19results about How to "Increase corrosion rate" patented technology

The invention discloses a vehicle body test cabin accelerated corrosion test device and test method, and belongs to the field of vehicle body corrosion tests. An accelerated corrosion test device for a vehicle body test chamber comprises three test boxes, and further comprises two fixing blocks symmetrically and fixedly arranged in the test boxes; the detection groove is formed in the fixed block; the vehicle body plate is arranged in the detection groove; the fixing assembly is arranged in the detection groove, and the fixing assembly is used for limiting a vehicle body plate; the limiting rod is fixedly arranged between the two fixing blocks; the threaded sleeve is arranged on the limiting rod in a sliding manner; the friction assembly is fixedly arranged on the side, close to the vehicle body plate, of the threaded sleeve; according to the method, the influence on the corrosion of the vehicle body plate under different conditions is judged through the three groups of difference values, so that a rapid corrosion test is effectively carried out on the vehicle body, and meanwhile, the vehicle body corrosion rate is effectively increased.

The invention discloses an alkali corrosion liquid for silicon in the semiconductor industry and a corrosion method of the alkali corrosion liquid. According to the alkali corrosion liquid, a corrosion method of slow acid corrosion and sufficient alkali corrosion is adopted, the surface roughness of the silicon wafer can be effectively reduced, in addition, in the alkali corrosion liquid, a surfactant, an active additive, sodium dodecyl polyoxyethylene ether sulfate and the like are matched with alkali, so that the surface tension of the alkali is further reduced, the corrosion rate is higher, and the service life of the silicon wafer is prolonged. The surface tension can be effectively reduced, the affinity of the etching liquid and a silicon substrate is improved, the selective etching capability to silicon dioxide in the etching process can be enhanced, corrosion to the silicon substrate is reduced, and a more uniform and accurate etching effect is achieved. Through measurement, the surface roughness Ra of the silicon wafer obtained by the corrosion method is less than or equal to 0.1 mu m, and the single metal cation is lt; and the corrosion rate can reach 1-1.5 microns / minute and is stabilized within + / -5%.

The invention discloses a hot rolled steel coil for a supercritical carbon dioxide conveying pipeline and a production method of the hot rolled steel coil. The steel coil comprises the following chemical components in percentage by weight: 0.03 to 0.05 percent of C, 0.10 to 0.30 percent of S i, 1.20 to 1.40 percent of Mn, less than or equal to 0.010 percent of P, less than or equal to 0.002 percent of S, 0.030 to 0.050 percent of Nb, 0.005 to 0.020 percent of T i, 0.20 to 0.40 percent of Cr, 0.10 to 0.25 percent of N i, 0.020 to 0.050 percent of Al and the balance of Fe and inevitable impurities. The Nb-Ti-Cr-Ni alloy components and the TMCP rolling technology are adopted, the thickness of a steel coil is 10-15 mm, the steel coil has good strength, low-temperature toughness and carbon dioxide corrosion resistance, the impact energy at the temperature of-60 DEG C is larger than 300 J, the corrosion rate is smaller than 0.125 mm / a, and the requirement for the steel for the supercritical carbon dioxide conveying pipeline is completely met.

The utility model relates to a motor cover support with a protection structure, which comprises a motor body, the bottoms of a front cover and a rear cover of the motor body are fixedly connected with support plates, the bottoms of the support plates are fixedly connected with bottom plates, and two sides of each group of bottom plates are provided with screw holes. The supporting plates and the bottom plate are each provided with a protection assembly used in cooperation with the corresponding screw hole, each protection assembly comprises grooves formed in the bottoms of the two sides of the corresponding supporting plate, strip-shaped boxes are rotationally arranged in the grooves, and fixing frames are rotationally arranged on the two sides of the bottom plate. The end, away from the bottom plate, of the fixing frame is fixedly connected with a sealing cover used in cooperation with the strip-shaped box, the protection assembly is arranged, bolts installed in the screw holes can be shielded through the sealing cover, and the sealing cover can be rapidly pressed and positioned; therefore, water vapor or impurities are effectively prevented from increasing the corrosion speed of bolts installed in the screw holes, and the overall protection effect of the support is improved.

