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Large steel water tanks have the following characteristics:
(1) light and high strength, the relative density of 1.5 to 2.0, and only 1/4 to 1/5 of carbon steel, but the tensile strength is close to or even more than carbon steel, and high strength compared with alloy steel phase ratio. Therefore, in aviation, rockets, spacecraft, high pressure vessels and other products need to reduce the weight of the application, have excellent results. Some epoxy FRP tensile, bending and compressive strength can reach more than 400Mpa. The density, strength and specific strength of some materials are shown in Table 1-1.
(2) large steel water tank corrosion resistance
FRP is a good corrosion-resistant materials, water tanks on the atmosphere, water and general concentrations of acid, alkali, salt and a variety of oils and solvents have better resistance. Chemical corrosion has been applied to all aspects, is to replace carbon steel, stainless steel, wood, non-ferrous metals.
(3) good electrical properties
Water tank shell is an excellent insulating material, used to make insulators. High frequency can still protect the good dielectric properties. Microwave transmission is good, has been widely used in radar radome.
(4) thermal performance is good
FRP low thermal conductivity, room temperature is 1.25 ~ 1.67kJ / (m · h · K), only the metal 1/100 ~ 1/1000, is an excellent insulation material. In the case of ultra-high temperature, is the ideal thermal protection and ablative materials
(5) can be designed and good
① can be based on the need to flexibly design a variety of (large steel water tank) structure products to meet the use requirements, can make products have a good overall.
② materials can be fully selected to meet the performance of products, such as: can be designed to decay resistance, instantaneous high temperature, the product of a particular direction of high strength, good dielectric, and so on.
(6) excellent process
① can be based on product shape, technical requirements, use and quantity to flexibly choose the molding process.
② The process is simple, can be a forming, highlighting the economic effects, especially for complex shape, not the number of small molding products, but also highlights its superiority of the process.