液化气钢罐的氢脆分析及防治对策

Analysis and Preventive Countermeasures for Hydrogen Embrittlement of Liquified Gas Tank

液化气中不可避免地会含有硫化氢和水分 ,湿的硫化氢与钢罐发生电化学反应 ,将造成钢罐内壁“氢脆鼓泡”现象 ,进而腐蚀损伤钢罐 ,留下安全隐患。分析表明 ,湿硫化氢和钢罐制作缺陷是产生此现象的主要原因 ,实例也证明了这一点。为避免这种现象的产生 。

It is unavoidable that hydrogen sulfides and moisture exist in liquified gas Hydrogen embrittlement and blister are resulted on the tank wall from electrochemical reaction induced by wet hydrogen sulfides with steel tank,from which corrosion is taken place on the tank,threating the safety of it Analysis indicates that wet hydrogen sulfides and the flaws of tank are the main reasons of this phenomenon,which is further proved by case study In order to prevent this phenomenon, preventive countermeasures are given respectively on tanks available and newly built ones