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油井井下连续滴加缓蚀剂技术 总被引:1,自引:0,他引:1
针对中国石油天然气股份公司长庆油田分公司长期以来油水井内腐蚀严重问题, 并根据陇东老区部分油水井内以CO2和硫酸盐还原菌腐蚀、靖东以H2S腐蚀为主的特点, 评价、筛选出了抗CO2和H2S腐蚀的缓蚀剂.采用的缓蚀剂井下滴加装置能够实现药液的长期、稳定连续加药, 可稳定控制产出液介质中的缓蚀剂浓度, 实现最佳加药效果, 加药周期在8个月以上.通过陇东和靖东各5口井的现场试验, 缓蚀率最高达到96%, 挂片表面光亮无点蚀, 有效抑制了油井内腐蚀. 相似文献
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LH油田储层污染严重,采用酸化解堵以恢复储层渗透率,为减缓酸化酸液对井下管柱及工具的腐蚀,开展了对酸液12%HCl+15%改性硅酸的缓蚀研究.通过不同温度条件下的静态失重腐蚀,实验对市售的四种不同类型缓蚀剂(季铵盐类缓蚀剂FSH、曼尼希碱类缓蚀剂FRC、席夫碱类缓蚀剂YC-1#以及咪唑啉类缓蚀剂YC-2#)进行了缓蚀性... 相似文献
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介绍了碳钢、不锈钢、铝、铜、钛等金属及其合金在不同浓度的磷酸溶液中及不同的温度条件下的腐蚀特性和各种缓蚀剂的缓蚀效果。并简要地叙述了磷酸缓蚀剂的发展趋势。 相似文献
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加工高硫高酸原油的高温防腐技术综述 总被引:1,自引:0,他引:1
针对高硫高酸原油加工带来的腐蚀问题,综合分析了高温硫和环烷酸的腐蚀机理,并对几种防腐措施进行了对比分析,提出抑制环烷酸腐蚀是高温防腐的根本,而采用注加高温缓蚀剂是一种经济可行的有效手段.通过比较国内外不同类型的高温缓蚀剂,提出了咪唑啉型高温缓蚀剂研发的主要影响因素,并对缓蚀剂的注入方式提出了几点建议. 相似文献
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针对化工设备腐蚀严重的问题,研制了新型缓蚀剂A-C。与传统缓蚀剂相比,新型缓蚀剂A-C能够使化工设备的腐蚀速率降低42.97%。缓蚀剂A-C的最佳质量浓度为150mg/L,其性能随温度和压力的上升而逐渐变差。现场应用结果表明:缓蚀剂A-C对化工设备的缓蚀效果明显,能够有效地保护化工设备。 相似文献
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简要地了不锈钢在不同浓度的硝酸及氢氟酸溶液中的腐蚀及缓蚀剂。喹啉衍生物在硝酸溶液中,某些含氮、含硫的有机化合及炔系衍生物在氢氟酸溶液中,可作为不锈钢的有效缓蚀剂。 相似文献
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采用旋转挂片腐蚀法,考察了常压塔顶酸性水的p H值、Cl-浓度以及缓蚀剂对腐蚀速率的影响,结合扫描电镜(SEM)、能谱仪(EDS)对挂片的形貌进行研究。结果表明:pH值在2~3时,20#碳钢腐蚀严重;p H值大于4时,20#碳钢的腐蚀速率趋于稳定;最佳缓蚀剂浓度为9 mg/L。添加缓蚀剂前后的扫面电镜(SEM)和能谱仪(EDS)分析显示,未添加缓蚀剂时,20#碳钢发生均匀腐蚀与点蚀,20#碳钢的腐蚀产物主要是Fe的氧化物,缓蚀剂有效的抑制了冷凝水中Cl-与金属结合,缓解了20#碳钢的腐蚀速率。 相似文献
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咪唑啉季铵盐缓蚀剂的制备及其性能研究 总被引:2,自引:0,他引:2
采用苯甲酸、三乙烯四胺为原料合成咪唑啉母体,用1-氯-3-苯基丙烷对其进行改性来制备咪唑啉季铵盐缓蚀剂。针对国内某含CO2油田的开发状况,动态失重法研究了咪唑啉季铵盐在6MPa下模拟油田水介质中对L80钢在不同缓蚀剂浓度、不同温度和不同时间下的缓蚀性能。结果表明:在试验条件下,随着温度的升高,缓蚀效率有明显的下降,到90℃时变化趋于平缓;在腐蚀反应初期,腐蚀速率很高,但随着腐蚀时间的延长,腐蚀速率明显下降,在较长的一段时间之后,缓蚀效率就几乎不再下降,而是稳定在一个较小的范围之内,所合成的缓蚀剂达到了预期的结果。 相似文献
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Application of the electrochemical quartz crystal microbalance (EQCM) to the study of metal corrosion and its inhibition is rather recent. Among the advantages of this technique are its very high sensitivity and the possibility of simultaneous mass variations and voltammogram recording. These characteristics suggest the use of the EQCM for research in very low corrosion rate conditions. This paper reports the results of EQCM measurements on the corrosion inhibition rates of Ni in 0.1m HClO4, in the absence and presence of different inhibitors in free corrosion conditions, for following inhibitors: acridine (A), benzyl quinolinium chloride (BQCl), dodecyl quinolinium bromide (DDQBr), tributylbenzyl ammonium iodide (TBNI) and potassium iodide (KI). The corrosion rate was reduced considerably by KI and TBNI. DDQBr showed a good inhibitive efficiency, while BQCl had only a small effect, and A stimulated corrosion of the Ni. Voltammograms at different scanning rates and the mass variation in the same solutions were recorded. Comparison of the current density and the mass changes provided the basis for a qualitative interpretation of the passivation of Ni and the mechanism of action of the different inhibitors. 相似文献
