摘要
使用加入纳米SiO_2的低温磷化液在低碳钢表面制备了磷化膜,并对其形貌、成分、厚度、粗糙度以及耐蚀性进行表征,研究了纳米SiO_2对磷化膜结构和性能的影响。结果表明,纳米SiO_2不是磷化膜的主要成分,但是在磷化液中添加纳米SiO_2使磷化膜增厚、细化磷化膜晶粒、提高磷化膜致密度,并提高了磷化膜的耐腐蚀性能。当纳米SiO_2的加入量为2g/L时,磷化膜在5%NaCl溶液中的耐腐蚀性最好,府蚀电流密度为0.231μA/cm^2。
Under the low temperature conditions,phosphate coating on the surface of mild steel by the addition of nano-SiO_2 in phosphating solution was prepared in this paper.The influence of nano-SiO_2 on structure and performance of phosphate coating was investigated by SEM,XRD,EDS,thickness, surface roughness and corrosion electrochemical testing.The results show that although nano-SiO_2is not main component of phosphate coating,but the coating thickness decreases with increasing the concentration of nano-SiO_2,nano-SiO_2 can reduce the crystal size of coating and increase the density and corrosion resistance of coating.When the nano-SiO_2 concentration is 2 g/L,the best corrosion resistance of phosphate coating is obtained in 3.5%NaCI solution.The corrosion current of phosphating sample was 0.231μA/cm^2 in 5%NaCI solution.
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
2011年第4期362-368,共7页
Chinese Journal of Materials Research
基金
国家自然科学基金50571059和50615024
教育部新世纪优秀人才支持计划NCET-07-0536
教育部创新团队计划RT0739资助项目~~
关键词
材料失效与保护
磷化
低碳钢
纳米SIO2
耐腐蚀性
materials failure and protection
phosphorization
mild steel
nano-SiO2
corrosion resistance