MoS2 nanoflowers/ppy nanorods composited new architectures added with self-healing 8-hydroxyquinoline in epoxy for protection of mild steel against chloride medium corrosion

IF 4.3 3区材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Journal of Physics and Chemistry of Solids Pub Date : 2025-06-24 DOI:10.1016/j.jpcs.2025.112915

Sakshi Khokher, Suman Lata

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引用次数: 0

Abstract

In this paper, 8-Hydroxyquinone-loaded MoS₂ nanoflowers @ Polypyrrole nanotube (PMSHQ) novel coatings with different weight fractions as 0.25 %, 0.50 %, and 1.0 % blended with epoxy resin were prepared. The self-healing behavior and corrosion protection by the composite PMSHQ with and without the loading of 8-Hydroxyquinone was examined for mild steel coupons in 3.5 % sodium chloride medium. The synthesized composites MoS₂ nanoflowers @ Polypyrrole nanotube and PMSHQ were characterized spectroscopically and morphologically along with the hydrophobicity of the coated surfaces (anti-wettability). The corrosion protection tendency of the composites blended in epoxy against corrosion was evaluated through potentiodynamic polarization and electrochemical impedance spectroscopy where the composite PMSHQ (0.5 %) showed maximum corrosion retardation, 99.998 % after 2h immersion. The study was further extended by immersing the coupons for 5 days, 15 days, and 25 days in the corrodent wherein the variation in corrosion protection behavior with exposure time was analyzed. The coated surface was studied for surface roughness by AFM (atomic force microscopy) and the self-healing of the scratch created was analyzed by FESEM (field emission scanning electron microscopy) before and after immersion in 3.5 % NaCl solution. The sustainable corrosion protection efficiency was 91.23 % even after 25 days.

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MoS2纳米花/ppy纳米棒复合新结构，在环氧树脂中加入自修复的8-羟基喹啉，用于保护低碳钢免受氯化物介质的腐蚀

本文制备了负载8-羟基醌的MoS2纳米花@聚吡咯纳米管（PMSHQ）新型涂料，其质量分数分别为0.25%、0.50%和1.0%，与环氧树脂共混。在3.5%氯化钠介质中，研究了复合PMSHQ在8-羟基醌加载和不加载情况下对低碳钢片的自愈行为和防腐性能。对合成的MoS2纳米花@聚吡咯纳米管和PMSHQ复合材料进行了光谱和形貌表征，并对涂层表面的疏水性（抗润湿性）进行了表征。通过动电位极化和电化学阻抗谱对复合材料的防腐性能进行了评价，结果表明，复合材料PMSHQ（0.5%）在浸泡2h后缓蚀率达到99.998%，达到最大缓蚀率。研究进一步延长，分别在腐蚀槽中浸泡5天、15天和25天，分析腐蚀防护性能随暴露时间的变化。用原子力显微镜（AFM）研究了涂层表面的表面粗糙度，并用场发射扫描电镜（FESEM）分析了在3.5% NaCl溶液中浸泡前后涂层表面划痕的自愈性。25 d后的持续防腐效率为91.23%。

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来源期刊

Journal of Physics and Chemistry of Solids 工程技术-化学综合

CiteScore

7.80

自引率

2.50%

发文量

605

审稿时长

40 days

期刊介绍： The Journal of Physics and Chemistry of Solids is a well-established international medium for publication of archival research in condensed matter and materials sciences. Areas of interest broadly include experimental and theoretical research on electronic, magnetic, spectroscopic and structural properties as well as the statistical mechanics and thermodynamics of materials. The focus is on gaining physical and chemical insight into the properties and potential applications of condensed matter systems. Within the broad scope of the journal, beyond regular contributions, the editors have identified submissions in the following areas of physics and chemistry of solids to be of special current interest to the journal: Low-dimensional systems Exotic states of quantum electron matter including topological phases Energy conversion and storage Interfaces, nanoparticles and catalysts.