Nanocontainers with synergistic inhibition for self-warning and self-repairing dual-functional coatings towards enhanced anticorrosion of Mg alloys

IF 6.5 2区 材料科学 Q1 CHEMISTRY, APPLIED
Yixin Chen , Hao Huang , Zhiqiang Gao , Xiaoda Liu , Qian Wang , Lifeng Hou , Yinghui Wei
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Abstract

The design of functional coatings presents significant challenges, especially in achieving an efficient balance and synergy among multiple functions. This study utilized mesoporous silica as structural fillers to encapsulate corrosion inhibitor benzotriazole (BTA) and fluorescent probe fluorescein isothiocyanate (FITC) respectively, developing a dual-functional coating (SiO2-BTA + SiO2-FITC) with outstanding self-warning and self-repairing capabilities based on synergistic effects. The intrinsic stimulus-responsive properties of mesoporous silica were investigated. Disorderness of the mesoporous structure was demonstrated by observing the morphology and analyzing changes in the chemical structure. The accelerated release behavior of BTA and FITC under alkaline stimulation conditions was accurately quantified, with a release rate exceeding 80 %. The corrosion warning of FITC at damage sites is detectable within 10 min under UV light. Electrochemical impedance spectroscopy (EIS) and scanning vibrating electrode technique (SVET) confirmed the synergistic inhibition effects of BTA and FITC, achieving 96.4 % efficiency in protecting the magnesium alloy substrate against corrosion for 24 h. Importantly, the functional coating significantly enhances corrosion resistance, further extending its potential application scope.

Abstract Image

具有协同抑制作用的自预警自修复双功能涂层纳米容器增强镁合金的抗腐蚀性能
功能性涂料的设计面临着巨大的挑战,特别是在实现多种功能之间的有效平衡和协同作用方面。本研究利用介孔二氧化硅作为结构填料,分别包封缓蚀剂苯并三唑(BTA)和荧光探针异硫氰酸荧光素(FITC),基于协同效应,开发出具有突出的自我预警和自我修复能力的双功能涂层(SiO2-BTA + SiO2-FITC)。研究了介孔二氧化硅的内在刺激响应特性。通过形貌观察和化学结构变化分析,证实了介孔结构的无序性。准确定量了BTA和FITC在碱性刺激条件下的加速释放行为,释放率超过80%。在紫外线照射下,10分钟内可检测到损坏部位的FITC腐蚀警告。电化学阻抗谱(EIS)和扫描振动电极技术(SVET)证实了BTA和FITC的协同缓蚀作用,在24 h内保护镁合金基体的效率达到96.4%。重要的是,该功能涂层的耐蚀性显著提高,进一步扩大了其潜在的应用范围。
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来源期刊
Progress in Organic Coatings
Progress in Organic Coatings 工程技术-材料科学:膜
CiteScore
11.40
自引率
15.20%
发文量
577
审稿时长
48 days
期刊介绍: The aim of this international journal is to analyse and publicise the progress and current state of knowledge in the field of organic coatings and related materials. The Editors and the Editorial Board members will solicit both review and research papers from academic and industrial scientists who are actively engaged in research and development or, in the case of review papers, have extensive experience in the subject to be reviewed. Unsolicited manuscripts will be accepted if they meet the journal''s requirements. The journal publishes papers dealing with such subjects as: • Chemical, physical and technological properties of organic coatings and related materials • Problems and methods of preparation, manufacture and application of these materials • Performance, testing and analysis.
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