200 results about "Galvanic corrosion" patented technology

The invention relates to the field of medical instruments, in particular to a heart valve. The invention provides a heart valve. The heart valve comprises a stent body, a skirt edge and developing points. The skirt edge is connected to the bracket body; the skirt edge comprises an inner skirt edge and an outer skirt edge; the inner skirt edge and the outer skirt edge form an interlayer; the developing points are arranged in the interlayer; the number of the developing points is at least two; at least two developing points are in the same or different annular cross sections. Developing points are arranged in an interlayer; the setting mode can physically isolate the developing point, and the direct contact between the bracket and the developing point is eliminated through physical isolation; the galvanic corrosion risk can be effectively avoided, and the service life of instruments is prolonged; the metal ion release risk is reduced, and the biological safety is improved. And the developing points are arranged in the interlayer between the inner skirt edge and the outer skirt edge, so that the overall position of the valve can be reflected more accurately.

The invention discloses a high-corrosion-resistance magnesium alloy and a preparation method and application thereof, and belongs to the technical field of magnesium alloys, the high-corrosion-resistance magnesium alloy is based on multi-element rare earth microalloying and dispersed Mg17Al12 phase synergistic regulation, in the high-corrosion-resistance magnesium alloy, a fine dispersed Mg17Al12 second phase is evenly distributed in a whole magnesium matrix, and the high-corrosion-resistance magnesium alloy has the advantages that the high-corrosion-resistance magnesium alloy is obtained; the magnesium alloy has the beneficial effects that the magnesium alloy is good in corrosion resistance, uniform corrosion of a magnesium matrix is promoted, and the micro-galvanic corrosion effect between the Mg17Al12 phase and the magnesium matrix is greatly weakened, so that serious local corrosion of the magnesium alloy in a traditional AZ91 alloy is converted into a uniform corrosion behavior, and the corrosion resistance of the magnesium alloy is greatly improved.

The invention discloses a material tensile strength testing device suitable for a high-humidity and high-salt environment, the material tensile strength testing device comprises a box body, two connecting plates are fixedly connected to the rear side, close to the top, of an inner cavity of the box body, the two connecting plates are arranged in a bilateral symmetry mode, and two concentric-square-shaped frames are jointly and fixedly connected between the two connecting plates; through mutual cooperation of a driving gear, a concave mounting plate, an A-shaped mounting plate, a driving motor, a cleaning gear, an inner gear ring and the like, the outer surface of a reinforcing steel bar can be pretreated, and the situation that a test result is affected by corrosion of the surface of the reinforcing steel bar is prevented; through mutual cooperation of a component moving motor, a connecting plate, a double-thread lead screw, a moving block, a salt spray test box, a linkage rod, absorption cotton and other components, when a steel bar is tested in a continuous salt spray environment, salt spray liquid drops are attached to the outer surface of the steel bar, so that the surface of a sample is condensed; a local electrolyte membrane can be prevented from being formed on the surface of the steel bar to accelerate pitting corrosion or galvanic corrosion.

The purpose of one aspect of the present disclosure is to provide a connector capable of suppressing galvanic corrosion between terminals. This connector is provided with: a plate-shaped first terminal (21) having a mounting hole (27); a second terminal (51); a relay terminal (30) provided between the first terminal and the second terminal; and a bolt member (40) for fastening and fixing the first terminal, the second terminal, and the relay terminal. The first terminal (21) and the second terminal (51) are formed of different metals from each other. The relay terminal (30) is formed of a metal having an ionization tendency that is intermediate between the first terminal (21) and the second terminal (51). The first terminal (21) has an oxide film on the surface of the first terminal (21) including the inner peripheral surface of the mounting hole (27). The relay terminal (30) has a press-fit fixing part (32) that is press-fitted and fixed to the mounting hole (27). The press-fit fixing part (32) has: an insertion part (34) that is inserted into the mounting hole (27); and a protruding part (35) that protrudes from the outer peripheral surface of the insertion part and scrapes the oxide film on the inner peripheral surface of the mounting hole.

