173 results about "Acid corrosion" patented technology

The invention discloses a preparation process of carboxylated shell-based activated carbon for organic matter adsorption, and particularly relates to the technical field of adsorption materials, and the preparation process comprises the following steps: mixing coconut shell powder and walnut shell powder, crushing, and loading potassium hydroxide in stages in a gradient manner; carrying out two-stage microwave activation in an inert atmosphere, namely low-temperature pre-activation in the first stage and high-temperature activation in the second stage, and introducing carbon dioxide; the activated product, phosphoric acid, a laccase-peroxidase complex enzyme preparation and a buffer solution are subjected to ultrasonic synergistic modification, and then a weak acid reaction is maintained through dynamic pH regulation and control; and finally, performing graded washing and gradient drying to obtain a finished product. According to the method, high-density carboxyl grafting and graded pore construction are synchronously realized under mild conditions through a synergistic effect of directional catalysis of biological enzyme and dynamic regulation of microwave, so that the problems of structural damage caused by strong acid corrosion, pore imbalance caused by fixed parameters and stability reduction caused by insufficient post-treatment in a traditional process are solved; the adsorption performance and the regeneration cycle performance of the material are also obviously improved.

The specific embodiment of the invention provides an anti-rust coating and a coating, the anti-rust coating comprises a water-based rust conversion agent and a water-based epoxy coating, the water-based rust conversion agent comprises a water-based acrylic emulsion and ammonium polyacrylate salt, the pH value of the water-based rust conversion agent is 6-8, Fe < 3 + > is converted into a stable complex in situ through a carboxyl chelation reaction, and the stable complex is added into the water-based epoxy coating. The water-based rust conversion agent and the epoxy coating have the advantages that the water-based rust conversion agent is added into the water-based epoxy coating, the continuous acid etching risk of a matrix is avoided, the water-based epoxy coating comprises polydopamine grafted and coated silicon dioxide, micropores can be reduced by the coating, permeation of water, oxygen and chloride ions can be inhibited, hydrolytic stripping and secondary corrosion can be prevented, and the water-based rust conversion agent and the epoxy coating have good compatibility; the formed coating is excellent in interlayer adhesive force and compact and firm in film layer, and the long-acting protection requirement in a severe corrosion environment can be met when the anti-rust coating is used for coating corrosion prevention of a steel member.

Methods for treating a subterranean formation with a treatment fluid comprise introducing the treatment fluid into a wellbore extending into a subterranean formation, measuring a surface treating pressure, changing a concentration of the friction reducer to have at least two surface treating pressure measurements within a surface treating pressure range, establishing a relationship between the surface treating pressure measurements and the concentrations of the friction reducer, evaluating a friction reducer efficiency, and selecting the friction reducer with the best efficiency for a next stage of a multistage fracturing job. The treatment fluid includes water, an acid, a corrosion inhibitor, and a friction reducer.

The invention provides an acid-corrosion-resistant low-carbon seamless steel pipe thickness measuring device, and particularly relates to the technical field of steel pipe thickness metering, the acid-corrosion-resistant low-carbon seamless steel pipe thickness measuring device comprises a middle-position laser head and at least one side-position laser head, the middle-position laser head and the side-position laser head are used for detecting the wall thickness of a plurality of to-be-measured pipes arranged in groups, and a motion platform is arranged outside a laser thickness measuring assembly; according to the thickness measuring device for the acid-corrosion-resistant low-carbon seamless steel pipe, the laser thickness measuring assembly is driven by the motion platform to move in the arrangement direction, the axial direction and the vertical direction of the steel pipe; the problems that in the prior art, a feeding separation mechanism needs to be additionally arranged, and feeding time is long and equipment cost is high due to the fact that steel pipes are conveyed one by one are solved, it is achieved that the bundled steel pipes can be detected in place, additional operation such as separation and single feeding of the steel pipes is not needed, feeding time and equipment input cost are greatly reduced, and the production efficiency is improved. And meanwhile, stable basic positioning support is provided for batch detection, and the detection flexibility and adaptability are improved.

