175 results about "Cathodic protection" patented technology

The utility model provides a cathode protection device for a pipeline, and belongs to the technical field of cathode protection. The cathodic protection device for the pipeline comprises a bottom plate and a mounting box, the mounting box is mounted at the top of the bottom plate, a lead screw is rotatably mounted on the inner wall of the mounting box, a connecting sleeve is mounted on the surface of the lead screw, a connecting frame is mounted at the bottom of the connecting sleeve, a clamping frame is mounted at the bottom of the connecting frame, and the clamping frame is mounted at the bottom of the connecting frame. A through groove is formed in the bottom of the inner wall of the mounting box, the clamping plate is mounted on the inner side of the clamping frame, the clamping plate is arranged in an arc shape, and a cathode mounting piece is mounted on the inner side of the clamping plate. And the protection mechanism clamps the pipeline, and the situation that when welding and other modes are adopted for connection, the pipeline needs to be manually treated, and much time is wasted is avoided.

A coated steel sheet providing cathodic protection and suitable for manufacturing a press hardened part with good powdering resistance during press-hardening and good corrosion performance. A method for the manufacture of hardened parts starting from a steel sheet coated with a metallic coating. The part has good characteristics with respect to corrosion and powdering resistance. The present disclosure is particularly well suited for the manufacture of automotive vehicles.

The application discloses a method for monitoring and controlling corrosion environment of an underwater concrete structure in a brackish water area, and the method comprises the following steps: laying a monitoring system, monitoring the concentration of chloride ions, analyzing data of the distribution of the concentration of chloride ions, dividing the area according to the concentration of chloride ions, adjusting an impressed current, and giving a warning of the corrosion environment; the brackish water area is divided into a constant saltwater area, a constant freshwater area and a brackish water interface change area by continuously collecting data of the concentration of chloride ions and constructing a concentration field and a gradient field model, so that the risk degree of the corrosion environment can be directly reflected, and the cathodic protection parameters can be dynamically adjusted according to the real-time corrected chloride ion concentration field model, thereby realizing the intelligent monitoring, early warning and control of the corrosion environment of the underwater concrete structure in the brackish water area.

Provided herein are non-invasive and non-destructive methods for classifying the type of external corrosion defect and the severity thereof in the cathodic protection system on a buried pipeline. Mathematical tools and algorithms are utilized to classify the type and the severity of the corrosion defect.

This invention relates to a spindle assembly for a drum-shaped filter screen, comprising: a spindle, a first bearing, a first bearing housing, a second bearing, a second bearing housing, a first brush shaft, a first brush holder, a second brush shaft, and a second brush holder. The first brush holder is sealed to the side of the first bearing housing opposite to the second bearing housing. One end of the first brush shaft is connected to the fixed end of the spindle, and the first brush shaft is located inside the first brush holder. A first current collector flange is provided on the outer wall of the first brush holder. The second brush holder is sealed to the side of the second bearing housing opposite to the first bearing housing. One end of the second brush shaft is connected to the floating end of the spindle, and the second brush shaft is located inside the second brush holder. A second current collector flange electrically connected to the second brush shaft is provided on the outer wall of the second brush holder. The cathodic protection system and the potential measuring device can be independently electrically connected to the spindle via the first brush shaft and the second brush shaft, respectively, thus the potential measuring circuit is not affected by the cathode busbar circuit.

Cathodic protection of steel in a concrete column in sea water is simplified by providing a pre-assembled unit including a jacket to surround the column carrying a bulk sacrificial anode outside the jacket and optionally an inner sacrificial anode with a cast grout inside the jacket. The jacket can also include a pre-assembled junction box and couplings to connect to the steel. The jacket is attached to the surface of the column at the water line so that the bulk anode is located below the surface of the water. The bulk anode can be formed of aluminum so as to be less toxic in sea water. An activator is applied inside the jacket either as a wicking layer or as a chemical activating material. The jacket can act only as a form work which is then removed after casting of the grout.

