267 results about "Surface corrosion" patented technology

The application discloses a kind of ship super-long anticorrosion special nano powder coating, preparation method and application, belong to ship heavy anticorrosion material technical field.The preparation method of the ship super-long anticorrosion special nano powder coating is as follows: epoxy resin, graphene modified epoxy resin, core-shell structure ZnO@SiO2, modified 2,5-dimercapto-1,3,4-thiadiazole, borosilicate glass powder, flaky boron nitride, silane coupling agent modified silica, phenolic amine curing agent, 2-ethyl-4-methylimidazole, fumed silica, defoaming agent, ultraviolet absorber, high-temperature pigment are put into stirrer and stirred for 20-30min, then melt extrusion is carried out through double screw extruder, the extrusion temperature is 90-110 DEG C, grinds and sieves, and the ship super-long anticorrosion special nano powder coating is obtained.The coating prepared by the application has good anticorrosion performance and can be applied in the field of ship metal surface corrosion protection.

The invention discloses an acid liquid system based on synergistic interaction of a corrosion inhibitor and an iron stabilizer and a preparation method, and relates to the technical field of oilfield chemistry, the acid liquid system comprises the following components by mass: 10%-20% of an acid liquid, 0.5%-3% of a composite corrosion inhibitor, 0.5%-2% of an iron stabilizer, 0.1%-0.5% of a discharge aiding agent, 0.2%-0.8% of an acid thickening agent, and the balance of water; the main component of the composite corrosion inhibitor in the acid liquid system is long-chain alkyl bis-imidazoline-thiadiazole amide hydroxypropyl sulfobetaine, and the composite corrosion inhibitor contains a bis-imidazoline ring and a thiadiazole amide ring, and can form more stable multi-active-site adsorption on the metal surface to form a compact and stable protective film, so that the metal surface corrosion resistance is improved, and the metal surface corrosion resistance is improved. Long carbon chains in molecules can effectively block corrosive media, N, O and S heteroatoms in the molecules are adsorbed on the iron surface through lone pair electrons to inhibit corrosion, the slow-release effect is further enhanced, and therefore the slow-release efficiency is improved by 40% or above.

The invention relates to the technical field of measurement and testing, and discloses a method and device for detecting corrosion and pits on the outer surface of a pipeline, and the method comprises the steps: synchronously collecting three-dimensional point cloud and temperature field distribution of the surface of the pipeline and ultrasonic echo and visible light images, and constructing a four-dimensional information matrix; processing the point cloud data and the infrared image, extracting a pit morphology parameter and a corrosion roughness index of the point cloud, and obtaining a maximum temperature gradient of the infrared image and a texture feature of the visible light image; constructing a channel attention network adaptive weighted fusion multi-source feature, segmenting a corrosion region, and classifying pit defects by using a graph convolutional network based on a point cloud topological graph structure; calculating allowable working pressure of the corrosion area, triggering early warning, evaluating a pit strain concentration coefficient, and generating a detection result. The problems that in the prior art, the omission ratio is high, a single sensor cannot recognize small defects sufficiently, and oil stain rusty spot interference misjudgment exists are solved, and the purposes of high detection precision, low maintenance cost and high automation degree are achieved.

The invention discloses a method for improving performance of rare earth permanent magnet sintered neodymium iron boron grain boundary diffusion, and belongs to the technical field of rare earth permanent magnet materials. The method comprises the steps that a low-melting-point metal layer and a diffusion layer containing heavy rare earth elements are sequentially formed on the surface of a clean sintered neodymium-iron-boron magnet, and then vacuum diffusion heat treatment and tempering treatment are conducted. Wherein the low-melting-point metal layer comprises at least one of copper, aluminum, gallium and tin or an alloy of the copper, the aluminum, the gallium and the tin; the heavy rare earth element comprises at least one of dysprosium, terbium, holmium and gadolinium. The low-melting-point metal layer is preferentially diffused and wets the grain boundary in the heat treatment process, heavy rare earth elements are promoted to be deeply and uniformly diffused towards the interior of the magnet along the grain boundary, so that a heavy rare earth-rich shell layer is formed outside main phase grains of the magnet, and the intrinsic coercive force is improved; meanwhile, the low-melting-point metal forms a strengthening phase at the grain boundary, the brittleness of the magnet after diffusion is improved, the surface corrosion phenomenon is restrained, and collaborative optimization of the comprehensive performance of the magnet is achieved.

