半乳甘露聚糖作为一种新型生物源酸性介质中铁的缓蚀剂。

Galactomannan as a new bio-sourced corrosion inhibitor for iron in acidic media.

作者信息

Abbout Said, Zouarhi Meryem, Chebabe Driss, Damej Mohamed, Berisha Avni, Hajjaji Najat

机构信息

Laboratory of Materials, Electrochemistry and Environment, Team of Corrosion, Protection and Environment, Department of Chemistry, Faculty of Sciences, Ibn Tofail University, BP 133, 14000 Kenitra, Morocco.

Laboratory of Natural Substances & Synthesis and Molecular Dynamic, Faculty of Sciences and Techniques, Moulay Ismail University of Meknes, BP 509, 52000, Boutalamine, Errachidia, Morocco.

出版信息

Heliyon. 2020 Mar 18;6(3):e03574. doi: 10.1016/j.heliyon.2020.e03574. eCollection 2020 Mar.

DOI:10.1016/j.heliyon.2020.e03574

PMID:32211546

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7082521/

Abstract

The aim of this study is to evaluate the impact of a bio-sourced polymer as a corrosion inhibitor against iron corrosion in a 1 M HCl solution. Galactomannan was obtained from the carob plant (Ceratonia Siliqua L) and its structure was verified by infrared spectroscopy (FTIR) and elemental analysis. The inhibitor concentration effects and immersion time on the resistance of the iron surface against corrosion are evaluated using impedance and polarization electrochemical measurements, UV-visible analysis and theoretical study. The results show that the galactomannan is a mixed type inhibitor act by physisorption and chemisorption on the metal surface. In addition, the efficiency of these compounds increases with increasing the concentration of the inhibitor and reaches a value of 87.72% at a concentration of 1 g/l. The electrode surface was characterized by SEM surface analysis method coupled with EDS.

摘要

本研究的目的是评估一种生物源聚合物作为1 M HCl溶液中铁腐蚀抑制剂的效果。半乳甘露聚糖从角豆树（Ceratonia Siliqua L）中提取，其结构通过红外光谱（FTIR）和元素分析进行验证。使用阻抗和极化电化学测量、紫外可见分析以及理论研究来评估抑制剂浓度效应和浸泡时间对铁表面耐腐蚀性能的影响。结果表明，半乳甘露聚糖是一种混合型抑制剂，通过物理吸附和化学吸附作用于金属表面。此外，这些化合物的效率随着抑制剂浓度的增加而提高，在浓度为1 g/l时达到87.72%。通过扫描电子显微镜（SEM）表面分析方法结合能谱仪（EDS）对电极表面进行了表征。