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Application of the electrochemical quartz crystal microbalance (EQCM) to the study of metal corrosion and its inhibition is rather recent. Among the advantages of this technique are its very high sensitivity and the possibility of simultaneous mass variations and voltammogram recording. These characteristics suggest the use of the EQCM for research in very low corrosion rate conditions. This paper reports the results of EQCM measurements on the corrosion inhibition rates of Ni in 0.1m HClO4, in the absence and presence of different inhibitors in free corrosion conditions, for following inhibitors: acridine (A), benzyl quinolinium chloride (BQCl), dodecyl quinolinium bromide (DDQBr), tributylbenzyl ammonium iodide (TBNI) and potassium iodide (KI). The corrosion rate was reduced considerably by KI and TBNI. DDQBr showed a good inhibitive efficiency, while BQCl had only a small effect, and A stimulated corrosion of the Ni. Voltammograms at different scanning rates and the mass variation in the same solutions were recorded. Comparison of the current density and the mass changes provided the basis for a qualitative interpretation of the passivation of Ni and the mechanism of action of the different inhibitors. 相似文献
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The corrosion and passivation behaviors of alloys with different Cu–Ni ratios were investigated in acidic sulfate solutions. The corrosion rate was calculated and the corrosion inhibition process was investigated using different amino acids as corrosion inhibitors. For these investigations conventional electrochemical techniques and electrochemical impedance spectroscopy (EIS) were used. Fitting of the experimental impedance data to theoretical values enables understanding of the corrosion inhibition mechanism and the suggestion of a suitable electrical model to explain the behavior of the alloys under different conditions. The investigation of the electrochemical behavior of alloys before and after the corrosion inhibition processes has shown that some amino acids like lysine have promising corrosion inhibition efficiency at very low concentrations. A model for the electrode/electrolyte interface during the corrosion inhibition processes was suggested and the validity of the model for the explanation of the corrosion inhibition phenomena was discussed. 相似文献
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以聚天冬氨酸、聚环氧琥珀酸、葡萄糖酸钠以及增效剂为原料,制备了一种新型的缓蚀阻垢剂。采用挂片腐蚀和静态阻垢实验,研究了其缓蚀和阻垢性能,结果表明,该缓蚀阻垢剂的质量浓度为100 mg/L时,缓蚀率可达89.04%,具有良好的缓蚀性能,其阻垢效果均明显优于油田常用缓蚀阻垢剂。 相似文献
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添加有机缓蚀剂可以减缓或防止铝合金在3.5%NaCl溶液中的腐蚀。用失重法和电化学法分别研究了7种有机化合物对7075铝合金在3.5%NaCl溶液中的缓蚀行为,并用扫描电子显微镜(SEM)对铝合金样品在不同缓蚀介质中的腐蚀形貌进行了观测。失重法实验结果和Tafel极化测试结果均表明,这些有机化合物对铝合金有不同程度的缓蚀作用,其中7-氮杂吲哚的缓蚀效果最好,通过对铝合金样品表面孔蚀特征及电化学测量结果的分析,确定其缓蚀机理为阳极过程控制为主的成膜缓蚀剂。 相似文献
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添加有机缓蚀剂可以减缓或防止铝合金在3.5%NaCl溶液中的腐蚀。用失重法和电化学法分别研究了7种有机化合物对7075铝合金在3.5%NaCl溶液中的缓蚀行为,并用扫描电子显微镜(SEM)对铝合金样品在不同缓蚀介质中的腐蚀形貌进行了观测。失重法实验结果和Tafel极化测试结果均表明,这些有机化合物对铝合金有不同程度的缓蚀作用,其中7-氮杂吲哚的缓蚀效果最好,通过对铝合金样品表面孔蚀特征及电化学测量结果的分析,确定其缓蚀机理为阳极过程控制为主的成膜缓蚀剂。 相似文献
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以2-丙烯酰胺基-2-甲基丙磺酸(AMPS)、缓蚀剂A、锌盐、抗坏血酸为原料进行复配,开发出一种复合型无磷缓蚀阻垢剂。通过静态阻垢实验、旋转挂片腐蚀实验、动电位电化学测试实验对配方进行筛选和测定。结果表明在各组分质量比为:2-丙烯酰胺基-2-甲基丙磺酸(AMPS):苯并三氮唑:锌盐:缓蚀剂A=5:0.3:1.2:4,复合型无磷缓蚀阻垢剂质量浓度为40mg/L时,缓蚀率达到92.89%,阻垢率达到95.12%。通过与传统含磷配方对比,该复合型无磷缓蚀阻垢剂与传统含磷配方缓蚀率相当,阻垢率提高1.91%,成本降低16.67%。由于该配方无磷,不会造成环境富营养化,具有明显环境与经济效益。 相似文献