31results about How to "Reduce chemical corrosion" patented technology

The invention relates to a barium titanate chemico-mechanical polishing aqueous composition and its application. Specifically, the barium titanate chemico-mechanical polishing aqueous composition comprises: 1-20 wt%, preferably 8-15 wt% of an abrasive; 0.5-10 wt%, preferably 1-3 wt% of a complexing agent; and 0.01-5 wt%, preferably 0.1-1 wt% of a surface adsorbent, wherein the barium titanate chemico-mechanical polishing aqueous composition has a pH value of 8.0-12.0, preferably 10.0-11.5. The barium titanate chemico-mechanical polishing aqueous composition provided in the invention can be effectively applied to a barium titanate substrate chemico-mechanical polishing process, thereby being able to effectively obtain a polished barium titanate layer with a high polishing rate and high surface quality.

The invention provides a polishing solution applied to the magnesium alloy. The polishing solution comprises an abrasive, a strong oxidant, a pH regulator and deionized water; the components are as follows by weight percentage: 10 percent to 40 percent of the abrasive I, 0.1 percent to 3 percent of the strong oxidant, 1 percent to 10 percent of the pH regulator and the balance is deionized water. The polishing solution can be used for polishing treatment of magnesium-alloy surface, effectively improve surface finish of the magnesium alloy, effectively reduce surface scratch after polishing, and reduce surface roughness after polishing; simultaneously, polishing debris is dissolved in the polishing solution, the magnesium-alloy surface is easy to be cleaned, the polishing speed is rapid, the polishing solution has no harm to equipment, and the usage security is high.

The invention relates to a high lead-antimony slag type which is used for smelting technique of anode mud and is used by the anode mud in the process of reduction smelting of an oxygen bottom blowing bullion lead furnace in the technique that an oxygen bottom blowing furnace smelts the anode mud and a using method, belonging to the scope of separation and extraction of precious metal and base metal; a formula thereof is the high lead-antimony slag type with low silicon, low calcium and low sodium; all the materials comprises the following ingredients according to mass ratio: 5 to 22 percent of SiO2, 1 to 8 percent of FeO, 0 to 6 percent of Na2O, 0 to 5 percent of CaO, 10 to 35 percent of PbO and 150 to 45 percent of Sb2O3, wherein, the control range of the mass ratio of the PbO and SiO2 is 1.50 to 6.0. The formula not only has good effect for prolonging the service life of a refractory material and improving the continuous operation rate and processing capacity of the bullion lead, but also leads the reduction and volatilization of arsenic and antimony and oxidation and slag formation of lead to be realized simultaneously, reduces the usage of flux and consumption of fuel and effectively separates the valuable metals.

The invention discloses an electrochemical gold dissolving device and method. An ion exchange membrane electrolytic process is taken as a core technology, the electrochemical gold dissolving method adopting double membranes and double cathode rooms is adopted, a ruthenium iridium titanium-coated basket is taken as an anode, a ruthenium iridium titanium-coated net is taken as a cathode, hydrochloric acid is taken as electrolyte and aqua regia is not used, so that a nitrate removing process is cancelled, process flow is greatly simplified, chemical corrosion on equipment is reduced and environmental pollution is lowered. Besides, an ion exchange membrane is adopted, so that gold dissolved out on the anode can be prevented from entering the cathode region and separating out again on the cathode, and thus, the production efficiency is improved, the energy conservation and emission reduction of production are realized, and great economic benefits and social benefits can be produced.

The invention provides an ultrasonic-assisted induction preheating laser soldering method and device for preparing an abrasive particle grinding wheel. The method comprises the following steps that (1) the to-be-welded grinding wheel coated with an active binding agent and abrasive particles is fixed to a rotary shaft, and the distance between an induction coil and the surface of the to-be-welded grinding wheel is controlled to be within an effective heating distance; laser beam light spots of a laser heating system are adjusted to be focused on the peripheral surface of the to-be-welded grinding wheel and to be located behind the induction coil in the rotation direction of the rotary shaft; and a rolling wheel at the tail end of an ultrasonic amplitude variation rod fixed in an ultrasonic wave loading system is tightly pressed on the side face, of the grinding wheel, in the acting area of the laser beam light spots; and (2) the rotary shaft is made to drive the to-be-welded grinding wheel to rotate, coupling heating is conducted on the surface of the to-be-welded grinding wheel through the induction coil and the laser beam light spots; and chemical bonding and wetting climbing effects of the interface of the active binding agent and the abrasive particles are facilitated through the ultrasonic effect, the abrasive particles leaving a coupling heating area are subjected to high-frequency vibration, and thus thermal stress of the abrasive particles is released effectively.