An anode apparatus for mounting on an external surface of a concrete structure to provide cathodic protection of metal members in the concrete uses a pre-assembled body which is typically elongate carrying a longitudinal anode, which can be sacrificial or impressed current, together with a supporting material having a front face for attachment to the surface and an impermeable plastic covering material at the rear face covering the anode and the supporting material when the front face is attached to the surface of the concrete. A channel defined on the front face is arranged to receive a layer of a conformable ionically conductive adhesive material for attachment to the external surface. A distance of the edge of the covering material is arranged to be similar to a distance of the metal from the external surface such that wetting and drying effects of environmental moisture are the same for the anode as for the metal components. 20 25 20 17 30 11 M ar 2 02 5 A B S T R A C T 2 0 2 5 2 0 1 7 3 0 1 1 M a r 2 0 2 5 m a t e r i a l w h e n t h e f r o n t f a c e i s a t t a c h e d t o t h e s u r f a c e o f t h e c o n c r e t e . A c h a n n e l

The application discloses a kind of critical conductivity simulation calculation method and system of chain structure impressed current protection, by building COMSOL simulation model, according to wire diameter, chain structure size, metal material conductivity, set current physical field related parameters in COMSOL software, for simulating calculation under different conductivity caused potential attenuation;According to the seawater conductivity obtained in test, the conductivity of metal material, polarization curve, set the secondary current distribution physical field related parameters in COMSOL software, and combine the potential attenuation obtained in current physical field as boundary condition simulation potential distribution under steady state in seawater, if potential distribution reaches the requirement of protection potential, the conductivity corresponding to potential attenuation at this time is critical conductivity.The method can accurately and conveniently evaluate the critical conductivity of chain structure impressed current cathodic protection, and provide a reference for the design of chain structure impressed current cathodic protection system.

The application discloses a kind of light-assisted anticorrosion coating materials and preparation method based on metal coordination structure, the light-assisted anticorrosion coating material is on the basis of traditional anticorrosion metal zinc layer continue to be coordinated with the metal coordination polymer Co (bpy) (dhbq) (bq) with photoelectric conversion capability, and form coordination complex Co (bpy) (dhbq) (bq) @Zn.Because metal coordination polymer Co (bpy) (dhbq) (bq) itself can additionally generate photo-generated electron and photo-generated current after being illuminated, provide redundant charge for Zn layer, make it be in lower potential, strengthen the function of cathodic protection.Corrosion can be inhibited through this mechanism, prolong the service life of Zn layer, provide efficient, green anticorrosion protection for the steel material that needs to be protected.In addition, metal coordination light-assisted anticorrosion technology can also inhibit marine bioattachment by slowly releasing metal ions Co, prevent biofilm formation, reduce microbial growth, prolong the service life of protected material in marine environment, also applicable to underwater bioinduced corrosion and the protection of fouling metal structure.

The application belongs to the technical field of corrosion protection, and relates to a preparation method of an anti-corrosion filling material, in particular to a preparation method of hydroxylated titanium dioxide and application thereof. The preparation method of the hydroxylated titanium dioxide comprises the following steps: placing raw material nano-titanium dioxide in a KOH solution with a pH value of 11-13, and carrying out hydrothermal reaction at 180-200 DEG C for 24-36 h to obtain the hydroxylated titanium dioxide. The hydroxylated titanium dioxide prepared by the method has better bonding force with the adhesive paste, the prepared photoelectrochemical cathodic protection adhesive paste is not easy to be pulverized, and has long-time photoelectrochemical cathodic protection capacity.

