382results about How to "Avoid Galvanic Corrosion" patented technology

The invention discloses a high-conductivity non-heat-treatment type moderate-intensity aluminum alloy wire and a production method of the high-conductivity non-heat-treatment type moderate-intensity aluminum alloy wire. The high-conductivity non-heat-treatment type moderate-intensity aluminum alloy wire is produced by finely selecting ingredients and contents of aluminum alloy and conducting process control. The specific steps are as follows: selecting Fe, Si, Mg, Cu and Re with different weight percents, melting aluminum ingot with the content not more than 0.03% in a vertical melting furnace, adding alloying elements in a heat insulation furnace, stirring, refining, conducting on-the-spot contents rapid analysis, carrying out content adjustment, and standing, enabling the aluminum ingot and the alloying element into a continuous casting machine for casting, rolling to be a circular aluminum alloy rod on a continuous rolling machine, pulling the circular aluminum alloy rod to be a circular aluminum alloy wire and twisting the circular aluminum alloy wire to be a conductor for aerial power transmission and distribution. According to the application of the aluminum alloy wire and the production method of the aluminum alloy wire, the aluminum alloy wire directly replaces the generally used aluminum conductor steel reinforced and is an energy-saving, environment-friendly and novel wire.

The invention relates to a non-aqueous coolant for an engine, which is characterized by comprising the following components in percent by weight: 10-80 percent of ethylene glycol, 10-80 percent of propylene glycol, 5-20 percent of polyol, 0.1-0.8 percent of phosphate-molybdate, 0.2-0.9 percent of silicate ester, 0.1-1 percent of 4-methyl 1H-benzotriazole, 0.2-0.8 percent of citric acid, 0.2-1 percent of sebacic acid, 0.1-1 percent of octanoic acid, 0.4-1.2 percent of citrate and 0.01-0.2 percent of cosolvent. The non-aqueous coolant has freezing point of -30--50 DEG C and boiling point of 130-150 DEG C, and ensures that the cold start of the engine is realized in cold weather; meanwhile, the working temperature of the engine is improved to 95-150 DEG C from the original 85-95 DEG C. The non-aqueous coolant belongs to a non-aqueous system, avoids electrochemical corrosion, and is a buffer system with pH of 7.5-9.5; and the added relevant auxiliaries have active corrosion resistance on aluminum and aluminum alloy and copper.

The invention relates to an electrode frame for a redox flow cell, in particular to an electrode frame structure for an all-vanadium redox flow cell, which is formed by fastening two frame bodies of which the shapes and sizes are completely same; a plane where the two frame bodies are mutually fastened is a fastening surface; and the fastening surface of at least one frame body is provided with afluid channel which is fastened into a border to form an embedded-structure electrolyte inlet and outlet channel. The structure increases the resistance of an electrolyte channel branch, reduces leakage current, avoids thermogalvaniccorrosion in charging and discharging processes, and prolongs the service life of the cell (stack).

The invention discloses a deposition method of a low-stress corrosion-resistant multilayer diamond-like carbon (DLC) film. A vacuum cathode arc source deposition process and a plasma-reinforced chemical vapor deposition process are alternately adopted to alternately deposit hydrogen-free and hydrogen-containing DLC films. The method can deposit a micron-sized-thick multilayer DLC film, which has the advantages of high hardness, low stress, favorable bonding properties, favorable corrosion resistance and high stability, on the surface of a workpiece, thereby greatly prolonging the service time of the workpiece in a liquid medium environment.