The application relates to the technical field of sodium ion batteries, and particularly discloses a negative electrode sheet based on an anodic aluminum foil and a preparation method thereof, which comprises: a honeycomb-shaped porous current collector including a pure aluminum foil layer and a nano-porous aluminum oxide layer, wherein the nano-porous aluminum oxide layer is obtained by sequentially performing anodic oxidation and acid corrosion on the aluminum foil current collector; a first coating layer, which is a high-specific-energy phosphorus-doped material and is embedded in the porous structure of the nano-porous aluminum oxide layer; and a second coating layer, which is made of hard carbon material and is coated on the first coating layer. In the application, the aluminum foil is treated by anodic oxidation to obtain a honeycomb-shaped nano-porous aluminum oxide layer, and then the thickness and pore size of the oxide layer are regulated by acid corrosion treatment, so that the surface roughness of the aluminum foil is improved, the adhesion between the electrode sheet and the current collector is improved, and the volume expansion of the phosphorus-based material is inhibited through the embedding design of the first coating layer, thereby improving the cycle stability and safety of the battery.

The invention provides a universal method for improving activity and stability of a NiFe-based catalyst and application of the universal method, and relates to the technical field of clean energy and new materials.The method comprises the steps that 1, NiFe-based catalyst dispersion liquid with a certain concentration is prepared to serve as a solution A; preparing an organic phosphonic acid corrosion inhibitor diluted solution with a certain concentration as a solution B; and step 2, uniformly mixing the solution A and the solution B, adding a certain amount of a binder, and carrying out high-speed shearing and / or high-pressure homogeneous dispersion to obtain the uniform and stable final slurry. The organic phosphonic acid corrosion inhibitor is used for modifying the NiFe-based catalyst, so that a strong and effective chelation protection layer is formed on the surface of the NiFe-based catalyst, the catalytic activity and stability of the NiFe-based catalyst are improved conveniently, the method is simple and convenient in process and compatible with an existing electrode manufacturing process, the high oxygen evolution activity of the catalyst can be maintained, and meanwhile the catalytic activity and stability of the NiFe-based catalyst are improved. And the long-term running durability of the device is greatly improved, and the device is suitable for a high-performance and long-service-life AEM water electrolysis hydrogen production system and an OER test.

This invention relates to the field of coating technology, specifically to a protective coating for stone surfaces with good waterproof performance and its preparation method, comprising the following steps: S1. Treating microcrystalline cellulose to obtain product 1 for later use; S2. Reacting product 1 from step S1 with titanium tetrachloride to obtain nano-titanium dioxide for later use; S3. Mixing the nano-titanium dioxide from step S2 with sodium oleate and adjusting the pH to 6.5-7.5 to obtain product 2 for later use; S4. Performing surface synergistic hydrophobic modification treatment on product 2 to obtain functional filler. This invention discloses a protective coating for stone surfaces with good waterproof performance, using fluorinated acrylic resin as the base resin, incorporating functional filler, and combining it with a curing agent, mixed solvent, defoamer, and leveling agent. Through the synergistic effect between the components, this protective coating for stone surfaces possesses good waterproof performance as well as good resistance to ultraviolet aging and acid corrosion.

The invention discloses an anti-corrosion composite coating for an ammonia gas engine, relates to an anti-corrosion technology for an ammonia gas fusion engine, and solves the technical problem that the reliability, durability and commercialization process of an ammonia fuel engine are restricted by the existing engine material system and protection technology. The composite coating comprises a base material arranged on the surface of the ammonia gas engine component; the base material layer is adjacent to the base material layer, is arranged on the surface of the base material and is used for resisting ammonia-alkali corrosion; the middle transition layer is arranged on the surface of the adjacent base material layer and is used for component gradient transition and stress relief; and the outermost surface layer is arranged on the surface of the middle transition layer and is used for resisting acid corrosion and pitting corrosion. The invention further discloses an intelligent corrosion prevention system and method for the ammonia gas engine. The invention solves the problem of limited protection performance of the traditional single coating.

