96results about How to "Improve anti-oxidation effect" patented technology

The invention discloses a gypsum mold formula for casting a magnesium alloy and a preparation method thereof, relating to preparation of a gypsum mold for casting a magnesium alloy. The gypsum mold formula comprises an additive component consisting of four basic components, including alpha-semihydrated gypsum, quartz powder, bauxite and magnesium sulfate as well as seven substances such as trisodium orthophosphate, barium chloride, a water reducing agent and the like. The invention further discloses a preparation method for the gypsum mold formula. Due to the adoption of scale graphite, oxidation of the magnesium alloy is effectively prevented; the water reducing agent is added into the formula, so that the fluidity of gypsum slurry is improved, the water consumption is lowered by 30 percent simultaneously, and the gypsum mold strength and drying efficiency are increased; the linear shrinkage of the gypsum mold can be remarkably lowered by using the gypsum mold formula together with barium chloride and urea; moreover, a solvent component consisting of tap water is adopted, so that the problems of high water consumption, poor fluidity, low strength, large size deformation, difficulty in breaking and the like existing in an ordinary gypsum mold are solved; and meanwhile, the problems of oxidization and combustion of the magnesium alloy are solved.

The invention relates to a high-temperature anti-oxidation coating for a steel billet of plain carbon steel and a preparation method of the high-temperature anti-oxidation coating. The technical scheme is as follows: a component A and a component B which are sub-packaged are mixed according to the mass ratio of (0.8-2):1 and are mechanically stirred when the high-temperature anti-oxidation coating is used, wherein the component A is prepared from the chemical components in percentage by mass: 20-35% of alumina powder, 20-30% of silicon dioxide powder, 15-25% of magnesia powder, 5-15% of calcium oxide powder, 5-10% of zirconium dioxide powder, 2-5% of sodium carbonate powder, 2-5% of potassium carbonate powder, 2-5% of iron oxide powder and 1-5% of aluminum powder; and the component B is prepared from the chemical components in percentage by mass: 1-5% of (CH2O)n, 4-10% of (C12H22O11)n, 5-15% of (C6H10O5)n, 0.5-2% of polyvinyl alcohol, 0.1-1% of sodium carboxymethylcellulose, 0.1-0.8% of hydroxyethyl cellulose and the balance of water. The high-temperature anti-oxidation coating has the characteristics of good anti-oxidation effect, high applicable temperature, self-falling capacity, safety, environment friendliness and low cost.

The invention discloses a soaking treatment method for oil repellency and antioxidation of a copper net or foamy copper. The soaking treatment method comprises the following steps of: soaking the copper net or the foamy copper in a mixed solution including the components of 1.0mol / L-2.0mol / L of hydrochloric acid, 2g / L-5g / L of a surfactant, 1g / L-3g / L of fluorosilane and alcohol in concentration, wherein the water-bath heating temperature is 30 DEG C to 90 DEG C, the soaking time is 5 minutes to 30 minutes; washing the soaked and treated copper net or foamy copper by deionized water, and putting the washed copper net or foamy copper to an oven for curing for 0.5 hour to 1.5 hours under the temperature of 150 DEG C to 250 DEG C; and taking out the cured copper net or foamy copper to obtain the bright oil-repellent anti-oxidant copper net or foamy copper. The soaking treatment method disclosed by the invention can be used for effectively preventing the formation of an oxide layer.

The invention discloses a bionic antioxidant polypropylene material and a preparation method thereof. The preparation method comprises the following steps: preparing polydopamine particles by taking dopamine as a raw material, or preparing black pigment particles by taking tyrosine as a raw material, mixing the black pigment particles or the polydopamine particles with polypropylene according to aratio of 0.1: (100-10), dropwise adding 0.1% of paraffin, and stirring for 5-10 minutes in an electric stirrer at a high speed; adding an obtained mixture to an extruder, controlling the temperatureof the extruder to be 160-180 DEG C, 170-190 DEG C and 180-200 DEG C, the ultrasonic frequency to be 10-20 kHz, the ultrasonic frequency is 0-400 W, extruding and granulating to obtain the bionic antioxidant polypropylene resin, and further processing and molding the granules to obtain required bionic polypropylene films, sheets, pipes or fibers and other materials.

The invention discloses a stretch bender oil mist sprayer comprising a housing; the housing is connected with an air inlet pipe, an air outlet pipe and an oil inlet pipe; a buffer cavity is arranged in the housing; a soft pipe connected with the rear end of the air inlet pipe is provided with a pressure controller; the pressure controller comprises an upper seat and a lower seat; the top of upper seat is provided with a motor; the lower seat is connected with a fixed block; the fixed block is connected with a globe bearing; the globe bearing is connected with a sleeve pipe in a slide manner; an inner wall of the sleeve pipe is screwed with an output shaft of the motor; a spring slot is arranged in the globe bearing; a pressure spring is arranged in the spring slot, and presses against a steel ball; slide friction force between a sleeve pipe outer wall and the steel ball is bigger than a rotary friction force between the output shaft and the sleeve pipe when the output shaft of the positive-negative rotation motor rotates in the sleeve pipe; the bottom surface of the upper seat and the top surface of the lower seat are provided with corresponding arc slots clamped on the soft pipe. The stretch bender oil mist sprayer can spray on the surface of aluminum and aluminum alloy belt material so as to form a protection oil film, thus effectively preventing product oxidation, and scratches between layers in the product transport process can be prevented.