The invention relates to a method for carrying out high velocity oxy-fuel spraying on the surface of a roller of a lithium battery pole piece rolling machine. The method of adding hydrogen into fuel and decreasing the diameter of a combustion chamber is adopted. By means of adding the hydrogen, the heat enthalpy value and the speed of the flame are increased. By means of adding of the hydrogen, tungsten carbide particles can be reduced and protected, and burning losses and decarburization are avoided. To further increase the speed of the flame, the diameter of an outlet of the combustion chamber is decreased by 2 mm-5 mm, the pressure of the combustion chamber is increased, and the speed of the flame is further increased. Due to adding of the hydrogen, burning losses and decarburization of the tungsten carbide particles can be reduced, the heat enthalpy value of the flame is increased, the tungsten carbide particles are heated more evenly, a coating can have higher tenacity and compactness, and the binding force of the coating is improved. By means of the method, the speed of the flame is increased, and the aim of increasing the particle spraying speed is achieved; and tungsten carbide particles at a higher speed impact on a base body, the binding force of the coating and the base body is improved, the inner binding force of the coating is increased by means of subsequent higher-speed particle impact, and therefore the binding force of the whole coating is increased.

The present invention discloses a coupling structure and a coupling method for a coupling piping of an air conditioner, capable of stably coupling a coupling piping made of cheap material such as aluminum metal. The invention includes a coupling piping, one end of which is connected with an outdoor unit and the other end is connected to an indoor unit, to guide refrigerant; a combination member, for combining the coupling piping and the outdoor unit as well as the indoor unit. Moreover, a metallic loop for preventing the refrigerant from leakage is inserted between piping connection portions of at least one of the coupling piping and the outdoor unit as well as the indoor unit, and consolidation is implemented by the combination member.

The invention discloses a fiber-metal composite laminate, a forming die therefor and a forming method. The fiber-metal composite laminate comprises two aluminum-alloy layers, wherein at least two PEEKresin layers are arranged between the two aluminum-alloy layers, and a carbon fiber prepreg layer is arranged between every two adjacent PEEK resin layers. The forming die for the fiber-metal composite laminate comprises a male die and a combined female die which are arranged correspondingly. The forming method for the fiber-metal composite laminate comprises the step of carrying out hot stampingforming on the fiber-metal composite laminate by using the forming die. According to the fiber-metal composite laminate, the forming die therefor and the forming method, disclosed by the invention, the efficiency and quality of production of the fiber-metal composite laminate are improved.

The invention discloses a positive steel shell of a button lithium battery and the button lithium battery, and belongs to the field of batteries. The positive steel shell of the button lithium battery is an open shell, wherein the inner surface of the positive steel shell is provided with a metal anti-corrosion layer with high oxidation potential; and the metal anti-corrosion layer with the high oxidation potential is made of an aluminum foil or aluminum alloy and has the thickness of between 5 and 35mu m. Through the metal anti-corrosion layer, the positive steel shell of the button lithium battery is not subjected to electrochemical corrosion in an entire working voltage range, internal resistance and self-discharge of the battery are obviously reduced, and the electrochemical performance is high. Through the positive steel shell and the button lithium battery, the electrochemical corrosion of the battery steel shell due to the high oxidation potential can be avoided, the self-discharge and the internal resistance of the battery are reduced, and the button lithium battery has high performance.

The invention discloses a bamboo-wood-filled buckling restrained support. The bamboo-wood-filled buckling restrained support comprises a metal core part, a bamboo-wood-fiber filling part and a peripheral restraining part, wherein the bamboo-wood-fiber filling part is positioned between the metal core part and the peripheral restraining part and separates the metal core part and the peripheral restraining part so as to avoid from forming electrochemical corrosion. The bamboo-wood-filled buckling restrained support has the advantages that bamboo-wood fiber is filled between the metal core part and the peripheral restraining part, and the bamboo-wood-fiber filling part is positioned between the metal core part and the peripheral restraining part and separates the metal core part and the peripheral restraining part so as to avoid from forming the electrochemical corrosion; a flat plate and a rectangle and the like can be selected as the section form of the bamboo-wood-fiber part according to the form of the metal core part, and bamboo wood is adopted as a filling material to replace the traditional concrete, so that not only is the mass lighter, but also the recycling is easy, and the requirement for environmental protection is met.