The present invention discloses an accelerated corrosion test device and test method for metal hanging plates in a marine environment. The accelerated corrosion test device for metal hanging plates in a marine environment comprises a base, a support column, a sample rack for placing metal samples, and two metal meshes connected to high voltage electricity. The lower end of the support column is fixed on the base. The sample rack and the metal mesh are inclined and are both arranged on the support column. The two metal meshes are respectively located above and below the sample rack so that the sample rack is located between the two. The present invention uses high voltage electricity to pass through the metal mesh and uses the electric field to accelerate the corrosion of the metal plate, which not only ensures that the corrosion rate of the metal sample is accelerated and the test cycle is shortened, but also maintains the variable corrosion factors of the outdoor natural environment, which is more in line with the actual environment and improves the accuracy of the test results. In addition, the present invention has a simple structure, low cost, easy operation, and strong practicality, and can be widely promoted and used.

The invention discloses an accelerated test method for the corrosion resistance of a gas diffusion layer, and belongs to the field of hydrogen energy technology. The accelerated test method comprises: when preparing the gas diffusion layer, precious metal nanoparticles are added to a microporous layer to obtain a gas diffusion layer containing precious metal nanoparticles, and the precious metal nanoparticles accelerate the corrosion rate of the gas diffusion layer; the gas diffusion layer containing precious metal nanoparticles is used as a working electrode, a constant potential is applied to the working electrode, and the corrosion current density of the gas diffusion layer containing precious metal nanoparticles is tested over time to evaluate the corrosion resistance of the gas diffusion layer containing precious metal nanoparticles, and then evaluate the corrosion resistance of the gas diffusion layer without precious metal nanoparticles. The accelerated test method of the invention effectively shortens the time for testing the corrosion resistance of the gas diffusion layer and reduces the detection cost; it can be used to quickly and accurately evaluate the corrosion resistance of gas diffusion layers of different manufacturers, different raw materials, and different models.

This application discloses a sulfur-lead composite steel rod and its preparation method, as well as a steel pipe and soluble structural components, solving the technical problem that soluble bridge plugs in the prior art do not meet the high-pressure maintenance requirements of deep wells. The steel rod comprises the following chemical composition in parts by mass: Fe: 90-97.5 parts, C≤0.6 parts; S: 0.1-0.6 parts, Mn: 0.50-3.00 parts, Pb: 0.2-0.3 parts, O: 0.0010-0.0200 parts; the steel rod has composite inclusions; the composite inclusions include an inner core and a continuous or discontinuous outer shell distributed around the inner core, the inner core including manganese sulfide particles, and the outer shell including first lead particles; the steel rod includes a first region, a second region, and a third region arranged sequentially from the inside out; the average equivalent diameter of the composite inclusions in the first region is larger than that in the second region; the number of composite inclusions per square millimeter in any cross-section of the third region is greater than that in the second region. The sulfur-lead composite steel rod provided by this application has high strength and meets the high-pressure maintenance requirements of deep wells.

The invention discloses a quick-disassembly and quick-assembly dry-type transformer, and relates to the technical field of transformers, the quick-disassembly and quick-assembly dry-type transformer comprises a transformer body and a fixing seat, a positioning rail is mounted at the bottom of the transformer body, the fixing seat comprises a fixing groove, a supporting shell is mounted in the fixing groove, and a power fixing mechanism is mounted in the supporting shell; supporting rollers are installed in the positioning grooves, the outer walls of the supporting rollers are sunken towards the axes of the supporting rollers to form positioning ring grooves, supporting rails are arranged at the top of the supporting shell, supporting plates are arranged at the bottoms of the supporting rails, supporting protrusions are arranged at the tops of the supporting plates, the supporting rollers abut against the tops of the supporting plates, and the supporting protrusions are matched with the positioning ring grooves. Therefore, the supporting rollers are matched with the supporting plates, so that the transformer body with great weight can be quickly assembled and disassembled under the condition that equipment such as a crane is not used.

The present invention relates to the field of medical materials, and discloses an electrolyte for micro-arc oxidation and its application, an orthopedic implant material and its preparation method. The electrolyte of the present invention comprises phosphate, strong alkali and water. The coating prepared on the surface of zinc alloy by the micro-arc oxidation electrolyte of the present invention has a zinc oxide coating with high porosity and three-dimensional structure, which not only significantly improves the corrosion rate of zinc-based materials, but also can improve the adhesion and proliferation of osteoblasts, and promotes the application of medical zinc-based materials in the preparation of orthopedic implants.

