Synergistic effect of iodide ions and bark resin of Schinus molle for the corrosion inhibition of API5L X70 pipeline steel in H2SO4,Materials and Corrosion

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Synergistic effect of iodide ions and bark resin of Schinus molle for the corrosion inhibition of API5L X70 pipeline steel in H2SO4
Materials and Corrosion ( IF 1.6 ) Pub Date : 2020-02-26 , DOI: 10.1002/maco.202011533
Mounir Djellab _{1,

2} , Hamza Bentrah _{1,

2} , Abdelouahad Chala _{2,

3} , Hicham Taoui _{1,

2} , Slimane Kherief _{1,

2} , Bouzid Bouamra _{2,

3}

Affiliation

The synergistic effect of bark resin of Schinus molle (BRSM) and iodide ions in 0.5 M sulfuric acid has been studied for the first time by potentiodynamic polarization and electrochemical impedance spectroscopy measurements; also, the surface morphology has been analyzed by scanning electron microscopy–energy‐dispersive X‐ray spectroscopic analysis in the present work. The results show that the BRSM and iodide ions have an evident synergistic inhibition effect in a 0.5‐M sulfuric acid solution. The adsorption of the BRSM/iodide ion system follows the Langmuir adsorption isotherm and acts as a mixed‐type inhibitor in sulfuric acid. The BRSM/iodide ion system is an effective inhibitor for API5L X70 pipeline steel in the 0.5‐M sulfuric acid solution. The maximum percentage inhibition efficiency is equal to 99% at 1 g/L BRSM + 2 mM KI.

中文翻译：

中华绒螯蟹碘离子和树皮树脂协同作用对API5L X70管线钢在H2SO4中的缓蚀作用

中华绒螯蟹树皮树脂的协同作用电位动力学极化和电化学阻抗谱测量法首次研究了0.5 M硫酸中的（BRSM）和碘离子。同样，在本工作中，已经通过扫描电子显微镜–能量色散X射线光谱分析对表面形态进行了分析。结果表明，BRSM和碘离子在0.5M的硫酸溶液中具有明显的协同抑制作用。BRSM /碘离子系统的吸附遵循Langmuir吸附等温线，在硫酸中起混合型抑制剂的作用。在0.5M硫酸溶液中，BRSM /碘离子系统是API5L X70管线钢的有效抑制剂。在1 g / L BRSM + 2 mM KI下，最大抑制效率百分比等于99％。

更新日期：2020-02-26

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