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583results about How to "Good corrosion resistance" patented technology

Petroleum wellhead annular space sealing device

The invention discloses a petroleum wellhead annular space sealing device. The petroleum wellhead annular sealing device is used for sealing an annular space between a wellhead sealing body and a petroleum pipe, at least one annular groove is formed in the inner wall surface of the sealing body, and the sealing body is provided with an injection hole which is communicated to a centrifugal end of the annular groove; the petroleum wellhead annular space sealing device further comprises a sealing ring, a power ring, and an injection component, wherein the sealing ring is embedded into the annular groove, the sealing ring is used for sealing the groove in the radial direction by being jointed to the wall surface of the annular groove, and is used for sealing the annular space by being jointed to the outer wall of the petroleum pipe, the power ring is installed in the annular groove and is located between the groove bottom of the annular groove and the sealing ring, and the injection component is installed in an inlet of the injection hole, and is used for injecting fluid with given pressure so as to make the power ring push the sealing ring to tightly press the petroleum pipe. In the petroleum wellhead annular space sealing device, the requirement for deformation capability of a sealing part is low, and meanwhile the sealing capability can be effectively improved.
Owner:DEZHOU UNITED GASOLINEEUM MACHINERY

Self-lubricating passivation solution and hot galvanizing self-lubricating coating steel sheet coated thereby

The invention discloses a self-lubricating passivation solution and a hot galvanizing self-lubricating coating steel sheet coated thereby. The self-lubricating passivation solution is formed by modified solid lubricants, a film forming matter, a film forming additive, an accelerant, a pH modifier, an organic solvent and deionized water through compounding. The solid content after compounding is 15-25%, and the modified solid lubricants are modified nanometer MoS2 and modified nanometer teflon particles. According to the total weight of 1000g, the self-lubricating passivation solution comprises the following components: 10-20g/kg of modified nanometer MoS2, 10-20g/kg of modified nanometer teflon particles, 80-120g/kg of film forming matter, 10-30g/kg of film forming additive, 5-15g/kg of the accelerant and the balance of mixed solution of the organic solvent and the deionized water; and the pH value is adjusted to 3-6 by the pH modifier. The hot galvanizing self-lubricating coating steel sheet coated by the self-lubricating passivation solution comprises a hot galvanizing substrate and a self-lubricating coating attached to the hot galvanizing substrate. The self-lubricating passivation solution does not contain Cr<6+> and other environmentally harmful substances and has environmental protection property, corrosion resistance, wear extreme pressure resistance as well as coating and self-lubrication properties.
Owner:ANHUI UNIVERSITY OF TECHNOLOGY +1

High isolation protection material and preparation method thereof

The invention relates to a protective material with high barrier property and a method of preparation of the material. The protective material is composed of an anti-tear layer, an adhesive layer, a high barrier layer, and a seal layer from outer to inner successively, wherein, the high barrier layer can prevent biochemical toxic agent and toxic gas from passing and has the function of corrosion resistance; the seal layer is made of film materials with better thermal stability and mechanical strength, and has the protective effect for high barrier layer; the adhesive layer can mainly increase the binding force between fabric and barrier film, and prevent delamination; the anti-tear layer is made of fabric which is flame retardant or non-flame retardant and can increase the anti-tear function of the composite layer and strength force of all directions of the composite material. The layers are adhered together by adhesive, and then made into protective materials with high barrier property which has multilayer and various protective functions. The protective material has the advantages of excellent anti-tear property, excellent corrosion resistance, and light weight, which can be used for emergency rescue clothing, biochemical protective clothing, risk chemical dealer protective clothing, missile and rocket inflowing protective clothing, etc.
Owner:THE QUARTERMASTER EQUIPMENT RESEARCH INSTITUTE OF THE GENERAL LOGISITIC DEPARTME +1

Nanometer Zn crystal boundary modified sintered NdFeB magnet with high corrosion resistance and preparation method thereof

The invention discloses a preparation method of nanometer Zn crystal boundary modified sintered NdFeB magnet with high corrosion resistance, comprising the following steps: 1) main-phase alloy and crystal boundary phase alloy are respectively prepared, wherein, the main-phase alloy adopts casting technology or rapid hardening melt-spun technology to prepare a cast ingot or a rapid hardening thin strip, and the crystal boundary phase alloy adopts rapid quenching technology to prepare a rapid quenching strip; 2) the prepared main-phase alloy and crystal boundary phase alloy are respectively prepared into powder; 3) nanometer Zn powder is mixed with the crystal boundary phase alloy powder to evenly disperse the mixture on the crystal boundary phase alloy powder surface; 4) after nanometer Zn modified crystal phase alloy powder is evenly mixed with the main-phase alloy powder, orientation compression in a magnetic field is prepared into a green body; 5) the green body is sintered in a high vacuum sintering furnace and tempered to prepare the final magnet. The sintered NdFeB magnet prepared by the method of the invention has high performance, favourable corrosion resistance, simple technology and simple operation, and is favourable for batch production on large scale.
Owner:ZHEJIANG UNIV

Laser weld-bonding method of bipolar plate of fuel cell

The invention relates to a laser weld-bonding method of bipolar plates of a fuel cell. The method combines a bonding process and a laser welding process to connect the bipolar plates of the fuel cell, namely a normal-temperature curing adhesive is used to bond welding areas of the bipolar plates of the fuel cell, and then the laser welding is carried out to finish the connection of the bipolar plates of the fuel cell. Compared with the prior art, the laser weld-bonding method has the advantages that: because an adhesive bonding method is adopted to bond the bipolar plates of the fuel cell tightly, the phenomenas of sealing-off and welding seam breakage caused by assembling gaps in the laser welding are eliminated, the laser welding quality is improved, and the welding seam is high in mechanical strength and is corrosion resistant; a bond layer can evaporate rapidly under the high-heat input of a laser beam, the requirement of the bonding position is reduced; because the normal-temperature curing adhesive is adopted, the secondary heat input caused by high-temperature curing is avoided; and due to the introduction of the bonding process, the designs of a welding clamp, a welding path and welding parameters can be more flexible and simpler, so that the laser weld-bonding method is easy in large-scale production.
Owner:SHANGHAI JIAO TONG UNIV +3

