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Fabrication of active corrosion protection waterborne polyurethane coatings using cerium modified palygorskite nanocontainers
Author(s) -
Ni Lingli,
Li Shanshan,
Liu Yongtao,
Jiang Xiaowu,
Cai Peng,
Feng Liangdong,
Zhang Shizhong,
Gao Xiaoyan
Publication year - 2021
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.50899
Subject(s) - materials science , polyurethane , corrosion , dielectric spectroscopy , coating , palygorskite , chemical engineering , cerium , nuclear chemistry , electrochemistry , metallurgy , composite material , chemistry , organic chemistry , electrode , adsorption , engineering
The development of eco‐efficient and environmental friendly active anti‐corrosion coatings for metallic substrates represents a fundamental milestone in many engineering applications. Herein, a new type of active corrosion protection coating was successfully synthesized simply based on waterborne polyurethane (WPU) and nanocontainer of Ce 3+ modified palygorskite (Ce‐PAL). Particularly, the nanocontainer of Ce‐PAL was achieved via a facile and green process by cation exchange in water. Inductively coupled plasma atomic emission spectrometry (ICP) revealed that Ce 3+ had successfully incorporated into PAL nanofibers with a loading amount of 10.334 g/kg. The salt immersion test, electrochemical potentiodynamic measurements and electrochemical impedance spectroscopy (EIS) demonstrated that the incorporation of Ce‐PAL only with 2 wt% into WPU led to a significant improvement of their corrosion protection properties. Finally, according to the results of scanning electron microscopy with energy dispersive X‐ray spectroscopy, the active anti‐corrosion mechanism of Ce‐PAL/WPU coating was proposed.