300results about How to "Prevent oxidation and corrosion" patented technology

A feedthrough terminal assembly for an active implantable medical device utilizes an insert to establish a reliable electrical connection between capacitor electrode plates, via inner surface metallization of a capacitor aperture, and an associated terminal pin 10, which passes at least partially therethrough. The inserts are preferably resiliently flexible, such as a spring, to establish this connection. The insert also serves to establish a mechanical connection between the capacitor and the terminal pin.

A feedthrough terminal assembly for an active implantable medical device utilizes to establish a reliable electrical connection between capacitor electrode plates, via inner surface metallization of a capacitor aperture, and an associated terminal pin 10, which passes at least partially therethrough. The inserts are preferably resiliently flexible, such as a spring, to establish this connection. The insert also serves to establish a mechanical connection between the capacitor and the terminal pin.

In some embodiments, a printed circuit board (PCB) comprises a substrate comprising an insulating material. The PCB further comprises a plurality of conductive tracks attached to at least one surface of the substrate. The PCB further comprises a multi-layer coating deposited on the at least one surface of the substrate. The multi-layer coating (i) covers at least a portion of the plurality of conductive tracks and (ii) comprises at least one layer formed of a halo-hydrocarbon polymer. The PCB further comprises at least one electrical component connected by a solder joint to at least one conductive track, wherein the solder joint is soldered through the multi-layer coating such that the solder joint abuts the multi-layer coating.

The invention discloses a manufacturing process for plugging conductive holes of a circuit board with resin, which comprises the following steps: A) carrying out plated through hole and electroplating treatment on a circuit board substrate which is provided with conductive holes; B) carrying out windowing treatment on conductive holes of the circuit board substrate which is electroplated, and adhering a dry film to transfer the printed picture; C) electroplating the conductive holes of the circuit board which is provided with the dry film; D) filling resin into the conductive holes so as to plug the conductive holes, and baking the circuit board at low temperature after the conductive holes are plugged; E) removing the remained resin through polishing way; F) removing the film of the circuit board after being polished; and G) and baking the circuit board at high temperature after the film is removed. The process not only can solve the problem that the air bubbles are easy to produce by directly filling ink or other anti-corrosion materials, but also greatly reduces the polishing difficulty; and during the hole plugging process of the conductive holes of the circuit board, the circuit board is only required to be polished for one time, so not only the efficiency is improved, but also the cost is reduced.

The invention relates to a substrate having a metal post and a method of manufacturing the same, in which a round solder bump part formed on a metal post melts and flows down along a lateral surface of the metal post by being subjected twice to a reflow process, thus forming a solder bump film for preventing oxidation and corrosion of the metal post.

The invention relates to a coking wastewater advanced treatment system, comprising a microwave-assisted catalytic oxidation device, a mixing reaction pool, a sedimentation pool, a manganese sand filter, a precision filter and a frequent electrode reverse electrodialysis device, wherein the microwave-assisted catalytic oxidation device is used for carrying out catalytic oxidation treatment on coking wastewater subjected to A/O (Anoxic/Oxic) biochemical treatment; the mixing reaction pool is connected with the microwave-assisted catalytic oxidation device and the sedimentation pool; the manganese sand filter is connected with the sedimentation pool and the precision filter; and the frequent electrode reverse electrodialysis device is connected with the precision filter. The advanced treatment process provided by the invention can be used for coking wastewater advanced treatment and simultaneously has a high-efficiency pretreatment and economic and proper type desalting system.

An internal cavity structure of the push bar kiln used for preparing VN alloy is composed of internal cavity, cover plate, side wall and tracks. A push bar kiln is longitudinally and sequentially composed of the low-temp segment with 5 temp regions, the transition segment with 4 temp regions, the high-temp segment with 7 temp regions, and the cooling segment consisting of natural cooling region and forced cooling region. It features that different but proper refractories are chosen for different temp regions. Its internal cavity has 3 separated channels. The central channel is the kiln cavity and two side channels are isolated heating element ones.

