A method of introducing aluminium ion into zinc phosphate structure wasproposed in order to provide better application prospects of zinc aluminium phosphate in waterborne anti-rust coatings. The reaction parameters were optimized by orthogonal experiments and analysis of particle size distribution，with a conversion rate of 95.3% and d（0.5）1.529 μm.The product was characterized by use of SEM and found that the silane couplingagent could be bonded with zinc aluminium phosphate closely，and the particles of modifiedzinc aluminium phosphate were fine and uniform in size. Waterborne epoxy primer and waterborne acrylic anti-rust paint were prepared based on the modified zinc aluminium phosphate and tested for salt spray and storage. The results showed that the modified zincaluminium phosphate provided better foam inhibition and anti-rust performance than zincphosphate. The anti-rust mechanism of zinc aluminium phosphate was discussed. It was suggested that a comprehensive anti-rust mechanism of electrochemical inhibition-physicalbarrier was formed between zinc aluminium phosphate and metal surface.
LIAO Huan
,
LIANG Yu-Zhu
,
TUN Liang
,
WANG Fu-Li
,
WANG Shun-Jiang
. Study on Synthesis and Mechanism of a New Antirust Pigment Zinc Aluminum Phosphate[J]. Paint & Coatings Industry, 2019
, 49(10)
: 15
-21
.
DOI: 10.12020/j.issn.0253-4312.2019.10.15
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