Fire and Corrosion Resistances of Intumescent Nano-coating Containing Nano-SiO2 in Salt Spray Condition

• Published in: Journal of materials science & technology 2010, Vol.26 (1), p.75-81
• Main Authors: Wang, Zhenyu, Han, Enhou, Liu, Fuchun, Ke, Wei
• Format: Article
• Language: English
• Subjects: X射线光电子能谱; 扫描电子显微镜; 盐雾试验; 纳米二氧化硅; 纳米涂层; 耐腐蚀性; 膨胀型
• ISSN: 1005-0302; 1941-1162
• DOI: 10.1016/S1005-0302(10)60012-6

The nano-concentrates and flame retardant nano-coating were prepared in thhis study. The effect of nano-SiO2 on the corrosion resistance and fire resistance of ammonium polyphosphate-pentaerythritol-melamine （APP- PER-MEL） coating was investigated by differential thermal analysis （DTA）, scanning electron microscopy （SEM）, effective thermal conductivity （λ/d）, X-ray photoelectron spectroscopy （XPS） and fire protection test. The chemical action and endothermic effect of ammonium polyphosphate, pentaerythritol and melamine in traditional flame retardant coating were damaged by salt spray condition, whereas the flame-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 fire-resistant properties even after 500 h salt spray test.