This invention discloses a method for analyzing the fracture surface of high-Cr steel or alloy steel that cracks in a high-temperature environment. The method involves cutting a metallographic sample at the crack tip of a crack-containing block, polishing it, visually observing the crack morphology, and analyzing the composition of corrosion products on the sample. The sample is then etched with an etchant, and the relationship between the crack direction and the microstructure of the sample is observed under a metallographic microscope to obtain the crack metallographic test results. The remaining crack in the crack-containing block is opened, and the macroscopic features of the fracture surface are visually observed. The microscopic features of different regions of the fracture surface are observed using a scanning electron microscope, and the composition is tested to obtain the micro-region composition. The surface corrosion of the fracture surface is removed using an electrostatic descaling method, and the microscopic features of different regions of the fracture surface are observed under a scanning electron microscope. Based on the crack metallographic test results, the macroscopic and microscopic features of the fracture surface, and the micro-region composition, the cause of the cracking is determined. This invention provides a complete analytical procedure, yields abundant information, and effectively analyzes the causes of component cracking.

The invention relates to the technical field of material surface corrosion prevention, in particular to a spraying method for a heavy anti-corrosion coating of a port steel structure. The method comprises the following steps that (1) sand blasting derusting treatment is conducted on a steel structure base body, so that the cleanliness of the steel structure base body reaches the Sa2.5 level, and the roughness is controlled to range from 40 micrometers to 75 micrometers; 2) coating the treated substrate with epoxy zinc-rich primer, and doping graphene modified zinc powder accounting for 1-3% of the total mass of the primer to form a primer layer with a dry film thickness of 60-80 [mu] m; (3) after the primer layer is cured, the primer layer is coated with epoxy micaceous iron oxide intermediate paint, aluminum tripolyphosphate accounting for 2-5% of the total mass of the intermediate paint is further added into the epoxy micaceous iron oxide intermediate paint, and an intermediate paint layer with the dry film thickness being 150-200 microns is formed; 4, the middle paint layer is coated with weather-resistant finish paint, and a finish paint layer with the dry film thickness being 60-80 microns is obtained.According to the method, the adhesive force, chloride ion permeation resistance, salt fog resistance (larger than or equal to 3000 hours) and weather resistance of the coating are remarkably improved, the method is suitable for the harsh marine environment, and the service life of the steel structure can be prolonged to 20 years or above.

The invention discloses a surface corrosion-resistant invar alloy precision strip for a liquid cargo cabin of a liquefied natural gas carrier and a manufacturing method. The surface corrosion-resistant invar alloy precision strip comprises the following components: 35.6%-37.1% of Ni, 0.35%-0.80% of Si, 0.05%-0.10% of Ce, 0.015%-0.030% of C, less than or equal to 0.35% of Mn, 0-0.0008% of O, less than or equal to 0.01% of N, less than or equal to 0.003% of S, less than or equal to 0.005% of P, less than or equal to 0.20% of Cr, less than or equal to 0.20% of Cu, less than or equal to 0.05% of Al, less than or equal to 0.003% of Ti and the balance of iron and inevitable impurity elements. According to the formula, through EAF, AOD, LF, continuous casting or die casting, hot continuous rolling or solid solution pickling after forging, cold rolling in multiple rolling processes, annealing and protective film prefabrication treatment, the temperature range of the prepared material is about 1.5-1.8 * 10 <-6 > / DEG C from-163 DEG C to 20 DEG C, the yield strength Rp0.2 value is larger than or equal to 300 MPa, the tensile strength Rm value is larger than or equal to 480 MPa, the ductility A50 is larger than or equal to 35%, surface corrosion does not occur within the machining period or storage and transportation time of 15 days under the conventional condition, and the service life of the material is prolonged. And particularly, the risk of surface rusting in the processing, storage and transportation processes is greatly reduced.

