writer：Lu Pengpeng, Fu Xue, Li Xin, Xu Li, Yong Fan, Jie Zhao,* Limei Tian,* Jiyu Sun, and Luquan Ren
keywords：magnetic-response, anticorrosive, mica nanosheets, nanocontainer, corrosion inhibitor
source：期刊
specific source：ACS Applied Materials & Interfaces
Issue time：2023年

An anticorrosive coating with randomly distributed passive barriers

and regionally enriched active corrosion inhibitors is developed by integrating

mica nanosheets (MNSs) and magnetic-responsive core?shell mesoporous

nanoparticles with 2-mercaptobenzothiazole (Fe3O4@mSiO2/MBT) under

magnetic field incubation. The bottom enriched Fe3O4@mSiO2/MBT rapidly

releases the MBT to form a passivation layer on corrosion sites, enhancing the

corrosion inhibition efficiency by 30.36% compared with the control (NP0.7EP-R).

The impedance modulus |Z|0.01 Hz of the sample (NP0.7/MNS0.5/EP) increases by

five orders of magnitude compared with that of its control (NP0.7/MNS0EP) after

30 days of corrosion immersion. NP0.7/MNS0.5/EP exhibited the lowest corrosion

rate (3.984 × 10?5 mm/year) as compared to the other samples. Notably, the

coating in a fractured state still maintains superior corrosion inhibition even after

40 day salt spray testing. The differentiated distribution of nanofillers was well

confirmed by optical microscopy and SEM-EDS, and the synergistic effect of the

active/passive integrated anticorrosive coating with merits of both comprehensive protection and fast responsiveness was

systematically explored.