Effect of yttrium on corrosion behavior of extruded AZ61 Mg alloy

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• 作者：Li Li^a ; ^b ; ^{lileewin@163.com" class="auth_mail" title="E-mail the corresponding author} ; Nguyen Dang Nam^b
• 关键词：Magnesium alloy ; Polarization ; Alkaline corrosion ; Pitting corrosion
• 刊名：Journal of Magnesium and Alloys
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：4
• 期：1
• 页码：44-51
• 全文大小：2248 K

文摘

The corrosion behavior of extruded AZ61 magnesium alloy with different addition of yttrium ranging from 0 to 0.9 wt. % was investigated. The electrochemical techniques in naturally-aerated 0.01 M NaCl solution and the surface analyses are utilized. The electrochemical results show that the pitting potential, time to pitting initiation, film and charge transfer resistances of the AZ61 specimens increased with the increase of yttrium content. Surface analyses indicate that yttrium promotes the formation of passive films and the refinement of the precipitates and matrix grains.