The invention discloses an anti-corrosion device for a directly-buried steam pipeline, and relates to the technical field of pipeline corrosion prevention. According to the scheme, the device comprises a connecting mechanism used for being fixed to the outer wall of the steam directly-buried pipeline in a hooping mode; the closed box body is arranged on the connecting mechanism, the closed box body comprises an underground closed pipe located under the ground and an overground maintenance box body located on the ground, and the underground closed pipe is in sealing fit with the outer wall of the steam directly-buried pipeline through a sealing ring to form a closed cavity; the sacrificial anode is arranged in the overground maintenance box body; and the electrode assembly is arranged in the closed cavity and used for being electrically connected with the outer wall of the steam directly-buried pipeline and the sacrificial anode to form a cathode protection loop. By arranging the connecting mechanism composed of the pipe clamping piece with the bottom of the arc-shaped structure and the frame-shaped connecting plate, during installation, only limited excavation needs to be conducted on the two sides of the pipeline, and the earthwork excavation volume and the influence of construction on pipeline operation are greatly reduced.

The application discloses a tension type impressed current cathodic protection system, which comprises a composite cable made of a steel core aluminum stranded wire with an outer sheath, a first insulation connecting structure arranged at the upper end of the composite cable and used for insulatingly connecting the composite cable with a member to be protected, a cable branch structure arranged at the upper end of the composite cable and used for electrically connecting the composite cable with a power control cabinet, an auxiliary anode arranged on the composite cable and used for releasing current, and a second insulation connecting structure arranged at the lower end of the composite cable and used for insulatingly connecting the composite cable with a gravity foundation. The tension type impressed current cathodic protection system disclosed by the application has the advantages of light weight and low price compared with the existing composite cable copper as a power line under the same current carrying requirement, and the production processing technology of the steel core aluminum stranded wire is simplified as the steel core aluminum stranded wire only needs to be coated with a wear-resistant sheath.

This utility model discloses a cathodic protection device for buried natural gas pipelines, comprising a pipeline body, a sacrificial anode layer, and a cathodic protection structure. The sacrificial anode layer is wrapped around the pipeline body, and the cathodic protection structure is disposed on the sacrificial anode layer. The cathodic protection structure further includes an external intelligent power supply unit and a discharge unit, the external intelligent power supply unit being disposed on the sacrificial anode layer, and the discharge unit being disposed on the sacrificial anode layer. This utility model belongs to the field of pipeline cathodic protection technology, specifically referring to a cathodic protection device for buried natural gas pipelines. It effectively solves the problems of rapid anode material consumption, increased maintenance costs and workload, and insufficient protection in some areas of the pipeline due to uneven anode distribution or soil environmental differences, affecting the uniformity of the protection effect.

This invention relates to a ground marking and cathodic protection integrated intelligent monitoring system for oil and gas pipelines, comprising a polarized test piece soil reference tube, a self-corroding test piece soil reference tube, a Mark signal sensor, a power supply, and a data acquisition recorder. The data acquisition recorder is equipped with a GPS positioning module and a communication module; the power supply has a low voltage warning function; the data acquisition recorder collects and processes cathodic protection parameters, stray current interference data, and pipeline corrosion rate monitored by the polarized test piece soil reference tube, self-corrosion potential monitored by the self-corrosion test piece soil reference tube, and low-voltage alarm signals output by the power supply, and also processes the electrical signals output by the Mark signal sensor to generate positioning commands that trigger the GPS positioning module to output position signals; this invention achieves high efficiency, high precision, high integration, and high intelligence in oil and gas pipeline operation and maintenance management, improving the accuracy of pipeline corrosion detection and cathodic protection detection and the level of intelligent management.

An example protective structure for use in an impressed current cathodic protection (ICCP) system to protect a substrate from corrosion includes: a covering anode layer configured to act as an anode in the ICCP system and configured to be interconnected with an electron source configured to provide electrons to the substrate; and a protective layer configured to space the covering anode layer from the substrate; wherein the structure is permeable to an electrolyte to complete the electrochemical cell of the ICCP system.

