二维层状双金属氢氧化物(LDHs)在金属腐蚀防护中应用的研究进展

Research Advance in Application of 2D Layered Double Hydroxides(LDHs) in Corrosion Protection of Metals

层状双金属氢氧化物(LDHs)是一类重要的无机功能材料,广泛应用于吸附、催化、医药、阻燃等领域。本文详细介绍了LDHs的结构特性及其在金属防护中的应用研究进展。包括LDHs作为微纳米级缓蚀剂存储器的制备及其在防护涂层体系中的研究进展,以及LDHs薄膜的制备方法及其对金属的短期防护性能。在此基础上,简要介绍将该种薄膜作为防护涂层体系的预处理层的研究现状。最后,对LDHs在金属防护领域的应用前景和发展方向作出了展望。

Layered double hydroxides(LDHs)have been widely used in many areas,such as adsorption,catalysis and fire retardants,as well as medicine and pharmacy etc.This paper first briefly describes the structural characteristics of LDHs and their applications in the field of corrosion protection of metals.Using micro-and nano-materials encapsulated corrosion inhibitors in protective coatings is an emerging anti-corrosion strategy in recent years.The synthesis methods and research progress of LDHs as nanocontainers doped with corrosion inhibitors are introduced in details.Then,the LDHs films fabricated on metal surface are reviewed with emphasis on their preparation processes and applications for temporary corrosion protection.In addition,the use of them as the pretreatment layer for painting systems is also briefly introduced.Finally,the possible developing directions of LDHs in the field of corrosion protection are prospected.