Herein, a novel smart chemical strategy for regulating the corrosion reaction to reinforce the plasma electrolytic oxidation (PEO) coating on magnesium by amorphous MnOOH is proposed. The MnOOH film could provide PEO coating with both physical shielding and chemical active healing abilities. During corrosion process, MnOOH spontaneously reacts with the corrosion-produced Mg²⁺ and OH^– to form layered double hydroxides, resulting in high improvement of the long-term anti-corrosion of PEO coating. Moreover, the PEO/MnOOH coating presented a certain self-healing ability for scratches, and could be used for repairing corrosion defects on further coated films.

在此，提出了一种新的智能化学策略，用于调节腐蚀反应，以增强非晶态 MnOOH 对镁的等离子体电解氧化 (PEO) 涂层。MnOOH 薄膜可以为 PEO 涂层提供物理屏蔽和化学活性愈合能力。在腐蚀过程中，MnOOH与腐蚀产生的Mg ²⁺和OH ^-发生自发反应，形成层状双氢氧化物，大大提高了PEO涂层的长期防腐性能。此外，PEO/MnOOH涂层对划痕具有一定的自愈能力，可用于修复后续涂层膜的腐蚀缺陷。