The invention discloses a metal flange coated with an insulating ceramic coating and a preparation method thereof. The insulating ceramic coating comprises the following material components in percentage by weight: 0 to 50 percent of TiO2 and the balance of Al2O3, wherein the content of impurities is less than or equal to 2.0 percent. The coating position comprises all outer surfaces of a metal flange substrate. The coating has a thickness between 0.1and 0.6mm, a surface roughness less than or equal to 3.2mu m and a porosity less than 15 percent. The preparation method comprises the steps of preparing the metal flange substrate, preparing the coating and processing the coating. In the metal flange coated with the insulating ceramic coating and the preparation method thereof, dissimilar metal flanges are in a reliable electrical insulation state, electrochemical corrosion is prevented, a working temperature of the insulating flange is improved from about 300 DEG C permitted in the prior art to nearly 900 DEG C, the defects of the conventional flange insulation technology can be overcome, and the requirements of petroleum, chemical industry, electric power, ships and the like on the insulating metal flange are met.

The invention provides a multi-layer Mg / Zn laminated composite material for medical use and a preparation method thereof. The composite material comprises composite layers and base layers, wherein thecomposite layers are made of pure magnesium or magnesium alloy; and the base layers are made of a corrosion-resistant, high-strength and high-plasticity zinc alloy for medical use. The magnesium composite layers are arranged in an ordered manner according to self-corrosion potential, so that corrosion laterally develops layer by layer and strong galvanic corrosion between the magnesium layers andthe zinc layers is prevented. In addition, through the magnesium composite layers, the composite material has a lower elasticity modulus than zinc, and the stress shielding effect is effectively mitigated. The composite material has good biocompatibility of the magnesium and excellent mechanical property of the zinc. When implants, such as a bone screw, a bone plate and a stent prepared from thecomposite material play a medical role after being implanted, the zinc base layer bears more than 50% of load. In the early stage after implantation, the magnesium composite layers are in direct contact with bone tissues and promote the growth and healing of the bone tissues or recirculate blood as cardiovascular stents. Finally, the composite material is completely degraded in vivo, and the complete degradation time is 8-18 months.

The invention discloses a dynamic electrochemical corrosion and wearing test device. An electrochemical workstation and friction and wearing functions are integrated, and in-situ and dynamic test of the interaction of corrosion and wearing is carried out. The corrosion and wearing test device is rotary, and adopts a pin-disc friction contact mode and a three-electrode electrochemical test system,a lower test piece is a working electrode, and is connected with the electrochemical workstation through a mercury slip ring to dynamically test the electrochemical parameters in a rotating friction state. The device can detect the simple grinding weight loss, the corrosion weight loss and the corrosion and wearing interaction amount, can respectively detect the corrosion rates under simple corrosion and the co-action of corrosion and wearing, realizes real-time monitoring of the electrochemical performances and the friction performance under different conditions (load, rotating speed and medium), can accurately realize simultaneous test and in-situ research of the corrosion and wearing of the material, further realizes the dynamic research of the corrosion and wearing interaction mechanism, and has wide application values.

The invention relates to a nickel-plated copper material and a preparation method and application thereof, and belongs to the technical field of battery manufacturing. The nickel-plated copper material sequentially comprises fine copper, a copper-nickel alloy layer, a dull nickel layer and a high-weldability nickel layer from inside to outside. The thickness of the copper-nickel alloy layer ranges from 0.2 micrometer to 0.6 micrometer. The thickness of the dull nickel layer ranges from 0.2 micrometer to 0.6 micrometer. The thickness of the high-weldability nickel layer ranges from 0.6 micrometer to 2.6 micrometers. The preparation method includes the steps that the activated fine copper serves as a base material; firstly, low current is supplied by a pulse power source to electrically deposit the dull nickel layer; then, direct current nickel plating at high current density is conducted in an electrolyte with high-weldability nickel plating additives; and after electroplating is finished, in combination with annealing treatment and dehydrogenation thermal treatment matched with the electroplating process, the nickel-plated copper material which is strong in coating binding force, resistant to corrosion and folding and easy to weld is obtained. When the prepared nickel-plated copper material is used for nickel-plated copper strip electrode tabs of large-magnifying-power lithium ion batteries, the performance of the electrode tabs are far superior to the performance of similar products. The preparation process is simple and controllable, and industrial production is conveniently achieved.

