In situ preparation of graphene coating bonded to stainless steel substrate via Cr C bonding for excellent anticorrosion and wear resistant
In situ preparation of graphene coating bonded to stainless steel substrate via Cr C bonding for excellent anticorrosion and wear resistant
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DOI：
10.1016/j.apsusc.2019.06.197
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发表时间：
2019-10
影响因子：
6.7
通讯作者：
Hanqing Xu;J. Zang;Yungang Yuan;P. Tian;Yanhui Wang
中科院分区：
文献类型：
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作者：
Hanqing Xu;J. Zang;Yungang Yuan;P. Tian;Yanhui Wang
金属腐蚀防护由于其对商业应用的重要性而成为一个活跃的研究领域。然而，传统涂层的耐用性、热稳定性和导电性有限，因此并不适用。尽管石墨烯已显示出防腐蚀的潜力，但很难在商业钢材上直接生长高质量的石墨烯。本文采用简单的球磨方法在不锈钢球（SS）上制备石墨烯涂层以进行腐蚀防护，其中通过石墨晶体的原位机械剥离将不锈钢球均匀地包裹在石墨烯涂层中。石墨烯涂层通过 Crsingle bondC 键合与 SS 牢固结合，为持久的腐蚀保护奠定了基础。腐蚀分析表明，石墨烯覆盖的 SS 的腐蚀速率比裸露的 SS 降低了 20 倍。此外，原位剥离石墨烯涂层可以显着提高耐磨性，磨损率从6.45×10−13下降到4.31×10−13m2N−1。本研究还可以提供一种在金属基材上制备石墨烯涂层的直接方法。
Corrosion protection of metals is an active research area due to its importance for commercial applications. However, conventional coating exhibits limited durability, thermal stability and conductivity and is thus not suitable. Although graphene has shown the potential for corrosion protection, it is difficult to directly grow high-quality graphene on commercial steels. Herein, a simple ball-milling method is used to prepare graphene coating on stainless steel balls (SS) for corrosion protection, in which the SS are uniformly encapsulated with graphene coatings by in situ mechanical peeling of graphite crystals. The graphene coating is strongly bonded to the SS via Crsingle bondC bonding, which provides a base for long-lasting corrosion protection. Corrosion analysis reveals that the corrosion rate of the graphene covered SS was reduced up to twenty times lower than that of the bare SS. Furthermore, in situ exfoliated graphene coating can significantly improve the wear resistance, which the wear rate decreased from 6.45 × 10−13to 4.31 × 10−13m2N−1. The present study can also provide a straightforward approach towards preparing graphene coatings on metal substrate.