The invention relates to the technical field of processing, testing or inspection of aircraft parts, and provides a surface corrosion evaluation method for an aluminum alloy plate with an epoxy coating, which comprises the following steps: acquiring an aluminum alloy plate sample with an epoxy coating at different time after being exposed in a coastal atmospheric environment, collecting two-dimensional closed corrosion area image data of the surface of the sample, and calculating the surface corrosion of the aluminum alloy plate with the epoxy coating according to the two-dimensional closed corrosion area image data; processing the image to extract a closed boundary of the corrosion area; calculating the boundary length of the corrosion area and the included corrosion area, and calculating the fractal dimension of the corrosion area based on the length and the area; according to the method, the correlation model between the fractal dimension of the corrosion area and the exposure corrosion time is established, the interval distribution of the fractal dimension under different corrosion time is determined, the method is used for evaluating the corrosion state and the development trend of the corrosion state, the limitation of parameter evaluation modes such as subjective judgment and single corrosion depth is avoided, and the accuracy and objectivity of a corrosion evaluation result are effectively improved.

The invention provides a treatment method for synergistically enhancing the comprehensive performance of a neodymium-iron-boron magnet, and belongs to the technical field of magnetic materials. According to the method, a heavy rare earth layer and a corrosion-resistant metal layer such as copper, nickel and cobalt for promoting grain boundary diffusion of heavy rare earth are respectively deposited on the surface of the neodymium-iron-boron magnet by adopting a multi-layer electroplating method, the coercivity of the neodymium-iron-boron magnet is enhanced through grain boundary diffusion, and the corrosion resistance of the magnet is enhanced through a nickel-cobalt coating. The treatment method comprises the following steps: carrying out electrochemical deposition on the neodymium-iron-boron magnet in a heavy rare earth metal plating solution, and then respectively electroplating a copper plating layer and a nickel-cobalt plating layer to obtain a heavy rare earth-containing plating layer with strong corrosion resistance and good plating film binding force; the neodymium-iron-boron magnet containing the heavy rare earth coating is subjected to heat treatment, and the coercive force of the magnet is improved through heavy rare earth grain boundary diffusion. The neodymium iron boron grain boundary diffusion process and the surface corrosion prevention process are subjected to integrated treatment, the technological process of high-performance neodymium iron boron industrial preparation is shortened, and the coercive force and the corrosion resistance of the magnet are comprehensively enhanced.

The invention discloses a steel wire surface corrosion identification method based on deep learning, and the method comprises the steps: firstly collecting an image, carrying out the preprocessing of the image, building a data set, and then building an improved U-Net model, introducing an SE attention mechanism, inserting an SE module at the tail end of each encoder block, enhancing the network channel selectivity, carrying out the optimization of an up-sampling structure, and carrying out the recognition of the surface corrosion of a steel wire. The transpose convolution of the original Unet is replaced, and a semantic alignment module is introduced at a jump joint to carry out channel matching and fusion, so that semantic deviation is reduced; and then carrying out model training, evaluation, storage, deployment and reasoning. By fusing the deep learning algorithm, the steel wire surface image is intelligently analyzed, the corrosion type is accurately recognized, the corrosion area, depth and other indexes are quantitatively evaluated, the limitation of a traditional detection means in a complex environment is broken through, and real-time and efficient monitoring of steel wire corrosion is achieved.

The invention relates to the technical field of rare earth permanent magnet materials, in particular to a preparation process of a core-shell structure enhanced neodymium iron boron magnet. Through a multi-component composite formula of high-abundance rare earth and a small amount of heavy rare earth and in combination with a magnesium interface catalytic pretreatment and grain boundary diffusion technology, a Dy-rich shell layer is formed on the surface of a main phase grain, a core-shell structure is constructed, and the coercivity and the high-temperature stability are remarkably improved. An integrated continuous production technology is adopted in the preparation process and comprises the steps of vacuum melting, continuous ingot casting, jet milling, magnetic field forming and continuous sintering, laser-electrochemical integrated machining is integrated, and high-precision cutting and surface corrosion prevention are achieved. The invention further relates to special equipment, such as a multi-zone intelligent temperature control vacuum sintering furnace and double-shaft stirring-composite magnetic field powder equipment, so that the temperature uniformity and the powder orientation degree are ensured. According to the process, heavy rare earth dependence is reduced, the coercive force reaches 24 kOe or above, the high-temperature magnetic performance attenuation is smaller than or equal to 5%, the production cost is reduced, the efficiency is improved, and the process is suitable for the fields of motors, electronics and the like.