The invention discloses a preparation method for bainite, martensite and austenite complex-phase corrosion-resistant steel. The preparation method is characterized in that a few multi-alloy elements are added to mutually restrain, i.e., a structure range is obtained by widening an upper bainite structure, a thermal treatment way adopts quick-cooling from austenite to a BS point, upper and lower bainite strcutures are obtained by adopting slow-cooling temperature-varying at a medium temperature, and a martensite residual-austenite structure is obtained at equal temperature within a low-temperature range. The whole process is used for continuously producing to obtain wear-resisting steel which consists of upper and lower bainites, martensite and austenite, and the wear-resisting steel resistimpact and cutting abrasion under various environments as well as corrosion. The production process simplifies the process of controlling cooling speed, and facilitates the preparation method for thebainite, martensite and austenite complex-phase corrosion-resistant steel which is simple in large-scale control, is good in quality and is high in wear resistance.

The invention relates to a device for producing hydrogen and oxygen through photoelectrochemistry composite or coupling, and a method thereof, which belongs to the technical field of green renewable energy. The device is characterized by comprising a solar battery at the upper part and a photoelectrochemistry pool at the lower part; the solar battery at the upper part comprises an electrode base plate, a photo-anode, electrolyte and a counter electrode; the solar battery at the upper part is a silicon solar battery, a dye-sensitized solar battery, an organic solar battery, a chemical compound semi-conductor solar battery or a polymer solar battery and the like; the photoelectrochemistry pool at the lower part comprises a photo-anode, electrolyte and a counter electrode. During use, under the irradiation of sunlight or simulated sunlight, the solar battery at the upper part discharges and generates external bias voltage, and the photo-anode of the photoelectrochemistry pool generates potential or energy. The external bias voltage and the potential or energy generated by the photo-anode of the photoelectrochemistry pool reach the schizolysis energy of water in the photoelectrochemistry pool, and the electrodes respectively generate hydrogen and oxygen. The device is characterized by high conversion efficiency of solar energy and hydrogen energy, low cost, simple process, and easy mass production of hydrogen.

Composite bearings and methods for manufacturing these bearings are provided in which a lining comprising polytetrafluoroethylene fiber and a second fiberous material are disposed within a polymeric matrix comprising polytetrafluoroethylene particles and a wetting agent. The composite bearings may be useful in hydropower applications where self-lubricating bearings containing graphite are undesirable because graphite can be corrosive to carbon steel.

The invention discloses a suspension device for tunnels. The suspension device mainly comprises an embedded sleeve, a toothed slot, a countersunk head screw and an elastic gasket, wherein the embedded sleeve is cast in a tunnel concrete duct piece in advance, the casting position is in the clearance part of the reinforcement cage structure of the tunnel concrete duct piece, the toothed slot and the embedded sleeve, by use of the countersunk head screw, are cooperatively connected with the inner arc surface of the tunnel concrete duct piece or in a semi-inlaid arrangement on the inner arc surface of the tunnel concrete duct piece, so as to prevent the embedded sleeve and the toothed slot from being in contact with the reinforcement cage structure of the tunnel concrete duct piece. The electrochemical corrosion on the main structure of the tunnel by stray current can be effectively lightened, the destruction on the main structure of the tunnel concrete duct piece by manual drilling and expansion bolts in the prior art can be prevented, the construction efficiency in tunnels can be increased, the proper specification of the toothed slot can be selected according to the concrete engineering requirements, the toothed slot can be conveniently replaced, the maintenance cost and the operation cost can be reduced, and the service life of the tunnel concrete duct piece can be prolonged.

The invention relates to a kind of corrosion-resistant and erosion resistant coating material, which in detail is a corrosion-resistant material for cable bridge surface. The invention adds flaky zinc powder concentration for traditional dacromet coating formulation, adds penetrating agent, surface active agent, hardening agent and rare earth material. The coating layer on the surface is characterized by high adhesion power, good wearing resistant performance, good antiweatherability and stable chemically-resistant property, and suitability for wild environment utilization for a long time, which as long as 30 years.