This invention belongs to the field of corrosion protection technology, specifically relating to a magnetic nano-corrosion inhibitor, its preparation method, and its application. The magnetic nano-corrosion inhibitor is formulated from Fe3O4@imidazoline nanocomposite material, dispersant, synergist, and water in a predetermined mass ratio. The Fe3O4@imidazoline nanocomposite material is obtained by reacting hydrogen peroxide with an imidazoline-based Fe3O4 precursor, which is obtained by reacting ferric chloride, oleic acid, and ethylenediamine. It is applied to equipment requiring corrosion protection in oil and gas field surface gathering and transportation projects. This corrosion inhibitor can adsorb onto the pipeline surface, increasing the toughness of the protective film, enhancing the adsorption effect of imidazoline, providing long-term protection against pipeline corrosion, exhibiting a significant corrosion inhibition effect, and is low in cost, simple to operate, and produces no secondary pollution.

The invention discloses an efficient degradation low-density magnesium-based alloy and a preparation method and application thereof. The invention belongs to the technical field of magnesium-based alloys for fracturing balls. The technical problems that an existing fracturing ball is high in density and difficult to flow back or drill and mill after being used are solved. According to the Mg-Li-based alloy provided by the invention, the proportion of Mg, Gd and Ni is reasonably regulated and controlled, so that the fracturing ball prepared from the degradable Mg-Li-based alloy has the advantages of good plasticity and toughness, high specific strength, high pressure bearing capacity and high primary corrosion degradation rate, the fracturing ball can be quickly dissolved underground after fracturing operation is completed, the efficiency of the fracturing operation is effectively improved, and the fracturing cost is reduced. Therefore, the petroleum production efficiency is greatly improved, and the petroleum production cost is reduced.

The invention discloses a back polishing additive for reducing alkali consumption as well as a preparation method and application of the back polishing additive. The back polishing additive comprises the following components in percentage by mass: 0.01-0.5% of a catalyst containing a nitrobenzene structure, 0.1-1% of a defoaming agent, 0.5-1.5% of a preservative and the balance of water. The additive can perform polishing reaction under the condition that the alkali concentration or consumption is lower than the alkali concentration or consumption required by a conventional additive, the additive has a larger alkali reducing capacity compared with the conventional additive, in addition, after the additive is used for performing the alkali polishing reaction, the surface tower footing flatness of a silicon wafer is good, the reflectivity is higher, the polishing effect is better, and the service life of the silicon wafer is prolonged. And the efficiency of the battery is remarkably improved.

The invention discloses circuit board processing equipment and a processing method thereof, and particularly relates to the technical field of circuit board processing, the circuit board processing equipment comprises a mounting plate, a fixing plate is fixedly connected to the front side of the top of the mounting plate, a vibration structure is arranged in the mounting plate, and a cleaning structure is arranged on the rear side of the fixing plate. A fixing structure is arranged above the mounting plate, the vibrating structure and the cleaning structure are arranged, the vibrating structure can make corrosive liquid act on the surface of the circuit board more evenly, the corrosion rate is increased, and meanwhile the phenomenon of uneven corrosion is reduced. The cleaning structure can effectively remove residues which are not corroded on the surface of the circuit board, the cleanliness of the circuit board is ensured, possible problems in follow-up machining are avoided, the circuit board can be stably fixed in the machining process by arranging the fixing structure, the machining precision is ensured, and the machining efficiency is improved. Therefore, the circuit board does not displace in the corrosion and cleaning process.

The application provides a preparation method of a BC battery solving a front side wrap plating problem, a BC battery and a photovoltaic system, and relates to the technical field of photovoltaic cells. The method comprises the following steps: after polishing a silicon wafer, a first tunneling layer and a first poly layer are arranged on one side of the silicon wafer in sequence, a boron-doped passivation layer is arranged on the first poly layer, and a first laser opening mold is performed to obtain a first silicon wafer; a second tunneling layer, a second poly layer and a phosphorus-doped passivation layer are arranged on an N+ region of the first silicon wafer; a gap region is divided, a second laser opening mold is performed on the gap region by using a second laser to obtain a second silicon wafer; the second silicon wafer is subjected to rough polishing treatment and texturing treatment in sequence to obtain a third silicon wafer; an aluminum oxide layer is arranged on the surface of the third silicon wafer, and a silicon oxynitride layer is arranged on the surface of the aluminum oxide layer. The method can effectively remove the edge wrap plating layer by adding rough polishing treatment before texturing, so that the edge wrap plating layer can be effectively removed, and a normal textured surface can be prepared.