A heavy-duty surface mount post system includes a post base with a mounting member and a post designed to slide over the tube. Shims are mounted between the mounting member and the post to create a tighter fit and to resist galvanic corrosion when the base and post are made of different materials, such as steel and aluminum. Optional decorative skirts provide additional stability and aesthetic appeal. The system is ideal for fencing installations on concrete or other solid surfaces, accommodating a range of tolerances while simplifying assembly.

Provided is a downhole tool, a well system, and a method. The downhole tool, in one aspect, includes an expandable metal member positioned about a structure, the expandable metal member comprising a metal configured to expand in response to hydrolysis. The downhole tool, in accordance with this embodiment, further includes a dissimilar cathodic electric conductor isolated within the expandable metal member, the dissimilar cathodic electric conductor configured to initiate a galvanic corrosion effect to increase an expansion rate of the expandable metal member when a reactive fluid comes into contact with the dissimilar cathodic electric conductor and the expandable metal member.

The invention relates to a low-cost high-strength corrosion-resistant magnesium alloy and a preparation method thereof. The magnesium alloy comprises the following components in percentage by mass: 6-11% of Al, 0.4-0.6% of Zn, 0.2-0.6% of Mn, 0.2-0.4% of Y, 0.2-0.6% of Ca and the balance of Mg and inevitable impurities. A small amount of Ca and Y elements are added, on one hand, an alpha-Mg matrix structure can be refined, beta phase distribution is more uniform, and the mechanical property is improved; and on the other hand, the solid solubility of the alloy element Y in an alpha-Mg matrix can be improved by adding the Ca element, the compactness of a surface oxidation film and a corrosion product film is promoted, compared with other rare earth elements, the potential difference between Al-Ca and Al-Y phases formed by Ca, Y and Al and the magnesium matrix is smaller, micro galvanic corrosion is smaller, and the corrosion resistance of the alloy is remarkably improved.

The invention relates to the technical field of fine chemical engineering, and discloses a fuel cell cooling liquid and a preparation method thereof, and the preparation method comprises the following steps: preparation of a basic liquid, construction of a corrosion inhibition system, ion inhibition treatment, addition of a functional auxiliary agent and post-treatment. According to the composite corrosion inhibitor, zinc ions are anchored to gap sites of a silicate framework through the surface loading effect of sodium silicate and nano-zinc oxide under the shear dispersion condition, a compact composite passivation film is formed on the surface of a metal pipeline, and an electrode potential active area is covered; meanwhile, molybdate ions are subjected to a self-repairing reaction at the defect position of a passivation film preferentially by virtue of the oxidation-reduction characteristic of the molybdate ions, and formation of a galvanic corrosion microbattery is blocked by dynamically filling microcracks, so that the integrity of a corrosion inhibition system is improved; all the components of the composite corrosion inhibitor generate a synergistic effect in a specific proportion, so that the cooling liquid can maintain stable corrosion resistance for a long time.

The utility model discloses a bolt, a connecting structure of a magnesium alloy component and an electric drive assembly, and relates to the technical field of automobiles. Or, the bolt comprises a bolt body and a coating layer arranged on the surface of the bolt body, and the coating layer comprises a flame-retardant magnesium alloy coating. When the bolt provided by the utility model is used for connecting a magnesium alloy component and other components made of dissimilar materials, the overall potential difference can be greatly reduced, so that the galvanic corrosion degree is reduced. Therefore, the problem that galvanic corrosion is prone to being generated when the speed reducer shell made of magnesium alloy and the all-in-one machine shell made of aluminum alloy are connected through the steel bolts can be solved.

