摘要
利用Mg-30%Nd(质量分数)中间合金对Mg-6Zn-Mn(ZM61)合金进行了变质处理。通过显微组织观察、物相分析、动电位极化测试和浸泡实验研究了Nd含量对ZM61镁合金组织及腐蚀性能(3.5%Na Cl溶液中)的影响。结果表明,稀土Nd能够细化ZM61合金组织,提高其耐腐蚀性能。Nd含量增加,新生成的第二相在晶界处呈半连续网状分布。稀土Nd添加量达到1.5%时,合金的腐蚀电位比ZM61合金提高256m V,腐蚀电流密度降低为3.678×10-6A/cm2,腐蚀速率降低50%,耐腐蚀性最好。
TheMg-6Zn-Mn （ZM61） magnesium alloy was modified by the Mg-30%Nd （mass fraction） interalloy. The effect of the Nd content on microstructure and corrosion properties （ in 3.5%NaCl solution） of ZM61 magnesium alloy were investigated by microstructure observation, phase analysis, potentiodynamic polarization test and immersion test. The results indicate that the microstructure of ZM61 magnesium alloy can be refined by rare earth Nd, and its corrosion resistance can be increased. When rare earth Nd reaches 1.5%, the corrosion potential of the alloy has increased by 256 mV as compared with that of ZM61 alloy, the corrosion current density has decreased to 3.678×10^-6A/cm^2, the corrosion rate has decreased by 50%, and the corrosion resistance is maximum.
出处
《热加工工艺》
CSCD
北大核心
2015年第7期55-59,共5页
Hot Working Technology
基金
南京航空航天大学基本科研业务费NSFC培育基金资助项目(NN2012040)
关键词
ZM61
镁合金
稀土
ND
腐蚀性能
极化曲线
浸泡实验
ZM61 magnesium alloy
rare earth elements Nd
corrosion properties
polarization curve
immersion test