The invention provides a method for improving oxidation resistance through normal-temperature blackening of rare earth permanent magnet powder. The method comprises the following steps: the rare earthpermanent magnet powder is dipped in normal-temperature blackening water treatment liquid, prepared by stated steps and containing divalent copper ions, a complexing agent and an oxidizing agent, forreplacement-oxidation reaction under normal temperature; different reaction times are controlled; and after the reaction is finished, magnetic powder is magnetically separated from reaction liquid bya permanent magnet for such steps as solid-liquid separation, distilled water washing, anhydrous ethanol extraction and 50-DEG C low-temperature drying to obtain the magnetic powder coated with a thin and compact oxide film on the surface. The method has the characteristics of simple process operation, low energy consumption, high film forming efficiency, environmental protection and the like; and the treated rare earth permanent magnet powder is more excellent in high-temperature oxidation resistance.

The invention relates to a magnesium alloy anode oxidation method sequentially comprising degreasing, pickling, alkali corrosion, anodic oxidation and drying steps, and a pulse power supply used in the anodic oxidation step outputs AC square wave pulses. An anodic oxidation film generated in the anodic oxidation process is not burnt and the surface of the oxidation film is smooth.

This invention discloses a high-efficiency waterborne edge-rounding solution for processing semiconductor wafer. The edge-rounding solution comprises: penetrant 0.1-10.0 wt.%, lubricant 10-40 wt.%, surfactant 0.1-1.0 wt.%, and deionized water as balance. The penetrant and surfactant are metal ion free, and thus can avoid chemical corrosion caused by metal ions. The edge-rounding solution has such advantages as high lubricity, high heat discharge performance, simple preparation, easy operation and low chemical corrosion, and can prolong the service life of cutters. The edge-rounding solution can solve the problems of impurity contamination, deep damage layer, high stress, and reduced service life faced by microelectronic process.

The invention discloses a waterborne fluorinated graphene coating and a preparation method and application thereof. The waterborne fluorinated graphene coating comprises a component A and a componentB, wherein the component A is composed of the following components: a waterborne epoxy resin emulsion, a fluorine-modified acrylic emulsion, waterborne aluminum-silver paste, fluorinated graphene, graphene, a leveling agent, a plasticizer, a photo-catalyst, an alignment agent, a defoaming agent, a toughener, a dispersant, and water; the component B is a waterborne epoxy curing agent; and a mass ratio of the component A to the component B is (3-6):1. The invention also discloses the preparation method of the waterborne fluorinated graphene coating, and the application of the waterborne fluorinated graphene coating in the surface treatment of highway guardrails. The waterborne fluorinated graphene coating has good weather resistance and physical properties, at the same time has the antifouling and self-cleaning ability, and has excellent anticorrosive and rustproof performance, and thereby the coating is suitable for the surface treatment of highway guardrails.

The invention relates to a method for preparing PdCl2. A diaphragm electrolytic cell is adopted for electrolysis, an anionic membrane is used for dividing the electrolytic cell into a dual-chamber electrolytic cell, a palladium strip is adopted as an anode, an inert electrode is adopted as a cathode, a hydrochloric acid solution of 1 mol/L to 6 mol/L is adopted as anode liquor, a sodium chloride solution of 0.1 mol/L is adopted as cathode liquor, electrolysis is carried out for 30 min to 60 min, the anode liquor obtained after electrolysis is concentrated and crystallized, and PdCl2 is obtained. The method has the beneficial effects that an ion exchange membrane electrolysis method is adopted as the core technology, an electrochemical method is adopted, the palladium strip is adopted as the anode, the inert electrode is adopted as the cathode, the hydrochloric acid solution and the sodium chloride solution are adopted as electrolysis liquor, no aqua regia is utilized, the process of removing nitre is omitted, the technological process is greatly simplified, equipment chemical corrosion is reduced, and environment pollution is reduced; and an ion exchange membrane is adopted, the situation that palladium dissolved out of the anode enters a cathode area and is separated out of the cathode again can be avoided, production efficiency is improved, energy saving and emission reduction of production are achieved, and great economic benefits and social benefits can be generated.