This invention provides an engine valve and a method for manufacturing the same, which can suppress galvanic corrosion even when dissimilar metals are joined, and which exhibits excellent wear resistance and corrosion resistance, for use in engines that use CNG, LPG, or alcohol as fuel. [Solution] The engine valve 10 of the present invention is a joint member in which a shaft portion 14 made of martensitic heat-resistant steel SUH11 and a umbrella portion 12 made of austenitic heat-resistant steel SUH35 are joined. A nitride layer is formed only on the surface of the base material on the shaft portion 14 side from the joint portion 13 between the shaft portion 14 and the umbrella portion 12, leaving the surface of the base material exposed on the umbrella portion 12 side from the joint portion 13.

The invention aims to provide an insulating composite ceramic coating with high impact resistance and a preparation method of the insulating composite ceramic coating. The coating is based on nano-agglomerated AlO-3 wt.% TiO composite powder; a double-stage atmospheric plasma spraying process is adopted to directly prepare on a stainless steel substrate under the condition that a metal bonding layer is not prepared in advance: in the first stage, a strong bonding bottom layer is formed at relatively high power, and in the second stage, a nano-structure working layer is constructed at optimized power. In addition, a functional additive accounting for 0.5-3% of the total mass of the powder is externally doped to carry out laser remelting treatment on the coating so as to further densify the coating. Through component compounding and process gradient design, the contradiction that high insulativity and high toughness of the coating are difficult to consider at the same time is successfully solved, and the prepared coating has high hardness, high fracture toughness, high bonding strength and excellent impact resistance and insulation performance; and a long-acting and reliable solution is provided for galvanic corrosion protection of dissimilar metal connecting parts in the marine environment.

The application relates to the technical field of electrical connection equipment, and discloses a high-current small bus plug-in box rotary plug, which is used to solve the problems that the structure of key conductive components is single, the setting space is cramped, the conductive temperature rises fast, and the components are prone to aging in the prior art. The application is characterized in that the space of the regular octagonal flame-retardant PC shell and the insulating partition plate is optimized, the T2 oxygen-free copper Z-shaped large-section pin array is symmetrically arranged, the uniform contact pressure guaranteed by the spring assembly is matched, the conductive cross-sectional area is 2-3 times higher than that of the traditional reed structure, the galvanic corrosion of dissimilar metals is effectively avoided, the current-carrying capacity and the current transmission stability are greatly improved, the multidirectional heat exchange channels formed by the regular octagonal included angle, the pin array bending gap and the internal cavity are combined, the separation and heat dissipation of the insulating partition plate are combined, the cold and hot air efficient convection is realized, and the temperature rise of the key components is significantly reduced.

This invention relates to the field of zinc alloy surface modification technology, and particularly to a corrosion-resistant medical zinc alloy, its preparation method, and its applications. The preparation method includes the following steps: weighing raw materials according to the chemical composition of the zinc alloy; cleaning the surface of the raw materials; smelting, refining, and casting to obtain an ingot; subjecting the ingot to equal-channel angular extrusion deformation to obtain an extruded zinc alloy; performing high-energy ion implantation on the zinc alloy to obtain a nitrogen-ion-implanted zinc alloy; and preparing a coating on the surface of the nitrogen-ion-implanted zinc alloy to obtain the final product. This invention achieves a high-adhesion, dense, and uniform deposition effect on the alloy surface through the synergistic control of "equal-channel angular extrusion + high-energy nitrogen ion implantation + biomimetic coating deposition," solving the problem of severe galvanic corrosion at localized sites in existing zinc alloys under corrosive environments. Simultaneously, the dense deposition layer helps inhibit rapid dissolution of the zinc alloy surface, significantly reducing the corrosion rate of the zinc alloy in corrosive environments.

