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Effects of Cl- Ions on the Corrosion Behaviour of Low Alloy Steel in Deaerated Bicarbonate Solutions
Lu, Yunfei; Dong, Junhua; Ke, Wei; Dong, JH (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China.
2016-04-01
Source PublicationJOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN1005-0302
Volume32Issue:4Pages:341-348
AbstractThe effect of Cl-ions on corrosion evolution of NiCu low alloy steel during immersion tests (up to 70 days) in deaerated 0.05 mol/L bicarbonate solutions was investigated by in-situ electrochemical measurements combined with X-ray diffraction (XRD), scanning electron microscopy (SEM) and electron probe microanalysis (EPMA) characterisations. The results showed that due to the acceleration of substrate dissolution in the presence of Cl-, corrosion of NiCu low alloy steel underwent only two stages, i.e., a quick oxidation process followed by a final metastable passive state, without the initial slow anodic dissolution as observed in the C1(-)-free bicarbonate solution. The main components of the formed rust layer in the Cl--free bicarbonate solution were alpha-FeOOH and Fe3O4, while apart from alpha-FeOOH, Fe-6(OH)(12)CO3 was found evident instead of Fe3O4 in the Cl--containing solution. Metastable pits were only found in the Cl--containing solution where Cl- accumulated after the immersion test, confirming the attack of Cl-on the substrate after penetrating the formed corrosion product layer. Copyright (C) 2016, The editorial office of Journal of Materials Science & Technology. Published by Elsevier Limited. All rights reserved.
description.department[lu, yunfei ; dong, junhua ; ke, wei] chinese acad sci, inst met res, shenyang 110016, peoples r china ; [lu, yunfei] wuhan second ship design & res inst, wuhan 430064, peoples r china
KeywordLow Alloy Steel Corrosion Behaviour Cl- Open Circuit Potential Electrochemical Impedance Spectroscopy (Eis)
Subject AreaMaterials Science ; Metallurgy & Metallurgical Engineering
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/75923
Collection中国科学院金属研究所
Corresponding AuthorDong, JH (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China.
Recommended Citation
GB/T 7714
Lu, Yunfei,Dong, Junhua,Ke, Wei,et al. Effects of Cl- Ions on the Corrosion Behaviour of Low Alloy Steel in Deaerated Bicarbonate Solutions[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2016,32(4):341-348.
APA Lu, Yunfei,Dong, Junhua,Ke, Wei,&Dong, JH .(2016).Effects of Cl- Ions on the Corrosion Behaviour of Low Alloy Steel in Deaerated Bicarbonate Solutions.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,32(4),341-348.
MLA Lu, Yunfei,et al."Effects of Cl- Ions on the Corrosion Behaviour of Low Alloy Steel in Deaerated Bicarbonate Solutions".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 32.4(2016):341-348.
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