The utility model discloses etching equipment. The etching equipment comprises a vacuum infiltration device which comprises an infiltration tank and a vacuum mechanism, wherein the vacuum mechanism is connected with the infiltration tank and is used for vacuumizing the infiltration tank; in the alkali corrosion device, a first temperature control assembly is used for controlling alkali liquor in an alkali liquor tank to be at a preset first temperature value, and a first bubbling assembly is used for generating bubbles in the alkali liquor; and / or the acid corrosion device comprises an acid liquor tank, a second temperature control assembly and a second bubbling assembly, the second temperature control assembly is used for controlling the temperature value of the acid liquor in the acid liquor tank not to exceed a preset second temperature value, and the second bubbling assembly is used for generating bubbles in the acid liquor; and the carrying device is used for carrying the materials treated by the vacuum infiltration device to at least one of the alkali corrosion device and the acid corrosion device. Through the mode, the etching equipment provided by the utility model can customize the optimal wet etching process adaptive to the glass substrate based on requirements, and can greatly improve the pore-forming efficiency of the glass substrate.

The present application relates to the technical field of splicing film, and particularly discloses a multi-color splicing film, which comprises a polyurethane outer film layer and a modified base film layer, wherein the modified base film layer is impregnated with a modified coordination compound liquid and then formed into the multi-color splicing film through a double-layer co-extrusion casting machine. The multi-color splicing film is improved in raw materials and process through the modified base film layer, and then impregnated with the modified coordination compound liquid. Finally, the multi-color splicing film is formed through the double-layer co-extrusion casting machine. The product has excellent elongation at break, excellent heat resistance, and excellent acid corrosion resistance.

The invention provides a display mother board, display panels and a display device.The display mother board comprises a plurality of display panels, each display panel comprises a substrate, a driving circuit layer, a light-emitting device layer and a packaging layer which are arranged in a stacked mode, a blocking structure is arranged on the side, close to the packaging layer, of each substrate, and the blocking structures are arranged around the display panels; the substrate comprises an etching area used for selective laser etching, and the etching area is located on the outer side of the display panel; an etching shielding layer is arranged on the side, close to the packaging layer, of the substrate, located on the periphery of the display panel and covers the etching area and the corresponding blocking structure. The display mother board, the display panel and the display device are simple in structure and convenient to manufacture, the problem of acid leakage corrosion can be effectively solved, and the product effect is ensured.

The application provides a proton exchange membrane fuel cell catalyst and a preparation method thereof. The application is characterized in that a F-treated Pt x Co y nanoparticle is uniformly loaded on the surface of a F-treated carbon carrier, and the atoms on the surface of the catalyst are rearranged through heat treatment, so that a proton exchange membrane fuel cell catalyst with a surface rich in Pt is obtained. The catalyst has good dispersity, obvious Pt and Co enrichment characteristics, the surface enrichment of Pt is beneficial to improving the utilization rate of Pt atoms, thereby improving the mass specific activity of the noble metal of the catalyst, the surface enrichment of Co is beneficial to surface modification and improving the electrochemical stability of the nanoparticle, the addition of F significantly improves the dependence of the proton exchange membrane on water, and the catalyst and the carrier have strong hydrophobicity, which can effectively reduce the corrosion of water and acid on the catalyst, has strong acid corrosion resistance, good catalytic activity, good cycle performance and long service life.

The application discloses a kind of corrosion and scale inhibitor sulfur removal agent and preparation method thereof, belong to sulfur removal agent technical field, by weight parts including following components: hydroxyl alkyl amine modified triazine compound 30~60 parts, polyaspartic acid scale inhibitor 10~25 parts, sodium gluconate 5~15 parts, ethylenediamine tetramethylene phosphonic acid sodium 3~10 parts, organic phosphonic acid corrosion inhibitor 2~8 parts and water 20~40 parts;The hydroxyl alkyl amine modified triazine compound is prepared by triazine sulfur removal agent and N-methyl diethanolamine or diethanolamine under 50~80 ℃ for 2~4 hours, wherein the molar ratio of triazine sulfur removal agent and hydroxyl alkyl amine is 1:0.3~0.8.The application is prepared by using hydroxyl alkyl amine modified triazine compound as core sulfur removal component, triazine sulfur removal agent and N-methyl diethanolamine or diethanolamine are reacted under specific temperature and time, which greatly improves the capture activity and reaction rate of hydrogen sulfide, and improves water solubility and dispersibility, realizes efficient sulfur removal.

