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Detection and analysis of anodic current transients associated with nanoscale beta-phase precipitates on an Al-Mg microelectrode
Guan, L.; Zhou, Y.; Lin, H. Q.; Zhang, B.; Wang, J. Q.; Han, E. -H.; Ke, W.; bxz011@imr.ac.cn
2015
Source PublicationCORROSION SCIENCE
ISSN0010-938X
Volume95Pages:6-10
AbstractThe metastable pitting of Al-5 wt%Mg microelectrode (diameter 50 mu m) after aging at 150 degrees C for 10 h has been investigated under a constant potential in deaerated 0.6 M NaCl solution (pH 3.5). Current transients (pA size) associated with the dissolution of nanoscale beta-phase precipitates have been detected. Taking the cathodic current of H-2 evolution inside the pit into account, the average volume determined from a charge associated with individual current transients is about 39% of those measured by TEM. This result implies that the selective dissolution of Mg in beta-phase precipitates (Al3Mg2) may occur during the metastable pitting process. (C) 2015 Elsevier Ltd. All rights reserved.
description.department[guan, l. ; zhou, y. ; zhang, b. ; wang, j. q. ; han, e. -h. ; ke, w.] chinese acad sci, inst met res, key lab nucl mat & safety assessment, shenyang 110016, peoples r china ; [lin, h. q.] csr qingdao sifang co ltd, natl engn res ctr high speed emu, qingdao 266111, peoples r china
KeywordAluminum Alloy Potentiostatic Electrochemical Calculation Tem Pitting Corrosion
Funding OrganizationNational Natural Science Foundation of China [51171200, 51131008]
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/74713
Collection中国科学院金属研究所
Corresponding Authorbxz011@imr.ac.cn
Recommended Citation
GB/T 7714
Guan, L.,Zhou, Y.,Lin, H. Q.,et al. Detection and analysis of anodic current transients associated with nanoscale beta-phase precipitates on an Al-Mg microelectrode[J]. CORROSION SCIENCE,2015,95:6-10.
APA Guan, L..,Zhou, Y..,Lin, H. Q..,Zhang, B..,Wang, J. Q..,...&bxz011@imr.ac.cn.(2015).Detection and analysis of anodic current transients associated with nanoscale beta-phase precipitates on an Al-Mg microelectrode.CORROSION SCIENCE,95,6-10.
MLA Guan, L.,et al."Detection and analysis of anodic current transients associated with nanoscale beta-phase precipitates on an Al-Mg microelectrode".CORROSION SCIENCE 95(2015):6-10.
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