The utility model relates to pipeline anticorrosion technical field, especially a kind of cathodic protection test pile structure, including support pipe;Support pipe inside upper end is equipped with terminal block;The four terminal ends of terminal block back surface are respectively used to be connected with the four detection lines that go up into from the lower end of support pipe, and the two terminal posts of terminal block surface are respectively used to be connected with the terminal pen of multimeter;Support pipe upper end is equipped with the protection cover of barrel shape;The position of support pipe opposite terminal block surface is equipped with let position opening, and the position of protection cover opposite let position opening is equipped with operation opening and is hingedly installed with cover plate;It is equipped with mounting pipe in support pipe, and the inner peripheral wall of mounting pipe has two protruding blocks, and the mounting protruding block formed by protruding on the upper end both sides of terminal block is respectively hung and installed on protruding block;The utility model has the characteristics that terminal block can be more conveniently installed and disassembled, and better sealing effect can be achieved.

The utility model discloses a cathode protection intelligent test pile, which comprises a pile body, the lower end of the pile body is fixedly connected with a base, a plurality of groups of slideways are processed at the lower end of the base, the lower ends of every two groups of slideways are respectively connected with corresponding extension plates in a sliding manner, threaded holes are processed on the surfaces of the plurality of extension plates, and the threaded holes are communicated with the slideways. A threaded hole is machined in the surface of the base, and the diameter of the threaded hole in the surface of the base is consistent with that of the threaded hole in the surface of the extension plate. Through the arrangement of the pile body, the base, the extension plates, the slideways and the threaded holes, when the test pile needs to be fixed on the outdoor ground, an operator pulls out the four extension plates below along the slideways, and then screws eight fixing bolts into the threaded holes in the surfaces of the base and the extension plates; the base and the extension plate are divided into an inner layer and an outer layer through the fixing bolts to be fixed to the ground, so that the situation that the test pile topples over in severe weather such as strong wind is avoided, and the working effect of the intelligent test pile is improved.

The utility model relates to the technical field of pipeline protection, and particularly discloses a concealed self-detection test box for cathode protection, which comprises a body, the body is provided with an accommodating chamber with a top opening, the inner wall of the accommodating chamber is provided with a test terminal, the test terminal is connected with a pipeline through a test cable, and a test pipeline extending out of the body is arranged in the accommodating chamber; the cover plate covers the top of the body through a connecting piece, and the upper surface of the cover plate is flush with the road surface; and the self-detection module located in the accommodating chamber is installed at the bottom of the accommodating chamber, the self-detection module is electrically connected with the cathode protection unit through a cable, and the self-detection module is electrically connected with the test terminal.

This application discloses an anti-corrosion system for geothermal well pump pipes. Cathodic protection is achieved through strips. After the strips are arranged on the geothermal well pump pipes, an anti-corrosion coating is applied to the geothermal well pump pipes to prevent corrosion. After the geothermal well pump pipes are lowered into the wellhead, the air in the wellbore is first extracted through the nitrogen injection port, and then nitrogen is injected to protect the geothermal well pump pipes above the water surface at the wellhead from oxidation and corrosion. Based on the strips, the anti-corrosion coating, and the nitrogen injection port, the purpose of anti-corrosion of geothermal well pump pipes can be achieved.

A method is provided for examining the cathodic protection of a metallic and in particular ferromagnetic pipeline. An inspection device is also provided for examining the cathodic protection of a pipeline, in particular of a ferromagnetic pipeline. The inspection device is formed to be able to pass through the pipeline and in particular be driven by the medium, and includes a magnetizing device serving to create an alternating magnetic field. A magnet unit and a measuring device are provided, and includes at least one magnetic field sensor serving to measure a magnetic field formed on the inner side of the wall of the pipeline.

