曾凌三
,
梁本熹
,
张跃龙
,
唐辉尧
中国腐蚀与防护学报
采用电化学和失重法研究N-烷基月桂酰胺(NALA)对硫酸溶液中碳钢腐蚀的缓蚀行为和吸附规律。实验表明,其缓蚀性能优良,主要属以阻滞阳极过程为主的缓蚀剂,吸附过程为放热反应,属化学吸附,在不同吸附阶段分别遵循Temkin和Frumkin吸附等温式。
关键词:
表面活性剂
,
Corrosion inhibitor
,
Lauryl amide
M. Shyamala
材料科学技术（英文）
Due to ease of application, cost effectiveness and environmentally safe, in this study, the corrosion inhibition effect of aqueous extract of Eclipta alba in 1 N hydrochloric acid has been investigated by weight loss, potentiodynamic polarization and impedance methods and the extracts of Eclipta alba were found to be effective corrosion pickling inhibitor. The effect of immersion time and temperature revealed that the extracts of Eclipta alba with an optimum concentration of 8.0% v/v showed maximum inhibition efficiency of 99.6% at 3 h immersion time and 30°C. Arrhenius plots for mild steel immersed in 1 N HCl solution in the absence and presence of optimum concentration (8.0% in v/v) of Eclipta alba extract showed the effect of temperature. Polarization studies indicate that this plant extract acts as a mixed type inhibitor. The adsorption of
Eclipta alba follows Langmuir adsorption isotherm. The inhibition action may be due to the presence of the Wedelactone and also the alkaloid Ecliptine present in the leaves of Eclipta alba.
关键词:
Eclipta alba
,
null
,
null
,
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