Corrosion Inhibition of Carbon Steel in Acidic Environment by Imidazolium Ionic Liquids Containing Vinyl-Hexafluorophosphate as Anion

被引：0

作者：

Likhanova, Natalya V. ^{[1
]}

Olivares-Xometl, Octavio ^{[2
]}

Guzman-Lucero, Diego ^{[1
]}

Dominguez-Aguilar, Marco A. ^{[1
]}

Nava, Noel ^{[1
]}

Corrales-Luna, Monica ^{[2
]}

Consuelo Mendoza, M. ^{[2
]}

机构：

[1] Inst Mexicano Petr, Programa Invest & Posgrad, Mexico City 07730, DF, Mexico

[2] Benemerita Univ Autonoma Puebla, Fac Ingn Quim, Puebla 72570, Mexico

来源：

INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE | 2011年 / 6卷 / 10期

关键词：

vinylimidazolium; hexfluorophosphate; ionic liquid; inhibitor efficiency; carbon steel; acidic medium; Mossbauer spectroscopy; MILD-STEEL; ADSORPTION; SURFACE; IRON;

D O I：

暂无

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Five imidazolium-type ionic liquids, containing both N1-unsatured chain and N3-long alkyl saturated chain as cations and hexafluorophosphate as anion (VImC(x)PF(6), x=4, 8, 12, 18 and 22), were evaluated as corrosion inhibitors for carbon steel SAE 1018 in 1.0 M H2SO4 solution. The compounds presented relatively high inhibition efficiencies (similar to 81-96%) at 100 ppm as confirmed by weight loss tests and polarization curves. Synthesized inhibitors obeyed Langmuir adsorption and behaved as mixed type inhibitors, displaying physical and chemical adsorption depending on the length of the carbon chain link to N3. Mossbauer analysis of corrosion products mainly determined the presence szomolnokite (FeSO4 H2O), whose content increased with aliphatic chain length suggesting that corrosion inhibition occurred by iron sulfate formation. The most effective compound (VImC(12)PF(6)) was the only that displayed the presence of alpha iron, iron hydroxide and rozenite (FeSO4 4H(2)O) as corrosion products.

引用

页码：4514 / 4536

页数：23

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