Disc-like α-zirconium phosphate（α-ZrP）was synthesized using hydrothermal method and used as a functional filler to prepare the novel polyester powder anti-corrosion coatings. The physical morphology and chemical structure of zirconium phosphate were characterized by using SEM，FT-IR and XRD. The thermal stability and micromorphology ofthe anticorrosion coatings were investigated using TG-DTG and SEM respectively. The impedance spectra（EIS） and polarization curves（LSV） of polyester powder coatings with different content of α-ZrP were tested in a 3.5wt.%NaCl aqueous solutionto simulate the marine environment for different time. The effect of α-ZrP on corrosion resistance of polyester powder coatings was analyzed. The results showed that addition of α-ZrP could significantly improve the anticorrosion performance of the polyester coatings with a reduction of corrosion current density by 1~3 orders of magnitude compared with the pure polyester coatings，and the corrosion voltage of the coatings also shifted positively. When the content of α-ZrP was 3% of the total composition，the coatings provided the best corrosion resistance.
CI Tu-Yue
,
JI Yi-Yi
,
HUANG Hong
,
SHI Ying-Ji
. Study on Effect of α-Zirconium Phosphate on Corrosion Resistance of Polyester Powder Coatings[J]. Paint & Coatings Industry, 2019
, 49(11)
: 32
-39
.
DOI: 10.12020/j.issn.0253-4312.2019.11.32
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