Cu对热轧Mg-3Zn-1Y合金微观组织和腐蚀行为的影响

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中文摘要：研究了热轧Mg-3Zn-1Y-xCu合金(x=0、1、3、5,质量分数)的微观组织和腐蚀行为.结果表明,Mg-3Zn-1Y-xCu合金主要包含了 α-Mg和Mg3Zn6Y相.添加Cu元素后,合金出现了 MgZnCu相,并且MgZnCu相的含量随着Cu含量的增加而增加.电化学和浸泡试验结果表明,添加Cu后Mg-3Zn-1Y-xCu合金的耐腐蚀性能下降,这是因为受到了合金微观组织和腐蚀产物膜性能的影响.具有高电化学电势的MgZnCu相作为强阴极加速了微电偶腐蚀.腐蚀产物膜防护性能的下降源于相应化合物PBR值的改变.

外文标题：Effects of Cu on Microstructure and Corrosion Behaviour of Hot-Rolled Mg-3Zn-1Y Alloys

外文摘要：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-lY-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 film results from the variation in PBR value of the related compounds.

外文关键词：

corrosion behaviourmagnesium alloymicrostructureMgZnCu phasecorrosion product

作者：

张跃忠、陈小亭、沈静、武鹏鹏、张少华、刘宝胜

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作者单位：

太原科技大学化学工程与技术学院,山西太原 030024

太原科技大学材料科学与工程学院,山西太原 030024

关键词：

腐蚀行为镁合金微观组织 MgZnCu相腐蚀产物

基金：

Fundamental Research Program of Shanxi ProvinceFundamental Research Program of Shanxi ProvinceCentral Guiding Science and Technology Development of Local FundKey Scientific Research Project in Shanxi ProvinceKey Scientific Research Project in Shanxi Province

项目编号：

202203021222188202303021211166YDZJSK20231A046202102050201003202203D111001

出版年：

2024

DOI：

10.12442/j.issn.1002-185X.20240299

稀有金属材料与工程

中国有色金属学会,中国材料研究学会,西北有色金属研究院

稀有金属材料与工程

CSTPCD北大核心

影响因子：0.634

ISSN：1002-185X

年,卷(期)：2024.53(10)