The application provides a multi-core optical fiber coupling connection method, taking a multi-core optical fiber, using an HF acid corrosion solution to gradually corrode each multi-core optical fiber core from the end face of the multi-core optical fiber to form a plurality of multi-core optical fiber core corrosion holes; taking a single-mode optical fiber, using the HF acid corrosion solution to corrode the cladding of the single-mode optical fiber from the outside to the inside to the outer wall of the single-mode optical fiber core to form a plurality of single-mode optical fiber bare cores; inserting each single-mode optical fiber bare core into each multi-core optical fiber core corrosion hole, and making the end face of the single-mode optical fiber bare core abut against the end face of the multi-core optical fiber core at the bottom end of the multi-core optical fiber core corrosion hole; filling a solidified glue into the multi-core optical fiber core corrosion hole, and waiting for the solidified glue to completely solidify, thereby solving the problem of coupling connection of the split single-mode optical fiber core and the multi-core optical fiber.

The invention relates to a natural gas boiler flue gas waste heat deep recovery and condensate water treatment process in the technical field of natural gas boilers. The process comprises the steps of flue gas primary cooling, flue gas deep condensation, condensate water collection and neutralization, condensate water purification and recycling, and waste heat comprehensive utilization and intelligent control. Through heat exchange, the temperature of flue gas is reduced to 80-100 DEG C, the water inlet temperature of the boiler is increased, the heating energy consumption of the boiler is reduced, and the heat efficiency of the boiler is improved by about 5-8%; the cooled flue gas enters a high-efficiency condenser, so that the temperature of the discharged flue gas is reduced to be below the dew point, and the energy-saving rate can be increased by 15%; condensate water is collected and neutralized, an alkaline neutralizer is added, the acid corrosion risk is eliminated, follow-up pipelines and equipment are protected, the neutralized condensate water is divided into two paths after suspended solids are removed, one path is conveyed to a boiler softened water tank, the other path is used for cooling system supplementary water or plant miscellaneous water, dependence on municipal water supply is reduced, and the energy-saving and environment-friendly effects are achieved. And gradient utilization of water resources is realized, 1 ton of raw water is saved for recycling each ton of condensate water, and wastewater discharge is reduced.

The invention relates to a sample processing method for characterizing the doping state of a barium titanate-based MLCC dielectric ceramic microcell. The sample treatment method for characterizing the doping state of the barium titanate-based MLCC dielectric ceramic micro-area comprises the following steps: (1) pre-treating the barium titanate-based MLCC dielectric ceramic to obtain a sample of which an internal effective doping area is exposed; (2) soaking the sample of which the internal effective doped region is exposed in an acid solution for acid corrosion, and then cleaning and drying to obtain a sample subjected to acid corrosion; and (3) depositing a conductive layer on the surface of the sample subjected to acid corrosion to obtain the sample for characterizing the doping state of the barium titanate-based MLCC dielectric ceramic microcell for characterization testing.

The invention relates to the technical field of metal surface treatment process auxiliary equipment, and discloses a method for prolonging the service life of a loading hanger for a special polishing and washing process, which comprises the following steps: S1, a spray gun nozzle is matched with carborundum to carry out sand blasting treatment on the hanger; s2, an alkali washing degreasing agent is matched with ultrasonic power cleaning equipment for cleaning; s3, the hanging tool is put into an oven to be heated step by step, and a Teflon powder material is evenly sprayed and attached to the surface of the hanging tool from top to bottom through a spray gun; s4, after spraying is completed, the hanging tool is moved into a constant-temperature oven, the temperature is set, constant-temperature curing is conducted, and then heating is stopped till the hanging tool is naturally cooled to the normal temperature; the titanium alloy hanger base body and the Teflon protection layer are used in cooperation, hydrofluoric acid corrosion resistance and high temperature resistance of Teflon are utilized, a compact protection film is formed on the surface of the hanger, and passive film damage and metal corrosion reaction are avoided; and meanwhile, the binding force of the protective layer and the base body is improved through the sand blasting roughening process, and the service life of the hanger is prolonged.