The invention relates to a power transmission bus and a bus assembly thereof. The power transmission bus comprises an aluminum strip and two copper-aluminum connecting components, wherein each copper-aluminum connecting component comprises a copper plate and a cast aluminum plate obtained by casting the copper plate as an embedded component; and one end of the cast aluminum plate and the aluminumstrip are welded together so that the two copper-aluminum connecting components are respectively positioned at both ends of the aluminum strip. The bus assembly for power transmission comprises threeto four buses, a square pipe and two seal blocks, wherein three to four buses are vertically arranged along the left direction and the right direction; rectangular holes matched with the copper-aluminum connecting components are arranged on the two seal blocks, and the two seal blocks are respectively sleeved outside the corresponding copper-aluminum connecting components and inserted at the leftend and the right end of the square pipe; the inner walls of the seal blocks are connected with the copper-aluminum contact position in a seal way, and the outer walls are connected with the inner wall of the square pipe in the seal way. The invention has favorable conductive performance, high reliability and long service life and can form a power line for transmitting low-voltage high-current ata long distance.

The energy-saving vertical pipe support with low noble metal consumption includes a supporting lug, a pipe clip and a fastener on the pipe clip, as well as a heat insulating layer, two semi-ring plates and / or a rectangular frame. The supporting lug is welded onto the pipeline, the supporting lug seat is on the heat insulating layer, the heat insulating layer seat is on the semi-ring plates or the rectangular frame, and the semi-ring plates or the rectangular frame is welded to the pipe clip and set on the pipe rack. The present invention has the capacity of saving energy and noble metal, less construction steps and lowered construction cost, and is suitable for different kinds of pipeline.

The invention provides a high-stability OLED device and a preparation method thereof. The high-stability OLED device comprises a substrate and a packaging cover plate 10, wherein the substrate is divided into a pixel region and a packaging region; the substrate and the packaging cover plate are connected through a sealing medium; a first electrode layer, an organic light-emitting layer and a second electrode layer are overlapped on the pixel region on the substrate; and a buffer layer is arranged between the first electrode layer and the substrate. Through the arrangement of the buffer layer,the lateral erosion phenomenon caused by dry etching of the auxiliary electrode layer is solved, and meanwhile, metal ions of the glass substrate are blocked from permeating into the first electrode layer, and electrochemical corrosion is avoided; by adding the auxiliary electrode, the brightness uniformity of a screen body is improved; a pixel defining layer is simultaneously arranged on the first electrode layer and the auxiliary electrode layer and is in direct contact with the buffer layer, so that a very good surrounding structure is formed for an effective pixel region and / or pixels of the OLED, volatile gas outgas is prevented from being released into the pixels to cause pixel shrinkage, and the reliability of the screen body of the OLED is improved.

The invention relates to a proton exchange membrane fuel cell unit and a cell stack, belonging to the technical field of hydrogen fuel cells. The battery unit is composed of hydrogen distributor, negative electrode flow field plate, membrane module MEA, positive electrode flow field plate and oxygen distributor. The hydrogen inlet and outlet are connected with the hydrogen inlet and outlet of negative electrode flow field plate respectively. The oxygen inlet and outlet are connected with the oxygen inlet and outlet of positive electrode flow field plate respectively. As that battery unit of the invention has independent hydrogen and oxygen supply port, the bipolar plate in the prior art is canceled, and the heat dissipation is replace by the liquid cooling circulation in the original structure through the external heat dissipation device, thereby avoiding the risk of the coolant leaking inside the battery, and at the same time, the gas quantity of each battery unit can be timely controlled, so as to ensure that the battery is not invalidated due to the anti-polar reaction. The series welding structure of the positive and negative electrodes of the battery cell is adopted to reducethe series resistance and improve the power characteristics. Greatly reducing manufacturing costs; Simplified manufacturing and assembly process facilitates large-scale production.

