Purpose

The effect of zirconium, zinc, calcium and rare earth group as the alloying elements on mechanical properties and corrosion behavior of magnesium alloys was investigated in the simulated body fluid.

Design/methodology/approach

Pure magnesium and the alloying elements were melted and zirconium was finally added to obtain different alloys. The castings were annealed and some samples were aged heat treated. X-ray fluorescence was used for the elemental analysis and LSV was used for electrochemical corrosion evaluations.

Findings

Results showed that corrosion resistance decreases with increasing zirconium content. The lowest corrosion rate was obtained for the samples containing 0.3% and 0.45% of Zr from annealed and aging heat-treated samples, respectively. Yield stress enhances with increasing the zirconium content and degrades by the aging heat treatment.

Originality/value

These alloys were studied for the first time. Effect of casting without using protective flux and vacuum furnaces. Effect of annealing at 440°C for 2 h and artificial aging at 200°C for 16 h. Alloy’s electrochemical behavior on the body’s simulation environment has been investigated. Improvement of mechanical properties after annealing heat treatment by high zirconium percentage.

中文翻译：

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锆对Mg-3Zn-1Ca-1RE合金电化学和力学性能的影响

目的

在模拟体液中研究了锆，锌，钙和稀土基作为合金元素对镁合金力学性能和腐蚀行为的影响。

设计/方法/方法

将纯镁和合金元素熔化，最后添加锆，以获得不同的合金。对铸件进行退火，并对一些样品进行时效热处理。X射线荧光用于元素分析，LSV用于电化学腐蚀评估。

发现

结果表明，耐腐蚀性随锆含量的增加而降低。分别从退火和时效热处理的样品中获得的Zr含量为0.3％和0.45％的样品，其腐蚀速率最低。屈服应力随着锆含量的增加而增加，并通过时效热处理而降低。

创意/价值

这些合金是第一次研究。不使用保护性助熔剂和真空炉的铸造效果。在440°C退火2小时和在200°C人工老化16小时的效果。已经研究了合金在人体模拟环境下的电化学行为。通过高锆含量提高退火热处理后的机械性能。