高强度 7068 铝合金在含氯化物的硼酸盐缓冲溶液中的钝性破坏

IF 2.6 4区化学 Q3 ELECTROCHEMISTRY

Journal of Solid State Electrochemistry Pub Date : 2024-07-17 DOI:10.1007/s10008-024-06010-5

Ankur Kumar, Gajanan P. Chaudhari

{"title":"高强度 7068 铝合金在含氯化物的硼酸盐缓冲溶液中的钝性破坏","authors":"Ankur Kumar, Gajanan P. Chaudhari","doi":"10.1007/s10008-024-06010-5","DOIUrl":null,"url":null,"abstract":"Passivity breakdown mechanism of high-strength 7068 alloy is studied. Breakdown potential varied linearly with log aCl‒, pH, and square root of scan rate in potentiodynamic polarization tests. Mott-Schottky analysis showed that the dominant defect is cation vacancy. Passive layer characteristics like cation vacancy density and defect annihilation rate are determined. Critical cation vacancy density for pitting obtained from point defect model and the theoretical values are somewhat compatible. Chloride concentration of 0.01 M is too dilute to cause severe localized corrosion, whereas beyond 0.5 M, saturation is achieved in terms of breakdown potential and the cation vacancy density.\n","PeriodicalId":665,"journal":{"name":"Journal of Solid State Electrochemistry","volume":null,"pages":null},"PeriodicalIF":2.6000,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Passivity breakdown of high-strength 7068 aluminum alloy in borate buffer solutions containing chlorides\",\"authors\":\"Ankur Kumar, Gajanan P. Chaudhari\",\"doi\":\"10.1007/s10008-024-06010-5\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Passivity breakdown mechanism of high-strength 7068 alloy is studied. Breakdown potential varied linearly with log aCl‒, pH, and square root of scan rate in potentiodynamic polarization tests. Mott-Schottky analysis showed that the dominant defect is cation vacancy. Passive layer characteristics like cation vacancy density and defect annihilation rate are determined. Critical cation vacancy density for pitting obtained from point defect model and the theoretical values are somewhat compatible. Chloride concentration of 0.01 M is too dilute to cause severe localized corrosion, whereas beyond 0.5 M, saturation is achieved in terms of breakdown potential and the cation vacancy density.\\n\",\"PeriodicalId\":665,\"journal\":{\"name\":\"Journal of Solid State Electrochemistry\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":2.6000,\"publicationDate\":\"2024-07-17\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Solid State Electrochemistry\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://doi.org/10.1007/s10008-024-06010-5\",\"RegionNum\":4,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"ELECTROCHEMISTRY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Solid State Electrochemistry","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1007/s10008-024-06010-5","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ELECTROCHEMISTRY","Score":null,"Total":0}

引用次数: 0

摘要

研究了高强度 7068 合金的钝化击穿机理。在电位极化测试中，击穿电位与对数 aCl-、pH 值和扫描速率的平方根呈线性变化。莫特-肖特基分析表明，主要缺陷是阳离子空位。确定了阳离子空位密度和缺陷湮灭率等被动层特征。根据点缺陷模型得出的点蚀临界阳离子空位密度与理论值基本吻合。氯化物浓度为 0.01 M 时，由于过于稀释而导致严重的局部腐蚀，而超过 0.5 M 时，就击穿电位和阳离子空位密度而言，则达到了饱和状态。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Passivity breakdown of high-strength 7068 aluminum alloy in borate buffer solutions containing chlorides

查看原文本刊更多论文

Passivity breakdown of high-strength 7068 aluminum alloy in borate buffer solutions containing chlorides

Passivity breakdown mechanism of high-strength 7068 alloy is studied. Breakdown potential varied linearly with log a_Cl^‒, pH, and square root of scan rate in potentiodynamic polarization tests. Mott-Schottky analysis showed that the dominant defect is cation vacancy. Passive layer characteristics like cation vacancy density and defect annihilation rate are determined. Critical cation vacancy density for pitting obtained from point defect model and the theoretical values are somewhat compatible. Chloride concentration of 0.01 M is too dilute to cause severe localized corrosion, whereas beyond 0.5 M, saturation is achieved in terms of breakdown potential and the cation vacancy density.

求助全文

通过发布文献求助，成功后即可免费获取论文全文。去求助

来源期刊

Journal of Solid State Electrochemistry 工程技术-电化学

CiteScore

4.80

自引率

4.00%

发文量

227

审稿时长

4.1 months

期刊介绍： The Journal of Solid State Electrochemistry is devoted to all aspects of solid-state chemistry and solid-state physics in electrochemistry. The Journal of Solid State Electrochemistry publishes papers on all aspects of electrochemistry of solid compounds, including experimental and theoretical, basic and applied work. It equally publishes papers on the thermodynamics and kinetics of electrochemical reactions if at least one actively participating phase is solid. Also of interest are articles on the transport of ions and electrons in solids whenever these processes are relevant to electrochemical reactions and on the use of solid-state electrochemical reactions in the analysis of solids and their surfaces. The journal covers solid-state electrochemistry and focusses on the following fields: mechanisms of solid-state electrochemical reactions, semiconductor electrochemistry, electrochemical batteries, accumulators and fuel cells, electrochemical mineral leaching, galvanic metal plating, electrochemical potential memory devices, solid-state electrochemical sensors, ion and electron transport in solid materials and polymers, electrocatalysis, photoelectrochemistry, corrosion of solid materials, solid-state electroanalysis, electrochemical machining of materials, electrochromism and electrochromic devices, new electrochemical solid-state synthesis. The Journal of Solid State Electrochemistry makes the professional in research and industry aware of this swift progress and its importance for future developments and success in the above-mentioned fields.