The invention discloses a preparation method of antimony pentafluoride. The method comprises the following steps: 1) crushing a metallic antimony block, and adding to a reactor; 2) vacuumizing the reactor to form negative pressure, and heating to 120 DEG C to remove moisture in the reactor and a material; 3) introducing nitrogen to the reactor, so as to pressurize to constant pressure; 4) slowly introducing fluorine, reacting to generate antimony pentafluoride vapor, beginning to warm in the reaction, and emptying for a plurality of times until the pressure of a buffer tank does not ascend again; 5) preparing an antimony pentafluoride product from the antimony pentafluoride vapor in a condensation reflux mode. The invention simultaneously discloses the reactor for preparing antimony pentafluoride. In the reactor, metallic antimony directly reacts with fluorine, so as to generate antimony pentafluoride, so that the product quality is improved and the process is simplified, and the reactor is convenient to operate. Condensation reflux liquid takes away a part of reaction heat, so as to well control the internal temperature of the reactor; meanwhile, continuous reaction is also ensured; chemical corrosion inside the reactor is reduced. Thus, the service life of the reactor is prolonged.

The invention belongs to the field of corrosion prevention of metal in saline solutions, and particularly relates to a preparation method and application of a stable super-hydrophobic conductive polysiloxane-polyaniline (PANIC-RA-POS) anticorrosive coating. According to the method, a compact and stable conductive polyaniline film is constructed on a metal surface through an electrochemical method, an external hydrophobic polysiloxane coating is constructed through a spraying method, meanwhile, an adhesive sticker (RA) is sprayed between polyaniline and polysiloxane to form a polysiloxane-polyaniline (PANIC-RA-POS) anti-corrosion coating, which is applied to the field of metal surface corrosion prevention. The coating is divided into an internal conductive polyaniline film PANIC and an external super-hydrophobic coating POS, the PANIC has the unique advantages of spontaneously passivating the metal surface and slowing down pitting corrosion, electrochemical corrosion is effectively reduced, the POS has the characteristic of spontaneously forming an air layer in a corrosive medium, transmission of a corrosive medium and electrons can be efficiently blocked, chemical corrosion is effectively reduced, the adhesive sticker glue spray SA enhances the binding force between the PANIC and the POS, and the metal corrosion resistance is effectively improved.

The invention relates to a protection device and method for a controllable-pitch propeller blade root bolt. An annular space formed between the head of a blade root bolt and a mounting hole of a bladeflange is filled with a blade root bolt protective agent for guaranteeing the external line type of a blade, external foreign matters can be prevented from entering the annular space area, and a protective layer is formed outside the blade root bolt. The annular space formed by the blade root bolt and the blade flange mounting hole is filled with the blade root bolt protective agent, the externalline type of the blade is guaranteed, external foreign matters are prevented from entering the area, and the protective layer is formed outside the blade root bolt. The protective layer has good insulativity and corrosion resistance, and can effectively reduce the risks of chemical corrosion, electrochemical corrosion and hydrogen embrittlement fracture of the blade root bolt to a certain extent.And meanwhile, while isolating a circular truncated cone at the head of the blade root bolt from seawater, the protection device can be dismounted in a manual knocking mode, and repeated disassemblyand assembly of the blade root bolt are facilitated.

