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首页> 外文期刊>Arabian Journal for Science and Engineering >EFFECT OF HALIDE IONS ADDITIVES ON THE CORROSION INHIBITION OF ALUMINUM IN HC1 BY POLYACRYLAMIDE
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EFFECT OF HALIDE IONS ADDITIVES ON THE CORROSION INHIBITION OF ALUMINUM IN HC1 BY POLYACRYLAMIDE

机译：卤离子添加剂对聚丙烯酰胺对HCl中铝的缓蚀作用

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摘要

The influence of bromide and iodide ions on the inhibitive effect of polyacrylamide (PA) on aluminum corrosion in HC1 solution was studied using weight loss, hydrogen evolution, and thermometric techniques at 30 and 60°C. The results show that the halide additives synergistically increased the inhibition efficiency of polyacrylamide. The increase in inhibition efficiency (%I) was found to be more pronounced in I'than Br' ions. The observed difference in behavior of both halide additives could be linked to the differences in their atomic radii as well as electronegativity. The values of synergism parameter (S1) obtained for the halides are greater than unity, suggesting that the improved inhibition efficiency of polyacrylamide caused by the addition of the halide ions is due to synergistic effect. Corrosion inhibition could be attributed to adsorption of inhibitor molecules on the Al surface via physical mechanism. The adsorption process followed the kinetic-thermodynamic model of El-Awady adsorption isotherm. These results were further corroborated by kinetic and thermodynamic parameters for corrosion and adsorption processes evaluated from experimental data.
机译：使用失重，析氢和在30和60°C的测温技术研究了溴离子和碘离子对聚丙烯酰胺（PA）抑制HCl溶液中铝腐蚀的影响。结果表明，卤化物添加剂协同提高了聚丙烯酰胺的抑制效率。发现I'比Br'离子的抑制效率（％I）的增加更为明显。观察到的两种卤化物添加剂的行为差异可能与它们的原子半径以及电负性的差异有关。对于卤化物获得的协同参数（S1）的值大于1，这表明由卤离子的添加​​引起的聚丙烯酰胺的改善的抑制效率是由于协同作用。腐蚀抑制可以归因于抑制剂分子通过物理机理吸附在Al表面上。吸附过程遵循El-Awady吸附等温线的动力学-热力学模型。根据实验数据评估的腐蚀和吸附过程动力学和热力学参数进一步证实了这些结果。

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