The invention provides an anti-oxidation method for superfine copper powder. The superfine copper powder produced with the pure water washing electrolytic method meets requirements; one or two of benzene propane nitrile triazole, methyl benzene propane nitrile triazole and citric acid is / are utilized for preparing first antioxidant; ascorbic acid or glucose is utilized for preparing second antioxidant; the first antioxidant is poured into washed copper powder to a scale for soaking, and the second antioxidant is added for soaking; and then filtering, drying and sieving are performed to accomplish the anti-oxidation treatment on the superfine copper powder. Aiming at the superfine copper powder produced with the electrolytic method, the anti-oxidation method for superfine copper powder enables the oxidation of the copper powder in the drying process to be prevented, the excellent performance of the superfine copper powder is maintained, and under the pressure of 2MPa, the measured resistivity of the copper powder is 3.0*10<-6>-4.0*10<-6> ohmm, and the oxygen content is 0.10-0.20%. The anti-oxidation method for the superfine copper powder is suitable for the industries of electrical carbon, powder metallurgy parts, diamond tools and the like.

The invention discloses an online spraying device for steel billet anti-oxidation coating. The online spraying device comprises a steel billet information detecting system, a steel billet pretreatmentsystem for treating the surface of the steel billet, a spraying system and a conveying roller. The steel billet enters a heating furnace sequentially through the steel billet information detecting system, the steel billet pretreatment system and the spraying system along with the conveying roller. The steel billet information detecting system includes an inductive probe for detecting the surfacetemperature and length of the steel billet and a central processor. The inductive probe is connected with the central processor. The steel billet pretreatment system and the spraying system are connected with the central processor. The inductive probe detects the surface temperature and length of the steel billet, when the temperature is higher than 600 DEG C, the central processor will not make any instructions, and when the temperature is not higher than 600 DEG C, the central processor will calculate the opening time and operating time after the opening of the steel billet pretreatment system and the spraying system and instruct the same to enter a state ready to operate. The invention further discloses an online spraying method for steel billet anti-oxidation coating.

The invention discloses an aluminum alloy mirror surface anodic oxidation method, which comprises the following steps: S1, cleaning: placing the aluminum alloy in an ultrasonic cleaning machine, and degreasing and cleaning the aluminum alloy by a degreasing agent solution; S2, acid pickling: immersing the aluminum alloy in an acid solution to remove an oxide film layer on the surface of the aluminum alloy, after a period of time, performing neutralization treatment on the the aluminum alloy in an alkaline solution, and finally rinsing the the aluminum alloy with deionized water to remove the residual alkaline solution; S3, anodic oxidation: immersing the aluminum alloy in an electrolyte, and turning on a power supply to carry out an anodic oxidation treatment. According to the invention, through a reasonable surface treatment on the aluminum alloy before the anodic oxidation and a hole sealing treatment by a specific hole sealing agent after the anodic oxidation, the quality of an oxide film formed on the surface of the aluminum alloy is greatly improved, and the formed oxide film has good wear-resistant and anti-oxidation effects, so that the service performance of the aluminum alloy is effectively improved.

The invention relates to the field of stranded wires for railways, in particular to a method for manufacturing a copper-magnesium alloy stranded wire for a cold tinned railway.The method comprises the following steps that 1, a copper-magnesium alloy rod is connected, extruded and drawn to form a copper-magnesium alloy single-wire blank; 2, the copper-magnesium alloy single-wire blank is subjected to surface treatment; 3, the copper-magnesium alloy single-wire blank treated with surface treatment fluid is subjected to blowing and washing many times; 4, the copper-magnesium alloy single-wire blank obtained in the step 3 is subjected to acid pickling; 5, the copper-magnesium alloy single-wire blank subjected to acid pickling is blow-dried and placed in an electroplate liquid tank for electrotinning; 6, the copper-magnesium alloy single-wire blank is drawn many times through a drawbench, and copper-magnesium alloy single wires of the specified size are manufactured; 7, the copper-magnesium alloy single wires are stranded into the copper-magnesium alloy stranded wire.The production process is simple, the process operation reliability is high, the tinning effect is good, and high corrosion resistance is achieved.

The invention discloses a processing technology of a coaxial cable. The processing technology comprises the following steps of 1) arranging annular sleeves on two disc side walls of a disc, wherein the two annular sleeves are opposite to each other and can be pressed and slide out relative to the disc; 2) winding the processed semi-finished product of the coaxial cable on the disc to form a semi-finished disc; 3) allowing the annular sleeves to slide out of a side of the semi-finished disc to sleeve an outer side of the semi-finished disc; and 4) wrapping an isolation film on the semi-finisheddisc and at the peripheries of the annular sleeves so that external air and the semi-finished disc are isolated. By the processing technology, the annular sleeves can slide outwards and sleeve the periphery of the semi-finished disc after the semi-finished product is wound to form the semi-finished disc, the annular sleeves and the semi-finished disc can be simultaneously wrapped by the isolationfilm, the external air can be effectively isolated due to the presence of the annular sleeves sleeving the semi-finished disc, the external air is prevented from entering a gap between the disc and the semi-finished disc, and the method is good in oxidization-resistant effect.