The invention relates to the field of paper-making auxiliaries, in particular to a preparation method of a polymeric material for neutral paper-making. The preparation method of the polymeric materialfor neutral paper-making is characterized in that alkyl ketene dimer is prepared, modified polyether glycol is prepared, and the modified polyether glycol is uniformly melted with diphenylmethane diisocyanate, and then an acetone solution of a catalyst is dropwise added, a chain extender is added after reaction is carried out, and then purified water is added and is stirred at high speed to prepare aqueous polyurethane neutral sizing agent emulsions. By adopting the neutral sizing agent, chemical corrosion of mechanical equipment can be greatly reduced, paper breaking phenomenon is reduced, the downtime of a paper machine is shortened, the dryness of paper sheets is improved, the papermaking speed is accelerated, and thus, the production ability of the paper sheets can be improved.

The present invention discloses a mounting structure for an electrical contact terminal, and more particularly discloses a technique that enables reliable mounting of an electrical contact terminal atan electrical contact portion provided to a metal casing. An accommodation groove is integrally formed in the electrical contact portion of the surface of the metal casing, and the electrical contactterminal is forcibly inserted into the accommodation groove to be physically coupled to the accommodation groove, and gap portions between a main body and the casing are fused and joined to each other by welding at the entrance of the accommodating groove, so that the gap portions between the main body and the casing is mechanically coupled and electrically coupled.

The invention relates to a double-gate-disc casting for petroleum machinery. The double-gate-disc casting for petroleum machinery is prepared from the following chemical components in percentage by mass: less than or equal to 0.08 percent of C, 0.06 to 0.10 percent of Si, 0.05 to 0.2 percent of Zn, 1 to 5 percent of Ti, 0.05 to 0.10 percent of Al, 0.25 to 0.30 percent of Mn, less than or equal to0.025 percent of P, less than or equal to 0.15 percent of Mg, and the balance Fe and inevitable impurities. The possibility of producing a local primary battery during the use process of the double-gate-disc casting can be reduced, so that the electrochemical corrosion is reduced; and in addition, the chemical corrosion of sulfur elements in petroleum on the double-gate-disc casting can be reduced, and the double-gate-disc casting is ensured to have higher strength and toughness, so that the service life of the double-gate-disc casting is effectively prolonged.

The invention provides an energy-saving and emission-reducing machine for a water-cooling water chilling unit of an air conditioner, which comprises a condenser, a cooling water inlet pipe, a condenser water outlet pipe, an automatic condenser pipeline cleaning device, a sand cylinder filtering, backflushing and blowdown device connected and communicated with the automatic condenser pipeline cleaning device, and an ultraviolet sterilization cavity device communicated with the condenser water outlet pipe, the electromagnetic wave soft water descaling device is arranged on the cooling water inlet pipe; and the electromagnetic wave soft water descaling device is respectively connected with the sand cylinder filtering back-flushing blowdown device and the ultraviolet sterilization cavity device. Compared with the prior art, power consumption and water consumption are reduced, and meanwhile, the dual effects of no pollution, no corrosion, no emission, energy conservation and environmental protection in air conditioner water treatment are achieved; chemical pollution, chemical emission and chemical corrosion are reduced, energy conservation and emission reduction of a central air-conditioning system are completely achieved, and the service life of equipment, pipelines and valves of an air-conditioning water-cooling unit system can be prolonged; the installation site and space are saved, and the system can be suitable for more water-cooling air conditioner machine room environments.

The invention discloses a flue gas treatment device based on low temperature gas separation. The process includes a spray cooling tower for pre-cooling the flue gas and washing the solid particles in the flue gas. The flue gas treated by the cooling tower then enters the partial condenser, and the different gas components in the flue gas are decomposed according to the gas condensation temperature. For phase change separation, the cooling capacity required by the partial condenser comes from the Brayton refrigeration cycle with nitrogen as the working medium. The device separates different gas components in the flue gas by low-temperature condensation, and is characterized by: no chemical reaction in the flue gas separation process, and little corrosion to the equipment; the separated gas can be recycled as a resource, which can generate economic benefits while meeting environmental protection requirements. ; Overcome the problems of high energy consumption, low value of by-products, easy corrosion of equipment and low-altitude white smoke emission of traditional wet desulfurization and selective catalytic reduction (SCR) denitration processes.