Chaoneng Dai , Zhangkang An , Shengfeng Guo , Jingfeng Wang
{"title":"A new strategy for enhancement of the degradation rate of Mg-Er-Ni alloys by introducing lamellar γ´-functional strengthening phase","authors":"Chaoneng Dai , Zhangkang An , Shengfeng Guo , Jingfeng Wang","doi":"10.1016/j.corsci.2025.112876","DOIUrl":null,"url":null,"abstract":"<div><div>The microstructure, corrosion behavior, and mechanism of Mg-Er-Ni alloys with LPSO and Mg₂Ni eutectic phases are investigated, focusing on the effects of γ' phase introduction before and after low-temperature heat treatment. After heat treatment, the corrosion rate increases by 6.1–37.7 %, primarily due to the formation of new galvanic corrosion pairs caused by the high potential of the γ' phase, which also promotes corrosion propagation. Moreover, alloys with discontinuous intergranular LPSO and a high number density of intracrystalline lamellar γ' phases exhibit excellent degradation properties. This provides new insight for designing as-cast Mg alloys for fracturing tool with higher strength and faster degradation.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"250 ","pages":"Article 112876"},"PeriodicalIF":7.4000,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Corrosion Science","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0010938X25002033","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/3/19 0:00:00","PubModel":"Epub","JCR":"Q1","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
The microstructure, corrosion behavior, and mechanism of Mg-Er-Ni alloys with LPSO and Mg₂Ni eutectic phases are investigated, focusing on the effects of γ' phase introduction before and after low-temperature heat treatment. After heat treatment, the corrosion rate increases by 6.1–37.7 %, primarily due to the formation of new galvanic corrosion pairs caused by the high potential of the γ' phase, which also promotes corrosion propagation. Moreover, alloys with discontinuous intergranular LPSO and a high number density of intracrystalline lamellar γ' phases exhibit excellent degradation properties. This provides new insight for designing as-cast Mg alloys for fracturing tool with higher strength and faster degradation.
期刊介绍：
Corrosion occurrence and its practical control encompass a vast array of scientific knowledge. Corrosion Science endeavors to serve as the conduit for the exchange of ideas, developments, and research across all facets of this field, encompassing both metallic and non-metallic corrosion. The scope of this international journal is broad and inclusive. Published papers span from highly theoretical inquiries to essentially practical applications, covering diverse areas such as high-temperature oxidation, passivity, anodic oxidation, biochemical corrosion, stress corrosion cracking, and corrosion control mechanisms and methodologies.
This journal publishes original papers and critical reviews across the spectrum of pure and applied corrosion, material degradation, and surface science and engineering. It serves as a crucial link connecting metallurgists, materials scientists, and researchers investigating corrosion and degradation phenomena. Join us in advancing knowledge and understanding in the vital field of corrosion science.
京公网安备 11010802042870号
京ICP备2023020795号-1
分享
求助内容：
应助结果提醒方式：
扫码关注我们
