IMR OpenIR
Influence of Inclusions on Early Corrosion Development of Ultra-Low Carbon Bainitic Steel in NaCl Solution
Wei, J.; Dong, J. H.; Ke, W.; He, X. Y.; jhdong@imr.ac.cn
2015
Source PublicationCORROSION
ISSN0010-9312
Volume71Issue:12Pages:1467-1480
AbstractThe early corrosion development of ultra-low carbon bainitic (ULCB) low alloy steel in NaCl solution was studied by ex situ imaging of corrosion morphology and in situ monitoring of microarea current density and potential, and the corrosion mechanism from initial localized corrosion to uniform corrosion was interpreted. The results indicate that the corrosion development of ULCB steel from initial localized corrosion around inclusions to the uniform corrosion on the whole steel surface is controlled by the galvanic couple effect between different phases resulting from their electrode potential difference in electrolyte solution. The early localized corrosion of steel matrix is initiated and accelerated by the galvanic couple effect between MnS inclusions and steel matrix to form the initial corrosion gaps and the circular corrosion spots around inclusions. The ohmic drop caused by solution resistance influences the acceleration effect of the galvanic couple. With the separation of inclusion from steel matrix, this galvanic couple effect becomes invalid, which results in the expansion from localized corrosion to uniform corrosion. The microgalvanic couple between martensite/ residual austenite (M/A) islands and bainite ferrite also accelerates the anodic dissolution of bainite ferrite phase; however, its acceleration corrosion effect is much weaker than that caused by MnS inclusion.
description.department[wei, j. ; dong, j. h. ; ke, w. ; he, x. y.] chinese acad sci, inst met res, environm corros ctr, shenyang 110016, peoples r china
KeywordGalvanic Corrosion Inclusions Microstructure Morphological Phenomena Scanning Electrochemical Microprobe
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/74916
Collection中国科学院金属研究所
Corresponding Authorjhdong@imr.ac.cn
Recommended Citation
GB/T 7714
Wei, J.,Dong, J. H.,Ke, W.,et al. Influence of Inclusions on Early Corrosion Development of Ultra-Low Carbon Bainitic Steel in NaCl Solution[J]. CORROSION,2015,71(12):1467-1480.
APA Wei, J.,Dong, J. H.,Ke, W.,He, X. Y.,&jhdong@imr.ac.cn.(2015).Influence of Inclusions on Early Corrosion Development of Ultra-Low Carbon Bainitic Steel in NaCl Solution.CORROSION,71(12),1467-1480.
MLA Wei, J.,et al."Influence of Inclusions on Early Corrosion Development of Ultra-Low Carbon Bainitic Steel in NaCl Solution".CORROSION 71.12(2015):1467-1480.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Wei, J.]'s Articles
[Dong, J. H.]'s Articles
[Ke, W.]'s Articles
Baidu academic
Similar articles in Baidu academic
[Wei, J.]'s Articles
[Dong, J. H.]'s Articles
[Ke, W.]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Wei, J.]'s Articles
[Dong, J. H.]'s Articles
[Ke, W.]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.