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Tubular graphite heat exchangers have various tube plate material, the graphite tube plate, stainless tube plate and titanium tube plate and carbon steel tube plate (needing anti-corrosion treatment) ,these several tube plate material have the advantages and disadvantages in the application of the soda ash, let’s explore it in the following several aspects . The Comparison of corrosion resistance. Corrosion in soda production is still quite strong, especially in the ammonium chloride section containing NH4 +, Cl -, CO32 -, Na + corrosive mediumthe of united alkali production , the corrosion resistance requirements for equipment is more higher. Graphite is widely used in chemical production because of its excellent corrosion resistance, especially the corrosion resistance for CL-. Stainless steel also…
The main method to increase carbon carbon composite material oxidation resistance are surface coating technology and carbon matrix modification. The traditional methods mainly include carbon fiber modification, liquid phase impregnation, additive agent, matrix replacement etc. Carbon carbon composite material has low density, high strength,high modulus,high thermal conductivity,low coefficient of expansion and thermal shock resistance etc. These properties can maintain under the 2000 centigrade,can make the carbon carbon composite material to be the preferred material of high thermal structure material, and it’s widely used in the aerospace field. However,most of the properties can only maintain under the inert environment. Carbon carbon composite material will occure oxidation when the tempterature reach 400 centigrade,the oxidation can reduce the strength of the material,and will…
By changing the machining method of the carbon carbon composite material,the C/C nozzle can meet CNC machining,it can avoid the various defects made by manual processing,improve the qualified rate, increase the workshop processing ability. Nowadays,carbon carbon composite material is the main development trend of tactical missile throat material,the high-property carbon carbon composite nozzle is mostly made of 4D C/C material. The carbon carbon composite nozzle in the SRM has a high property requirement,mainly include ablation resistance property,high stability,machinable and can be mass production,now it need low cost. The normal turning machine is low machining accuracy and influenced personaly too much,the machining surface is not uniform,to confirm the quality of the carbon carbon composite nozzle,it should be processed more accuract. The…
