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Advanced anti-corrosion coatings prepared from α-zirconium phosphate/polyurethane nanocomposites
- Source :
- RSC Advances. 7:9908-9913
- Publication Year :
- 2017
- Publisher :
- Royal Society of Chemistry (RSC), 2017.
-
Abstract
- This paper presents the first successful application of α-zirconium phosphate/polyurethane (ZrP/PU) nanocomposites for corrosion protection. ZrP nanoplatelets were synthesized using a reflux method and modified with a polyetheramine surfactant (Jeffamine M1000) to form organic ZrP nanoplatelets. ZrP/PU nanocomposite films were based on PU and ZrP with different ZrP contents from 0.5–5 wt%. To probe the internal morphology of ZrP/PU nanocomposites, their cross-sections were examined by scanning and transmission electron microscopy. The results reveal that ZrP dispersed very well in PU films and that no substantial agglomeration occurred. Well-dispersed ZrP nanoplatelets in a PU matrix could effectively enhance the moisture barrier properties of ZrP/PU films. The water vapor transmission rate was significantly reduced to 84 g m−2 per day for ZrP/PU films compared to 194 g m−2 per day for pure PU films. Using a series of electrochemical measurements of corrosion potential (Ecorr), polarization resistance (Rp), corrosion current (Icorr), and electrochemical impedance spectroscopy, ZrP/PU coatings on cold-rolled steel electrodes were also found to exhibit enhanced corrosion protection properties compared to pure PU coatings.
- Subjects :
- Materials science
Nanocomposite
General Chemical Engineering
02 engineering and technology
General Chemistry
010402 general chemistry
021001 nanoscience & nanotechnology
Electrochemistry
01 natural sciences
0104 chemical sciences
Corrosion
Dielectric spectroscopy
chemistry.chemical_compound
chemistry
Zirconium phosphate
Chemical engineering
Transmission electron microscopy
0210 nano-technology
Polarization (electrochemistry)
Polyurethane
Subjects
Details
- ISSN :
- 20462069
- Volume :
- 7
- Database :
- OpenAIRE
- Journal :
- RSC Advances
- Accession number :
- edsair.doi...........256fdeb2d8dfe1f2bcf1cae0234e111b