The invention discloses an armored sand-ceramsite bimodal proppant based on performance matching as well as a preparation method and application thereof, and relates to the technical field of oil and gas exploitation. The proppant comprises ceramsite and armored sand which are compounded according to the mass ratio of (20: 80)-(60: 40), the volume density ratio of the ceramsite to the armored sand is 0.9-1.1, the median particle size ratio of the ceramsite to the armored sand is 1.5-3.0, it can be ensured that the proppant is evenly and stably conveyed to a target crack, the ceramsite forms a bearing framework, gaps are filled with the armored sand, and a synergistic and stable composite supporting structure is constructed. According to the proppant, the four-in-one performance matching design of volume density, breakage rate, acid solubility and particle size is adopted, the obtained proppant is superior to a conventional proppant in breakage resistance, acid corrosion resistance and long-term flow guide performance, the preparation cost is low, the defects of performance mismatch, system failure and the like of the conventional proppant can be overcome, and the proppant has wide application prospects in hydraulic fracturing construction of oil and gas fields.

The invention provides a metallographic detection method for the grain size of an AZO target material, and belongs to the technical field of detection. The AZO target material is ground through coarse grinding, fine grinding and polishing, impurities on the to-be-observed face of the AZO target material can be removed through coarse grinding, meanwhile, the roughness of the AZO target material is preliminarily reduced, the roughness of the to-be-observed face of the AZO target material can be further reduced through fine grinding, the smooth surface can be obtained through polishing, and therefore follow-up corrosion is facilitated; the salpeter solution is used as the acid corrosive agent, so that the grain structure of the AZO target material can be shown, and the AZO target material cannot be damaged; corrosion is carried out at 18-30 DEG C, so that the corrosion rate can be increased; by controlling the corrosion time, grains can be completely displayed, the boundary is clear, a grain boundary image can be clearly and rapidly captured under a metallographic microscope, and then the grain size of the AZO target material can be rapidly measured.

The invention relates to the field of chemical analysis and detection, in particular to a method for rapidly detecting the concentration of industrial concentrated acid based on neutralization reaction, which comprises the following steps: 1, theoretical calculation; converting molar concentration according to acid density and mass fraction; 2, accurately measuring the volume of target acid by using a pipette; 2, injecting 100-150ml of pure water into the triangular flask, and adding 3-5 drops of phenolphthalein; 3, slowly injecting an acid sample into the triangular flask, and slightly shaking and uniformly mixing; 4, adding 10.00 ml of NaOH solution by using the pipette, and oscillating for 10-20 seconds; 3, result interpretation: transparency and colorless: acid is excessive when the acid concentration reaches the standard, pH is less than or equal to 8.2 after neutralization, pink lasts for 20-30 seconds, and reinspection is needed when the acid concentration is insufficient and the pH is greater than or equal to 8.3. The method has the beneficial effects that 1, a reverse judgment method is adopted, namely the conventional end-point titration is replaced by fixed alkali amount, so that the detection time is shortened to 2 minutes; 2, safety design: pre-dilution reduces the risk of acid mist, and only a trace amount of raw acid is needed to avoid acid corrosion; 3, multi-acid adaptation: compatibility with detection of different types of concentrated acids is realized through pipetting volume adjustment;

The invention provides a method for controlling the pH value of condensate water of a blast furnace gas pipeline, which comprises the following steps: arranging a plurality of alkali liquor injection point positions along the blast furnace gas pipeline, and arranging alkali liquor injectors at the alkali liquor injection point positions; and detecting whether condensate water is generated at each point position, and opening the alkali liquor blowing devices at the point position before the first point position for generating the condensate water to the point position before the last point position for generating the condensate water to neutralize HCl dissolved in the condensate water between the first point position for generating the condensate water and the last point position for generating the condensate water. According to the method, the multiple point positions are arranged on the blast furnace gas pipeline, each point position is provided with the alkali liquor blowing device capable of blowing the alkali liquor, the alkali liquor starts to be blown at the point position before condensate water starts to appear, and the pipeline in front of the point position where the condensate water starts to appear is prevented from being corroded by acid in advance; and alkali liquor injection is stopped at the last point where condensate water appears, and corrosion aggravation caused by pipeline blockage due to alkali liquor waste and solute sedimentation is avoided.

