Anti-corrosion and electrically conductive inorganic conversion coatings based on aligned graphene derivatives by electrodeposition

IF 9.9 2区材料科学 Q1 Engineering Nano Materials Science Pub Date : 2022-09-01 DOI:10.1016/j.nanoms.2021.07.011

Wenxiang Fei , Jincan Cui , Yahui Sun , Junhe Yang , Shanglin Gao , Jing Li

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引用次数: 7

Abstract

Ultrathin conversion coatings, made from aligned graphene derivatives and ammonium zirconium carbonate (AZC), were fabricated on stainless steel by electrodeposition. Sulfonated graphene oxide (SGO) provided electron pathways and physical barriers to corrosive molecules. Electrodeposition ensured the alignment of SGO and the facile fabrication of the coatings. AZC is an environmental-friendly crosslinking agent, water-repellent and corrosion inhibitor. Upon dehydration reactions, AZC improved the cohesion between SGO layers and anchored the conversion coatings on metal substrates. When the mass ratio of SGO to AZC was 2:1, the corrosion current density of the composite coatings reached 0.098 μA cm⁻², while that of the bared stainless steel was 1.04 μA cm⁻², given a coating thickness of only 500 nm. The electrical conductivity of SGO/AZC composite coatings can be tailored from 3.84 × 10⁻⁵ to 2.28 × 10⁻³ S‧cm⁻¹ by heat treatment and HI reduction, which satisfied the electrical conductivity requirement of wide applications in electronic industry, office appliances and petroleum storage.

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基于定向石墨烯衍生物电沉积的防腐导电无机转换涂层

采用电沉积方法在不锈钢表面制备了定向石墨烯衍生物和碳酸锆铵(AZC)的超薄转化涂层。磺化氧化石墨烯(SGO)为腐蚀性分子提供了电子通道和物理屏障。电沉积确保了SGO的排列和涂层的易于制作。AZC是一种环保型交联剂、拒水剂和缓蚀剂。在脱水反应中，AZC提高了SGO层之间的凝聚力，并将转化涂层固定在金属基底上。当SGO与AZC的质量比为2:1时，涂层的腐蚀电流密度达到0.098 μA cm−2，而在涂层厚度仅为500 nm的情况下，裸不锈钢的腐蚀电流密度为1.04 μA cm−2。通过热处理和HI还原，SGO/AZC复合涂层的电导率可达到3.84 × 10−5 ~ 2.28 × 10−3 S·cm−1，满足电子工业、办公电器和石油储存等领域的广泛应用。

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来源期刊

Nano Materials Science Engineering-Mechanics of Materials

CiteScore

20.90

自引率

3.00%

发文量

294

审稿时长

9 weeks

期刊介绍： Nano Materials Science (NMS) is an international and interdisciplinary, open access, scholarly journal. NMS publishes peer-reviewed original articles and reviews on nanoscale material science and nanometer devices, with topics encompassing preparation and processing; high-throughput characterization; material performance evaluation and application of material characteristics such as the microstructure and properties of one-dimensional, two-dimensional, and three-dimensional nanostructured and nanofunctional materials; design, preparation, and processing techniques; and performance evaluation technology and nanometer device applications.