The invention discloses a preparation method of a buried steel pipeline Zn-Mg-Al-Mn sacrificial anode material for improving a smelting process in the technical field of metal corrosion protection, and the core of the method is that a brand new prepared nitrogen-sulfur co-doped carbon nanocage loaded nano zinc oxide and magnesium silicate heterojunction composite nanomaterial is used as a modifier; the preparation method comprises the following steps: preheating, mixing and wrapping with magnesium, aluminum and manganese metal raw materials, adding into molten zinc liquid, uniformly dispersing a modifier and alloy elements through multi-stage temperature control smelting, carrying out argon refining, standing, casting, and carrying out surface treatment and low-temperature stabilization heat treatment on a casting to finally prepare the high-performance sacrificial anode material. According to the preparation method, the multifunctional nano modifier is combined with a simplified smelting process, the alloy structure is remarkably refined, and the corrosion process is actively regulated and controlled, so that the sacrificial anode which is excellent in electrochemical performance, uniform in dissolution and long in service life is prepared, and the sacrificial anode is suitable for efficient and long-acting cathode protection of a buried steel pipeline.

This application relates to the field of pipeline protection technology, and in particular to a fault diagnosis method, device, and electronic equipment for an oil and gas pipeline cathodic protection system. The method includes: determining the weight ratio among the de-energization potential, protection potential, and current resistance IR drop of each test pile based on a preset hierarchical model of system health; calculating the health of each test pile based on its de-energization potential, protection potential, and IR drop, and the weight ratio among these factors; obtaining the health of the oil and gas pipeline cathodic protection system based on the health of each test pile; and obtaining the fault diagnosis result of the oil and gas pipeline cathodic protection system based on its health. This solves the problems in related technologies where pipeline cathodic protection systems lack objective, accurate, and universal health assessment methods, leading to inaccurate identification, high false alarm rates, and missed alarm rates during actual use.

The invention discloses an anti-corrosion protection device and method for the inner wall of a metal pipeline of an oil field station, and belongs to the technical field of oil and gas field corrosion and protection. The protection device comprises a metal pipe body communicated with the protected metal pipeline of the oil field station, a metal net cage is arranged in the metal pipe body, and a sacrificial anode layer is cast on the inner surface of the metal pipe body; the metal mesh cage is wrapped in the sacrificial anode layer, and the metal tube body is conductively connected with the metal mesh cage and the sacrificial anode layer respectively; the device is in conductive connection with the protected metal pipeline, the protected metal pipeline is protected through the sacrificial anode and cathode protection principle, the technical problems that the inner wall of the pipeline of the oil field station is unstable in anti-corrosion effect and high in anti-corrosion cost are effectively solved, and the device has the advantages of being stable in anti-corrosion effect, simple and compact in structure and low in operation and maintenance cost.

The utility model relates to a natural gas pipeline cathodic protection quick installation mechanism, including test pile body and concrete foundation, the bottom of test pile body is equipped with the mounting panel, is equipped with a plurality of through slots on the mounting panel, the mounting panel bottom is equipped with the locating block, and the mounting panel is butt joint on the concrete foundation, and the top of concrete foundation is equipped with the locating groove on the corresponding locating block, and the locating block is inserted in the locating groove, and the top of concrete foundation is rotatably provided with the pivot on the corresponding through slot, the fixed plate is fixedly connected to the pivot top, and the pivot and fixed plate are through the corresponding through slot and the fixed plate bottom surface is flush with the mounting panel top, after the pivot rotation 90 degrees, the fixed plate is perpendicular to the corresponding through slot and butt joint on the top of mounting panel, and the protective cover is slidably sleeved on the test pile body, and the protective cover is sleeved outside the mounting panel. The utility model can realize the quick dismounting of test pile body and the effective protection of fixed component, and is more practical.

