Corrosion inhibition of layered double hydroxides for metal-based systems

Layered double hydroxide (LDH), a kind of 2D layered materials, has been recognized as the promising anticorrosion materials for metal and its alloy. The microstructure, physical/chemical properties, usage in corrosion inhibition and inhibition performance of LDH have been studied separately in open literature. However, there is a lack of a complete review to summarize the status of LDH technology and the potential R&D opportunities in the field of corrosion inhibition. In addition, the challenges for LDH in corrosion inhibition of metal-based system have not been summarized systematically. Herein, we review recent advances in the rational design of LDH for corrosion inhibition of metal-based system (i.e. Mg alloy, Al alloy, steel and concrete) and high-throughput anticorrosion materials development. By evaluating the physical/chemical properties, usage in metal-based system and the corrosion inhibition mechanism of LDH, we highlight several important factors of LDH for anticorrosion performance and common features of LDH in applying different metal alloys. Finally, we provide our perspective and recommendation in this field, including high-throughput techiniques for combinatorial compositional design and rapid synthesis of anticorrosion alloys, with the goal of accelerating the development and application of LDH in corrosion inhibition of metal-based system.