The invention discloses an optical fiber sensor combination for monitoring the corrosion of reinforced concrete. The optical fiber sensor combination comprises an optical fiber sensor and a compensation sensor, wherein the optical fiber sensor and the compensation sensor comprise reinforcing steel bar elements, reinforced fiber glass reinforced plastic support bases, optical fiber Bragg gratings and connecting optical fibers, protective sleeves, silicon sheets, reinforcing steel bar coating regions, reinforcing steel bar un-coating regions, and mortar housings, wherein the reinforcing steel bar elements of the optical fiber sensors are reinforcing steel bars to be tested, and the reinforcing steel bars of the compensation sensor are 316L stainless steel bars. According to the optical fiber sensor combination, a reaction force of mortar is counteracted to a certain extent, the local corrosion of the reinforcing steel bars is favorably monitored, and the sensitivity of monitoring is improved. The compensation sensor is made by adopting a manner of replacing common reinforcing steel bars by 316L stainless steel, and is simple in principle and convenient to operate. The optical fiber sensor combination is simple in structure, convenient to manufacture, low in cost, good in sensitivity, high in accuracy, strong in anti-electromagnetic interference, high in reliability, good in durability, and high in stability, and is suitable for monitoring the long-term durability of reinforcing steel concrete structures such as saline and alkaline land, seawater and deicing salt under multiple environments.

The invention relates to a nick plated copper product containing a nickel-cobalt alloy clad layer, and the preparation method and the application thereof, and belongs to the technical field of battery manufacturing. The nick plated copper product provided by the invention comprises pure copper, a nickel-cobalt-copper alloy layer, a nickel-cobalt alloy layer and a nickel layer from the inside out in sequence, wherein the thickness of the nickel-cobalt-copper alloy layer is 0.2 to 0.6 mum, the thickness of the nickel-cobalt alloy layer is 0.2 to 0.6 mum, and the thickness of the nickel layer is 0.6 to 2.6 mum. According to the nick plated copper product provided by the invention, activated pure copper is taken as a base material, a pulse power supply is adopted for electroplating, and by plating nickel and cobalt alloy under low electric current density firstly, carrying out nick plating under high electric current density of an electrolyte solution containing high weldability nick plating additive, and taking an annealing treatment and dehydrogenation heat treatment matched with the electroplating process for assisting after the accomplish of electroplating, the nickel-plated copper product which is strong in clad layer bonding force, is corrosion-resistant, folding resisting and easy to weld can be obtained. The nickel-plated copper product prepared by the invention has performances far superior to those of like products when being used for high-magnification lithium ion battery nickel-plated copper strip tabs. The preparation technology provided by the invention is simple and controllable, and is convenient for realizing industrial production.

The invention discloses an explosion-proof device of a power battery, which can be arranged on an explosion-proof hole of a battery cover board or a battery shell. The explosion-proof device comprises an insulated and sealed battery cover board or an explosion-proof board of the explosion-proof hole of the battery shell, a tension board and an explosion-proof cover, wherein the tension board is connected to the explosion-proof board by welding points and is provided with at least one venthole; and the explosion-proof cover is fixed on the battery cover board or the battery shell to compress the explosion-proof board and press the edge of the tension board. In the explosion-proof device of the power battery, the tension board is fixedly welded on the explosion-proof board to form a whole, the structure of the whole explosion-proof device is smoother, and the explosion-proof board is torn by the welding-point separation action of the tension board and the explosion-proof board in order to avoid the false action of the explosion-proof board and ensure the consistency of bursting pressure.

The invention provides a heat sink insulated liquid refrigeration semiconductor laser and a stack array thereof, which are used for meeting the requirements of high power, environmental suitability, reliability and the like. In the heat sink insulated liquid refrigeration semiconductor laser, a first insulation layer is arranged on the upper surface of a liquid refrigerator, a first electric and heat conduction layer is arranged on the first insulation layer, a laser chip and a negative electrode copper sheet are arranged at different positions of the electric and heat conduction layer, a positive surface of the laser chip is directly boned with a first electric and heat conduction layer, an insulation isolation layer exists between the negative electrode copper sheet and the surface of the first electric and heat conduction layer, and the negative electrode copper sheet is connected with a negative electrode of the laser chip through a gold wire or is directly connected with the negative electrode of the laser chip.