The invention relates to the technical field of vehicles, and discloses a circuit conduction assembly and a vehicle, the circuit conduction assembly is suitable for being electrically connected with a vehicle body conductive part, the vehicle body conductive part comprises a first element, and the standard electrode potential of the first element is E1; comprising a conductive terminal, the conductive terminal comprises a second element, the standard electrode potential of the second element is E2, and E2 is larger than E1; the insulating part is arranged between the vehicle body conductive part and the conductive terminal in an insulating manner so as to prevent direct contact between the vehicle body conductive part and the conductive terminal; and the conduction piece is connected with the vehicle body conductive part and the conductive terminal and comprises a third element, the standard electrode potential of the third element is E3, and E3 is larger than E1 and smaller than E2. According to the circuit conduction assembly provided by the invention, the conductive part of the vehicle body is isolated from the conductive terminal by using the insulating part, the occurrence of galvanic corrosion is inhibited, the conduction part is used as a bridge of a current path, and the conduction part selects a third element of which the standard electrode potential E3 is between E1 and E2, so that the occurrence probability of galvanic corrosion is reduced.

The invention relates to an aluminothermy welding flux for a zinc-clad steel grounding material and a welding method of the aluminothermy welding flux, and belongs to the technical field of metal material welding. In order to solve the core technical problem that joint potential matching and welding firmness compatibility are difficult to realize by an existing aluminothermy welding flux for the zinc-clad steel grounding material, the invention provides the aluminothermy welding flux for the zinc-clad steel grounding material. The aluminothermy welding flux comprises iron oxide powder, aluminum powder, tin powder and nickel powder. According to the invention, the iron-based welding flux is compounded with tin and nickel, and the tin and the nickel have a synergistic effect, so that the technical prejudice that the iron-based welding flux is difficult to adapt to zinc-clad steel welding in the field is overcome, and the unexpected technical effect is realized. The tensile strength of the connector is larger than or equal to 620 MPa, the corrosion rate is smaller than 0.05 mm / year, the conductivity loss is smaller than 5%, and the performance is obviously superior to that of a copper-based connector. The problem of compatibility of potential matching and welding firmness is fundamentally solved, galvanic corrosion is eliminated, the process is simple and convenient, the cost is controllable, and corrosion prevention and engineering reliability are greatly improved.

The invention discloses a galvanic corrosion risk assessment method and device for a dissimilar metal lap joint structure, and relates to the technical field of corrosion protection, and the method comprises the steps: obtaining standard polarization curves of a plurality of metal materials for the power system design of aviation equipment, so as to form a polarization curve library; determining a first metal material and a second metal material which form the to-be-evaluated dissimilar metal lap joint structure; acquiring a first standard polarization curve of the first metal material and a second standard polarization curve of the second metal material from a polarization curve library to determine the standard galvanic corrosion current density of the lap joint structure of the galvanic anode metal material and the dissimilar metal to be evaluated; determining a target corrosion rate of the galvanic couple anode metal material; and based on the target corrosion rate, determining a galvanic corrosion risk assessment result of the to-be-assessed dissimilar metal lap joint structure. The technical problem of low efficiency of a galvanic corrosion risk assessment mode in related technologies is solved, and the technical effect of improving the efficiency of galvanic corrosion risk assessment is achieved.

The application discloses a kind of corrosion-resistant condensing heat exchanger, including: by cooling pipe component, fixed to the header of the tube component both ends, with the condensate reservoir of the tube component connection, with the tube component both ends connection pipe joint.The application also discloses a kind of corrosion-resistant condensing heat exchanger manufacturing method, the method includes the following steps: before pipe head implements welding operation, pipe head is partitioned and identified;When welding, according to the window of welding protection and deformation prevention tool design, symmetric welding is carried out;After welding is completed in window, window is rotated, and then continue welding;According to the sequence of installation tool, protection gas is filled, welding window is opened, symmetric welding, tool rotation degree, alternate welding;By detecting and judging welding quality to weld joint.The whole condensing heat exchanger of the application adopts titanium alloy one kind of material to avoid galvanic corrosion, adopts fusion welding to avoid weak link such as brazing filler metal, realizes excellent corrosion resistance in long-term operation process.

