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- Title
Polypyrrole-Modified Molybdenum Disulfide Nanocomposite Epoxy Coating Inhibits Corrosion of Mild Steel.
- Authors
Zhang, Yafeng; Die, Juncheng; Li, Fei; Li, Hai; Tu, Jinchun; Zhang, Kexi; Yu, Xiaolong
- Abstract
The search for lightweight and low-cost anticorrosion coatings is particularly important in coastal environments with high salt and humidity. Graphene-based anticorrosion coatings are currently unable to provide long-lasting corrosion protection for metals because of their "corrosion-promoting activity", and graphene-like materials, such as molybdenum disulfide (MoS2), are beginning to be anticipated its ability to protect against metals. This paper reported a simple method for preparing polypyrrole (PPy)-modified MoS2 nanomaterials from natural bulk MoS2. Their corrosion resistance behavior as fillers for epoxy (EP) resins was investigated in 3.5 wt.% NaCl solution. After the preparation of the MoS2 nanosheet dispersion by liquid-phase sonication using ethanol aqueous solution, the polypyrrole-coated molybdenum disulfide nanomaterials (MoS2@PPy) were directly obtained by adding pyrrole monomer to it in the presence of the initiator ammonium persulfate. Tafel polarization curves showed that the corrosion current of the MoS2@PPy/EP coating was 0.006 µA/cm2 after 15 days of immersion in 3.5 wt.% NaCl solution, much lower than that of pure EP coating (19.134 µA/cm2), effectively improving the anticorrosive properties of the coating. Overall, this study offered a practical method for the application of natural bulk MoS2 for corrosion protection.
- Subjects
MOLYBDENUM disulfide; EPOXY coatings; MILD steel; MOLYBDENUM sulfides; METAL coating; STEEL corrosion; NANOCOMPOSITE materials
- Publication
Coatings (2079-6412), 2023, Vol 13, Issue 6, p1046
- ISSN
2079-6412
- Publication type
Article
- DOI
10.3390/coatings13061046