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多维杂化金属膦酸盐配位网络作为协同防腐涂层

Multidimensional Hybrid Metal Phosphonate Coordination Networks as Synergistic Anticorrosion Coatings.

作者信息

Fanourgiakis Apostolos, Chachlaki Elpiniki, Plesu Nicoleta, Choquesillo-Lazarte Duane, Kirillov Alexander M, Demadis Konstantinos D

机构信息

Crystal Engineering, Growth and Design Laboratory, Department of Chemistry, University of Crete, Voutes Campus, Heraklion, Crete GR-71003, Greece.

"Coriolan Drăgulescu" Institute of Chemistry, 300223 Timisoara, Romania.

出版信息

Inorg Chem. 2024 Aug 26;63(34):16018-16036. doi: 10.1021/acs.inorgchem.4c02545. Epub 2024 Aug 12.

DOI:10.1021/acs.inorgchem.4c02545
PMID:39133820
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11351182/
Abstract

In the technologically important field of anticorrosion coatings, it is imperative to form well-defined and characterized films to protect the metal surface from corrosion. Phosphonate-based corrosion mitigation approaches are currently being exploited. Herein, the synergistic action of alkaline-earth metal ions and two carboxy-diphosphonates, PAIBA [-bis(phosphonomethyl)-2-aminoisobutyric acid] and BPMGLY [-(phosphonomethyl)glycine], is explored. Also, a family of four novel hybrid metal phosphonate materials is reported, Mg-PAIBA, Ca-PAIBA, Sr-PAIBA, and Sr-Na-PAIBA, whose topological analysis revealed a variety of underlying networks with the 6,10T9, , SP 1-periodic net (4,4)(0,2), and unique topologies. The synergistic metal/carboxy-diphosphonate blends were tested for their anticorrosion performance on carbon steel at preselected concentrations (0.1-1.0 mM) and pH values (4.0-6.0). The results showed an enhanced inhibitory performance in the presence of metal cations at higher concentrations. The inhibition of corrosion at pH 5.0 in the presence of BPMGLY, PAIBA, and their combination with Sr was investigated in detail using electrochemical measurements. Enhanced inhibition was achieved with a 1:1 Sr/BPMGLY (or PAIBA) binary system. Polarization curves indicated that the system is a "mixed" inhibitor. This study widens the family of carboxyphosphonate coordination polymers, showing their potential as attractive hybrid coatings with anticorrosion performance.

摘要

在防腐涂料这个技术上很重要的领域，形成定义明确且特性良好的薄膜以保护金属表面免受腐蚀是至关重要的。目前正在探索基于膦酸盐的缓蚀方法。在此，研究了碱土金属离子与两种羧基二膦酸盐，即PAIBA [-双(膦酰甲基)-2-氨基异丁酸] 和BPMGLY [-(膦酰甲基)甘氨酸] 的协同作用。此外，还报道了一族四种新型混合金属膦酸盐材料，即Mg-PAIBA、Ca-PAIBA、Sr-PAIBA和Sr-Na-PAIBA，其拓扑分析揭示了具有6,10T9, 、SP 1-周期网(4,4)(0,2) 以及独特拓扑结构的各种潜在网络。在预选浓度（0.1 - 1.0 mM）和pH值（4.0 - 6.0）下，测试了协同金属/羧基二膦酸盐混合物在碳钢上的防腐性能。结果表明，在较高浓度的金属阳离子存在下，抑制性能增强。使用电化学测量详细研究了在pH 5.0时，BPMGLY、PAIBA及其与Sr的组合对腐蚀的抑制作用。1:1的Sr/BPMGLY（或PAIBA）二元体系实现了增强的抑制效果。极化曲线表明该体系是一种“混合型”抑制剂。这项研究拓宽了羧基膦酸盐配位聚合物家族，显示出它们作为具有防腐性能的有吸引力的混合涂层的潜力。

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