The invention discloses a vehicle driving motor shaft voltage and bearing electrocorrosion detection system and method, a medium and equipment, and the system comprises an induction ring which is used for detecting a shaft voltage original signal; the radio frequency current transformer is used for detecting a bearing current original signal; the temperature sensor is used for monitoring the bearing temperature; the rotating speed / position sensor is used for detecting the motor rotating speed torque of the driving motor; the data acquisition module is used for acquiring a shaft voltage original signal, a bearing current original signal, a bearing temperature and a motor rotating speed torque, and performing analog-to-digital conversion on the shaft voltage original signal, the bearing current original signal, the bearing temperature and the motor rotating speed torque; and the detection module is used for analyzing the shaft voltage digital signal and the bearing current digital signal which are obtained through analog-to-digital conversion, and determining a bearing electrocorrosion risk coefficient of the driving motor and a corresponding risk level according to an analysis result and a bearing temperature value and a motor rotating speed torque value which are obtained through analog-to-digital conversion by utilizing a risk fusion evaluation model.

The invention discloses a galvanic corrosion test system for simulating a high-temperature steam-water environment. The galvanic corrosion test system comprises an experiment barrel, a dissolved oxygen monitoring unit and a temperature, pH and conductivity monitoring unit, a barrel cover is mounted at the top of the experiment barrel, a working electrode clamp is mounted in the experiment barrel, a working electrode groove is formed in the working electrode clamp, a working electrode is mounted in the working electrode groove, and a galvanic corrosion reaction is carried out in the experiment barrel; the dissolved oxygen monitoring unit comprises an oxygen conveying pipe connected to the experiment barrel, and oxygen is input into the experiment barrel through the oxygen conveying pipe, so that the dissolved oxygen amount of the electrolyte is increased; the device further comprises a dissolved oxygen monitor, the electrolyte in the experiment barrel is input into the dissolved oxygen monitor to monitor the dissolved oxygen amount in real time, and the electrolyte in the dissolved oxygen monitor is monitored and then flows back into the experiment barrel. The temperature, pH and conductivity monitoring unit comprises a temperature sensing electrode, a pH sensing electrode and a conductivity sensing electrode which are connected to the experiment barrel and are respectively used for monitoring the temperature value, the pH value and the conductivity value of the electrolyte.

The application relates to a nano cerium oxide reinforced biological magnesium alloy and a preparation method thereof, and belongs to the technical field of medical implant material preparation. The biological magnesium alloy is composed of a magnesium matrix, an aluminum-cerium phase and nano cerium oxide, and the preparation method is as follows: (1) nano cerium oxide and AZ61 magnesium alloy powder are mixed by ball milling under an argon atmosphere according to a designed proportion to obtain uniformly dispersed mixed powder; and (2) the above mixed powder is used as raw material to prepare the nano cerium oxide reinforced biological magnesium alloy by using a selective laser melting technology under an argon atmosphere. In the application, part of the nano cerium oxide is reduced into cerium by magnesium, the cerium combines with aluminum in the matrix to form an aluminum-cerium phase, magnesium-aluminum phase precipitation is inhibited, and micro-galvanic corrosion can be inhibited; meanwhile, the remaining nano cerium oxide falls off into a degradation product film after the magnesium matrix is degraded, the compactness of the product film is increased, the invasion of an erosion liquid is blocked, and the degradation resistance of the magnesium alloy is improved in a synergistic manner by inhibiting galvanic corrosion and increasing the compactness of the degradation product film.

