【摘要】 由油酸、多胺及改性试剂合成了4种咪唑啉衍生物。通过静态挂片失重法评价了咪唑啉缓蚀剂在不同矿化度的模拟盐水、饱和CO2的模拟盐水以及油田回注污水中对A3碳钢腐蚀的抑制作用。实验结果表明,所合成的咪唑啉缓蚀剂可以抑制溶解氧的腐蚀,对CO2的腐蚀抑制效果更好,10mg/L缓蚀剂D缓蚀率达95.36%。腐蚀介质的矿化度对缓蚀效果有一定影响,矿化度在10000~70000mg/L变化时,缓蚀率波动在10%~15%。油田回注污水实验表明咪唑啉型缓蚀剂适合应用于现场,尤其是偏酸性水质,腐蚀速率满足小于0.076mm/a的油田标准。更多还原

【Abstract】 Four imidazoline derivatives are synthesized from oleic acid,multi-amine and modifiers.The corrosion inhibition action to A3 steel of imidazoline corrosion inhibitor is investigated by weight-loss measurement,the corrosion mediums are simulated brine with different salinity,simulated brine being saturated with carbon dioxide and re-injected produced water of oilfield.The results of experiment indicate that the imidazoline inhibitors can inhibit the corrosion of dissolved oxygen and that the inhibition effect to CO2 corrosion is better than that to dissolved oxygen,the corrosion inhibition rate is 95.36% when the concentration of inhibitor D is 10mg/L.The corrosion inhibition rate changes between 10% to 15% when the mineralization of water changes from 10000mg/L to 70000mg/L.The result of re-injected produced water experiment shows that the imidazoline corrosion inhibitors are suitable for oil field and especially acidity water,the corrosion rate is less 0.076mm/a than the oil field criterion.更多还原