A dinitrogen tetroxide-resistant inorganic plugging and sealing material, its preparation method and application

A dinitrogen tetroxide and sealing material technology, which is applied in the field of materials and technology, can solve the problems of unsuitable dinitrogen tetroxide plugging and sealing materials, the content is lower than the technical index requirements, and the plugging agent cannot withstand pressure, etc., to achieve product quality Stability, low cost, and the effect of improving sealing performance

Active Publication Date: 2019-04-09
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Leakage of dinitrogen tetroxide occurs from time to time in China, and a paste made of plaster of paris, sodium silicate and asbestos powder was used as an emergency plugging measure, but the plugging agent cannot withstand pressure and can only be used as a temporary measure; Adhesive combined with carbon fiber and pickling asbestos, under pressure plugging under the action of curing agent and coagulant, but the material formula contains free water, which is easy to react with dinitrogen tetroxide to form nitric acid, causing serious damage to equipment ; At the same time, the entry of water will also consume the corrosion inhibitor hydrofluoric acid in the dinitrogen tetroxide, making its content lower than the technical index requirements, so this material is not suitable as a long-term dinitrogen tetroxide-resistant plugging and sealing material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A dinitrogen tetroxide-resistant inorganic plugging and sealing material, including components in parts by mass: 100 parts of aluminum phosphate glue with a neutralization degree of 50%, as component A; white corundum powder WA10#, 240#, 40 parts of 320# each, 10 parts each of fused magnesia 100-150 mesh, 150-200 mesh, and >200 mesh, and stir evenly to obtain component B.

[0021] When using glue, mix components A and B according to the mass ratio of 1:1.5, and then it can be used. The prepared dinitrogen tetroxide-resistant inorganic plugging and sealing material has a tensile shear strength of 1.08MPa, a compressive strength of 9.1MPa, and a helium mass spectrometer leak rate of 3.2×10 under 1MPa pressure. -6 Pa·m 3 / S, curing time 16min.

Embodiment 2

[0023] A dinitrogen tetroxide-resistant inorganic plugging and sealing material, including components in parts by mass: 100 parts of aluminum phosphate glue with a neutralization degree of 50%, as component A; white corundum powder WA10#, 240#, 40 parts each of 320#, 15 parts each of 100-150 mesh fused magnesium oxide, and 15 parts each of 150-200 mesh, stir well to obtain component B.

[0024] When using glue, mix components A and B according to the mass ratio of 1:1.5, and then it can be used. The prepared dinitrogen tetroxide-resistant inorganic plugging and sealing material has a tensile shear strength of 1.12MPa, a compressive strength of 8.37, and a helium mass spectrometer leak rate of 2.6×10 under 1MPa pressure. - 6 Pa·m 3 / S, curing time 13min.

Embodiment 3

[0026] A dinitrogen tetroxide-resistant inorganic plugging and sealing material, including components in parts by mass: 100 parts of aluminum phosphate glue with a neutralization degree of 50%, as component A; white corundum powder WA10#, 240# each 50 parts, 20 parts of borax, 15 parts of 100-150 mesh fused magnesium oxide, 15 parts of 150-200 mesh each, and stir evenly to obtain component B.

[0027] When using glue, mix components A and B according to the mass ratio of 1:1.5, and then it can be used. The prepared dinitrogen tetroxide-resistant inorganic plugging and sealing material has a tensile shear strength of 1.37MPa, a compressive strength of 10.2MPa, and a helium mass spectrometer leak rate of 3.8×10 under 1MPa pressure. -6 Pa·m 3 / S, curing time 11min.

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Abstract

The invention provides an inorganic leakage-stopping sealing material resistant to dinitrogen tetroxide as well as a preparation method and an application. According to the inorganic leakage-stopping sealing material resistant to dinitrogen tetroxide, the sealing performance of an inorganic adhesive is improved, and viscosity before material curing is reduced; a basal body of the inorganic leakage-stopping sealing material is an aluminum phosphate glue solution, and a curing agent is fused magnesia; and the inorganic leakage-stopping sealing material resistant to dinitrogen tetroxide with characteristics of being capable of being cured at the room temperature, simple in process, convenient in operation, good in controllability and stable in product quality is prepared.

Description

technical field [0001] The invention belongs to the technical field of materials and processes, and in particular relates to a dinitrogen tetroxide-resistant inorganic plugging and sealing material, a preparation method and application thereof. Background technique [0002] As a liquid propellant, dinitrogen tetroxide is widely used in the military field. As an oxidant, dinitrogen tetroxide is highly corrosive, flammable, explosive, volatile, and highly toxic. Accidents such as leakage, personnel poisoning, and explosions are prone to occur during transportation, use, and operation. These constructions will not only cause major economic losses, but also have extremely serious impacts on the environment. At present, the plugging and sealing materials on the market include gel plugging agents, resin plugging agents, and expansive plugging agents, which are widely used in the pipeline industry. These three chemical plugging agents cannot withstand the strong penetration of dini...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J1/00C09J11/04
CPCC09J1/00C09J11/04
Inventor 江余敏孙春燕唐波李润源王昕
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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