Fire and Corrosion Resistances of Intumescent Nano-coating Containing Nano-SiO2 in Salt Spray Condition
Zhenyu Wang,Enhou Han,Fuchun Liu,Wei Ke
Journal of Materials Sciences & Technology (J. Mater. Sci. Technol.)
Abstract
The nano-concentrates and ame retardant nano-coating were prepared in thhis study. The eect of nano-SiO2 on the corrosion resistance and re resistance of ammonium polyphosphate-pentaerythritol-melamine (APP- PER-MEL) coating was investigated by dierential thermal analysis (DTA), scanning electron microscopy (SEM), eective thermal conductivity ( /d), X-ray photoelectron spectroscopy (XPS) and re protection test. The chemical action and endothermic eect of ammonium polyphosphate, pentaerythritol and melamine in traditional ame retardant coating were damaged by salt spray condition, whereas the ame-retardant additives in the nano-coating demonstrated the good chemical interaction in salt spray condition. The uniformly dispersed nano-SiO2 particles could improve corrosion resistance of the coating, and hence nano-coating could remain the good re-resistant properties even after 500 h salt spray test.
keywords:Nano-SiO2; APP-PER-MEL coating; Nano-coating; Salt spray test; Fire-resistant property
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