Graphene is the thinnest, strongest and most conductive material ever identified and the best barrier materials known to date, making it the most ideal building blocks for fabricating polymer composite coatings applied in metal corrosion protection. However, graphene nanosheets are typically constructed into macroscopic composite coatings through traditional blending approaches, their beneficial properties may degrade from the aggregation and random orientation of nanosheets, and galvanic corrosion and many other obstacles. Therefore, it still keeps a huge challenge to assembly graphene nanosheets into high-performance graphene-based composite coatings (GCCs) in practical applications. Natural nacre, which is composed of organic and inorganic components arranged in a complicated but amazingly hierarchical structure, shows a unique combination of excellent strength, toughness, stiffness, antipermeation, self-healing property, and possibly extra functionality, enabling it to live through millions of years in the sea with 3.5 wt% NaCl. This provides a gold example and guideline for preparing graphene nanosheets into high-performance and multifunctional GCCs. Regrettably, to date, relatively rare works were reported on nacre-inspired GCCs, and only a several approaches have been established to construct the bioinspired GCCs. This review summarizes recent research on the nacre-inspired GCCs, and discusses the relationship between alignment and properties in several representative orientation approaches. Fundamental properties of the bioinspired GCCs, including barrier, anticorrosion, and passivation properties, were highlighted. Finally, outlooks and challenges were presented for the future to highlight the strategies on how to fabricate high-performance GCCs with expected multifunction.

石墨烯是迄今为止发现的最薄、最强和最导电的材料，也是迄今为止已知的最好的阻隔材料，使其成为制造应用于金属腐蚀防护的聚合物复合涂层的最理想的构件。然而，石墨烯纳米片通常通过传统的共混方法构建成宏观复合涂层，其有益性能可能会因纳米片的聚集和随机取向以及电偶腐蚀和许多其他障碍而退化。因此，将石墨烯纳米片组装成高性能石墨烯基复合涂层（GCCs）在实际应用中仍然存在巨大挑战。天然珍珠层，由有机和无机成分组成，排列复杂但层次结构惊人，显示出优异的强度、韧性、刚度、抗渗透性、自愈性和可能的​​额外功能的独特组合，使其能够在 3.5 wt% NaCl 的海洋中生存数百万年。这为将石墨烯纳米片制备成高性能和多功能 GCC 提供了一个很好的例子和指导方针。遗憾的是，迄今为止，关于珍珠层启发的 GCC 的报道相对较少，并且仅建立了几种方法来构建仿生 GCC。这篇综述总结了最近对珍珠层启发的 GCC 的研究，并讨论了几种代表性取向方法中排列和特性之间的关系。重点介绍了仿生 GCC 的基本特性，包括阻隔、防腐和钝化特性。最后，