The utility model provides a simple cleaning device and a cleaning machine for a semiconductor wafer after acid corrosion, and relates to the technical field of semiconductor wafer production, the simple cleaning device comprises a liquid medicine tank used for accommodating wafer cleaning liquid medicine, and a first ultrasonic device is arranged in the liquid medicine tank; a uniform flow pipe and a second ultrasonic device are arranged in the rinsing bath, and the rinsing bath is provided with an overflow port; the temperature adjusting assembly comprises a radiator, a heater, a temperature sensor and a water inlet pipeline, and the radiator, the heater and the temperature sensor are all arranged in the liquid medicine tank; the water inlet pipeline is connected with an inlet of the radiator through a first branch pipeline and connected with the flow uniformizing pipe through a second branch pipeline. Valves are arranged on the first branch pipeline and the second branch pipeline; an outlet of the radiator is connected with the second branch pipeline through a third branch pipeline; and the valve, the heater and the temperature sensor are electrically connected with the control device. The utility model has the beneficial effects of simple structure, small volume, simplicity, convenience, energy conservation and low production cost.

The invention provides a microporous copper foil preparation method, which comprises: mixing an oxidizing agent, a corrosion inhibitor, a complexing agent, a surfactant and water, and adjusting the pH value to obtain a corrosive liquid; performing electrochemical etching in the corrosive liquid by taking the electrolytic copper foil as an anode and a cathode plate at a specific point location as a cathode to form a copper foil; and cleaning the etched copper foil, and passivating the cleaned copper foil in an anti-oxidation solution to obtain the microporous copper foil. The method provided by the invention comprises the following steps: taking a copper foil as a corrosive anode, forming an electrolytic tank with a cathode plate at a specific point location and a corrosive liquid, carrying out site oxidation on the surface of the copper foil through an oxidant, and carrying out acid corrosion on the site to form a blind hole; in order to ensure that the corrosion degree of the copper foil is consistent, blind holes are formed, a corrosion inhibitor, a surfactant and a complexing agent are combined, and the corrosion rate of the copper foil is reduced; the method can effectively control the formation of copper foil micropores and the size of the pore diameter.

This invention belongs to the field of battery gas diffusion layer preparation, and in particular, a high-temperature fuel cell gas diffusion layer structure and its preparation method. Addressing the problem that in existing high-temperature proton exchange membrane fuel cells, the operating environment easily leads to oxidation and acid corrosion of the gas diffusion layer, causing damage and failure, reduced durability, and consequently, a sharp decline in battery performance, the invention includes the following steps: S1: Preparation of high-temperature graphitized carbon black: Weigh ordinary carbon black and pretreat it at 300–500°C for 10–30 minutes to remove surface impurities. This invention performs high-temperature graphitization treatment on the carbon black used in the microporous layer and prepares a microporous layer slurry with good coating quality. Then, using a hydrophobic agent with superior performance compared to traditional PTFE, its oxidation and acid corrosion resistance are greatly improved, and its durability is enhanced. This makes it suitable for application in high-temperature proton exchange membrane fuel cells, enabling long-term, undiminished battery performance.

The application discloses a forming process of acid-resistant ceramic products, and aims to solve the problem of poor acid resistance of ceramics caused by microstructure defects and grain boundary impurities in the prior art. The steps of the process comprise the following: firstly, the surface of main raw material particles containing alumina and silicon dioxide is chemically modified, and a nanoscale metal oxide coating layer with high chemical inertness is generated in situ on the surface of the particles. Then, the modified powder is prepared into a high-uniform-density ceramic green body by using a gradient pulse pressure forming method, so as to eliminate internal defects. In the sintering step, a controllable atmosphere multi-stage treatment is adopted: firstly, high-temperature purification is carried out in a weak reducing atmosphere, so that the inherent alkali metal oxide impurities in the raw material are removed in the form of gas phase; and then, the inert atmosphere is switched to complete the final densification sintering. The acid-resistant ceramic product prepared by the process has the characteristics of high density and enhanced acid corrosion resistance.

The application discloses a kind of metal piece surface ceramic layer acid and alkali resistance testing device, including storage pool, the inside of storage pool is internally provided with the storage mechanism of storage detection solution, the inside of storage pool is provided with the transmission mechanism for driving metal piece to carry out detection on storage mechanism upper end, the surface one side of storage pool is provided with for driving transmission mechanism to overturn transmission mechanism.The application uses effect is good, can carry out the quick switching of acid corrosion resistance and alkali corrosion resistance detection, so as to improve detection efficiency, and there is cleaning function when switching, so as to prevent acid and alkali solution mutual crossing and reaction.

