本文選題：N80鋼 + 雙季銨鹽　； 參考：《中國石油大學(xué)(華東)》2015年碩士論文

【摘要】：油藏改造領(lǐng)域現(xiàn)今使用的大部分高溫酸化緩蝕劑存在溶解性差、易結(jié)焦等缺點,而且常用的復(fù)合型高溫酸化緩蝕劑主要是炔醇類緩蝕劑,炔醇類物質(zhì)雖然大大提高了產(chǎn)品的抗腐蝕性能,但具有價格昂貴,劇毒等缺點。所以研究具有溶解性好、吸附中心較多、毒性小等優(yōu)點的緩蝕劑具有非常廣闊的應(yīng)用前景。雙季銨鹽因具有以上優(yōu)點而成為近年來防腐領(lǐng)域的研究熱點。本文以喹啉、吡啶、α-甲基吡啶為原料,分別與雙鹵代烴1,4-二溴丁烷、1,6-二溴己烷以及1,8-二溴辛烷經(jīng)季銨化反應(yīng)制得九種對稱型雙季銨鹽。利用核磁共振譜、紅外光譜等測試方法對其分子結(jié)構(gòu)進行表征。并采用靜態(tài)腐蝕實驗對所制備的九種產(chǎn)品在15%HCl溶液中對N80鋼的緩蝕能力進行測試。實驗結(jié)果顯示,喹啉系列的雙季銨鹽產(chǎn)品緩蝕性能明顯優(yōu)于吡啶系列及α-甲基吡啶系列產(chǎn)品。且對于同一系列產(chǎn)品而言,隨疏水鏈長度的增加,緩蝕劑對鋼片的保護作用逐步增強。溴化1,8-二喹啉辛烷的緩蝕效果最佳。為進一步提高緩蝕性能,選取溴化1,8-二喹啉辛烷(Q-8-Q)與肉桂醛(CA)進行復(fù)配。由復(fù)配優(yōu)化試驗得出最佳復(fù)配比從而制備了復(fù)配緩蝕劑QC-8。通過常壓靜態(tài)腐蝕實驗、電化學(xué)測試、表面形貌分析等手段評價了QC-8在15%HCl中對N80鋼片的緩蝕性能。同時考察了QC-8濃度及腐蝕溫度等因素對緩蝕性能的影響。電化學(xué)測試表明,復(fù)配緩蝕劑QC-8是一種以抑制陰極反應(yīng)為主的混合型緩蝕劑,能夠在金屬表面吸附形成穩(wěn)定的保護膜來減緩腐蝕反應(yīng)。復(fù)配緩蝕劑QC-8濃度為5×10-3M時,在90℃、15%HCl中浸泡4 h后,對N80鋼的緩蝕率能夠達(dá)到99.5%,說明QC-8在酸性介質(zhì)中對金屬具有優(yōu)良的緩蝕性能。羥基是有效的吸附中心,對緩蝕劑的緩蝕能力具有很好的促進作用。本文主要合成了三種含羥基雙季銨鹽:氯化1,3-二吡啶丙醇、氯化1,3-二(α-甲基吡啶)丙醇、氯化1,3-二喹啉丙醇,并用紅外和核磁共振分析方法對其結(jié)構(gòu)進行表征。考察了各因素對緩蝕能力的影響。實驗證明羥基的存在很大程度上提高了緩蝕劑的緩蝕性能。所制備的含羥基雙季銨鹽屬于混合型的有機緩蝕劑,通過在金屬表面吸附生成的保護膜來減緩腐蝕反應(yīng)。且在金屬表面的吸附行為符合Langmuir吸附模型,包括物理吸附和化學(xué)吸附兩種類型。
[Abstract]:Most of the high temperature acidizing inhibitors used in the field of reservoir reconstruction have the disadvantages of poor solubility and easy coking, and the common complex high temperature acidizing inhibitors are mainly acetylene alcohols. Although alkynyl alcohols greatly improve the corrosion resistance of the products, they have the disadvantages of high price and high toxicity. Therefore, the study of corrosion inhibitors with good solubility, more adsorption centers, less toxicity and other advantages has a very broad application prospects. Bisquaternary ammonium salt has become a research hotspot in the field of anticorrosion in recent years because of its advantages. Nine symmetrical bis-quaternary ammonium salts were prepared by quaternary ammonium reaction of quinoline, pyridine and 偽 -methylpyridine with dihalogenated hydrocarbon (1) 4-dibromobutane (1), dibromohexane (1), and dibromooctane (1) by quaternization. The molecular structure was characterized by NMR and IR spectra. The corrosion inhibition ability of N80 steel in 15HCl solution was tested by static corrosion test. The results show that the corrosion inhibition performance of quaternary ammonium salt of quinoline series is better than that of pyridine series and 偽 -methylpyridine series. For the same series of products, with the increase of hydrophobic chain length, the protective effect of corrosion inhibitor on steel sheet is gradually enhanced. The best corrosion inhibition effect was obtained with 1 + 8-diquinoline octane bromide. In order to further improve the corrosion inhibition performance, a mixture of 1 ~ (8) -diquinoline-octane bromide (Q-8-Q) and cinnamaldehyde (CA) was selected. The optimum ratio of complex corrosion inhibitor QC-8 was obtained from the optimization test. The corrosion inhibition of QC-8 on N80 steel sheet in 15HCl was evaluated by static corrosion test, electrochemical test and surface morphology analysis. The effects of QC-8 concentration and corrosion temperature on the corrosion inhibition were also investigated. Electrochemical tests show that the complex inhibitor QC-8 is a mixed corrosion inhibitor which mainly inhibits cathodic reaction and can form a stable protective film on the metal surface to slow down the corrosion reaction. When the concentration of complex inhibitor QC-8 is 5 脳 10 ~ (-3) M, after immersion in HCl at 90 鈩，

本文編號：2066160