The utility model relates to the technical field of vehicles, in particular to a vehicle. The embodiment of the utility model provides a vehicle. The vehicle comprises a front anti-collision beam, a vehicle body and a connecting assembly. The front anti-collision beam comprises a front anti-collision beam body and two connecting arms, the two connecting arms are connected to the two ends of the front anti-collision beam respectively in the left-right direction of the vehicle, and each connecting arm extends in the front-back direction of the vehicle; the vehicle body comprises two vehicle body longitudinal beams, the two vehicle body longitudinal beams are arranged in a spaced mode in the left-right direction and extend in the front-back direction, and a connecting column is arranged at the front end of each vehicle body longitudinal beam; the number of the connecting assemblies is two, and each connecting assembly is detachably connected between the corresponding connecting arm and the corresponding connecting column. Galvanic corrosion between the anti-collision beam and a vehicle body is reduced, and the service life of vehicle body parts is prolonged.

To provide a screw fastening structure using a flange cover which implements prevention of galvanic corrosion in a fastening structure for a screw with high versatility.SOLUTION: A screw fastening structure (TK) using a flange cover comprises: a conductive screw member (2); a flange cover (1) mounted at a peripheral edge of a flange (22) or a head (21) of the screw member; a substrate (4) including a first through hole (4b) that a shank (23) of the screw member can pass; a conductive plate (3) including a second through hole (31a), that the shank can pass, electrically connected to a wiring pattern (4c) and disposed on the side of a first face (4e) of the substrate; and a female screw member (5) disposed on the side of a second face (4f) of the substrate. In a screw fastened state where the screw member to which the flange cover is mounted is passed through the second through hole and the first through hole and threaded to the female screw member (5), the flange or the head of the screw member is in contact with the plate in a contact portion, and the flange cover is adhered to the substrate or the plate while enclosing the contact portion.SELECTED DRAWING: Figure 2B

The application discloses an antibacterial composite metal coating based on protective area etching and galvanic corrosion and a preparation method and equipment thereof, and the method comprises the following steps: 1) forming a composite coating by vapor depositing a metal transition layer with a standard electrode potential higher than silver, a silver island intermediate layer and electrochemically depositing a silver layer on the surface of a pretreated titanium-based equipment; 2) performing isolation line etching on the outside of the coating area boundary of the equipment surface by laser; 3) preparing a hydrophobic protective coating on the surface of the reserved coating area; 4) filling paraffin in the isolation line groove to form a temporary hole sealing layer; 5) immersing the equipment in an acidic electrolyte to selectively dissolve the coating in the to-be-stripped area in a sectional stripping mode; 6) removing the paraffin in the isolation line groove and performing trimming by laser; and 7) obtaining the coating material after mechanical polishing, cleaning, drying, vacuum packaging and radiation sterilization. The high-strength coating can realize efficient sterilization through the galvanic corrosion effect and prevent coating abrasion during use.

The present application relates to the field of terminals and discloses a magnesium alloy connection structure, an electronic device, and a component forming method. The magnesium alloy connection structure comprises a magnesium alloy body and a conductive layer, and a conductive transition layer is formed at the junction of the magnesium alloy body and the conductive layer. The transition layer enables electrical connection between the magnesium alloy body and the conductive layer. At the same time, the transition layer separates the magnesium alloy body and the conductive layer to avoid galvanic corrosion between the magnesium alloy body and the conductive layer, thereby extending the service life of the magnesium alloy connection structure and achieving stable electrical connection between the magnesium alloy structure and components such as the motherboard. Furthermore, the conductive layer, sealing material, and transition layer isolate the magnesium alloy body from the outside, preventing oxidation or corrosion of the magnesium alloy body and further preventing galvanic corrosion between the various structures in the magnesium alloy connection structure.

An opening is formed within a dielectric material overlying a semiconductor substrate. The opening may comprise a via portion and a trench portion. During the manufacturing process a treatment chemical is placed into contact with the exposed surfaces in order to release charges that have built up on the surfaces. By releasing the charges, a surface change potential difference is reduced, helping to prevent galvanic corrosion from occurring during further manufacturing.