The invention discloses a through silicon via (TSV) back surface exposure process. By retaining a substrate above a TSV during the grinding of the back surface of the substrate, the damage to an exposed part of the TSV and the substrate caused by a physical thinning process is avoided, and the ground surface of the substrate with high total thickness variation (TTV) has high surface smoothness, so that the consistency in the subsequent etching process is high. The substrate is etched by an etching solution with high selection ratio of the substrate to a medium layer through a first wet method, the situation of etching of the medium layer and a barrier layer on the TSV for the first time decides whether or not the substrate is etched for the second time and the third time, the exposed part of the TSV has an enough height, and a conductive column of the exposed part is protected from being damaged by the etching solution. A photosensitive material serves as a medium protection layer, and a final TSV exposure structure is etched in an exposure and development manner, so that the corrosion and oxidization of conductive column copper in the conventional process are avoided, and the subsequent processing steps are simplified.

The invention discloses a nanometer oxide coated phosphate rust resisting pigment which is a composite rust resisting pigment formed by coating a nanometer-scale oxide on micron-scale phosphate, wherein the weight ratio of the nanometer-scale oxide to the micron-scale phosphate is (1-10):100. The preparation of the nanometer oxide coated phosphate rust resisting pigment comprises the following steps of: A, preparing calcium phosphate through carrying out liquid phase reaction on a calcium-containing compound and phosphoric acid; B, adding a titanyl sulfate or zinc sulfate solution into a calcium phosphate solution, mixing evenly, then stirring and slowly dripping calcium hydroxide emulsion into the mixture to generate nanometer titanium dioxide or nanometer zinc oxide which is coated on the surface of the calcium phosphate; and C, filtering the reaction solution and drying and roasting a filter cake to obtain the nanometer oxide coated phosphate rust resisting pigment. The rust resisting pigment provided by the invention has the advantages of excellent metal rust resisting property and very low cost.

In an anticorrosion device of a hydraulic cylinder in which a seal groove partitioned with a plurality of compartments is formed at an inner side of a head cover, with a wiper seal, a rod seal and a buffer seal being disposed in the groove, and a portion between a tube and a rod of a hydraulic cylinder is sealed for thereby preventing the air from inputting from the space into the interior of a tube, there is provided an anticorrosion device of a hydraulic cylinder which comprises a seal member which is mounted on a groove near the space among the compartments and slides along an outer surface of the rod; and a packing ring which is elastically and closely contacted with an outer side of the seal member for sealing the groove.

The invention discloses a weather-proof, anti-corrosion and antibacterial processing process for rosewood fan frameworks, and belongs to the process field of folding fan bamboo material processing. The weather-proof, anti-corrosion and antibacterial processing process is characterized by including the steps of preparing antibacterial and anti-corrosion solvents and antibacterial and anti-corrosion boiled materials, and conducting material boiling, spraying and slurry wrapping. In addition, as surface active agents, purification dispersants and sodium carboxymethylcellulose are added to the antibacterial and anti-corrosion solvents for use, all anti-corrosion and antibacterial components can be integrated and coincident, and the antibacterial and anti-corrosion effect can be maximized and optimized under the synergistic effect. Pure natural materials are selected as the antibacterial and anti-corrosion solvents and the antibacterial and the anti-corrosion boiled materials, the purchase cost is economical and affordable, the weather-proof, anti-corrosion and antibacterial effects are good, no hazard is caused to the environment and human bodies, successes are made at the experimental stage and during batched small experiments, and the weather-proof, anti-corrosion and antibacterial processing process is suitable for industry popularization.

The invention discloses a heating and ventilating construction pipeline connecting structure. The heating and ventilating construction pipeline connecting structure comprises a first connecting ring and a second connecting ring which are fixedly installed on a main pipeline, the first connecting ring is provided with a first installation groove, a second installation groove and a sliding groove, aclamping mechanism is arranged between the side wall of the second connecting ring and the first installation groove, a blocking mechanism is arranged between the second installation groove and the sliding groove, the blocking mechanism extends into the clamping mechanism and abuts against the inner side wall of the clamping mechanism, a sealing cavity is formed in the second connecting ring, anda sealing mechanism is arranged between the sealing cavity in the second connecting ring and the side wall of the second connecting ring. The heating and ventilating construction pipeline connectingstructure has reasonable structural design, can stably seal the inner space of a pipeline, prevents the joint of a connecting pipeline inside the pipeline from being oxidized and corroded by outside humid air, can timely discharge the leaked water when the connecting pipeline leaks water, and ensures the dryness inside the pipeline.

