论文部分内容阅读
本文合成了抑制H_2S腐蚀的咪唑啉类缓蚀剂,并研究了它们的性能。正交试验表明,最佳合成条件是:反应温度:190～200℃;酸∶胺(mol比)=1∶1.05;反应时间以3～5小时为宜。根据以上条件合成的缓蚀剂,在含有3200mg/lH_2S的泥浆中,用量为0.2%时,抑制效果能达到80～90%,与碱式碳酸锌复配使用时,能提高缓蚀效率和降低碱式碳酸锌的用量,并发现缓蚀剂与CaO之间具有明显的协同效应。泥浆流变性能试验表明,缓蚀剂能提高泥浆的动切力和动塑比,对失水量影响不大。此外,利用X-射线衍射试验证明:(1)低碳钢在含H_2S的泥浆中,腐蚀产物的主要组成为Fe_9S_6;(2)H_2S会破坏FCLS的稳定性,分解出Fe~(2+),与H_2S反应生成面心立方的Fe_2S_4。
In this paper, imidazoline corrosion inhibitors that inhibit H 2 S corrosion were synthesized and their properties were studied. The results of orthogonal test showed that the optimal reaction conditions were: reaction temperature: 190 ~ 200 ℃; acid: amine ratio = 1: 1.05; reaction time was 3 ~ 5 hours. According to the above conditions, the corrosion inhibitor synthesized in the slurry containing 3200mg / l H 2 S, the inhibition effect can reach 80-90% when the dosage is 0.2%. When used in combination with basic zinc carbonate, the corrosion inhibition efficiency and decrease The amount of basic zinc carbonate, and found a significant synergistic effect between the corrosion inhibitor and CaO. The results of mud rheological tests show that the corrosion inhibitor can increase the dynamic shear strength and the plastic ratio of the mud and has little effect on the water loss. In addition, the X-ray diffraction tests prove that: (1) The main composition of corrosion products in mild steel containing H 2 S is Fe_9S_6; (2) H_2S destroys the stability of FCLS and decomposes Fe 2+, , And reacted with H_2S to generate face-centered cubic Fe_2S_4.