An integrated circuit package includes a substrate, a semiconductor interposer on the substrate, and a first integrated circuit chip on the interposer. The interposer includes a galvanic effect test structure including a test contact pad and a detection contact pad. The interposer includes a plurality of primary contact pads electrically coupled to the first integrated circuit chip. The galvanic effect structure can be utilized to test the interposer for galvanic corrosion prior to assembling the interposer into the integrated circuit package.

The invention belongs to the technical field of material corrosion testing, and particularly relates to a ferromagnetic metal corrosion test piece non-contact fixing device which mainly structurally comprises main magnet units arranged on the upper side and the lower side of a test piece, auxiliary magnet units arranged at the corners of the main magnet units and a laser displacement sensor arranged at the upper auxiliary magnet unit. The main magnet unit provides basic electromagnetic suspension force and balances the gravity of a test piece, the laser displacement sensor, the power amplifier and the PID controller are matched, and the auxiliary magnet unit performs electromagnetic force compensation and performs real-time fine adjustment on the position of the test piece, so that the test piece is kept in a stable suspension state; controllable electromagnetic force is applied to a ferromagnetic metal test piece through an electromagnet, so that the test piece is kept in a non-contact stable suspension state in a corrosion environment, the problems of galvanic corrosion, crevice corrosion and other abnormal local corrosion caused by a contact fixing mode are avoided, and the accuracy of material corrosion rate measurement is improved; the system has the advantages of high control precision, low power consumption and high environmental applicability.

This invention belongs to the field of metal material processing and provides a low-alloy, high-corrosion-resistant magnesium alloy and its preparation method. The magnesium alloy composition, by mass percentage, includes: Ca: 0.05-0.5%, In: 0-1.0%, rare earth elements: 0-2.0%, unavoidable impurities ≤0.03%, and the balance being Mg; the rare earth elements are one or any combination of Gd, Dy, Ho, Tm, Er, and Sc. The magnesium alloy preparation method includes atmosphere-protected melting, sub-rapid solidification, homogenization, multi-pass rolling, and recrystallization annealing. This invention reduces impurity phases and second phases, obtains a fully recrystallized fine-grained structure, effectively eliminates dislocations and residual stress, ultimately reduces galvanic corrosion and cathodic hydrogen evolution reaction, significantly improves the passivation ability of the film, promotes uniform corrosion, and enhances film continuity, thereby achieving excellent corrosion resistance.

The utility model provides a contact device, a relay and electric equipment. Relates to the technical field of electronic devices. The contact device comprises a contact body, a contact piece and a connecting piece. The contact element is connected with an external circuit; one of the contact piece and the contact body is a copper piece, and the other one of the contact piece and the contact body is an aluminum piece; the connecting piece is arranged between the contact body and the contact piece. The contact body and the contact piece are connected into a whole through the connecting piece, so that the problems of corrosion of a primary battery and difficult combination caused by direct contact of the contact piece and the contact body are avoided, the conductivity between the contact piece and the contact body is ensured, the connection strength of the contact piece and the contact body is improved, the service life of the contact device is prolonged, and the service life of the contact device is prolonged. The connection resistance between the contact device and the busbar is reduced, and the use performance of the contact device is improved.

The application discloses a kind of based on the deconvolution technology's automobile dissimilar metal galvanic compatibility evaluation method, comprising the following steps: for dissimilar metal A material, through basic electrochemical parameters, including solution pH value, oxygen content, metal ion initial content etc. Information, the equilibrium potential of cathode reaction and anode reaction is calculated;Step defines the Tafel slope of oxygen and H+ reduction reaction, exchange current density and limiting diffusion current density parameter, and the cathode polarization curve of oxygen and H+ reduction is fitted.The application is suitable for corrosion protection technical field, relates to the galvanic corrosion compatibility evaluation method of dissimilar metal connecting structure in automobile, and the deconvolution technology is integrated into dissimilar metal galvanic compatibility evaluation, can significantly shorten experimental period, realizes the evaluation fast of dissimilar metal galvanic compatibility in automobile.