The application discloses a marine aluminum alloy plate oil immersion corrosion test method and device and a sample. A 50mm*50mm*4mm sample is processed on a marine aluminum alloy plate, and after surface treatment, the sample is placed in a special oil solution with a special ratio. Different test immersion periods are set. In the test process, a potentiometer is used to collect the potential change of the test sample. After the test, the average corrosion rate of the sample is calculated by the weight loss method, and the sample surface corrosion pit depth information is measured by a microscopic method, so that the corrosion evaluation of the marine aluminum alloy plate in the oil environment is realized. The application provides an evaluation method for the corrosion of the aluminum ship alloy plate in the oil environment. The method has high practical utility, is simple to operate, and can be popularized and used in the industry.

The present application relates to the technical field of electronic packaging materials, and particularly relates to a thick copper packaging circuit board capable of resisting high-salt mist corrosion and a preparation method thereof, which comprises the following steps: S1: preparing a glass fiber-BT resin composite core layer for standby; S2: preparing a fluorine-modified polyimide packaging coating solution for standby; S3: preparing a surface corrosion-resistant composite coating for standby; S4: bonding the thick copper foil and the glass fiber-BT composite core layer to obtain a thick copper conductor; S5: applying the fluorine-modified polyimide packaging coating solution to the surface of the thick copper conductor layer to form a packaging layer; S6: spraying the corrosion-resistant coating on the surface of the packaging layer to form a composite corrosion-resistant coating; and S7: performing overall curing and hot pressing to finally obtain a thick copper packaging circuit board product. According to the present application, a multi-layer synergistic protection structure is constructed and the preparation process is optimized, so that the corrosion resistance and structural stability of the thick copper circuit board in a high-salt mist environment are significantly improved.

The disclosure provides a composition including a corrosion inhibitor compound and an iron chelating agent. The composition may be used in a method of inhibiting corrosion of a metal surface. The method includes adding the composition to an aqueous system that includes the metal surface. The composition may be applied to the metal surface, for example, using batch treatment techniques.

The invention discloses a phased array detection process and verification method of a gas production tree drift diameter flange sealing surface simulation test block, and relates to the technical field of petroleum and natural gas wellhead device detection, and the phased array detection process comprises the following steps: S1, obtaining a test block design reference; s2, obtaining sound velocity parameters and baseline echo data; s3, obtaining a scanning parameter table matched with the defect type; s4, obtaining a TCG calibration curve and gain setting for detection; s5, obtaining original time sequence echo data and imaging data; s6, generating a final detection result and a verification report; according to a defect type scanning scheme, 100% detection of sealing surface corrosion and bolt hole transverse and longitudinal cracks is realized, and no detection blind area exists; the quantitative precision is high, specifically, the defect quantitative error is controlled within + / -1.1 mm through targeted TCG calibration, and the precision is improved by 40% compared with that of a conventional process; based on a standardized verification process of a fixed model test block, different operators use the same equipment for detection, and the data variation coefficient is less than or equal to 5%; and the adaptability is high.

The application discloses an evaporator steel wire shelf phosphating and plastic dipping integrated treatment device and belongs to the shelf processing field. The evaporator steel wire shelf phosphating and plastic dipping integrated treatment device comprises a plastic dipping tank and a phosphating tank, a heating channel is arranged between the plastic dipping tank and the phosphating tank, a conveying assembly is arranged above the plastic dipping tank, a liquid receiving disc is arranged at the bottom of the conveying assembly, a flow stabilizing assembly is arranged in the liquid receiving disc, and splash-proof assemblies are arranged on the two sides of the liquid receiving disc. The liquid receiving disc is integrally suspended at the bottom of the conveying assembly, and the liquid receiving disc can receive and collect mechanical lubricating grease and residual processing liquid dripping from the mechanical moving components above, so that the fluidized plastic powder in the plastic dipping tank is effectively prevented from being damped and caked or chemically deteriorated due to the dripping of the fluid downward, the pinholes, the immersion blind spots and the subsequent rust hidden dangers of the shelf surface coating caused by the dripping pollution are completely eliminated, and the surface corrosion prevention quality and the yield of the medical equipment are remarkably improved.

