88results about How to "Speed up corrosion" patented technology

The invention provides a preparation method for graphene oxide modified polymer cement-based anti-corrosive paint. The preparation method comprises the following steps: performing carboxylation of a graphene oxide; synthesizing graphene oxide modified polyacrylate emulsion; and preparing the graphene oxide modified polymer cement-based anti-corrosive paint. The paint prepared by the preparation method has the advantages of high toughness, high bonding strength and high compactness and the like of an organic polymer, and has high mechanical strength and high weather resistance and durability ofa special cement-based material. The graphene oxide is used for modifying the polymer cement-based anti-corrosive paint, a mechanical property of a polymer film is further optimized, interface compatibility and a bonding force of a polymer organic component and a cement-based inorganic component are improved, thereby a paint microscopic structure is optimized, and anti-corrosion performance and stability are improved.

The invention discloses a medical degradable Fe-Mg-X alloy material and a preparation method thereof. The alloy material comprises the following components by weight percentage: Mg (greater than or equal to 2% and less than or equal to 10%), X (greater than 0% and less than 2%), and the balance of Fe. The invention further relates to the preparation method of the alloy material. As the alloy element Mg having a larger electrode potential difference from the matrix Fe is added, the kinetics of electrochemical corrosion of an Fe-Mg alloy matrix is improved significantly; the corrosion degradation rate of the Fe-Mg alloy matrix in an organism environment is increased greatly; and the component X having biological effects of promoting bone tissue repair, diminishing inflammation, sterilizing and the like is further added. The medical degradable Fe-Mg-X alloy material is a multielement degradable iron-base alloy material consisting of the complete-biosafety human nutrient elements Fe, Mg and X, has good biocompatibility, higher mechanical property and appropriate corrosion rate, has an important application potential in the field of medical degradable implantation materials, and has a better application prospect.

The invention discloses a testing box for an accelerated environment, which comprises a box body (1) and a cover plate (2) hinged on the box body; and the box body (1) is internally provided with a movable spraying system. In the invention, the spraying is not affected any more by wind and rain in the external environment, the problems of non-uniform spraying, under-spraying and over-spraying andinfluence on ambient environment are solved, and the detection data is more uniform and reliable.

The invention discloses an electric chemical method for accelerated corrosion on a stainless steel welding seam region. The method comprises the following experiment steps of work electrode preparation, stable corrosion potential test and electrochemical accelerated corrosion. The method provided by the invention solves the problems that the existing electrochemical accelerated corrosion cannot beused for accelerated corrosion on stainless steel to obtain the practical corrosion morphology. The test method can be used for performing electrochemical accelerated corrosion on the stainless steelregion; the corrosion speed of the stainless steel is accelerated; the corrosion resistance performance weakness relationship of different regions of the welding seam in the corrosion media can be judged; the correct judgment is made on the corrosion behavior of a welding joint used in engineering in the use environment.

The invention discloses an etching machine, wherein an etching groove, a flushing tank and a driving device are arranged in a chassis; a basket is connected to the driving device, a first rotary shaft and a second rotary shaft are arranged on the basket, and the driving device drives the basket to rotate around the first rotary shaft and drives the first rotary shaft to rotate around the second rotary shaft. The etching machine disclosed by the invention improves the corrosive uniformity and corrosive speed as well as the uniformity of backwashing and the flushing speed.

The invention relates to the technical field of biological materials, in particular to a surface modification method of medical magnesium alloy. The surface modification method of the medical magnesium alloy aims at resolving the problems that the bonding force between a magnesium alloy base body and a coating is small, the magnesium alloy base body is prone to falling off, and the decomposition speed is too high in the later implantation period of the magnesium alloy. The surface modification method includes the steps that firstly, medical magnesium alloy materials are ground through abrasive paper, cleaned and then aired; secondly, cleaned medical magnesium alloy materials are put into a high-current pulse electron beam device to be radiated; thirdly, calcium and phosphorus electrolyte is prepared, and a hydroxyapatite coating is prepared on the surface of the medical magnesium alloy materials in a pulse electrodeposition mode. The surface modification method of the medical magnesium alloy improves the biological activity of the surface of the magnesium alloy, improves the corrosion resistance in the later implantation period of the magnesium alloy, obviously improves the bonding force between the hydroxyapatite and the base body, and overcomes the problems that the service life of a medical magnesium alloy implant is short, and the hydroxyapatite coating is prone to falling off.

The invention belongs to the technical field of additive manufacturing, and particularly discloses a channel powder removal method for a high-energy-beam 3D printing cooling board and a product. The method includes the following steps of firstly, removing part of residual powder in channels of the high-energy-beam 3D printing cooling board, and coating the outer surface of the cooling board with anti-corrosion paint; secondly, washing the cooling board through an ultrasonic washing/chemical milling combined process so as to thoroughly remove the rest of powder in the channels, and meanwhile performing polishing treatment on the surfaces of the channels; and thirdly, removing residual chemical corrosive liquid in the channels of the cooling board and the anti-corrosion paint coated on the outer surface of the cooling board, and performing drying to obtain the required cooling board. By means of the method, residual non-molten powder in the channels of the cooling board can be efficiently and thoroughly removed, meanwhile the quality of the inner surfaces of the channels is improved, and the problems that removing is not thorough and the inner surfaces of the channels still need to be subjected to after-treatment by means of an existing powder removing technology are solved.

