Cold-Sprayed Al Coating for Corrosion Protection of Sintered NdFeB

被引：34
作者：
Ma, Chunchun [1 ]
Liu, Xiaofang [1 ]
Zhou, Chungen [1 ]
机构：
[1] Beijing Univ Aeronaut & Astronaut, Sch Mat Sci & Engn, Beijing 100191, Peoples R China
来源：
JOURNAL OF THERMAL SPRAY TECHNOLOGY | 2014年 / 23卷 / 03期
基金：
国家高技术研究发展计划(863计划);
关键词：
cold spray; EIS; metal coatings; passive films; pitting corrosion; FE-B MAGNETS; COMPOSITE COATINGS; MAGNESIUM ALLOY; ND; RESISTANCE; ALUMINUM; BEHAVIOR;
D O I：
10.1007/s11666-013-9994-8
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A protective Al coating was achieved on the sintered NdFeB magnet by cold spray. The sprayed Al particles generate plastic deformation and hang together. The thickness of the coating is about 170 mu m. The corrosion currents of Al coating and NdFeB without immersion tested by potentiodynamic polarization in 3.5 wt.% NaCl solutions are 1.350 x 10(-6) and 4.361 x 10(-6) A/cm(2), respectively. X-ray photoelectron spectrometry results confirm that the oxide film is Al2O3 and the corrosion process can be derived into two different stages. The Al coating can provide long-term protection for NdFeB effectively.
引用
收藏
页码：456 / 462
页数：7
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