The utility model discloses a device for automatically monitoring effectiveness of a cathode protection system of a metal pipeline, which comprises a computer processor assembly, a sensor assembly, an electric data bus, a medium and a protected structure, a computer processor component connected to one or more sensor components placed along an electrical data bus, the sensor components and the electrical data bus being buried or submerged in a medium; the sensor assemblies are placed at a first distance of a protected structure, and adjacent sensor assemblies are separated by a second distance; according to the utility model, a user can be helped to analyze and check the performance of the cathode protection system, and data can be summarized regularly or at any random period so as to ensure the normal operation of the current cathode protection system.

The embodiment of the invention provides an oil-gas self-spraying production device, a mounting method thereof and an oil-gas self-spraying production system, and relates to the technical field of oil-gas self-spraying production. The oil gas self-spraying production device comprises an oil pipe, an anti-corrosion layer, a plurality of first metal layers, a cathode protection assembly and a chemical adding assembly. The anti-corrosion layer is arranged on the inner wall of the oil pipe. The first metal layers are arranged on the outer wall of the oil pipe at intervals in the extending direction of the oil pipe, and the metal activity of the first metal layers is higher than that of the oil pipe. The cathode protection assembly is fixedly connected with one end of the oil pipe and comprises a second metal layer, and the metal activity of the second metal layer is larger than that of the oil pipe. And the dosing assembly is fixedly connected with the cathode protection assembly, is located on the side, away from the oil pipe, of the cathode protection assembly, and is used for releasing a corrosion inhibitor and / or a scale inhibitor. According to the oil gas self-spraying production device, the second metal layer can protect the outer wall of the oil pipe through the electrochemical protection principle, and the oil pipe is not prone to damage.

The application discloses a cathode protection state evaluation method and system based on secondary current distribution, and relates to the technical field of pipeline corrosion prevention. Based on a drawn position slope curve diagram, the similarity of position slope curves under multiple test potentials is determined, and an optimal constant potential instrument output is found as a protection potential in combination with test potentials which can protect the pipeline and do not overprotect the pipeline. Test slopes of the protection potential at multiple time points are acquired, a change trend of the test slope of a test pile with time is determined through deep learning, and thus a part of the pipeline corresponding to the damaged test pile is found.

A water heater includes a tank defining an interior for holding water, an anode extending into the interior, and cathodic protection circuitry electrically coupled with the anode. The cathodic protection circuitry is configured to repeatedly apply current and limit application of current to the anode. Application of current to the anode occurs during a first time and limiting application of current to the anode occurs during a second time. The control circuitry is configured to measure an electrical parameter representative of a charge of the tank during the second time and adjust a level of the current applied to the anode based on a value of the electrical parameter.

A system and method for providing cathodic protection in supercritical water oxidation (SCWO) processes, designed to prevent corrosion of metallic components under high-pressure and high-temperature conditions. The system includes a graphite anode and a noble metal reference electrode housed in ceramic-insulated assemblies, connected to process piping through tee-fittings. The method applies an impressed current to the anode while dynamically adjusting the voltage based on real-time measurements from the reference electrode. The system can include a dynamic offline test device for measuring current, voltage, and resistance of PFAS-contaminated aqueous streams to optimize cathodic protection.

This invention relates to a cathodic protection and external corrosion monitoring device for natural gas pipelines, comprising a monitoring probe, pipeline fasteners, a base plate, a top plate, and locking components. The pipeline fasteners are used to fix the device to the natural gas pipeline. The base plate is horizontally installed on the upper end of the pipeline fasteners, and the top plate is horizontally installed on the upper end of the monitoring probe. Parallel baffles are provided on both sides of the upper end of the base plate. The monitoring probe is placed on the upper end of the base plate, positioned between the baffles on both sides. The locking components are detachably connected to the baffles and the top plate, used to lock the baffles and the top plate in place. Advantages: The structure is simple and reasonable, allowing for quick disassembly of the monitoring probe and providing positioning during installation. This avoids the problem of users having to remove numerous bolts one by one when the monitoring probe needs to be replaced, improving the efficiency of probe replacement, saving time and effort, and increasing the accuracy of the monitoring probe's pipeline monitoring data.