超轻多孔金属的耐腐蚀性能  

Corrosion resistance of ultra-light porous metals

作　　者：张勇明[1] 何思渊[1] 何德坪[1] 卢天健[2] 王辉[1] 黄可[1] 

机构地区：[1]东南大学材料科学与工程学院,南京210096 [2]西安交通大学航天航空学院,西安710049

出　　处：《中国有色金属学报》2007年第11期1808-1813,共6页The Chinese Journal of Nonferrous Metals

基　　金：国家重点基础研究发展计划资助项目(2006CB601201);国家自然科学基金重点资助项目(50231010);国家自然科学基金资助项目(50471031)

摘　　要：研究闭孔泡沫铝的孔结构、基体对耐蚀性能的影响,探讨提高耐腐蚀性能的途径。结果表明:其耐蚀性远低于实体金属,在孔径相近情况下,随孔隙率的增大,表面积增大,使耐腐蚀性能下降;Al-Mg-Re基防锈泡沫铝具有优异的耐腐蚀性能;添加适量稀土元素可以提高耐腐蚀性能。提高泡沫铝耐腐蚀性能的途径为:降低小孔径泡沫铝的孔隙率;采用防锈泡沫铝和添加适量稀土元素;对泡沫铝进行喷漆处理或阳极氧化、化学转化处理等。The effects of the pore structure and the component of the matrix of closed-cell foamed aluminum on its corrosion resistance were studied. The results indicate that the corrosion resistance of foamed aluminum is worse than that of compact aluminum and coarsened remarkably with the increase of the porosity in the average diameter stated; The foamed Al-Mg-Re alloy has excellent corrosion resistance compared with other foamed aluminum; The corrosion resistance can be improved by adding rare earth into aluminum and aluminum alloys. The feasible approaches to improve the corrosion resistance were also discussed.

关 键 词：闭孔泡沫铝 耐腐蚀性 防锈泡沫铝 

分 类 号：TG146[一般工业技术—材料科学与工程]