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首页> 外文期刊>International Journal of Electrochemical Science >Corrosion Protection of Mild Steel by the Synergetic effect of Sodium Dodecylbenzenesulfonates and Zinc Sulfate in Sodium Chloride Solution
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Corrosion Protection of Mild Steel by the Synergetic effect of Sodium Dodecylbenzenesulfonates and Zinc Sulfate in Sodium Chloride Solution

机译：十二烷基苯磺酸钠和硫酸锌在氯化钠溶液中的协同作用对低碳钢的腐蚀防护

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摘要

The corrosion inhibition of sodium dodecylbenzenesulfonates surfactant (SDBS) and SDBSincorporated with various concentrations of zinc sulfate (ZnSO 4 ) on mild steel, in 0.05 M NaCl at 25 o Cwere investigated using the electrochemical impedance spectroscopy (EIS) and polarizationmeasurements. The adsorption behavior of SDBS was investigated through different adsorptionisotherms. Characterization of the organic film on mild steel surface was done through the Fouriertransform infrared spectroscopy (FTIR) analysis. The EIS results found that the corrosion inhibitionefficiency (IE) of SDBS was enhanced in the presence of ZnSO 4 , showing the maximum value of 96%at mixtures of 200:200 ppm SDBS:ZnSO 4 . The polarization measurement found that the IE for a similarsample was 95%, which agrees well with the EIS results. The calculated thermodynamic parameterreveals that the adsorption process of SDBS obeys the Langmuir adsorption isotherm with the correlationcoefficient, R 2 of 0.996. The calculated free energy of adsorption was -33 kJmol-1 which indicatedstrong adsorption of SDBS on mild steel surface both through physisorption and chemisorption. TheFTIR analysis confirmed the presence of the adsorbed organic film on the mild steel surface.
机译：使用电化学阻抗谱（EIS）和极化测量研究了十二烷基苯磺酸钠表面活性剂（SDBS）和掺入各种浓度的硫酸锌（ZnSO 4）的SDBS在0.05 M NaCl中于25 o C时对低碳钢的腐蚀抑制作用。通过不同的吸附等温线研究了SDBS的吸附行为。通过傅里叶变换红外光谱（FTIR）分析对低碳钢表面上的有机膜进行了表征。 EIS结果表明，在ZnSO 4存在下，SDBS的缓蚀效率（IE）增强，在200：200 ppm SDBS：ZnSO 4的混合物中显示96％的最大值。极化测量发现，类似样品的IE为95％，与EIS结果非常吻合。计算得到的热力学参数表明，SDBS的吸附过程符合Langmuir吸附等温线，相关系数R 2为0.996。计算得出的吸附自由能为-33 kJmol-1，这表明SDBS通过物理吸附和化学吸附均在低碳钢表面上具有较强的吸附能力。 FTIR分析证实低碳钢表面上存在吸附的有机膜。

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