Preparation of Al-based Amorphous/Nanocrystalline Composite Coating on Mg-based Alloys Precipitated by Arc Spraying Process
The Al-based amorphous and nanocrystalline composite coatings with the composition of Al-Ni-Y-Co and AlNi-Mm-Fe were prepared on AZ91 Mg-based alloys by high velocity arc spraying technique (HVAS). The structure character of the coatings indicates that coatings contain the mixture of amorphous phases and crystalline and there are both less than 2％ porosity. The electrochemical tests of the coatings and the substrate were studied. The coatings show the passivation ability during polarization, but AZ91 Mgbased alloys show little passivation. The corrosion current density of the coatings is lower than that of AZ91 Mg-based alloys. The results show that the coatings have an excellent corrosion resistance for AZ91 Mg-based alloys in 5 wt％ NaCl solution.
high velocity arc spraying microstructure amorphous and nanocrystalline Mg-based alloy corrosion resistance
Zhang Zhibin Liang Xiubing Xu Binshi
State Key Laboratory for Remanufacturing, Academy of Armored Forces Engineering, Beijing 100072, Chi State Key Laboratory for Remanufacturing, Academy of Armored Forces Engineering, Beijing 100072, Chi
国际会议
西安
英文
439-442
2011-05-11（万方平台首次上网日期，不代表论文的发表时间）