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A rare gas of argon. Used as a shield gas for arc welding (cutting) stainless steel, magnesium, aluminum, and other alloys. Also used in smelting of steel, aluminum, titanium and zirconium. Argon discharge purple glow, but also for lighting technology and filling fluorescent lamps, photocell, lighting tubes. During the brewing process, the fillings in the beer barrel displace oxygen to prevent the raw material in the beer barrel from being oxidized to acetic acid. Heat treatment process is also used to replace nitrogen and ammonia, the effect is more than nitrogen and ammonia, stainless steel heat treatment using argon to protect the bending effect is better not easy to break.
Health hazards: non-toxic under normal atmospheric pressure. High concentration, the oxygen partial pressure to reduce the occurrence of suffocation. Argon concentration of 50% or more, causing serious symptoms; more than 75%, can die within a few minutes. When the concentration of argon in the air increases, the first occurrence of respiratory acceleration, inattention, ataxia. Followed by fatigue, irritability, nausea, vomiting, coma, convulsions, resulting in death. Liquid argon can cause skin frostbite; eye contact can cause inflammation. Toxicological information and environmental behavior Hazard characteristics: In case of high fever, the container pressure increases, the risk of cracking and explosion.
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