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摘要:
Four protic ionic liquids(ILs)were synthesized via a one-step method by using benzotriazole(BTA)and benzimidazole as cations,and benzenesulfonic acid and 2-naphthalenesulfonic acid(NSA)as anions.These ILs were used as green corrosion inhibitors for brass specimens in a nitric acid solution.The structure of the protic ILs was characterized by 1H-NMR,13C-NMR,and FT-IR spectroscopy.The effects of the IL structure,IL concentration,acid concentration,and corrosion time on the surface morphology of brass specimens and the inhibition efficiency(η%)of ILs were investigated by the weight loss method combined with SEM and EDS spectroscopy.Polarization curves and impedance spectroscopy were used to analyze the electrochemical corrosion inhibition mechanism of ILs.Results showed that IL synthesis was a proton transfer process,and the proton of the–SO3H group on NSA was deprived by BTA.IL[BTA][NSA],which had a high charge density and large conjugateπband,was the most effective inhibitor for brass corrosion.Theη%of[BTA][NSA]decreased with the increase in acid concentration and corrosion time,which showed an increment with the increase in[BTA][NSA]concentration.The higher theη%of[BTA][NSA]is,the smoother the surface of the brass specimens is,and the smaller the undistributed area of Cu element will be.Corrosion inhibiting mechanism from electrochemical analysis indicated that the addition of[BTA][NSA]increased the polarization resistance of the brass electrode significantly and suppressed both anodic and cathodic reactions.
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篇名 Corrosion inhibiting performance and mechanism of protic ionic liquids as green brass inhibitors in nitric acid
来源期刊 绿色能源与环境:英文版 学科 工学
关键词 Protic ionic liquid Corrosion inhibitor Electrochemical mechanism BRASS
年,卷(期) 2020,(2) 所属期刊栏目
研究方向 页码范围 214-222
页数 9页 分类号 TG1
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Protic
ionic
liquid
Corrosion
inhibitor
Electrochemical
mechanism
BRASS
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研究分支
研究去脉
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期刊影响力
绿色能源与环境:英文版
季刊
2096-2797
10-1418/TK
北京
出版文献量(篇)
253
总下载数(次)
1
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