The utility model discloses high-temperature heat treatment equipment with good corrosion resistance, and relates to the technical field of heat treatment, the high-temperature heat treatment equipment comprises a heat preservation box body and a heat preservation door body, the heat preservation box body and the heat preservation door body are connected through hinges, and a plurality of supporting structures are mounted on the lower wall surface in the heat preservation box body; the lower wall faces of the heat preservation box body and the heat preservation door body are provided with blocking structures, and the upper wall face of the heat preservation box body is provided with an exhaust structure. According to the utility model, oxygen isolation can be realized in a heating stage, a heat preservation stage and a cooling stage of heat treatment until heat treatment is finished, and the surface of a metal workpiece can be ensured not to be in contact with oxygen, so that the condition of surface corrosion of the metal workpiece is avoided, and the quality of metal heat treatment is improved; and the function of temperature feedback linkage is realized, and parameters such as time, air pressure, temperature and the like can be adjusted according to specific heat treatment conditions, so that smooth metal heat treatment is ensured.

The present invention discloses a zirconium-based fuel cladding surface corrosion-resistant interface integrated Zr x O / SiC multilayer composite coating and preparation method thereof, the method comprising: first, pre-oxidizing the zirconium-based fuel cladding to in-situ grow Zr x O oxide film; second, Ar plasma sputtering activation of the pre-oxidized zirconium-based fuel cladding; third, alternating deposition to form a multi-layered SiC composite coating. The present invention combines pre-oxidation with magnetron sputtering deposition, and constructs a Zr in situ growth from the matrix Zr x O and then to the gradient composite structure coating of the surface SiC composite coating, which reduces the thermal mismatch and interface thermal resistance between the base metal and the ceramic coating, enhances the interface adaptability between the base and the SiC composite coating, and with the help of the high corrosion resistance, high thermal conductivity and high hardness of the SiC composite coating, the surface corrosion resistance and wear resistance of the fuel cladding under normal and accident conditions are improved simultaneously, and the fault tolerance of the zirconium-based cladding under accident conditions is optimized.

The application discloses a modified ferruginous mineral material for improving wear resistance and corrosion resistance of cement and a preparation method of the modified ferruginous mineral material, and raw materials include calcium components 40-70%, aluminum components 5-30%, ferruginous components 5-30% and active regulators 0-5% in percentage of mass. The modified ferruginous mineral material for improving wear resistance and corrosion resistance of cement can significantly improve cement chloride solidification capacity, wear resistance, reduce the probability of steel surface corrosion by chloride ions, and achieve the purposes of steel corrosion prevention and cement wear resistance in reinforced concrete when the modified ferruginous mineral material is added into cement as admixture.

The utility model discloses an alloy pipe surface corrosion-resistant treatment device, which relates to the technical field of alloy pipe processing, and comprises a treatment box body and supporting legs arranged at the bottom of the treatment box body, and further comprises a spraying assembly, a drying assembly, a transmission assembly and a stirring assembly. According to the utility model, the treatment liquid is uniformly sprayed on the surface of the alloy pipe through the spraying assembly, so that compared with a traditional soaking mode, the treatment liquid can be fully and uniformly contacted with the surface of the pipe, the uniformity of corrosion-resistant treatment on the surface of the alloy pipe is effectively improved, and the overall corrosion resistance is improved; the drying assembly of the equipment can enable hot air flow to continuously act on the alloy pipe through the fan, so that residual treatment liquid on the surface of the alloy pipe is quickly blow-dried, and adverse effects of the residual treatment liquid on subsequent processing and use are avoided.

The application discloses a kind of corrosion-resistant magnesium alloy with self-repair protection and preparation method thereof, it is related to magnesium alloy technical field, the mass percentage content of each component of the corrosion-resistant magnesium alloy includes: Al: 6-15%;Mn: 0.01-0.3%;Y: 0.1-2%;Cd: 0-0.1%;Be: 0-0.1%;The rest is Mg and unavoidable impurities.By adding trace alloying elements to control the organization, with the help of dense passivation oxide film formed on the surface of alloy matrix, to inhibit the corrosion failure problem caused by the damage of matrix surface film layer to pitting or surface corrosion, under long time neutral salt solution environment, when local corrosion occurs on the surface of magnesium alloy matrix, the protection of autogenous passivation film can prevent the corrosion medium from continuing to expand to the inside of matrix, and the formation of multiphase in the organization is avoided as much as possible, and the number of primary cell is reduced, so as to reduce electrochemical corrosion.

