Design a new type of composite coating of functionalized graphene oxide - composite pyrrhotite/ epoxy resin with excellent hydrogen barrier performance

IF 7.4 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Science Pub Date : 2025-08-14 DOI:10.1016/j.corsci.2025.113261

Hongxia Wan , Wenlu Min , Lin Geng , Ya Li , Dongdong Song , Changfeng Chen

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Abstract

To solve the problem of hydrogen embrittlement in hydrogen pipelines, a novel composite hydrogen barrier coating strategy was proposed. In this paper, a unique composite filler was designed by covalently bridging magnetic pyrite (Py) by γ-aminopropyltriethoxysilane (KH550) through the carboxymethyl chitosan (CMCS) functionalized graphene oxide (GO). A novel composite coating (GP/EP) was prepared by loading composite fillers into aqueous epoxy resin (EP). After immersing 0.25 % GP/EP coating in 3.5 wt% NaCl solution for 14 d, the impedance value was still as high as 10⁸ Ω∙cm², which was an order of magnitude higher than that of pure EP. The adhesion of the coating was above 9 MPa. The hydrogen content of 0.25 % GP/EP and the hydrogen diffusion coefficient are reduced by nearly 97 % compared with X80. The synergistic effect of the two composite fillers, GO and Py improved the hydrogen barrier as well as the corrosion resistance of the coating. It provides a promising solution for the protection of hydrogen transport pipelines.

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设计一种具有优异隔氢性能的功能化氧化石墨烯-磁黄铁矿/环氧树脂复合涂层

为解决氢气管道中的氢脆问题，提出了一种新型复合氢屏障涂层策略。本文设计了一种独特的复合填料，通过羧甲基壳聚糖（CMCS）功能化氧化石墨烯（GO），以γ-氨基丙基三乙氧基硅烷（KH550）共价桥接磁性黄铁矿（Py）。通过在水性环氧树脂（EP）中填充复合填料，制备了一种新型的GP/EP复合涂层。0.25 % GP/EP涂层在3.5 wt% NaCl溶液中浸泡14 d后，阻抗值仍高达108 Ω∙cm2，比纯EP高出一个数量级。涂层的附着力在9 MPa以上。与X80相比，0.25 % GP/EP的氢含量和氢扩散系数降低了近97 %。氧化石墨烯和Py两种复合填料的协同作用提高了涂层的氢阻隔性和耐腐蚀性。它为氢气输送管道的保护提供了一种很有前途的解决方案。

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来源期刊

Corrosion Science 工程技术-材料科学：综合

CiteScore

13.60

自引率

18.10%

发文量

763

审稿时长

46 days

期刊介绍： Corrosion occurrence and its practical control encompass a vast array of scientific knowledge. Corrosion Science endeavors to serve as the conduit for the exchange of ideas, developments, and research across all facets of this field, encompassing both metallic and non-metallic corrosion. The scope of this international journal is broad and inclusive. Published papers span from highly theoretical inquiries to essentially practical applications, covering diverse areas such as high-temperature oxidation, passivity, anodic oxidation, biochemical corrosion, stress corrosion cracking, and corrosion control mechanisms and methodologies. This journal publishes original papers and critical reviews across the spectrum of pure and applied corrosion, material degradation, and surface science and engineering. It serves as a crucial link connecting metallurgists, materials scientists, and researchers investigating corrosion and degradation phenomena. Join us in advancing knowledge and understanding in the vital field of corrosion science.