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首页> 外文期刊>Journal of Materials Engineering and Performance >Inhibition of Mild Steel Corrosion Using L-Histidine and Synergistic Surfactants Additives
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Inhibition of Mild Steel Corrosion Using L-Histidine and Synergistic Surfactants Additives

机译：使用L-组氨酸和增效表面活性剂添加剂抑制低碳钢腐蚀

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摘要

The corrosion inhibition behavior of nitrogen-containing amino acid L-Histidine (LHS) on mild steel in 0.1 M H_2SO_4 solution in the temperature range of 30-60℃ was studied by weight loss measurements, and potentiodynamic polarization measurements. The effect of the addition of very small concentration of surfactants, sodium dodecyl sulfate (SDS), and cetyltrimethyl ammonium bromide (CTAB), respectively on the corrosion inhibition behavior of LHS was also studied. The surface morphology of the corroded steel samples was evaluated by scanning electron microscopy (SEM) and atomic force microscopy (AFM). LHS significantly reduces the corrosion rates of mild steel, with the maximum inhibition efficiency (IE) being 71.09% at 30℃ in the presence of 500 ppm of LHS. The IE of LHS is synergistically increased in the presence of SDS and CTAB. The SEM and AFM photographs show a clearly different surface morphology in the presence of additives. LHS alone and in combination with surfactants obeys Langmuir adsorption isotherm from the fit of the experimental data of all concentration and temperature studied. The calculated thermodynamic parameters for adsorption reveal strong interaction between the inhibitors and the mild steel surface, and suggest physical adsorption. The results obtained by potentiodynamic polarization measurements are consistent with the results of the weight loss measurement. LHS acts more anodic than cathodic inhibitor.
机译：通过失重法和电势极化法研究了含氮氨基酸L-组氨酸（LHS）在0.1 M H_2SO_4溶液中在30-60℃温度范围内对低碳钢的缓蚀性能。还研究了分别添加极低浓度的表面活性剂，十二烷基硫酸钠（SDS）和十六烷基三甲基溴化铵（CTAB）对LHS的缓蚀性能的影响。通过扫描电子显微镜（SEM）和原子力显微镜（AFM）评估腐蚀后的钢样品的表面形态。 LHS显着降低了低碳钢的腐蚀速率，在存在500 ppm LHS的情况下，在30℃下的最大抑制效率（IE）为71.09％。在SDS和CTAB的存在下，LHS的IE协同增加。 SEM和AFM照片显示存在添加剂时表面形态明显不同。 LHS单独使用或与表面活性剂结合使用时，根据所研究的所有浓度和温度的实验数据均符合Langmuir吸附等温线。计算得出的吸附热力学参数表明抑制剂与低碳钢表面之间有很强的相互作用，并表明存在物理吸附。通过电位动力极化测量获得的结果与重量损失测量的结果一致。 LHS比阴极抑制剂的阳极作用更大。

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