The utility model discloses surface anti-corrosion spraying equipment which comprises a device shell, two baffles are fixedly connected to the inner wall of the device shell, and a collecting hopper is fixedly connected to the inner wall of the device shell. According to the surface anti-corrosion spraying equipment provided by the utility model, the transmission roller in the middle can be driven to rotate by starting the driving motor, and the other transmission rollers are driven to rotate by the corresponding chain wheel and the protective shell, so that ferrous metal can be placed on the transmission rollers, and the rotating transmission rollers drive the ferrous metal to enter the middle part of the device shell; in the process that conveying rollers drive the ferrous metal to move, rotation of the middle conveying roller drives a large belt wheel to rotate along with the conveying rollers, then a small belt wheel rotates along with the large belt wheel through a belt, and then anti-corrosion liquid in an anti-corrosion liquid box can be stirred through a connecting rod and stirring blades; the situation that the follow-up anti-corrosion effect is poor due to the fact that components in sprayed anti-corrosion liquid are not evenly distributed is reduced.

The utility model discloses a device for detecting the corrosion resistance of a building material, and belongs to the technical field of corrosion resistance detection. A building material corrosion resistance detection device comprises a work box, the work box is divided into a cleaning cavity and a detection cavity through a partition plate, a detection mechanism is arranged in the detection cavity, the building material corrosion resistance detection device further comprises an installation disc rotationally connected in the cleaning cavity, a guide rod is fixedly connected in the cleaning cavity, an installation base is slidably connected to the guide rod, and a detection mechanism is arranged in the detection mechanism. A cleaning roller is rotationally connected to the mounting base, and a driving part is arranged on the working box and used for driving the mounting disc to rotate; the liquid spraying assembly is arranged on the mounting base, and when the mounting disc rotates, the spraying end of the liquid spraying assembly sprays liquid towards the outer wall of the sample; according to the device, the cleaning efficiency can be greatly improved, the corrosion on the outer wall of the steel bar can be quickly and uniformly removed through physical friction and the chemical action of the cleaning agent, the actual metal corrosion degree is prevented from being covered by the surface corrosion, and the subsequent detection precision is improved.

The invention discloses a cyclic load and electrochemistry collaborative testing device and a testing method, and belongs to the technical field of material corrosion and mechanical property testing. The device comprises a load applying unit, an electrochemical testing unit, a sample clamp and corrosion pool unit and a data synchronization control module. The test method comprises the steps of sample preparation, device assembly, static electrochemical test and electrochemical collaborative test under cyclic load. The core of the invention lies in that through the data synchronization control module, the electrochemical test is accurately controlled to be triggered when the cyclic load reaches a peak value, and in-situ and synchronous coupling of a dynamic stress field and a corrosion environment is realized. According to the method, the defect that fatigue and corrosion tests are separated in the prior art is overcome, the complex working condition of the material in actual service can be truly reduced, the acceleration or inhibition effect of cyclic stress on the surface corrosion behavior of the material is accurately represented, and the research and evaluation precision of the corrosion fatigue performance and failure mechanism of the material is remarkably improved.

The utility model relates to the technical field of power transmission facility protection, in particular to a concrete pole surface corrosion-resistant treatment device which comprises a supporting frame, a plurality of universal wheels are arranged at the bottom of the supporting frame, spraying pipes are arranged on the supporting frame in a surrounding mode, and a water pump is installed on the side face of the supporting frame. The spraying pipe is connected and communicated with the output end of the water pump, and the input end of the water pump is connected and communicated with a telescopic corrugated pipe. Through the arrangement of the spraying pipe, the water pump and the telescopic corrugated pipe, uniform and all-dimensional spraying on the surface of the concrete pole can be achieved, the problem that the thickness of a coating is not uniform possibly occurring in a traditional manual spraying mode is solved, and therefore the quality and the protection effect of an anti-corrosion layer are greatly improved; and the concrete pole can be immediately heated and dried after spraying is completed, the curing speed of the corrosion-resistant coating is greatly increased, the waiting time is shortened, and the working efficiency is improved.

