{"title":"不同形状镍/铬粉末的协同钝化效应增强铝基涂层的抗点蚀性能","authors":"Binkai Yuan, Liuyan Zhang, Zhaokang Han, Luliang Mo, Yiying Zhang, Gengzhe Shen, Qian Lin, Guibin Tan","doi":"10.1007/s10008-024-06058-3","DOIUrl":null,"url":null,"abstract":"<p>Cold-sprayed Al-based coatings are widely used in corrosion protection fields, but they are poor in pitting resistance. In order to enhance the pitting resistance of Al-based coatings, dendritic Ni and irregular Cr powders are co-doped into Al powders to prepare Al-Ni–Cr composite coatings by cold spraying. Their structure, composition, and corrosion behavior are characterized by optical microscopy, scanning electron microscopy (SEM), X-ray diffraction (XRD), dynamic potential polarization, and electrochemical impedance spectroscopy. The results show that the Al-Ni-30Cr coating exhibits the best corrosion resistance with high <i>E</i><sub>pit</sub>, small <i>i</i><sub>corr</sub> and <i>i</i><sub>pass</sub>, large <i>R</i><sub>ct</sub>, and superior self-healing ability. The protective corrosion products rapidly form in the early stage of corrosion, which can effectively fill corrosion pits and intrinsic pores in coatings, preventing further penetration of corrosive media and the continuation of auto-catalytic corrosion reaction of Cl<sup>−</sup> in the pits. The excellent anti-corrosion performance and long service life of the Al-Ni-30Cr coating are attributed to the self-healing ability and the synergistic shielding effect of nickel and chromium.</p>","PeriodicalId":665,"journal":{"name":"Journal of Solid State Electrochemistry","volume":null,"pages":null},"PeriodicalIF":2.6000,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Enhanced pitting resistance of Al-based coating by synergistic passivation effect from different shapes of Ni/Cr powders\",\"authors\":\"Binkai Yuan, Liuyan Zhang, Zhaokang Han, Luliang Mo, Yiying Zhang, Gengzhe Shen, Qian Lin, Guibin Tan\",\"doi\":\"10.1007/s10008-024-06058-3\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>Cold-sprayed Al-based coatings are widely used in corrosion protection fields, but they are poor in pitting resistance. In order to enhance the pitting resistance of Al-based coatings, dendritic Ni and irregular Cr powders are co-doped into Al powders to prepare Al-Ni–Cr composite coatings by cold spraying. Their structure, composition, and corrosion behavior are characterized by optical microscopy, scanning electron microscopy (SEM), X-ray diffraction (XRD), dynamic potential polarization, and electrochemical impedance spectroscopy. The results show that the Al-Ni-30Cr coating exhibits the best corrosion resistance with high <i>E</i><sub>pit</sub>, small <i>i</i><sub>corr</sub> and <i>i</i><sub>pass</sub>, large <i>R</i><sub>ct</sub>, and superior self-healing ability. The protective corrosion products rapidly form in the early stage of corrosion, which can effectively fill corrosion pits and intrinsic pores in coatings, preventing further penetration of corrosive media and the continuation of auto-catalytic corrosion reaction of Cl<sup>−</sup> in the pits. The excellent anti-corrosion performance and long service life of the Al-Ni-30Cr coating are attributed to the self-healing ability and the synergistic shielding effect of nickel and chromium.</p>\",\"PeriodicalId\":665,\"journal\":{\"name\":\"Journal of Solid State Electrochemistry\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":2.6000,\"publicationDate\":\"2024-09-06\",\"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/s10008-024-06058-3\",\"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/s10008-024-06058-3","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ELECTROCHEMISTRY","Score":null,"Total":0}
Enhanced pitting resistance of Al-based coating by synergistic passivation effect from different shapes of Ni/Cr powders
Cold-sprayed Al-based coatings are widely used in corrosion protection fields, but they are poor in pitting resistance. In order to enhance the pitting resistance of Al-based coatings, dendritic Ni and irregular Cr powders are co-doped into Al powders to prepare Al-Ni–Cr composite coatings by cold spraying. Their structure, composition, and corrosion behavior are characterized by optical microscopy, scanning electron microscopy (SEM), X-ray diffraction (XRD), dynamic potential polarization, and electrochemical impedance spectroscopy. The results show that the Al-Ni-30Cr coating exhibits the best corrosion resistance with high Epit, small icorr and ipass, large Rct, and superior self-healing ability. The protective corrosion products rapidly form in the early stage of corrosion, which can effectively fill corrosion pits and intrinsic pores in coatings, preventing further penetration of corrosive media and the continuation of auto-catalytic corrosion reaction of Cl− in the pits. The excellent anti-corrosion performance and long service life of the Al-Ni-30Cr coating are attributed to the self-healing ability and the synergistic shielding effect of nickel and chromium.
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.