A study of the evolution of rust on weathering steel submitted to the Qinghai salt lake atmospheric corrosion

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	A study of the evolution of rust on weathering steel submitted to the Qinghai salt lake atmospheric corrosion
	J. Wang; Z. Y. Wang; W. Ke
	2013
发表期刊	Materials Chemistry and Physics
ISSN	0254-0584
卷号	139 期号:1 页码:225-232
摘要	The corrosion evolution of weathering steel in Qinghai salt lake atmospheres as a function of exposure duration (up to 30 months) was investigated by corrosion weight gain, XRD, SEM, EDX and electrochemical techniques. The results indicated that the corrosion kinetics was closely related to the characteristics of the rust layer including composition, structure and electrochemical properties. The weight loss monotonically increased as exposure time prolonged with the fluctuations of average corrosion rate. The rust composition was mainly changed from gamma-FeOOH and beta-FeOOH (6 months), via beta-FeOOH and magnetite (18 months), to magnesioferrite and iowaite (30 months). Correspondingly, the rust structure altered from loose and porous (6 months), via relative dense and adherent (18 months), to incompact and discontinuous again (30 months). The result of electrochemical measurements showed that rust resistance was very small, indicating that the rust layer had a poor barrier function which cannot prohibit the corrosion of steel effectively. The presence of iowaite (Mg4Fe(OH)(8)OCl center dot 4H(2)O), which could attract Cl ions due to its special structure, was detrimental to the corrosion resistance of the rust layer and responsible for the poor weatherability of weathering steel. Crown Copyright (C) 2013 Published by Elsevier B.V. All rights reserved.
部门归属	[wang, j. ; wang, z. y. ; ke, w.] chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china. ; wang, zy (reprint author), chinese acad sci, inst met res, state key lab corros & protect, wencui rd 62, shenyang 110016, peoples r china. ; zhywang@imr.ac.cn
关键词	Metals Electron Microscopy Energy Dispersive Analysis Of X-rays Electrochemical Techniques Corrosion Low-alloy Steels Carbon-steel Electrochemical-impedance Marine-environment Protective Ability Room-temperature Oxide-films Mechanism Iron Reduction
URL	查看原文
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/71532
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. Wang,Z. Y. Wang,W. Ke. A study of the evolution of rust on weathering steel submitted to the Qinghai salt lake atmospheric corrosion[J]. Materials Chemistry and Physics,2013,139(1):225-232.
APA	J. Wang,Z. Y. Wang,&W. Ke.(2013).A study of the evolution of rust on weathering steel submitted to the Qinghai salt lake atmospheric corrosion.Materials Chemistry and Physics,139(1),225-232.
MLA	J. Wang,et al."A study of the evolution of rust on weathering steel submitted to the Qinghai salt lake atmospheric corrosion".Materials Chemistry and Physics 139.1(2013):225-232.