This invention provides a corrosion inhibitor for high-acid environments and its preparation method. The high-acid environment refers to a corrosive environment where the mass fraction of inorganic acids (such as hydrochloric acid, sulfuric acid, or a mixture of hydrofluoric acid and hydrochloric acid) is 15% to 28%. The corrosion inhibitor is composed of the following components in parts by weight: 10-15 parts modified bis-Schiff base, 5-10 parts organic amine compound, 5-10 parts low-carbon alcohol, 1-5 parts corrosion inhibitor, and the balance being deionized water. The modified bis-Schiff base is obtained by a condensation reaction between diamines and diaromatic aldehydes. The ether-modified bis-Schiff base compound provided by this invention, in synergy with the organic amine compound and corrosion inhibitor, achieves efficient, long-lasting, and environmentally friendly protection against high-acid corrosive environments. The corrosion inhibitor provided by this invention is free of silicon, phosphorus, halogens, or other toxic and harmful heavy metals, and can form a dense organic protective layer on the metal surface, effectively inhibiting corrosion of metal equipment in high-acid environments.

The invention discloses an NIFE etching method which is used for an MEMS, and the execution of ion beam etching comprises the following steps: executing ion beam bombardment for a first time length from a first direction at a first angle; executing first-duration ion beam bombardment along a second direction at a second angle; executing second-duration ion beam bombardment along a second direction at a third angle; executing second-time ion beam bombardment along the second direction at a fourth angle; wherein the first angle, the second angle, the third angle and the fourth angle are different, the first duration is longer than the second duration, and the first direction is opposite to the second direction. After original 90-degree / 270-degree main etching, bombardment at two symmetrical angles of 180 degrees / 360 degrees is added, polymers on the side wall in the X direction are thoroughly removed through oblique ion beam physical sputtering, a follow-up acid corrosion path is blocked, generation of corrosive components in NIFE etching can be avoided, noise in the X direction is reduced, and the yield is increased.

The invention discloses a strong-acid-corrosion-resistant carbon-loaded platinoid all-alloy nano material and a preparation method thereof, and relates to the technical field of new energy materials. The preparation method of the carbon-loaded platinoid all-alloy nano material comprises the following steps: dispersing a carbon carrier in a solvent, adding platinum and copper precursors, dispersing, and adsorbing at constant temperature to obtain a suspension mixed solution; drying by distillation, drying and grinding to obtain a solid compound; calcining in an inert atmosphere, and cooling to obtain a carbon-supported platinoid material; and carrying out strong acid corrosion treatment, washing, drying and grinding to obtain the strong acid corrosion resistant carbon-loaded platinoid all-alloy nano material. The prepared material can keep the crystal structure stable in a strong acid environment and has excellent acid corrosion resistance, and the platinum-copper nano material takes platinum as a solvent and copper as a solute to form a complete alloy phase with the atomic ratio of copper to platinum being greater than or equal to 1: 1. When the material is used as an oxygen reduction catalyst, the atom utilization rate of platinum is high, and meanwhile, the oxygen reduction reaction catalytic activity and long-term stability of the material are remarkably improved.

The invention relates to the technical field of anti-corrosion materials, and particularly discloses a carbon dioxide and hydrogen sulfide acid corrosion resistant anti-corrosion material for concrete, which comprises the following raw materials: an epoxy matrix agent, a nano interface modifier and a modified filler, wherein the substance mass ratio of the epoxy matrix agent to the nano interface modifier to the modified filler is (12-15): (4-7): 3. According to the anticorrosive material for the concrete, the epoxy matrix agent is matched with the nano interface modifier and the modified filler, the epoxy matrix agent is prepared by matching and blending the epoxy resin, the curing agent, the adhesion promoter and the flatting agent, and the nano interface modifier and the modified filler are mutually matched and synergized; the prepared anticorrosive material can optimize the carbonization resistance and impact resistance of concrete, and meanwhile, the product has remarkable hydrogen sulfide acid corrosion resistance and concrete freeze-thaw stability.