Relationship between heat treatment and corrosion behaviour of Mg-3.0％Nd-0.4％Zr magnesium alloy

摘要：

The corrosion behaviour of Mg-3.0Nd-0.4Zr (NK30) magnesium alloy was investigated in as-cast (F),solution treated (T4) and peak-aged (T6) conditions in 5％ NaCl solution by immersion tests and electrochemical measurements.The results of immersion test show that NK30 alloy exhibits better corrosion resistance in F condition than it does in the other two conditions due to the more compact corrosion film formed on alloy in F condition.The potentiodynamic polarization curves show that the overpotential of cathodic hydrogen evolution reaction on NK30-F is much higher than that on NK30-T4 and NK30-T6.The corrosion potentials of NK30 increase in the following order: F＜T4＜T6.The results of electrochemical impedance spectroscopy (EIS) also confirm that the corrosion film of NK30-F plays a more protective role than that of NK30-T4 and NK30-T6.

关键词： Mg-Nd-Zr alloy corrosion behaviour heat treatment potentiodynamic polarization electrochemical impedance spectroscopy

作者: CHANG Jian-wei GUO Xing-wu FU Peng-huai PENG Li-ming DING Wen-jiang

作者单位: National Engineering Research Center of Light Alloys Net Forming,School of Materials Science and Engineering,Shanghai Jiao Tong University,Shanghai 200030,China

会议类型: 国际会议

会议名称: 2007年国际有色金属大会(International Conference of Nonfereous Materials 2007)(ICNFM)

会议地点: 长沙

会议语种:英文

在线出版日期: 2007-11-28（万方平台首次上网日期，不代表论文的发表时间）