Journal
ACTA METALLURGICA SINICA-ENGLISH LETTERS
Volume 32, Issue 2, Pages 218-226Publisher
CHINESE ACAD SCIENCES, INST METAL RESEARCH
DOI: 10.1007/s40195-018-0798-1
Keywords
High-current pulsed electron beam (HCPEB); Corrosion resistance; Electrochemical impedance spectroscopy (EIS); AZ91 Mg alloy; Microstructure
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Funding
- National Natural Science Foundation of China [51771128, 51771129]
- Projects of International Cooperation in Shanxi [201703D421039]
- Natural Science Foundation of Shanxi [201601D011034]
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The high-current pulsed electron beam (HCPEB) treatment with current density 6 J/cm(2) was applied on AZ91 Mg alloy to improve its corrosion resistance. Results showed that the net-like Mg17Al12 disappeared on the surface of AZ91 Mg alloy after irradiation by HCPEB, which was instead of supersaturated Al element on the surface. Nevertheless, the application of HCPEB also led to the formation of crater-like and groove-like structures as well as micro-cracks on the surface of AZ91 Mg alloy. After HCPEB treatment by 3, 5 and 10 pulses, the AZ91 Mg alloy exhibited better corrosion resistance. However, the increasing amount of micro-cracks reduced the anti-corrosive properties of AZ91 Mg alloy as the pulse increased to 20 and 30.
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