摘要
为了提高AZ91D镁合金的耐腐蚀性能和表面硬度 ,对其进行了表面热处理扩散渗锌处理 ,并对其得到的膜层表面和断面形貌、结构组成、耐腐蚀性能、显微硬度等性能进行了探讨 ,测量了该合金热扩散渗锌前后试样的阳极极化曲线和交流阻抗图 ,这些试验结果都表明在AZ91D镁合金材料表面进行热扩散渗锌获得的表面膜层均匀细致 ,膜层由Mg7Zn3 、Mg和Zn构成 ,而且该膜层与基体相比耐腐蚀性和对镁合金基体的防护性能有了显著提高 。
In order to improve the corrosion resistance and micro-hardness of AZ91D magnesium alloys, its surface was treated by zinc alloys. The characterization of the above-prepared coating on AZ91D magnesium alloys was studied, and its surface image, cross-section image, XRD image, corrosion resistance ability and micro-hardness were also researched. The anodic polarization curve and electrochemical impedance spectrum of the coating on AZ91D magnesium alloys were examined before and after the samples being zinc alloyed. All results show that the zinc alloyed coating on AZ91D magnesium alloys is uniform and fine, and it is made up of Mg7Zn3, Mg and Zn. This coating has better corrosion resistance and good protective characterization than the magnesium alloys, and it has relatively higher micro-hardness than the magnesium alloys.
出处
《北京航空航天大学学报》
EI
CAS
CSCD
北大核心
2005年第1期8-12,共5页
Journal of Beijing University of Aeronautics and Astronautics
基金
国家 8 63资助项目 ( 2 0 0 3AA3 0 5 0 71)
关键词
镁合金
耐蚀性
热扩散渗锌膜层
Anodic polarization
Coatings
Corrosion resistance
Microhardness
Zinc alloys
