本文選題：咪唑啉　切入點：席夫堿　出處：《西南石油大學》2016年碩士論文　論文類型：學位論文

【摘要】：目前,多吸附位點緩蝕劑的研究不是很廣泛,由于多吸附位點緩蝕劑具有易吸附于金屬表面,不易脫附和緩蝕劑分子間易發(fā)生重疊現(xiàn)象的特點；而且咪唑啉類緩蝕劑、席夫堿類緩蝕劑和炔醇類緩蝕劑是常用的緩蝕劑。本文以均(間)苯酰胺基為橋梁增加緩蝕劑吸附位點為出發(fā)點,合成了三類新型的含多吸附位點的咪唑啉BTA-IM、席夫堿BTA和炔醇IAPA緩蝕劑；采用傅里葉紅外光譜、核磁共振氫譜(1H-NMR)和液相質(zhì)譜(LC-MS)表征了產(chǎn)物的分子結(jié)構(gòu),通過實驗室評價法(靜態(tài)掛片失重法、電化學阻抗測試EIS、動電位極化曲線測試、掃描電子顯微鏡分析SEM和原子力顯微鏡分析AFM)研究了本文合成的緩蝕劑對P110鋼浸泡于60℃的1mol/L鹽酸腐蝕介質(zhì)48h后的腐蝕情況的影響,結(jié)合量子化學理論計算方法分析了緩蝕劑分子結(jié)構(gòu)的全局活性與局部活性,得到研究結(jié)果,如下：(1)利用酰胺化-環(huán)化兩步法、席夫堿縮合反應、炔化法和酰胺化反應可以合成三種新型含多吸附位點的緩蝕劑(BTA-IM、BTA和IAPA)。(2)從實驗方法評價研究分析可知,本論文合成的緩蝕劑在1mol/L鹽酸介質(zhì)中均具有優(yōu)異的緩蝕性能,增加吸附位點和疏水鏈長均能有效地提升其緩蝕效率。(3)從動電位極化曲線研究分析得知,本論文合成的緩蝕劑均屬于以陽極控制為主的混合型緩蝕劑,其作用機理是有效地抑制了鋼片的陽極溶解和陰極析氫過程。(4)從吸附模型擬合研究分析得知,該三類緩蝕劑在鋼片表面的吸附模型均滿足Langmuir吸附等溫式,其吸附過程是自發(fā)進行的,吸附類型是物理-化學吸附。(5)運用量子化學理論方法分別計算了緩蝕劑分子的全局活性和局部活性：第一,吸附位點對分子的前線軌道分布和結(jié)構(gòu)特征參數(shù)均產(chǎn)生了影響；第二,緩蝕劑吸附位點的增加能有效增強分子結(jié)構(gòu)的全局活性,提高吸附能力；第三,簡縮福井函數(shù)表征了雜原子O、N有較高的局部活性,提高位點活性�？偠灾�,結(jié)合實驗室方法和理論方法評價的結(jié)果分析可得,實驗室評價結(jié)果和理論計算結(jié)果基本一致,證明了本課題研究的合理性和可行性,也驗證了實驗室評價結(jié)果的精確性。其次,增加緩蝕劑的吸附位點能有效地提高其緩蝕性能,并且增加疏水烷基長鏈能進一步增強緩蝕劑的緩蝕效果。
[Abstract]:At present, the research of multi-adsorption site corrosion inhibitor is not very extensive, because the multi-adsorption site inhibitor has the characteristic of easy to adsorb on the metal surface, not easy to desorption and easy to overlap with the inhibitor molecules, and Imidazoline corrosion inhibitor, Schiff base corrosion inhibitor and alkynyl alcohol inhibitor are common corrosion inhibitors. In this paper, isobenzamide group is used as a bridge to increase adsorption sites of corrosion inhibitor. Three new types of Imidazoline BTA-IMs, Schiff base BTA and IAPA inhibitors containing multiple adsorption sites were synthesized, and their molecular structures were characterized by Fourier transform infrared spectroscopy (FTIR), 1H-NMR1H-NMR and LC-MS. Through the laboratory evaluation method (static hanging plate weightlessness method, electrochemical impedance test EISs, potentiodynamic polarization curve test, Scanning electron microscopy (SEM) and atomic force microscopy (AFM) were used to study the effect of corrosion inhibitor on corrosion of P110 steel immersed in 1mol / L hydrochloric acid solution at 60 鈩，

本文編號：1625618