首页|Improvement in corrosion resistance of Mg97Zn1Y2 alloy by Zr addition
Improvement in corrosion resistance of Mg97Zn1Y2 alloy by Zr addition
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Improvement in corrosion resistance of Mg97Zn1Y2 alloy by Zr addition
Magnesium alloys,known for their exceptional lightweight properties,have presented challenges in various applications due to their limited corrosion resistance.In this study,the corrosion resistance of Mg97Zn1Y2 magnesium alloys was enhanced by incorporating Zr elements into the Mg97Zn1Y2 matrix,which is distinguished by long periodic stacking ordered(LPSO)phases.Results show that Mg97Zn1Y2-xwt.％Zr(x=0,0.1,0.3,0.6)alloys containing Zr exhibit reduced hydrogen evolution rates and decreased corrosion levels compared with that without Zr,when immersed in a 3.5wt.％NaCl solution.Addition of 0.3wt.％Zr results in the most significant improvement,with a corrosion rate as low as 2.261 mL·cm-2,representing an 86％reduction from 16.438 mL·cm-2 of the base alloy.Furthermore,alloys with Zr additions demonstrate a more positive corrosion potential and lower corrosion current density than does the matrix alloy(64.92 μA·cm-2).The lowest corrosion current density,21.61 μA·cm-2,occurs with the addition of 0.3wt.％Zr.The introduction of Zr induces a change in the microstructure of the LPSO phases,increasing the charge transfer resistance within the alloy and thus effectively improving its corrosion resistance.
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