The invention discloses an additive for alkali polishing of a silicon wafer. The additive comprises the following components in parts by mass: 0.5-2 parts of gelatin, 1-2 parts of acrylamide, 0.5-2 parts of quaternary ammonium salt, 1-3 parts of sodium p-aminosalicylate, 4-5 parts of ammonium thiocyanate, 3-4 parts of alkyl glycoside, 0.1-0.3 part of sodium benzoate and 81.7-89.9 parts of water. When the additive is added into a polishing solution for alkali polishing of the silicon wafer, the reaction rate of a [111]/[100] surface can be changed, the reaction rate of a [100] surface can be inhibited, the flatness of the back surface of the silicon wafer can be changed, a relatively rough small-size tower footing structure can be formed on the back surface of the silicon wafer after alkali polishing, and the reflectivity of the back surface of the silicon wafer can be reduced to a small extent, so that back slurry contact is facilitated; and the slurry tension is improved, the FF can be improved, and the electrical performance of a battery piece is improved.

The invention relates to the field of foundation treatment, in particular to a spiral self-drilling steel pile capable of being reinforced through diameter increasing, and a construction method of thespiral self-drilling steel pile. The spiral self-drilling steel pile capable of being reinforced through diameter increasing comprises a spiral pile with a center shaft being provided with spiral blades, and further comprises a lengthening rod composed of one or more lengthening sections; the upper end of the spiral pile is connected with the lower end of the lengthening rod, wherein diameter-increasing guiding discs are arranged on the one or more lengthening sections in the lengthening rod; and the diameter-increasing guiding discs are each in a funnel shape, openings of the diameter-increasing guiding discs face upwards, and the bottoms of the diameter-increasing guiding discs are connected with the rod wall of the lengthening rod in a sealed mode. Through pile side grouting, slurry reaches the diameter-increasing guiding discs to form a reinforced body, the vertical limit bearing capacity, critical buckling load and transverse carrying capacity of the pile are improved, and compared with the mode for improving the bearing capacity through methods of increasing the number of the blades, the diameter of the blades and the pile length, the more economical and applicable effects are achieved so as to enable a foundation to be more stable.

The copper base material for contactor features its components including tungsten carbide 0-10 wt%, Y and/or Zr 0.1-1 wt% and La 0.01-2 wt% except Cu. The material has high anticorrosive and antioxidant performance, low resistivity, no pollution, low production cost and excellent performance.

The invention discloses a lead-calcium alloy for a positive grid, and a preparation method thereof. The lead-calcium alloy is prepared from the following components: calcium, aluminum, tin, bismuth, rare earth, modified graphene and the balance lead. The lead-calcium alloy for the positive grid is high in corrosion resistance and tensile strength, and the service life of a storage battery can be effectively prolonged; according to the lead-calcium alloy, the content of the calcium in the lead-calcium alloy is controlled to be 0.09%-0.096%, and the anti-corrosion effect can be remarkably improved; when the content of the calcium is 0.094%, the anti-corrosion effect is optimal; when the content of the calcium is higher than 0.096%, in the using process, the growth speed in the length-width direction is increased, the corrosion speed of the alloy is increased, and accordingly the service life of a battery is shortened; when the content of the calcium is lower than 0.09%, the internal crystal structure of the alloy is thickened, and the intercrystalline corrosion speed is increased; and the positive grid can be rotted and broken more quickly in the use process, and consequently the service life of the battery is shortened.

The invention relates to dye wastewater disposal, in particular to a method for preparing a catalyst for disposing the combined modification of dye wastewater. The method specifically comprises the following steps: 80 to 200 ml of hydrazine hydrate is added into 150 to 400 ml of a copper sulfate pentahydrate solution in a stirring state, is aged for 15 to 35 minutes, is subsequently added with 15 to 30 grams of industrial iron powder, is stirred for 2 to 5 minutes and is filtered to obtain sediment; and the sediment is washed through distilled water and is dried to obtain the catalyst. The method effectively combines two methods of internal electrolysis and photocatalysis together to prepare the high-efficient, economic and innoxious catalyst and has the advantages of stable performance, high efficiency, wide applicability, no pollution, friendliness to environment, thereby strengthening the dye wastewater disposal. The catalyst has a simple preparation process, mild reaction condition, and cheapness and wide source of raw materials.

