Optimizing of Corrosion Inhibitor for Coal-Based Ethanol Gasoline and Its Corrosion Inhibition
摘 要
针对煤基乙醇汽油对汽油油路系统的腐蚀问题,采用正交试验得到优化的煤基乙醇汽油缓蚀剂配方Inh-CEG,参照GB 5096-2017标准中6.1.3的方法和火焰原子吸收光度法,评价了其对铜片的缓蚀效果;采用等温吸附模型及电化学极化曲线研究了Inh-CEG的吸附机理及缓蚀机理。结果表明:缓蚀剂Inh-CEG在煤基乙醇强化腐蚀介质体系和煤基乙醇汽油强化腐蚀介质体系中对铜片的缓蚀率均达到85%以上,且添加Inh-CEG的煤基乙醇汽油强化腐蚀介质体系中的铜含量远远低于生物质乙醇汽油体系中的铜含量,说明该缓蚀剂具有良好的缓蚀效果;在等温等压条件下,Inh-CEG分子能自发地吸附在铜表面形成单分子吸附,而且Inh-CEG分子在铜片表面的吸附符合Langmuir吸附模型,是物理吸附和化学吸附共同作用的结果;在煤基乙醇汽油强化腐蚀介质体系中,Inh-CEG属阴极型缓蚀剂。
Abstract
In view of corrosion problem of coal-based ethanol gasoline to automobile oil system, the optimized formulation of coal-based ethanol gasoline inhibitor Inh-CEG was obtained by orthogonal test. The corrosion inhibition effect of the inhibitor to copper was evaluated referring to the method in 6.1.3 of GB 5096-2017 and flame atomic absorption spectrophotometry. The adsorption mechanism and inhibition mechanism of Inh-CEG were studied by isothermal adsorption model and electrochemical polarization curve. The results show that the inhibition efficiency of Inh-CEG in coal-based ethanol enhanced corrosion medium system and coal-based ethanol gasoline enhanced corrosion medium system was more than 85%, and the copper content in the coal-based ethanol gasoline enhanced corrosion medium system added with Inh-CEG was much lower than that in biomass ethanol gasoline system, which indicated that the inhibitor had a good corrosion inhibition effect. Under the isothermal and isobaric conditions, Inh-CEG molecules could spontaneously adsorb on copper surface to form monolayer adsorption, and the adsorption of Inh-CEG molecules on copper surface conformed to Langmuir adsorption model, which was the result of physical adsorption and chemical adsorption. Inh-CEG was a cathodic corrosion inhibitor in coal-based ethanol gasoline enhanced corrosion medium system.
中图分类号 TG174 DOI 10.11973/fsyfh-201910009
所属栏目 缓蚀剂
基金项目 延长石油集团项目(ycsy2017ky-A-45-1)
收稿日期 2018/6/22
修改稿日期
网络出版日期
作者单位点击查看
引用该论文: LI Junhua,LI Junli,ZHANG Ying,CHENG Wen,LI Yile,REN Haijing. Optimizing of Corrosion Inhibitor for Coal-Based Ethanol Gasoline and Its Corrosion Inhibition[J]. Corrosion & Protection, 2019, 40(10): 758
共有人对该论文发表了看法,其中:
人认为该论文很差
人认为该论文较差
人认为该论文一般
人认为该论文较好
人认为该论文很好
参考文献
【1】周桂梅. 乙醇汽油的运用[J]. 江苏科技信息, 2006(8):50-52.
【2】WEIDIG C F. Gasohol having corrosion inhibiting properties:US4440545[P]. 1984-04-03.
【3】崔君利. 乙醇汽油抗腐蚀抑制剂及其制备方法:CN01133496.7[P]. 2002-02-17.
【4】龚冬梅, 张翠君, 张戟, 等. 车用乙醇汽油分层问题的研究[J]. 河南化工, 2003, 20(6):11-13.
【5】张永光. 乙醇作为车用燃料的可行性及发展趋势[J]. 石油商技, 2001, 19(5):16-19.
【6】王宗廷, 张云山, 崔新栋. 车用乙醇汽油金属腐蚀抑制剂的研究[J]. 汽车工艺与材料, 2006(10):23-26.
【7】佟金萍. 燃料乙醇中金属腐蚀抑制剂添加量的试验方法[J]. 军民两用技术与产品, 2014(7):246-247.
【8】HONG H G, PARK W. A study of adsorption kinetics and thermodynamics of ω-mercaptoalkylhydroquinone self-assembled monolayer on a gold electrode[J]. Electrochimica Acta, 2005, 51(4):579-587.
【9】BOUKLAH M, HAMMOUTI B, LAGRENÉE M, et al. Thermodynamic properties of 2, 5-bis(4-methoxyphenyl)-1, 3, 4-oxadiazole as a corrosion inhibitor for mild steel in normal sulfuric acid medium[J]. Corrosion Science, 2006, 48(9):2831-2842.
【10】VILLAMIL R F V, CORIO P, RUBIM J C, et al. Sodium dodecylsulfate-benzotriazole synergistic effect as an inhibitor of processes on copper/chloridric acid interfaces[J]. Journal of Electroanalytical Chemistry, 2002, 535(1/2):75-83.
【2】WEIDIG C F. Gasohol having corrosion inhibiting properties:US4440545[P]. 1984-04-03.
【3】崔君利. 乙醇汽油抗腐蚀抑制剂及其制备方法:CN01133496.7[P]. 2002-02-17.
【4】龚冬梅, 张翠君, 张戟, 等. 车用乙醇汽油分层问题的研究[J]. 河南化工, 2003, 20(6):11-13.
【5】张永光. 乙醇作为车用燃料的可行性及发展趋势[J]. 石油商技, 2001, 19(5):16-19.
【6】王宗廷, 张云山, 崔新栋. 车用乙醇汽油金属腐蚀抑制剂的研究[J]. 汽车工艺与材料, 2006(10):23-26.
【7】佟金萍. 燃料乙醇中金属腐蚀抑制剂添加量的试验方法[J]. 军民两用技术与产品, 2014(7):246-247.
【8】HONG H G, PARK W. A study of adsorption kinetics and thermodynamics of ω-mercaptoalkylhydroquinone self-assembled monolayer on a gold electrode[J]. Electrochimica Acta, 2005, 51(4):579-587.
【9】BOUKLAH M, HAMMOUTI B, LAGRENÉE M, et al. Thermodynamic properties of 2, 5-bis(4-methoxyphenyl)-1, 3, 4-oxadiazole as a corrosion inhibitor for mild steel in normal sulfuric acid medium[J]. Corrosion Science, 2006, 48(9):2831-2842.
【10】VILLAMIL R F V, CORIO P, RUBIM J C, et al. Sodium dodecylsulfate-benzotriazole synergistic effect as an inhibitor of processes on copper/chloridric acid interfaces[J]. Journal of Electroanalytical Chemistry, 2002, 535(1/2):75-83.
相关信息