Test device for testing horizontal and vertical saturated infiltration coefficients of coarse-grained soil simultaneously indoors under different pressure

The invention discloses a test device for testing horizontal and vertical saturated infiltration coefficients of coarse-grained soil simultaneously indoors under different pressure. The device comprises a loading system, a water supply system, a soil sample chamber and a pressure measurement system, wherein the loading system comprises a reaction frame, a pressure adjusting valve, a gas-pressure meter and a double-layer loading plate; the double-layer loading plate is a hollow hexahedron and comprises an upper-layer porous plate, a lower-layer porous plate, a middle partition board and a sideinclined plate; the water supply system comprises a water supply tank, a water storage tank, a vertical water supply cavity formed by the double-layer loading plate, a left horizontal water supply cavity and a right horizontal water supply cavity; each of the left horizontal water supply cavity and the right horizontal water supply cavity is formed by an outer porous plate, an inner porous plate and a silicon base plate filling a gap between the two porous plates. The horizontal and vertical saturated infiltration coefficients of the same sample are simultaneously tested under different pressures, the test device is not required to be dismounted in the testing process, the test device is convenient to operate, and the testing efficiency and accuracy are greatly improved.
Owner:ZHEJIANG UNIV

Ferritic stainless steel and method for manufacturing same

The invention relates to a ferritic stainless steel which comprises the following chemical components in percent by weight: 0.001-0.025% of C, less than1.0% of Si, less than 1.0% of Mn, less than 0.03% of P, less than 0.010% of S, 17-20% of Cr, 1.70-2.00% of Mo, less than 0.02% of Al, 0.005-0.025% of N, less than 0.0100% of O, less than 0.2% of Nb, 0.10-0.15% of V, less than 0.5% of Ni and the balance of Fe and inevitable impurities. A method for manufacturing the ferritic stainless steel comprises the following steps: smelting by using a vacuum induction furnace, or by using an electric arc furnace through external refining or by using a converter through external refining; continuously casting, wherein the degree of superheat is controlled at 30-50 DEG C, and the slab pulling speed is controlled at 0.8-2m/min; pouring at 1,580-1,600 DEG C; heating the continuously-cast billet to 1,050-1,100 DEG C, and hot rolling, wherein the finish rolling temperature is 800-900 DEG C, and the hot rolling reduction is more that 90%; cooling in air; continuously annealing the hot-rolled strip steel, and pickling, wherein the annealing temperature is 950-1,050 DEG C, the temperature is preserved for 1-1.5t min, and the t represents the thickness (mm) of the strip steel. The ferritic stainless steel has excellent impact toughness, corrosion resistance and mechanical properties.
Owner:BAOSHAN IRON & STEEL CO LTD

Preparation method of stainless steel-resin composite and stainless steel-resin composite prepared by same

ActiveCN103895151AGood corrosion resistanceEasy to corrodeMetal layered productsPolymer chemistryResin composite
The invention relates to a preparation method of a stainless steel-resin composite and a stainless steel-resin composite prepared by the same. The preparation method comprises the following steps: S1. coating an ink on the surface of a pretreated stainless steel substrate in need of combining resin to obtain a stainless steel substrate of which part of surface is coated with an ink layer; S2. carrying out oxidization and passivation on the stainless steel substrate of which part of surface is coated with an ink layer, which is obtained in the step S1; S3. removing the ink layer coated on the surface of the stainless steel substrate obtained in the step S2; S4. putting the stainless steel substrate obtained in the step S3 into an acid and/or salt solution containing 2-30 wt% of A<-> to perform electrochemical corrosion, wherein A is halogen; and S5. carrying out injection molding on a resin composition onto the surface of the stainless steel substrate obtained in the step S4, and forming to obtain the stainless steel-resin composite. The prepared product has the advantages of strong binding force between stainless steel and resin, simple technique, no pollution and low cost, can easily implement large-scale production, and can not cause corrosion of the non-injection molding region of the stainless steel.
Owner:BYD CO LTD

Environmental protection ashing treatment process of calendaring copper foil

ActiveCN104962965AGood corrosion resistanceGood high temperature oxidation resistanceGalvanic depositionAshing
The present invention discloses an environmental protection ashing treatment process of calendaring copper foil. The environmental protection ashing treatment process comprises degreasing washing, roughening electroplating, curing electroplating, nickel alloy electroplating, zinc electroplating, chromate passivation treatment, silane treatment and the like. According to the present invention, after electrochemical degreasing, roughening and curing treatment (roughening and curing can be selected more than two times according to the requirement) Cu grain electrodeposition are performed on the calendaring copper foil, the nano-scale nickel alloy is electrodeposited under the acidic condition, the thin metal zinc layer is electroplated, and finally the chromate passivation treatment is performed and the silane coupling agent is uniformly sprayed on the surface; As, Sb, Cd and other toxic and harmful metals are not added, and the alloy system electrodeposition and other relatively simple processes are used to treat the process; and under the optimization of the process parameters, the environmentally friendly surface treated copper foil with characteristics of good performance, meeting of FPC production requirements, gray appearance of gray, no toxicity and no harm can be obtained.
Owner:LINGBAO JINYUAN ZHAOHUI COPPER
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