The invention discloses a preparation method of an electronic device and the electronic device, relates to the technical field of microelectronics, and can improve the electrical performance of the electronic device. The preparation method of the electronic device comprises the following steps: sequentially arranging a dielectric layer and a first metal layer on one side of a silicon wafer; arranging photoresist on one side, far away from the silicon wafer, of the first metal layer, and performing graphical processing on the photoresist by utilizing a photoetching process so as to form a first via hole in the photoresist; electroplating the first via hole to form a second metal layer in the first via hole; removing the photoresist to form a second via hole in the second metal layer; performing wet etching on the first metal layer to form a third via hole in the first metal layer, and communicating the second via hole with the third via hole to obtain a transition substrate; cleaning the transition substrate with deionized water for at least one time; the sacrificial layer is removed through the second via hole and the third via hole to obtain a cavity structure, and the cavity structure is communicated with the third via hole.

The invention discloses an optical fiber corrosion system, which comprises a corrosion container, which is provided with a reaction cavity, and is provided with a reflux inlet and an optical fiber port which are respectively communicated with the reaction cavity, the reaction cavity is used for containing corrosive liquid, and the optical fiber port is used for allowing an optical fiber to be processed to extend into the contained corrosive liquid; the backflow pipeline is provided with a steam channel and is provided with an air inlet and an air outlet which are respectively communicated with the steam channel, the air inlet of the backflow pipeline is communicated with the backflow port of the corrosion container, and the backflow pipeline is obliquely arranged so that the air outlet is higher than the air inlet; the heating device is used for heating the corrosion liquid in the corrosion container; the condensing device is used for cooling the corrosion steam in the return pipeline; and the treatment device is used for treating the corrosion steam flowing out of the return pipeline and is communicated with the steam outlet of the steam channel. The invention discloses an optical fiber corrosion method based on the system.

The application discloses an anti-freezing solution for a heat source tower, which is composed of organic salt, acrylic acid polymer, quaternary ammonium salt, benzotriazole, sodium molybdate, alcohol and water. The anti-freezing solution is obtained by mixing organic salt, acrylic acid polymer, quaternary ammonium salt, benzotriazole, sodium molybdate, alcohol and water, and is used in the anti-freezing process of the heat source tower system in the north. The organic salt is used as an anti-low-temperature agent, and the pyridine quaternary ammonium salt, benzotriazole and sodium molybdate mainly play a corrosion protection role. The anti-freezing solution has obvious synergistic effect among the components, and the freezing point of the obtained anti-freezing solution is lower and more stable. The anti-freezing solution has the characteristics of corrosion resistance to carbon steel, stainless steel and copper, so as to meet the technical requirements of the anti-freezing solution used in the heat source tower heat pump in the north. In addition, the obtained anti-freezing solution also has the characteristics of low cost and good environmental protection.

According to the experimental method and device for corrosion of the copper-clad steel grounding material and the service life evaluation method provided by the invention, the corrosion process of the copper-clad steel grounding material is accelerated by adding a mixture of oxygen, carbon dioxide and ammonia gas in a specific proportion into the soil leachate, corrosion close to an actual environment is simulated, and the service life of the copper-clad steel grounding material is evaluated. The consistency of a corrosion product generated under an experimental condition and a corrosion product generated in a natural environment is ensured, the simulation precision and efficiency of the corrosion behavior of the copper-clad steel grounding material in a laboratory are improved, accurate corrosion data are quickly obtained, and a scientific basis is provided for design, material selection and maintenance of the grounding material; according to the experimental method for corrosion of the copper-clad steel grounding material, corrosion acceleration is carried out by adding mixed gas of oxygen, carbon dioxide and ammonia gas into soil leachate, and the experimental method comprises the following steps: step 1, preparing experimental materials; step 2, configuration of a gas mixing system; step 3, a corrosion experiment process; 4, analyzing a corrosion product; and 5, recording and analyzing data.

The invention discloses an additive for solving LPCVD double-plug front surface winding and enlarging printing of a TOPCon cell and a cleaning process, and relates to the technical field of solar cell production and manufacturing. Comprising the following components: an alkali corrosion catalyst, a multi-carboxyl polymer, organic acid, a chelating agent, a surfactant, lactobionic acid, tetrahydroxymethyl glycoluril, hydroxypropyl beta-cyclodextrin, hyperbranched polytriazole hb-PTA-OEG and water. According to the additive and the cleaning process, polycrystalline silicon can be selectively etched and adsorbed on the surface of BPSG, the polycrystalline silicon is protected from being corroded by alkali in the winding plating removing process, meanwhile, the corrosion rate of winding plating in an alkali solution can be increased, front polycrystalline silicon can be removed more rapidly and thoroughly, and the gain effect on battery efficiency is obvious.