SiO2包覆铝粉对锌铝混合粉的析氢抑制  

Inhibition of Hydrogen Evolution for Powder Mixture of Zn and Al by SiO_2 Coated Al

作　　者：李庆鹏[1,2] 丁国强[3] 刘建国[2] 赫秀娟[1] 严川伟[2] 

机构地区：[1]沈阳化工学院材料科学与工程学院 [2]中国科学院金属研究所金属腐蚀与防护国家重点实验室 [3]中国人民解放军92538部队装备部舰务处

出　　处：《腐蚀科学与防护技术》2010年第6期495-498,共4页Corrosion Science and Protection Technology

摘　　要：以正硅酸乙酯(TEOS)为原料在片状铝粉表面包覆SiO_2,通过扫描电镜(SEM)和X射线光电子能谱仪(XPS)对包覆的铝粉进行表征,并研究了包覆铝粉对锌铝混合粉的析氢行为的影响.结果表明:SiO_2包覆铝粉后可以有效地抑制锌铝混合粉的析氢,包覆工艺最佳水硅比为10:1;SiO_2膜与Al粉间存在Si-O-Al的化学键作用.In order to inhibit the hydrogen evolution of powder mixture of Zn and Al in waterborne environment due to galvanic corrosion,in this paper,the flake Al powder was coated by SiO_2 to decrease the contact possibilty of Al particles with Zn particles,so that to suppress the galvanic corrosion between them.SEM and XPS were used to characterize the SiO_2 coated Al powder.The hydrogen evolution of the powder mixture of SiO_2 coated Al and Zn was investigated.The results showed that hydrogen evolution of the mixture of flake Zn and Al powder was efficiently inhibited by replacing Al by SiO_2 coated Al,the optimum n（H_2O）/n（SiO_2） was 10 for preparation of the SiO_2 coated Al.There existed chemical bond of Al-O-Si between Al surface and SiO_2 film.

关 键 词：SiO2包覆 片状Al粉 析氢 水硅比 

分 类 号：TG174[金属学及工艺—金属表面处理]