The invention discloses a dormancy breaking device for improving the germplasm germination rate of Artemisia wellbyi, which comprises a base, a stirring barrel, a first motor, a first electric valve, a seed discharging mechanism and a second motor, first rolling wheels are fixed to the lower end face of the base, the stirring barrel is fixed to the tops of supporting plates, the first electric valve penetrates through the top of the stirring barrel and is connected with an annular pipeline, the seed discharging mechanism is fixed to the bottom of the stirring barrel, a collecting box is arranged on the lower side of the seed discharging mechanism, a cleaning channel is fixed to one side of the collecting box, and a draining plate is embedded in the bottom of the cleaning channel. According to the dormancy breaking device for improving the germplasm germination rate of the Artemisia wellbyi, Artemisia wellbyi seeds make contact with sheep gastric juice, the sheep gastric juice corrodes epidermis of the Artemisia wellbyi seeds, then under the action of a stirring rod, the corrosion speed of the epidermis of the Artemisia wellbyi seeds can be increased, and compared with the mode of mechanically abrading the epidermis and the dormancy breaking agent, the mode cannot damage the interiors of the Artemisia wellbyi seeds.

The invention discloses an anti-corrosion resistance reduction agent for a copper ground grid. The anti-corrosion resistance reduction agent for the copper ground grid is characterized by being made from, by weight, 2-6 parts of sodium bicarbonate, 0-2 parts of sodium carbonate and 80-120 parts of water. The anti-corrosion resistance reduction agent avoids loss of water in soil to enable soil resistivity to be relatively stable, and resistance reduction is realized while chemical corrosion and electrocorrosion of copper pipes and steels are avoided.

The invention provides a surface treatment method for improving biological activity of medical degradable zinc alloy. The surface treatment method comprises the following steps of surface pretreatment, chemical polishing and compound activating treatment, after treatment, the biological activity of the zinc alloy can be remarkably improved, which mainly reflects that the surface hydrophily of thematerial is remarkably improved, and the surface can be subjected to uniform compact Ca-P layer biogenic deposit. Pure zinc which is not subjected to any treatment is put in simulated body fluid (SBF), and the surface of the pure zinc is hard to be subjected to Ca-P layer deposit; and the electric current density of zinc alloy subjected to treatment is reduced, and the coating impedance module value is decreased. The surface treatment effect is remarkable, the method is simple, operability is high, the equipment requirement is not high, the cost is low, and the method is suitable for mass production.

The invention discloses a tire mold. The tire mold structurally comprises a lower mold, an upper mold, air holes and guide blocks, wherein the outer wall of the lower mold is movably clamped to the inner wall of the upper mold, the air holes run through the outer wall of the upper mold, and the guide blocks are welded to the inner wall of the upper mold. When a tire is vulcanized in a high-temperature environment, an included angle eliminating device is driven to collect burnt particles at included angles between pattern blocks to prevent the situations that the burnt particles accumulate at the included angles between patterns for a long time and corrode the surface of the mold, accordingly the surface is uneven, normal use of the mold is affected, a required shape cannot be achieved in the vulcanization process, and the service life of the mold is shortened. When rollers rotate, brush blocks on the surfaces of the rollers collect the particles scraped by a scraper to prevent the situations that the particles are left on the bottom surfaces of the pattern blocks, slowly accumulate and make the rollers stuck, normal moving of an eliminating ring on the bottom surfaces between the pattern blocks is affected, the particles cannot be collected in time and the corrosion speed of the bottom surfaces is increased.

The invention discloses a carbon and silicon separation technology of nascent polysilicon and a use device of the technology. A difference of reaction rates outside and inside a solution is achieved by a rotation method so as to separate the nascent polysilicon from a graphite fixture; a rotation separation structure comprising an electrochemical reaction tank, a mechanical rotation device, an ultrasonic vibration device, a corrosive liquid cleaning device and a power supply is designed in order to better achieve the technology. The technology achieves the difference of the reaction rates inside and outside the solution by rotating a carbon head material; the carbon head material of the polysilicon is separated; the corrosion of the polysilicon outside the solution is reduced at the same time; and the weight reduction of the polysilicon is decreased.

The invention discloses a laser electrochemical combined machining device with dual flow channels. The device comprises an optical lens, the inner annular flow channel, the outer annular flow channel,a through hole of the inner annular flow channel, a through hole of the outer annular flow channel, an annular electrode, an inner ring opening and an outer ring opening. The optical lens is locatedon the inner side of the inner annular flow channel, the inner annular flow channel is located on the inner side of the outer annular flow channel, the through hole of the inner annular flow channel is communicated with the inner annular flow channel, the through hole of the outer annular flow channel is communicated with the outer annular flow channel, the inner ring opening is communicated withthe inner annular flow channel, and the outer ring opening is communicated with the outer annular flow channel. The inner annular flow channel and the outer annular flow channel are used for conveyingchemical liquid for corroding slag and fragments stacked in the laser machining process; the annular electrode is located between the inner ring opening and the outer ring opening, and the potentialdifference exists between the annular electrode and a device to be machined. By adopting the unique design of the dual annular flow channels and the annular electrode, the application range of the chemical liquid is controlled, and the defects that a volcanic vent exists in the existing laser machining process, and the chemical corrosion precision is not good enough are eliminated.