Regulating corrosion resistance of Mg alloys via promoting precipitation with trace Zr alloying
Regulating corrosion resistance of Mg alloys via promoting precipitation with trace Zr alloying
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DOI：
10.1016/j.corsci.2023.111106
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发表时间：
2023-03-15
影响因子：
8.3
通讯作者：
Zeng, Xiaoqin
中科院分区：
文献类型：
--
作者：
Chen, Yuyang;Ying, Tao;Zeng, Xiaoqin
镁合金腐蚀性能差一直是制约其应用的瓶颈问题。本文提出了一种通过微合金化Zr来提高MgNd合金耐腐蚀性能的新方法，该方法可以促进析出过程快速形成保护腐蚀层。腐蚀速率从32.69 mL/cm 2/天降低到0.072 mL/cm 2/天，降低了三个数量级。结果表明，Zr在Mg表面易形成纳米尺度的氧化物团簇，作为预沉淀位加速了Mg的沉淀，有利于形成致密致密的腐蚀层。
Poor corrosion property has been a bottleneck problem during the application of Mg alloys. This work proposes a new way to improve the corrosion resistance of MgNd alloy by micro-alloying Zr, which promotes the precipitation process to rapidly form a protective corrosion layer. The corrosion rate decreases by three orders of magnitude from 32.69 mL/cm2/day to 0.072 mL/cm2/day. The results show Zr tends to form nano-scale oxide clusters on Mg surface, acting as pre-precipitation sites to accelerate the precipitation and facilitate the formation of dense and compact corrosion layer.