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通过实验和理论方法,新合成的基于二甲的离子液体的抗腐蚀性能

Amira Hossam Eldin Moustafa¹, Hanaa H Abdel-Rahman², Mohamed Hagar^2,3

¹Chemistry Department, Faculty of Science, Alexandria University, P.O. 426 Ibrahemia, Alexandria, 21321, Egypt. Amira.mostafa@alexu.edu.eg.

Scientific reports

|November 6, 2023

概括

两种新的基于二皮里丁的离子液体 (P_ILs) 有效地抑制了碳钢在酸中的腐蚀. 比斯皮里丁-1-四甲酸 (BPHP) 显示出卓越的性能,达到76.19%的抑制效率.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
腐蚀科学腐蚀科学

背景情况:

碳钢 (CS) 在激烈的酸性环境中容易腐蚀,如8M H3PO4.4.
开发有效的,无毒的腐蚀抑制剂对于工业应用至关重要.
离子液体 (ILs) 作为环保腐蚀抑制剂具有有前途的性能.

研究的目的:

为碳钢合成和研究两种基于二平的新型离子液体 (P_ILs) 作为腐蚀抑制剂.
为了评估 bispyridine-1-ium四甲酸 (BPHP) 和TFPHP在8M H3PO4.4中的抑制效率.
用电化学和表面表征技术阐明腐蚀抑制机制,得到理论计算的支持.

主要方法:

使用1HNMR和13CNMR对P_ILs进行合成和结构验证.
电化学腐蚀试验 (潜在动力极化,EIS) 和表面分析 (SEM-EDX,AFM,XPS).
密度函数理论 (DFT) 对分子静电电位和反应率指数的计算.

主要成果:

在8M H3PO4.4中,BPHP和TFPHP对碳钢表现出显著的腐蚀抑制.
在37.5×10−5M和293K时,BPHP达到76.19%的最大抑制效率.
在相同的最佳条件下,TFPHP显示了71.43%的抑制效率.
吸附遵循El-Awady等热法,表明物理化学吸附.
DFT的结果与实验电化学测量有很好的相关性.

结论:

研究的二皮里丁基离子液体是碳钢的有效,无毒的腐蚀抑制剂.
BPHP是一种高效的抑制剂,提供均的表面覆盖和防腐蚀保护.
实验和理论方法的结合提供了对腐蚀抑制机制的全面了解.

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