硫酸磷酸强腐蚀性环境中应用的新2号A合金

New No.2-A Alloy- An Alloy Developed for Severe Corrosion Environment Containing Sulphuric Acid and Phosphoric Acid

新２号Ａ合金是一种铁镍基奥氏体耐蚀合金。在硫酸中耐蚀的温度、浓度范围比ＵＢ—６合金明显扩大，且在含有适当数量Ｃｌ、Ｆ的硫酸介质中仍能维持较好的耐蚀性，在湿法磷酸中，和Ｓａｎｉｃｒｏ２８合金一样成为耐蚀性最好的换热器结构材料。

New No. 2-A Alloy is a iron-nickel basedaustenitic alloy. The temperature and concentration range of useful corrosion resistance in sulphuric acid is much more extended beyond thatfor UB-6, furthermore, it remains good corrosionresistance in Cl-, F- contained sulphuric acid. Inwet process phosphoric acid manufacture, newNo. 2-A Alloy is fully comparable with Sanicro28 for construction material of heat exchanger.