The invention discloses a finite element shell element model modeling method and system considering metal surface corrosion random morphology. The method comprises the following steps: obtaining metal surface corrosion morphology three-dimensional point cloud data of a corroded component through three-dimensional laser scanning; performing dimension reduction on the three-dimensional point cloud data, judging whether the corrosion form of the metal surface is uniform corrosion or not, if so, calculating a physical regression equation based on the expanded point cloud data, and constructing a corrosion random morphology model based on superposition of a corresponding uniform corrosion depth on a corrosion texture generating a corresponding weight loss ratio; if not, constructing a corrosion random morphology model based on the learned corrosion texture; generating a corrosion morphology by using the corrosion random morphology model; performing regular grid division and numbering operation on the corrosion random morphology model; material attribute endowing is completed based on grid partitioning and numbering, and grid encryption division is carried out; and based on the shell element geometric model with the given thickness, parameter setting is completed, and a finite element shell element model is obtained.

The utility model relates to steel pipe processing technical field, and disclose a kind of steel surface cleaning mechanism in steel pipe processing process, including rack, the middle part of support is fixedly installed with servo motor, the output shaft one end of servo motor and located in rack is all provided with reciprocating transmission assembly driven by servo motor, and the left and right ends of the reciprocating transmission assembly are all provided with cleaning assembly for rubbing and scraping off rust and other impurities on steel surface, the left and right sides of the rack are all fixedly installed with support plate, and the end of support plate is provided with wiping assembly for wiping steel surface;Through the rotation of carousel, it will drive rotating column synchronous rotation, and then it will drive rotating column extrusion back to the inner wall of frame, and then it will make back to the frame back and forth push-pull reciprocating slide rod, so it will drive the mounting seat of both sides synchronous back and forth movement, and then it will drive the friction plate clamped on the both sides of steel surface back and forth sliding and clean its surface corrosion, to achieve cleaning effect.

The utility model relates to the technical field of ship hydraulic control equipment, in particular to a modularized integrated control valve group for a ship hydraulic clutch. The device comprises a main valve group, a first functional module valve group, a second functional module valve group, a third functional module valve group and a top plate are sequentially arranged above the main valve group, and the first functional module valve group and the third functional module valve group are the same in internal structure; according to the utility model, a modularized sandwich valve group framework is adopted, and standardized valve block units are superposed on the basis of a main oil inlet valve block, so that a main valve block does not need to be redesigned when a module is newly added, a control loop can be expanded only by increasing or decreasing the standardized units, and the volume and complexity of multi-path control are remarkably reduced; aiming at a ship high-salt-fog environment, the valve block base material is made of high-strength aluminum alloy and adopts the zinc-plated nickel alloy composite coating, the surface corrosion resistance is improved through the electroplating and passivation dual process, and meanwhile, the salt-fog-resistant elastic sealing ring is used, so that the leakage risk caused by corrosion is reduced.

The invention discloses a solid waste filling method based on cooperation of an MICP technology and carbon dioxide mineralization. Gangue aggregate is treated through microbial infiltration; cO2 is introduced into the alkaline solid waste for carbonation treatment, so that the alkalinity of the alkaline solid waste is reduced, and CO2 is absorbed and cured; the microbe modified aggregate and the mineralized solid waste slurry are fully mixed according to a reasonable ratio to form the filling slurry with stable performance. After the slurry is injected into the goaf, calcium carbonate is formed through induction of the MICP technology, calcium carbonate crystals are further generated, internal pores of the material are effectively filled, and the compactness and certain mechanical performance of the grouting body are enhanced. The method can synchronously and efficiently solve the problem of treatment of solid wastes such as coal gangue and fly ash, realizes large-scale storage of CO2, provides a filling body with excellent mechanical properties for a goaf, enhances the surface corrosion resistance and improves the bonding property with surrounding rock.

The present disclosure relates to a nickel plated steel sheet for a battery case having excellent corrosion resistance and a method for manufacturing the same. In one embodiment, the nickel plated steel sheet comprises: a base steel sheet; a nickel plating layer formed on one or more surfaces of the base steel sheet; and a nickel-iron (Ni—Fe) diffusion layer formed between the base steel sheet and the nickel plating layer; wherein the nickel plating layer and the nickel-iron (Ni—Fe) diffusion layer are formed by forming an electro-nickel plating layer on the base steel sheet and an electroless nickel plating layer on at least a portion of the surface of the electro-nickel plating layer, followed by heat treatment, and the nickel plating layer includes one or more co-deposited elements selected from phosphorus (P), boron (B), tungsten (W), cobalt (Co), molybdenum (Mo), and copper (Cu) on its surface.