加氢反应流出物空冷器系统模拟及腐蚀研究

探讨了加氢反应流出物空冷器系统的腐蚀机理。通过配制模拟腐蚀溶液,采用电阻探针和CMB-1510B便携式瞬时腐蚀速率测量仪等腐蚀速率测试装置,在实验室条件下,研究了各种工艺条件对年腐蚀速率的影响,所研究的条件包括缓蚀剂的浓度、腐蚀因子、pH值和协同效应。结果表明,苯并三唑(BTA)是一种应用于加氢反应流出物空冷器系统的优良缓蚀剂,在NH4Cl溶液中缓蚀剂六偏磷酸钠与硫酸锌复配物具有良好的协同缓蚀作用;同时也表明随着腐蚀因子的增大年腐蚀速率明显增加,总的来说,低pH值范围内年腐蚀速率随pH值的降低而明显增大,高pH值对年腐蚀速率的影响有所减小。

Corrosion and Simulative System of Hydrogenation Reactor Effluent Air Coolers

The corrosion mechanism of system of hydrogenation reactor effluent air collers was approached.By confecting simulation corrosion solution,it was researched the effect of experimental in various conditions on annual corrosion rate by means of the corrosion rate testing equipment of resistance probe and CMB-1510B portable instantaneous corrosion rate meterage.The investigated conditions included concentration of corrosion inhibitor,corrosion factor(Kp),pH value and synergistic effect.Results show that BTA corrosion inhibitor is an excellent inhibitor for system of hydrogenating reactor effluent air coolers,there exists good synergistic effect between(NaPO3)6 and ZnSO4 compounds in NH4Cl solution;at the same time,also indicate that annual corrosion rate rises obviously with the increase of corrosion factor,annual corrosion rate rises obviously with the decrease of it when pH value changes in lower range,effect of high pH value on annual corrosion rate lessens on the whole.