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Effects of surface states on the oxidation behavior of 316LN stainless steel in high temperature pressurized water
Guo, Y. -L.; Han, E. -H.; Wang, J. -Q.; ehhan@imr.ac.cn
2015
Source PublicationMATERIALS AND CORROSION-WERKSTOFFE UND KORROSION
ISSN0947-5117
Volume66Issue:7Pages:670-680
AbstractNuclear grade 316LN stainless steel with different surface states are prepared: electropolished and ground to 240 grit. Surface topography, surface Volta potential distribution, and nanohardness distribution on cross-sectional surface are investigated, respectively. Oxide films on the ground and electropolished samples after immersion in high temperature pressurized (HTP) water for 0.1, 168, and 366 h were studied using various methods. Distinct from electropolished surface, the ground surface is featured by a rugged surface and a heterogeneous distribution of surface Volta potential. A thicker (similar to 28 mu m) cold-worked layer was introduced by grinding. More crystallites were precipitated on the ground surface, resulting from the existence of high-energy sites with higher residual strain and higher electrochemical activity and a less protective inner layer. The oxidation rate was reduced by electropolishing and a thinner oxide film was formed, due to the formation of a more protective oxide film with higher content of chromium (Cr). The mechanism of oxide film formation was further discussed.
description.department[guo, y. -l.] univ sci & technol beijing, natl ctr mat serv safety, beijing 100083, peoples r china ; [han, e. -h. ; wang, j. -q.] chinese acad sci, inst met res, key lab nucl mat & safety assessment, shenyang 110016, peoples r china
Funding OrganizationNational Science and Technology Major Project [2011ZX06004-009]; Special Funds for the Major State Basic Research Projects [G2011CB610501]
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/74795
Collection中国科学院金属研究所
Corresponding Authorehhan@imr.ac.cn
Recommended Citation
GB/T 7714
Guo, Y. -L.,Han, E. -H.,Wang, J. -Q.,et al. Effects of surface states on the oxidation behavior of 316LN stainless steel in high temperature pressurized water[J]. MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION,2015,66(7):670-680.
APA Guo, Y. -L.,Han, E. -H.,Wang, J. -Q.,&ehhan@imr.ac.cn.(2015).Effects of surface states on the oxidation behavior of 316LN stainless steel in high temperature pressurized water.MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION,66(7),670-680.
MLA Guo, Y. -L.,et al."Effects of surface states on the oxidation behavior of 316LN stainless steel in high temperature pressurized water".MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION 66.7(2015):670-680.
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