Corrosion inhibition of carbon steel in acid chloride solution using ethoxylated fatty alkyl amine surfactants

被引:34
|
作者
Migahed, MA [1 ]
Abd-El-Raouf, M
Al-Sabagh, AM
Abd-El-Bary, HM
机构
[1] EPRI, Cairo 11727, Egypt
[2] Al Azhar Univ, Cairo, Egypt
[3] Univ Sci & Technol, Dept Gen & Analyt Chem, PL-30059 Krakow, Poland
关键词
corrosion; carbon steel; non-ionic surfactants; potentiostatic polarisation; surface tension and activation energy;
D O I
10.1007/s10800-005-9094-7
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Four novel non-ionic ethoxylated fatty alkyl amine surfactants (I-IV) were synthesised and investigated as corrosion inhibitors of carbon steel in 1 M hydrochloric acid solution using gravimetric, open circuit potential and potentiostatic polarisation techniques. The percentage inhibition efficiency (eta%) for each inhibitor increased with increasing concentration until the critical micelle concentration (cmc) was reached. The maximum inhibition efficiency approached 95.1% in the presence of 400 ppm of the inhibitor (IV). It was found that the adsorption of the surfactants on carbon steel followed the Langmuir adsorption isotherm. Potentiostatic polarisation data indicated that these surfactants act as mixed type inhibitors. The values of activation energy (E-a*) of carbon steel dissolution in 1 M HCl were calculated in the absence and presence of 400 ppm of each inhibitor. Finally, scanning electron microscopy (SEM) was used to examine the surface morphology of polished carbon steel surfaces and those immersed in 1 M HCl in the absence and presence of 400 ppm of inhibitor (IV).
引用
收藏
页码:395 / 402
页数:8
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