3Zn6Y相。添加Cu元素后，合金出現(xiàn)了MgZnCu相，并且MgZnCu相的含量隨著Cu含量的增加而增加。電化學(xué)和浸泡試驗結(jié)果表明，添加Cu后Mg-3Zn-1Y-xCu合金的耐腐蝕性能下降，這是因為受到了合金微觀組織和腐蝕產(chǎn)物膜性能的影響。具有高電化學(xué)電勢的MgZnCu相作為強(qiáng)陰極加速了微電偶腐蝕。腐蝕產(chǎn)物膜防護(hù)性能的下降源于相應(yīng)化合物PBR值的改變。"/>

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Cu對熱軋Mg-3Zn-1Y合金微觀組織和腐蝕行為的影響
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1.太原科技大學(xué) 化學(xué)工程與技術(shù)學(xué)院，山西 太原 030024;2.太原科技大學(xué) 材料科學(xué)與工程學(xué)院，山西 太原 030024

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山西省基礎(chǔ)研究計劃 ( 202203021222188 、 202303021211166), 中央引導(dǎo)地方科技發(fā)展基金 (YDZJSK20231A046), 山西省重點研究項目 ( 202102050201003 、202203D111001).


Effects of Cu on Microstructure and Corrosion Behaviour of Hot-Rolled Mg-3Zn-1Y Alloys
Author:
Affiliation:

1.College of Chemical Engineering and Technology, Taiyuan University of Science and Technology, Taiyuan 030024, China;2.College of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China

Fund Project:

Fundamental Research Program of Shanxi Province (202203021222188, 202303021211166); Central Guiding Science and Technology Development of Local Fund (YDZJSK20231A046); Key Scientific Research Project in Shanxi Province (202102050201003, 202203D111001)

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    摘要:

    研究了熱軋Mg-3Zn-1Y-xCu合金（x=0、1、3、5，質(zhì)量分?jǐn)?shù)）的微觀組織和腐蝕行為。結(jié)果表明，Mg-3Zn-1Y-xCu合金主要包含了α-Mg和Mg3Zn6Y相。添加Cu元素后，合金出現(xiàn)了MgZnCu相，并且MgZnCu相的含量隨著Cu含量的增加而增加。電化學(xué)和浸泡試驗結(jié)果表明，添加Cu后Mg-3Zn-1Y-xCu合金的耐腐蝕性能下降，這是因為受到了合金微觀組織和腐蝕產(chǎn)物膜性能的影響。具有高電化學(xué)電勢的MgZnCu相作為強(qiáng)陰極加速了微電偶腐蝕。腐蝕產(chǎn)物膜防護(hù)性能的下降源于相應(yīng)化合物PBR值的改變。

    Abstract:

    The microstructure and corrosion behaviour of hot-rolled Mg-3Zn-1Y-xCu alloys (x=0, 1, 3, 5, wt%) were investigated. Results show that all Mg-3Zn-1Y-xCu alloys mainly consist of α-Mg matrix and Mg3Zn6Y phases. The addition of Cu element promotes the formation of MgZnCu phase, and the amount of MgZnCu phase is increased with the increase in Cu content. Electrochemical and immersion test results show that the corrosion resistance of Mg-3Zn-1Y-xCu alloys is deteriorated after Cu addition, which can be attributed to the influence of the microstructure of alloys and the properties of the formed corrosion product film. The MgZnCu phase with high electrochemical potential accelerates the micro-galvanic corrosion as strong cathodic sites, and the decreased protection effect of the corrosion product ?lm results from the variation in PBR value of the related compounds.

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張躍忠,陳小亭,沈靜,武鵬鵬,張少華,劉寶勝.Cu對熱軋Mg-3Zn-1Y合金微觀組織和腐蝕行為的影響[J].稀有金屬材料與工程,2024,53(10):2794~2804.[Zhang Yuezhong, Chen Xiaoting, Shen Jing, Wu Pengpeng, Zhang Shaohua, Liu Baosheng. Effects of Cu on Microstructure and Corrosion Behaviour of Hot-Rolled Mg-3Zn-1Y Alloys[J]. Rare Metal Materials and Engineering,2024,53(10):2794~2804.]
DOI：10.12442/j. issn.1002-185X.20240299

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  • 收稿日期:2024-05-17
  • 最后修改日期:2024-06-07
  • 錄用日期:2024-06-14
  • 在線發(fā)布日期: 2024-09-27
  • 出版日期: 2024-09-27