The invention discloses a constant temperature fireproof power distribution cabinet and belongs to the technical field of a power distribution cabinet. The constant temperature fireproof power distribution cabinet includes a cabinet body, a rotating mechanism, a heat radiation mechanism, a monitoring control mechanism and a wire harness mechanism, wherein a front side wall of the cabinet body is provided with a door plate matched with the cabinet body, the door plate is provided with a lock capable of being locked with the cabinet body, the door plate is provided with a protection assembly, the rotating mechanism is arranged at the top of the cabinet body, two side walls of the cabinet body are provided with multiple vent holes, the monitoring control cabinet is arranged at an upper portion in the cabinet body, the wire harness mechanism is vertically movably mounted in the cabinet body, a bottom wall and a side wall of the cabinet body are provided with a moving assembly and a handleassembly respectively, a top portion in the cabinet body is provided with an illumination lamp, and the rotating mechanism, the heat radiation mechanism and the illumination lamp are electrically connected with the monitoring control mechanism. The constant temperature fireproof power distribution cabinet is advantaged in that the structure is simple, rapid heat radiation operation of the whole cabinet can be realized, efficiency is relatively high, functions are various, and practicality is relatively strong.

The invention relates to the technical field of building structural members, and particularly relates to an FRP steel concrete column and steel beam combined joint and a mounting method. The FRP steel concrete column and steel beam combined joint comprises an FRP double-I-shaped steel concrete column, a beam column connecting piece and an H-shaped steel beam, wherein the FRP double-I-shaped steel concrete column comprises an upper FRP double-I-shaped steel concrete column and a lower FRP double-I-shaped steel concrete column which are connected through a connecting cylinder. The FRP steel concrete column and steel beam combined joint is good in corrosion resistance and is assembled through bolt connection after being transported to the site, and the structural integrity and the bearing capacity of the column are improved.

The invention discloses an active heat regenerator for a room temperature magnetic refrigerator. The active heat regenerator comprises an insulated housing and a magnetocaloric working medium bed layer arranged inside the insulated housing, wherein the magnetocaloric working medium bed layer is internally provided with mutually parallel micro channels for a heat exchange fluid flowing through linearly and uniformly along the length direction; the heat exchange fluid is a low boiling point fluid, such as R410a, R134a, R407a or R290, that the boiling temperature after pressurization is 20-30 DEG C. The active heat regenerator has the effects and advantages that the heat exchange efficiency of the active heat regenerator is furthest improved, the boiling heat-transfer characteristic is effectively utilized, and the heat convection coefficient between the heat exchange fluid and a magnetocaloric working medium is greatly improved, thus the cold/heat flow time is reduced, and the running efficiency of the room temperature magnetic refrigerator is improved. Moreover, an organic low boiling point working medium is introduced, so that the problem that active rear metals corrode during the machine running process is effectively solved. Therefore the room temperature magnetic refrigerator keeps a smooth and efficient running state during a long-time running process.

The invention discloses a protection method for joint stop of an air cooling island and a unit. The method comprises the following steps of: 1) adjusting parameters before the air cooling unit is stopped; 2) injecting maintenance solution; 3) stopping the unit; and 4) draining. The method has the advantages that: octadecylamine is vaporized at the temperature of more than 450 DEG C, the gaseous octadecylamine enters a unit thermodynamic system and an air cooling system along with steam together to form a layer of hydrophobic protective film on the metal surface, and air is isolated from the metal after the unit is stopped, so that air is prevented from oxidizing and corroding the metal surface in relatively damp environment, a great amount of water is not required to be used for rinsing asystem in the process of restarting the unit, the qualification time of iron content in circulating water during starting is effectively shortened, and the using amount of fuel oil or fuel coal is saved during starting.