本文選題：CO2腐蝕 + 緩蝕劑　； 參考：《延安大學(xué)》2015年碩士論文

【摘要】：在油氣管道運(yùn)輸過程中,管道腐蝕老化問題不僅對(duì)管道的運(yùn)輸會(huì)帶來嚴(yán)重的經(jīng)濟(jì)損失,還會(huì)造成人員傷亡。因此,在油氣管道運(yùn)輸中,做好管道防腐是一項(xiàng)重要的工作。目前,有復(fù)合管、碳鋼+緩蝕劑、防腐涂層、襯塑等防腐技術(shù),但是,由于復(fù)合管、襯塑等技術(shù)成本較高,因此,緩蝕劑防腐就逐漸成為普遍采用的防腐技術(shù)。緩蝕劑防腐是通過向油氣管道中添加緩蝕劑,進(jìn)而減弱管道的腐蝕速率來達(dá)到減緩油氣管道腐蝕的目的。按照延安地區(qū)油氣管道內(nèi)積水水質(zhì),以二氧化碳為腐蝕因素,配制了模擬腐蝕溶液。采用咪唑?yàn)橹鲃?以甲基丁炔醇、表面活性劑為輔劑,制備了不同種類的復(fù)配緩蝕劑。利用失重法和SEM手段分析了復(fù)配緩蝕劑對(duì)N80鋼和A3鋼的緩蝕效果。以咪唑?yàn)橹鲃?甲基丁炔醇為輔劑,通過改變咪唑和甲基丁炔醇的體積比,制備了系列復(fù)配緩蝕劑,研究復(fù)配緩蝕劑對(duì)N80鋼、A3鋼的緩蝕效果。結(jié)果表明,制備的系列復(fù)配緩蝕劑對(duì)N80鋼緩蝕率均可達(dá)到74%以上,對(duì)A3鋼的緩蝕率均可達(dá)到87%以上。當(dāng)咪唑(wt%=0.8%)和甲基丁炔醇的體積比為100:10時(shí)復(fù)配的緩蝕劑對(duì)N80鋼、A3鋼的緩蝕效果最明顯,對(duì)N80鋼的緩蝕率為88%,而對(duì)A3鋼的緩蝕率都可達(dá)到94%。同時(shí)研究了添加最優(yōu)復(fù)配緩蝕劑前后N80鋼、A3鋼的表面微觀結(jié)構(gòu),結(jié)果表明,在未加入緩蝕劑的情況下,該鋼片表面腐蝕嚴(yán)重,屬于均勻腐蝕,表面有明顯的裂紋,添加了復(fù)配緩蝕劑后,N80鋼和A3鋼表面腐蝕得到了較好的抑制,裂紋明顯降低。說明復(fù)配緩蝕劑對(duì)兩種鋼片都起到了緩蝕作用,且復(fù)配好的緩蝕劑之間表現(xiàn)出較好的協(xié)同作用。通過改變咪唑和1-氯代十二烷的體積比,制備了系列復(fù)配緩蝕劑,研究復(fù)配緩蝕劑對(duì)N80鋼、A3鋼的緩蝕效果。結(jié)果表明,制備的系列復(fù)配緩蝕劑對(duì)N80鋼的緩蝕率均可達(dá)到68.9%以上,對(duì)A3鋼的緩蝕率均可達(dá)到84.5%以上。當(dāng)咪唑(wt%=0.8%)和1-氯代十二烷的體積比為100:20時(shí)復(fù)配的緩蝕劑對(duì)N80鋼、A3鋼的緩蝕效果最明顯,對(duì)N80鋼的緩蝕率為81.1%,而對(duì)A3鋼的緩蝕率都可達(dá)到92.2%。同時(shí)SEM結(jié)果表明,添加了最優(yōu)復(fù)配緩蝕劑后,N80鋼和A3鋼表面腐蝕得到了較好的抑制,裂紋明顯降低,說明復(fù)配緩蝕劑對(duì)兩種鋼片都起到了緩蝕作用,且復(fù)配好的緩蝕劑之間表現(xiàn)出較好的協(xié)同作用。
[Abstract]:In the process of oil and gas pipeline transportation, pipeline corrosion aging will not only bring serious economic loss to pipeline transportation, but also cause casualties. Therefore, it is an important work to do pipeline anticorrosion well in oil and gas pipeline transportation. At present, there are many anticorrosive technologies such as composite pipe, carbon steel corrosion inhibitor, anticorrosive coating, plastic lining, etc. However, due to the high cost of composite pipe and plastic lining technology, corrosion inhibitor anticorrosion has gradually become a popular anticorrosive technology. Corrosion inhibitor anticorrosion is to reduce the corrosion rate of oil and gas pipeline by adding corrosion inhibitor to oil and gas pipeline. According to the water quality of oil and gas pipeline in Yan'an area, simulated corrosion solution was prepared with carbon dioxide as corrosion factor. Different kinds of complex corrosion inhibitors were prepared by using imidazole as main agent, methyl buynyl alcohol and surfactant as adjuvant. The corrosion inhibition effect of composite corrosion inhibitor on N80 steel and A3 steel was analyzed by weight loss method and SEM method. A series of complex corrosion inhibitors were prepared by changing the volume ratio of imidazole and methyl buynyl alcohol with imidazole as the main agent and methyl buynyl alcohol as the auxiliary agent. The corrosion inhibition effect of the complex inhibitor on N80 steel was studied. The results show that the corrosion inhibition rate of N80 steel and A3 steel can be over 74% and 87% respectively. When the volume ratio of imidazolium and methyl buynyl alcohol is 100: 10, the inhibition effect of the complex inhibitor on N80 steel is the most obvious, the inhibition rate for N80 steel is 88% and the inhibition rate for A3 steel is up to 94 pieces. At the same time, the surface microstructure of N80 steel and A3 steel before and after the addition of the optimum corrosion inhibitor was studied. The results show that the surface corrosion of the steel sheet is serious, it belongs to uniform corrosion, and there are obvious cracks on the surface without the addition of corrosion inhibitor. The surface corrosion of N80 steel and A3 steel was well inhibited and the crack was obviously reduced with the addition of complex corrosion inhibitor. The results show that the composite corrosion inhibitor can inhibit the corrosion of the two steel sheets, and the synergistic effect between the two kinds of corrosion inhibitors is good. A series of complex corrosion inhibitors were prepared by changing the volume ratio of imidazole and 1-chloro dodecane. The corrosion inhibition effect of the complex inhibitor on N80 steel was studied. The results showed that the corrosion inhibition rate of N80 steel and A3 steel were above 68.9% and 84.5% respectively. When the volume ratio of 1-chloro-dodecane is 100: 20, the corrosion inhibitor is the most effective inhibitor on N80 steel, the inhibition rate is 81.1% for N80 steel and 92.22% for A3 steel. At the same time, the SEM results showed that the surface corrosion of N80 steel and A3 steel was inhibited and the crack was obviously reduced with the addition of optimum corrosion inhibitor, which indicated that the corrosion inhibitor could inhibit the corrosion of both steels. And the complex corrosion inhibitor showed good synergistic effect.
【學(xué)位授予單位】：延安大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TG174.42

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本文編號(hào)：1920408