31results about How to "Good oxidation and corrosion resistance" patented technology

The invention provides an oxidation-prevention preparation for a carbon product. With water or other solvents for modulation, the oxidation-prevention preparation can be attached to the outer surface of the carbon product and forms an oxidation-prevention thin layer after being dried or sintered, and the oxidation-prevention preparation contains a mixture or a compound of silicon dioxide and aluminum oxide and additionally contains various components capable of improving the physical property of the oxidation-prevention thin layer. The oxidation-prevention preparation comprises a semiconductor metallic oxide improving electric conductivity and a metal oxide having the capability of resisting slag abrasion and can have a substance improving the thermal shock resistance. The oxidation-prevention preparation has good oxidation corrosion resistance, good slag abrasion resistance, very good thermal shock resistance in high-temperature and high-oxygen environments and long in service life.

The invention discloses an abrasion-proof and corrosion-resistant nickel-based alloy wire and a preparation method thereof. The alloy wire comprises the following components: 17-21% of C, 20-25% of Co, 1.8-2.2% of W, 6.4-9.5% of Mo, 1.4-1.8% of Al, 3.2-4.5% of Ti, 0.1-0.5% of Nb, 0.1-0.5% of Hf, 1.2-1.8% of Ta, 0.03-0.06% of Re, 0.01-0.05% of Ce, 0.02-0.1% of C, 0.005-0.015% of B, 0.02-0.07% of Zr, 0.005-0.008% of Mg, and the balance Ni. The preparation technology of the alloy comprises the steps of vacuum smelting, remelting, forging, hot rolling, drawing, solid solution treatment and aging treatment, namely, raw materials are prepared and smelted based on mass percent and then smelted; the smelted materials are forged and rolled into obtain alloyed wire rods; the alloyed wire rods are drawn at a plurality of times to obtain phi 0.05-0.4mm alloy wires; finally the alloy wires are subjected to solid solution treatment and aging treatment. The abrasion-proof and corrosion-resistant nickel-based alloy wire can be used as a brush wire material for brush sealing of an aircraft engine, a gas turbine, etc., thus the brush sealing effect can be effectively improved, and the service life can be prolonged.

The invention provides a method for preparing an anti-uranium-tantalum-oxide film on the metal uranium surface, belongs to the technical field of material surface treatment, and particularly relates to a method for preparing an anti-uranium-tantalum-oxide film for protecting a metal uranium material surface, aiming at solving the problem that a metal uranium material has active chemical property,and is extremely easily oxidized, etched and failed in application. The method comprises the step of preparing an anti-uranium-tantalum-oxide film on the surface of a metal uranium film or metal uranium block from a uranium-tantalum alloy target which serves as a target by adopting direct-current magnetron sputtering; or preparing the anti-uranium-tantalum-oxide film on the surface of a metal uranium film or metal uranium block from a metal uranium target or metal tantalum target which serves as a target by adopting dual magnetron sputtering co-deposition method. The uranium-tantalum film hasexcellent antioxidation performance, has excellent interface bonding force and chemical compatibility with a uranium material. The method is mainly used for preparing an anti-uranium-tantalum-oxide film on the metal uranium surface.

The invention discloses a new type of cleaning powder, which is mainly used for cleaning glass, especially optical glass. Lotion 5-35%, chelating agent 5-35%. It not only solves the problem of poor versatility of the existing formula, but also makes the properties of the cleaning powder more stable, durable and better in effect.

The invention belongs to the field of deformed superalloy materials for aero-engine turbine discs; it relates to a deformed turbine disc alloy material for 850°C and a preparation process; the invention generates carbides in the alloy by adding higher element C, and through control The addition of W and Mo elements avoids the precipitation of TCP phase in the alloy; adding trace rare earth elements to the alloy for composite microalloying, further improving the thermal strength of the alloy, and using pre-melted slag containing rare earth elements for electroslag remelting. The electroslag used for remelting adds trace rare earth elements to ensure the alloy composition; the segregation of the ingot composition is small; the alloy of the present invention uses a small-sized electrode ingot, and at the same time, combined with the triple smelting process, it helps to reduce the alloy composition segregation. The alloy prepared by the invention has the advantages of uniform composition, good high-temperature mechanical properties and the like, and can meet the requirements of high-thrust ratio advanced aero-engines for high-performance deformed alloy turbine disk materials.

The invention relates to an application of a tantalum-doped uranium film in a black cavity, belonging to the technical field of laser fusion engineering, and particularly relating to an application ofa tantalum-doped uranium film. The invention aims to solve the problem that in the existing uranium black cavity, the gold lining laser-X-ray conversion efficiency is insufficient, and the physicallyexpected non-lining uranium black cavity is poor in chemical stability, and the structure of the black cavity is not stable. The tantalum-doped uranium film is used as a black cavity lining protective layer or is applied to a black cavity as an energy conversion layer. The tantalum-doped uranium film has the advantages of being good in antioxidant corrosion resistance; as the lining protection layer, having the better interface bonding force and chemical compatibility, and higher energy coupling efficiency while protecting the uranium black cavity energy conversion layer; as the energy conversion layer, having the higher laser-X-ray conversion efficiency compared with Au and lower M-band X-ray yield, and being outstanding in chemical stability and structural reliability.