A kind of preparation method of anti-heat radiation coating of steel plate

Abstract

The invention discloses a method for preparing a steel plate anti-heat radiation coating, which is to disperse metal powder in a polar surfactant solution to form a metal powder emulsion, and then apply it to the surface of a hot-rolled steel plate by a cold spraying method or a plasma spraying method , and under the high temperature of the hot-rolled steel plate, the metal powder is melted and solidified to form a film. The anti-radiation coating of the present invention has a smooth surface of the film-forming substance, strong adhesion, and good performance of anti-radiation and high temperature resistance; at the same time, the anti-radiation coating of the present invention can be cured without heating to form a film after being prepared by spraying , can greatly save energy; and the spraying process is simple to operate, high reliability, simple and controllable film thickness, no pollution to the environment, no harm to operators, and has broad application prospects.

Description

technical field [0001] The invention relates to the field of radiation protection technology, in particular to a method for preparing a heat radiation protection coating on a steel plate. Background technique [0002] With the continuous development of the times, my country's social economy is gradually transforming, which promotes innovation and development in various fields, and the application of steel is more and more extensive to meet the current needs; It is easy to cause the surface atoms and oxygen to react due to thermal radiation to form oxides, that is, rust. This phenomenon is more obvious in the acid-base and salt environment. In addition to rusting the surface of the steel structure, thermal radiation will also cause stress. Concentration will cause the steel structure to be damaged before reaching its service life, especially after being subjected to repeated impacts, the fatigue strength will be further reduced and brittle fracture will occur; it can be seen th...

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Problems solved by technology

[0002] With the continuous development of the times, my country's social economy is gradually transforming, which promotes innovation and development in various fields, and the application of steel is more and more extensive to meet the current needs; It is easy to cause the surface atoms and oxygen to react due to thermal radiation to form oxides, that is, rust. This phenomenon is more obvious in the acid-base and salt environment. In addition to rusting the surface of the steel structure, thermal radiation will also cause stress. Concentration will cause the steel structure to be damaged before reaching its service life, especially after being subjected to repeated impacts, the fatigue strength will be further reduced and brittle fracture will occur; it can be seen that the corrosion of steel structures will cause harm to building safety, and may cause huge economic losses or Casualty accidents, therefore, effective radiation protection measures should be taken scientifically to protect steel from radiation and optimize the performance of steel

[0003] At this stage, hot-dip galvanizing, thermal spraying and paint radiation protection are the most important methods of radiation protection for steel structures at this stage. They have strong radiation protection advantages, such as good radiation protection effect, long radiation protection time, and relatively uniform coating. However, in the actual application process, hot-dip galvanizing will be limited by factors such as the volume of the aqueduct, and cannot be applied to large-scale steel structures, and it cannot be carried out on the construction site. It can only be carried out at designated locations, which increases transportation costs. Moreover, there is a process of heating and cooling after the hot-dip galvanizing process, which causes large deformation of the steel; the paint coating will age and pulverize in the paint radiation protection, resulting in continuous weakening of the protective effect, and there are many micro pinholes on the coating surface , exposed to the outside for a long time, water molecules and chloride ions will enter through the holes, causing corrosion to the basic metal inside, causing the outer paint layer to peel off, and the radiation protection performance is poor; thermal spraying can be applied to steel with a higher melting point, but A large amount of heat energy is consumed in the spraying process, which increases the cost

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