Electrodeposited graphene/layered double hydroxides micro/nanocontainers for both passive and active corrosion protection

IF 6.6 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

npj Materials Degradation Pub Date : 2024-02-27 DOI:10.1038/s41529-024-00443-z

Teng Xu, Qian-Yu Wang, Jin-Tao Zhang, Ji-Ming Hu

引用次数: 0

Abstract

The poor dispersibility of layered double hydroxides (LDHs) is considered to be the main drawback limiting their application in anti-corrosive coatings. In this work, the problem is solved by combining LDHs with graphene (Gr). A facile electrochemically assisted deposition technique (EAT) is developed to prepare Gr/LDH micro/nano-containers. The high-barrier Gr and LDHs synergistically build a ‘labyrinth effect’ to lengthen the diffusion path of corrosive mediums. Moreover, corrosion inhibitors can be released from the interlayer galleries of LDHs and impede corrosion of metal substrate by substituting the aggressive ions. Therefore, the polyvinyl butyral (PVB) coatings doped with Gr/LDH micro/nano-containers pre-loaded with inhibitors 2-Mercaptobenzothiazole (MBT) have both passive and active corrosion protection properties and provide excellent protection to copper substrate.

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用于被动和主动防腐蚀的电沉积石墨烯/层状双氢氧化物微型/纳米容器

层状双氢氧化物（LDHs）分散性差被认为是限制其在防腐蚀涂层中应用的主要缺点。在这项研究中，LDHs 与石墨烯（Gr）的结合解决了这一问题。研究人员开发了一种简便的电化学辅助沉积技术（EAT）来制备 Gr/LDH 微型/纳米容器。高阻隔 Gr 和 LDHs 协同形成 "迷宫效应"，延长了腐蚀性介质的扩散路径。此外，腐蚀抑制剂可以从 LDHs 的层间廊道中释放出来，通过替代侵蚀性离子来阻碍金属基底的腐蚀。因此，掺杂了预载抑制剂 2-巯基苯并噻唑（MBT）的 Gr/LDH 微型/纳米容器的聚乙烯醇缩丁醛（PVB）涂层具有被动和主动防腐特性，可为铜基材提供出色的保护。

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

npj Materials Degradation MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

7.80

自引率

7.80%

发文量

审稿时长

6 weeks

期刊介绍： npj Materials Degradation considers basic and applied research that explores all aspects of the degradation of metallic and non-metallic materials. The journal broadly defines ‘materials degradation’ as a reduction in the ability of a material to perform its task in-service as a result of environmental exposure. The journal covers a broad range of topics including but not limited to: -Degradation of metals, glasses, minerals, polymers, ceramics, cements and composites in natural and engineered environments, as a result of various stimuli -Computational and experimental studies of degradation mechanisms and kinetics -Characterization of degradation by traditional and emerging techniques -New approaches and technologies for enhancing resistance to degradation -Inspection and monitoring techniques for materials in-service, such as sensing technologies