Kai-xuan FENG , Tao LAI , Yang CHEN , Zheng YIN , Zhi-qin WU , Hong YAN , Hong-gun SONG , Chao LUO , Zhi HU
{"title":"镁-(7,9)铝-1Fe-xNd 合金的微电镀腐蚀行为","authors":"Kai-xuan FENG , Tao LAI , Yang CHEN , Zheng YIN , Zhi-qin WU , Hong YAN , Hong-gun SONG , Chao LUO , Zhi HU","doi":"10.1016/S1003-6326(24)66579-9","DOIUrl":null,"url":null,"abstract":"<div><div>The localized micro-galvanic corrosion process and the kinetic information of Mg−(7,9)Al−1Fe−<em>x</em>Nd alloys were investigated by in situ observation under electrochemical control and in situ atomic force microscopy (AFM) in an electrolyte environment. The results revealed that the formation of the Nd-rich phase in alloys resulted in a decrease in the Volta potential difference from ~400 mV (AlFe<sub>3</sub>/<em>α</em>-Mg) to ~220 mV (Nd-rich/<em>α</em>-Mg), reducing the corrosion products around the cathodic phase and corrosion current density of the microscale area. The addition of Nd significantly improved the corrosion resistance, mainly due to the suppression of the micro-galvanic corrosion between the second phases and substrate. Finally, the corrosion mechanism of Mg−(7,9)Al−1Fe−<em>x</em>Nd alloys was discussed based on in situ observations and electrochemical results.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"34 9","pages":"Pages 2828-2848"},"PeriodicalIF":4.7000,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Micro-galvanic corrosion behaviour of Mg−(7,9)Al−1Fe−xNd alloys\",\"authors\":\"Kai-xuan FENG , Tao LAI , Yang CHEN , Zheng YIN , Zhi-qin WU , Hong YAN , Hong-gun SONG , Chao LUO , Zhi HU\",\"doi\":\"10.1016/S1003-6326(24)66579-9\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>The localized micro-galvanic corrosion process and the kinetic information of Mg−(7,9)Al−1Fe−<em>x</em>Nd alloys were investigated by in situ observation under electrochemical control and in situ atomic force microscopy (AFM) in an electrolyte environment. The results revealed that the formation of the Nd-rich phase in alloys resulted in a decrease in the Volta potential difference from ~400 mV (AlFe<sub>3</sub>/<em>α</em>-Mg) to ~220 mV (Nd-rich/<em>α</em>-Mg), reducing the corrosion products around the cathodic phase and corrosion current density of the microscale area. The addition of Nd significantly improved the corrosion resistance, mainly due to the suppression of the micro-galvanic corrosion between the second phases and substrate. Finally, the corrosion mechanism of Mg−(7,9)Al−1Fe−<em>x</em>Nd alloys was discussed based on in situ observations and electrochemical results.</div></div>\",\"PeriodicalId\":23191,\"journal\":{\"name\":\"Transactions of Nonferrous Metals Society of China\",\"volume\":\"34 9\",\"pages\":\"Pages 2828-2848\"},\"PeriodicalIF\":4.7000,\"publicationDate\":\"2024-09-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Transactions of Nonferrous Metals Society of China\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1003632624665799\",\"RegionNum\":1,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"METALLURGY & METALLURGICAL ENGINEERING\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Transactions of Nonferrous Metals Society of China","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1003632624665799","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"METALLURGY & METALLURGICAL ENGINEERING","Score":null,"Total":0}
Micro-galvanic corrosion behaviour of Mg−(7,9)Al−1Fe−xNd alloys
The localized micro-galvanic corrosion process and the kinetic information of Mg−(7,9)Al−1Fe−xNd alloys were investigated by in situ observation under electrochemical control and in situ atomic force microscopy (AFM) in an electrolyte environment. The results revealed that the formation of the Nd-rich phase in alloys resulted in a decrease in the Volta potential difference from ~400 mV (AlFe3/α-Mg) to ~220 mV (Nd-rich/α-Mg), reducing the corrosion products around the cathodic phase and corrosion current density of the microscale area. The addition of Nd significantly improved the corrosion resistance, mainly due to the suppression of the micro-galvanic corrosion between the second phases and substrate. Finally, the corrosion mechanism of Mg−(7,9)Al−1Fe−xNd alloys was discussed based on in situ observations and electrochemical results.
期刊介绍：
The Transactions of Nonferrous Metals Society of China (Trans. Nonferrous Met. Soc. China), founded in 1991 and sponsored by The Nonferrous Metals Society of China, is published monthly now and mainly contains reports of original research which reflect the new progresses in the field of nonferrous metals science and technology, including mineral processing, extraction metallurgy, metallic materials and heat treatments, metal working, physical metallurgy, powder metallurgy, with the emphasis on fundamental science. It is the unique preeminent publication in English for scientists, engineers, under/post-graduates on the field of nonferrous metals industry. This journal is covered by many famous abstract/index systems and databases such as SCI Expanded, Ei Compendex Plus, INSPEC, CA, METADEX, AJ and JICST.
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