Development of Novel Acidizing Inhibitors for Carbon Steel Corrosion in 15% Boiling Hydrochloric Acid
Development of Novel Acidizing Inhibitors for Carbon Steel Corrosion in 15% Boiling Hydrochloric Acid
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DOI：
10.5006/1.3278490
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发表时间：
2008-06
期刊：
影响因子：
1.6
通讯作者：
A. Priya;V. Muralidharan;A. Subramania
中科院分区：
文献类型：
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作者：
A. Priya;V. Muralidharan;A. Subramania
摘要 采用非电化学和电化学技术研究了1-肉桂基-3-硫代碳酰肼（CTCH）和1,1'-二肉桂基-3-硫代碳酰肼（DCTCH）对碳钢在15%盐酸（HCl）中的缓蚀作用。动电位极化研究表明，这些化合物是混合型抑制剂，在抑制剂浓度为 1,500 ppm 时表现出超过 97% 的抑制效率。在 30°C 至 110°C 的温度范围内，研究了温度对碳钢在含有 1,500 ppm 抑制剂的 15% HCl 中的腐蚀行为的影响。表面覆盖度 (θ) 随抑制剂浓度的对数线性增加，符合 Temkin 吸附等温线。还计算了吸附自由能、活化能、焓、熵和吸附热等热力学参数。抑制剂有效降低了钢表面的氢渗透电流。保护膜用于...
Abstract The inhibitive action of 1-cinnamylidine-3-thiocarbohydrazide (CTCH) and 1,1′-dicinnamylidine-3-thiocarbohydrazide (DCTCH) against the corrosion of carbon steel in 15% hydrochloric acid (HCl) was investigated using nonelectrochemical and electrochemical techniques. Potentiodynamic polarization studies revealed that the compounds were mixed-type inhibitors and exhibited more than 97% inhibition efficiency at 1,500 ppm of inhibitor concentration. The effect of temperature on the corrosion behavior of carbon steel in 15% HCl with 1,500 ppm of inhibitors was studied in the temperature range from 30°C to 110°C. The surface coverage (θ) increased linearly with the logarithm of the inhibitor concentration fitting a Temkin adsorption isotherm. Thermodynamic parameters including the free energy of adsorption, activation energy, enthalpy, entropy, and heat of adsorption were also calculated. The inhibitors reduced the hydrogen permeation current effectively through the steel surface. The protective film fo...