In the application of intumescent fire-retardant coatings for steel structure， weatherability of the coatings was an important topic to be concerned.The effects of UV aging on the phosphorus content，surface morphology，thermal stability and fire retardancy of intumescent fire-retardant coatings were investigated by scanning electron microscopy（SEM）， thermal analysis（TG）and small-scale fire test furnace.The influence of topcoat on the above properties was also studied. The results indicated that the phosphorus content，thermal stability，intumescent charring properties under high temperature and fire retardancy and thermal-insulating properties of fire-retardant coatings decreased obviously after UV aging.The topcoat showed good protection，but the above properties of the fire-retardant coatings showed little changes with the protection of topcoat.
WANG Shun-Xing
,
LIU Dan
,
LIN Gui-De
,
DIAO Bi
,
HU Xing-Li
,
JIN Xing
,
WANG Guo-Hui
. The Effects of UV Aging on Main Properties of Intumescent Fire-Retardant Coatings[J]. Paint & Coatings Industry, 2019
, 49(8)
: 47
-52
.
DOI: 10.12020/j.issn.0253-4312.2019.8.47
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