The invention relates to a bipolar plate for flow batteries, belonging to the field of flow batteries. The bipolar plate is divided into an electrode zone and a non-electrode zone, wherein the electrode zone is a zone where the flow battery bipolar plate contacts the adjacent electrodes on the two sides, and the rest is the non-electrode zone; the non-electrode zone is divided into a flow channel zone and a non-flow channel zone; the flow channel zone is a zone where the non-electrode zone contacts flow-channel-bearing frames of the adjacent electrode frames on the two sides, and the rest of non-electrode zone is the non-flow channel zone; and the flow channel zone is an anti-corrosion insulation zone. The flow channel zone of the bipolar plate is the anti-corrosion insulation zone, and the bipolar plate flow channel zone in contact with the flow channel zone of the electrode frame is set as the anti-corrosion insulation zone so as to achieve the goal of preventing electrochemical corrosion, thereby prolonging the service life of the bipolar plate and ensuring the stable operation of the flow battery.

The invention discloses an expansion joint for a conductive rail. The expansion joint for the conductive rail comprises a left conductive rail, a middle rail and a right conductive rail, wherein the right end face of the left conductive rail, the two end faces of the middle rail and the left end face of the right conductive rail are mutually-parallel inclined planes; the expansion joint further comprises a conductive plate and wires; the conductive plate is provided with a boss part fixedly connected to the bottom surface of the middle rail; the left end and the right end of the conductive plate are suspended; the wires consist of a left wire and a right wire; one end of the left wire is connected to the bottom surface of the left conductive rail, and the other end is connected to the suspended left end of the conductive plate; one end of the right wire is connected to the bottom of the right conductive rail, and the other end is connected to the suspended right end of the conductive plate; the wires keep in a relax state after being connected; and the expansion joint further comprises a copper-aluminum transition plate. The expansion joint provided by the invention has a simple structure, is excellent in pickproof and shock-resistant performance, can effectively ensure requirements of follow current and current carrying on the expansion joint, and can ensure constant and reliable current capacity.

The invention discloses an aluminum-coated steel curtain wall section structure. The structure comprises a steel keel vertical column, a transverse limiting frame material, a vertical male side frame material and a vertical female side frame material, wherein one end of the male side frame material and one end of the female side frame material are respectively inserted into clamping grooves of the limiting frame material, the other end of the male side frame material and the other end of the female side frame material are arranged on the upper surface of a steel keel in an overlapping mode, then a frame material combination is formed, and the whole steel keel is coated with the material combination. Accordingly, the frame material combination is arranged, the steel keel vertical column of a steel structure of a building is coated by the frame material combination, the appearance overall effect of the whole curtain wall structure is consistent, the appearance is attractive, a curtain wall system is convenient to install, and the structure is suitable to outer facade curtain wall building engineering industries.

The invention discloses a corrosion inhibitor for an oil-gas gathering and transportation pipeline and a preparation method thereof. The corrosion inhibitor comprises the following components in parts by weight: 1-3 parts of polyacrylic acid, 2-10 parts of surface active agent, 5-8 parts of gluconic acid sodium salt, 1-5 parts of aromatic azole, 5-20 parts of carbonate, 20-40 parts of organic amine, 10-30 parts of carrier, 10-30 parts of barium mahogany sulfonate, 1-3 parts of liquid wax and 10-20 parts of distilled water. The corrosion inhibitor is used for inhibiting acidic erosion existing in liquid or natural gas oil field pipelines, especially the erosion caused by sulfureted hydrogen; an alkalescent liquid is formed by adding carbonate and a carrier to guarantee the absorption to acids; the addition of gluconic acid sodium salt in the components realizes the absorption of metal ions such as iron ions, aluminum ions, calcium ions and the like in the exploitation of petroleum pipelines by forming complexes of the ions, thereby avoiding electrochemical corrosion; moreover, no special equipment is needed during operation according to the preparation method, the materials are easily obtained, and the corrosion inhibitor has a good application prospect.