Ammonia water is also a strong corrosive liquid. For ammonia water storage tanks, the function of preventing corrosion is necessary. The material performance of ammonia water storage tank is also one of the factors that affect the corrosion protection of ammonia water storage tank. There are many materials for ammonia water storage tank, and the material performance of ammonia water storage tank is also different. Let's take a look at the introduction of material performance of ammonia water storage tank.
Polyperfluoroethylene propylene is referred to as FEP, F46 ammonia water storage tank; operating temperature: -200 ~ + 204 ℃. Polyperfluoroethylene is a copolymer of tetrafluoroethylene and hexafluoropropylene, so it is also referred to as F46. Excellent corrosion resistance, similar to PTFE. Except for a few media such as molten alkali metal, fuming nitric acid, chlorine fluoride, etc., it can resist the corrosion of almost all chemical media (including concentrated nitric acid and aqua regia). Excellent temperature resistance, long-term use at 200 ° C. Polyperfluoroethylene propylene has excellent heat resistance, low friction, non-stickiness and lubricity, chemical resistance, thermal stability and electrical insulation, and can be melt processed, so it has a wide range of applications and is easy to produce. Excellent impact resistance, creep resistance, and dielectric properties. Processing and forming performance is better than polytetrafluoroethylene.
Teflon is abbreviated as PTFE, F4 ammonia water storage tank; operating temperature: -200 ~ + 200 ℃. PTFE has very good corrosion resistance and heat resistance. Except for molten metal, chlorine trifluoride, oxygen trifluoride at high temperature, and high-flow liquid fluorine, it can resist almost all chemical media (including concentrated nitric acid). And aqua regia). It can be operated at 180 ~ 200 ℃ for a long time, and its heat resistance exceeds most plastics. It has excellent electrical properties, anti-adhesion and low coefficient of friction. Galvanic insulation: PTFE has excellent electrical characteristics and is independent of frequency and temperature. Coefficient of friction: The coefficient of friction of PTFE is the lowest among solids. Anti-sticking effect: PTFE is anti-sticking. Other substances do not stick to PTFE.
Tetrafluoroethylene ammonia water storage tank-perfluoroalkyl vinyl ether copolymer, referred to as PFA; operating temperature: -200 ~ + 260 ℃. Tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer is also known as perfluoroalkoxy resin. Because its long-term use temperature and performance are close to PTFE, and it can also be used for thermoplastic molding, it is called soluble polytetrafluoroethylene . Its chemical stability, physical and mechanical properties, electrical properties, lubricity, non-stickiness, aging resistance and non-combustibility are basically the same as PTFE, but high temperature mechanical properties are better. Bottom line: Corresponding to polytetrafluoroethylene, PFA can be processed with thermoplastic properties, and other characteristics are widely similar to polytetrafluoroethylene.