Comprehensive study of synergistic corrosion inhibition for XC48 steel in acidic medium using cistus creticus extract and iodide ions: Integrative experimental and computational analysis

IF 6.3 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers Pub Date : 2025-09-05 DOI:10.1016/j.jtice.2025.106383

Amina Belakhdar , Souad Djellali , Hana Ferkous , Belgacem Bezzina , Abir Boublia , Malika Berredjem , Yasser Ben Amor , Barbara Ernst , Manawwer Alam , Yacine Benguerba

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Abstract

Background

Plant-derived compounds are gaining attention as eco-friendly corrosion inhibitors due to their polyphenolic content and strong adsorption capability. This study investigates the synergistic inhibition effect of Cistus creticus (CC) extract and potassium iodide (KI) on XC48 carbon steel in 0.5 M H₂SO₄ solution.

Methods

Electrochemical techniques, including potentiodynamic polarization (PDP), electrochemical impedance spectroscopy (EIS), and weight-loss (WL) measurements, were employed to evaluate corrosion behavior at temperatures ranging from 298–328 K and immersion times up to 163 h. Surface characterization was carried out using scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). Theoretical analysis was performed using Density Functional Theory (DFT), COSMO-RS, and Monte Carlo simulations to provide molecular-level insights.

Significant Findings

CC extract alone exhibited moderate inhibition efficiency (∼58% at 500 ppm), which increased significantly to above 91% when combined with 83 ppm KI. WL results confirmed enhanced adsorption and long-term stability. PDP analysis indicated a mixed-type inhibition mechanism, while EIS demonstrated increased charge-transfer resistance and reduced double-layer capacitance in the presence of CC + KI. Adsorption data fitted the Langmuir isotherm, with thermodynamic parameters suggesting a mixed physisorption–chemisorption process. Computational studies revealed strong adsorption potential of CC polyphenols on Fe(110), further strengthened by iodide ions, corroborating the experimental findings.

These results demonstrate that the CC–KI system offers a sustainable and highly efficient approach to carbon steel corrosion inhibition, where the synergistic effect depends strongly on iodide concentration.

Abstract Image

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紫荆提取物与碘离子在酸性介质中协同缓蚀XC48钢的综合研究：实验与计算分析相结合

植物源化合物由于其多酚类化合物的含量和较强的吸附能力，作为环保型缓蚀剂越来越受到人们的关注。在0.5 M H₂SO₄溶液中，研究了山竹提取物（CC）和碘化钾（KI）对XC48碳钢的协同抑制作用。方法采用电化学技术，包括动电位极化（PDP）、电化学阻抗谱（EIS）和失重（WL）测量，在298-328 K的温度范围内和163 h的浸泡时间内评估腐蚀行为。表面表征采用扫描电子显微镜（SEM）、x射线衍射（XRD）和x射线光电子能谱（XPS）进行。利用密度泛函理论（DFT）、cosmos - rs和蒙特卡罗模拟进行理论分析，以提供分子水平的见解。scc提取物单独表现出中等的抑制效率（500 ppm时约58%），当与83 ppm的KI联合使用时显着增加到91%以上。WL结果证实了增强的吸附和长期稳定性。PDP分析显示混合型抑制机制，而EIS显示CC + KI存在时电荷转移电阻增加，双层电容降低。吸附数据符合Langmuir等温线，热力学参数表明这是一个混合的物理-化学吸附过程。计算研究表明CC多酚对Fe（110）有很强的吸附潜力，碘离子进一步增强了吸附潜力，证实了实验结果。这些结果表明，CC-KI体系提供了一种可持续和高效的碳钢缓蚀方法，其中协同效应强烈依赖于碘化物浓度。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of the Taiwan Institute of Chemical Engineers 工程技术-工程：化工

CiteScore

9.10

自引率

14.00%

发文量

362

审稿时长

35 days

期刊介绍： Journal of the Taiwan Institute of Chemical Engineers (formerly known as Journal of the Chinese Institute of Chemical Engineers) publishes original works, from fundamental principles to practical applications, in the broad field of chemical engineering with special focus on three aspects: Chemical and Biomolecular Science and Technology, Energy and Environmental Science and Technology, and Materials Science and Technology. Authors should choose for their manuscript an appropriate aspect section and a few related classifications when submitting to the journal online.