials.The chemical composition of the alloy material according to the application comprises, in percentage by mass, 5.8-6.5% of Al, 3.8-4.5% of V, 0.8-1.5% of Zr, 0.8-1.5% of Nb, 0.1-0.3% of O, 0.2-0.5% of Fe, and the rest is Ti.The preparation method comprises the following steps: mixing raw materials of titanium sponge, Al beans, AlV 58 , TiFe 32 , TiO2 powder, AlNb 70 powder and zirconium sponge, and then pressing the mixture into electrode blocks; assembling the electrode blocks into long-stripe electrodes; performing multiple melting on the long-stripe electrodes and pouring to obtain alloy samples; taking out the alloy samples after cooling after pouring, and performing hot isostatic pressing to obtain titanium alloy samples.In the application, by adding zirconium elements, niobium elements, and trace amounts of oxygen elements and iron elements into the titanium alloy, the seawater scouring corrosion resistance of the titanium alloy is greatly improved, and the design and manufacturing requirements of large ship parts subjected to seawater scouring are met.

The utility model discloses corrosion monitoring equipment, including corrosion monitoring device and first connecting piece, corrosion monitoring equipment includes insulating shell, at least one for monitoring corrosion's sample to be measured, first fixed structure and the second fixed structure of setting corresponding each sample to be measured, the shell is the hollow structure of two end portions closed, and the upper side is equipped with a plurality of intercommunication holes, the sample to be measured is located the inside of shell and is fixed through the second fixed structure, and the intercommunication hole is connected with the outside in the inside of shell, the lateral surface of shell is equipped with the accommodation groove, and the first connecting piece part is located in the accommodation groove and is fixed through the first fixed structure. The porous insulating shell of the corrosion monitoring device can form flowing bin, can guarantee sample to be measured and outside fluid full contact, can prevent sample to be measured and shell contact and take place galvanic corrosion simultaneously, and corrosion monitoring effect is reliable. And, the corrosion monitoring equipment is integral type detachable structure, can be used repeatedly, saves manual and material cost.

The invention discloses a double-channel deslagging device of a molten pool smelting furnace, and belongs to the technical field of non-ferrous metal smelting equipment. The slag discharging device comprises a slag inlet pipe, one end of the slag inlet pipe is communicated with a first slag discharging pipe and a second slag discharging pipe, the first slag discharging pipe, the second slag discharging pipe and the slag inlet pipe form a Y-shaped structure, the first slag discharging pipe and the second slag discharging pipe are symmetrically distributed with the axis of the slag inlet pipe as the symmetry axis, and the first slag discharging pipe and the second slag discharging pipe are obliquely arranged downwards; the positions of slag outlets of the first slag outlet pipe and the second slag outlet pipe are lower than the other ends of the first slag outlet pipe and the second slag outlet pipe, and a spherical crown flow blocking weir protruding outwards is arranged between the first slag outlet pipe and the second slag outlet pipe. The device can effectively reduce the flow speed of the slag, relieve erosion corrosion and splashing conditions generated in the slag discharging process, and prolong the service life of components such as the slag groove.

The invention provides a high-temperature-resistant corrosion inhibitor for washing sulfur-containing flue gas. The corrosion inhibitor comprises a solid agent A and a liquid agent B, the solid agent A comprises polyether-ether-ketone; the liquid agent B comprises a first auxiliary agent and a second auxiliary agent; the first auxiliary agent is prepared by a method comprising the following processes: performing a first reaction on polyvinyl pyridine and 1, 2-dichloroethane to obtain quaternized polyvinyl pyridine, and then performing a second reaction on the quaternized polyvinyl pyridine and N, N-dimethyl-N '-lauroyl-1, 3-propane diamine to obtain the first auxiliary agent; the second auxiliary agent is a compound obtained by synthesizing acetylthiazole, cinnamyl aldehyde and diethylenetriamine through a Mannich reaction. The corrosion inhibitor provided by the invention has excellent high temperature resistance, can delay corrosion of metal in a sulfur-containing flue gas washing service environment at 120-220 DEG C, and can improve the mass transfer cooling effect of flue gas and a washing solution so as to reduce erosion corrosion.

The present application relates to the field of crack propagation test of stress corrosion, corrosion fatigue and fracture toughness, and particularly relates to a system for in-situ monitoring of crack length of compact tension specimen in harsh corrosion environment and a use method thereof. Two short sides of a T-shaped connecting assembly are fixed at both sides of a center crack opening of a CT specimen, a long side head of the T-shaped connecting assembly is inserted into a through hole on one side of a turning block, a displacement transmission rod is clamped by a separated ohmic clamp on the other side of the turning block, an inductive core on the upper end of the displacement transmission rod is threadedly connected to a LVDT inserted into a high-temperature and high-pressure kettle cover, a spacer is threadedly and tightly sealed on the high-temperature and high-pressure kettle cover, a water cooling jacket is arranged outside the spacer, the LVDT is connected to the upper end of the spacer through a thread and a sealing washer, and the LVDT is connected to a data collector. The present application uses the flexibility method to obtain a relationship expression between the opening displacement of the crack opening of the CT specimen and the crack length, so that the crack length of the CT specimen in the harsh corrosion environment can be monitored in-situ.

This invention discloses a corrosion-resistant and wear-resistant steel and its manufacturing method, belonging to the technical field of wear-resistant steel and its preparation. The chemical composition of the wear-resistant steel, by weight percentage, is: C≤0.22%, Si≤0.50%, Mn≤0.50%, P≤0.025%, S≤0.010%, Ni≤0.25%, Cr≤5.00%, Mo≤0.10%, rare earth + Nb≤0.1%, with the balance being Fe, and the sum of the above components is 100%. A new process is adopted, using a specific alloy design of Cr + rare earth La and Ce + low-defect continuous casting + high-penetration rolling + multi-beam array jet constrained roll quenching, to produce wear-resistant steel with an alloy content ≤6 wt%, a thickness of 8-40 mm, and a surface hardness of 430-470 HBW. Under acidic conditions with a pH value of 4-7, its corrosion and wear resistance is more than twice that of conventional NM450, while also possessing good machinability and weldability.

The application provides a composite plate structure display method, the composite plate is a composite plate of carbon steel and stainless steel, and the method comprises the following steps: surface treatment: after sampling the composite plate, polishing, cleaning and drying are performed on the surface of the sample; primary corrosion: a first corrosion solution composed of hydrogen peroxide, hexamethylenetetramine and water is used for corrosion, and cleaning and drying treatment are performed after the corrosion is completed; activation: an activation solution composed of citric acid and water is used for sample activation, and then cleaning and drying treatment are performed; secondary corrosion: a second corrosion solution composed of alcohol and nitric acid is used for corrosion, and cleaning and drying treatment are performed after the corrosion is completed; structure display: microscopic structure analysis is performed on the sample corroded for the second time under a microscope. The structure display method of the application corrodes the stainless steel and the carbon steel respectively, the carbon steel is not corroded when the stainless steel is corroded, over-corrosion of the carbon steel is avoided, and therefore the stainless steel and the carbon steel can be corroded to the right position respectively.