耐候钢锈层及其稳定化处理现状

doi:10.13228/j.boyuan.issn0449-749x.20200452

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Abstract Weathering steel has good atmospheric corrosion resistance,but the formation of stable rust layer is slow. Pretreatment of the surface of weathering steel before use can shorten the formation time of rust layer stabilization and prevent rust liquid from sagging. The development of weathering steel at home and abroad,the formation process of stabilized rust layer and the composition and structure of rust layer are briefly summarized. The rust layer is divided into loose outer rust layer dominated by γ-FeOOH and dense inner rust layer dominated by α-FeOOH. The mechanism of rust layer protection is introduced,including physical barrier,anodic passivation protection,corrosion inhibitor protection and ion selective penetration protection. In order to explore the best use of weathering steel,the current application methods of weathering steel are summarized,which are mainly used after exposed,coated and rust stabilized. The key points of stabilizing treatment for rust layer of weathering steel are put forward,that is,selecting suitable film forming materials and accelerants to promote the formation of α-FeOOH. The application and development direction of stabilization treatment technology in the future are prospected.

Key words： corrosion weathering steel rust layer stabilization treatment protection mechanism

Received: 02 September 2020

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	LIN Peng-fei
	YANG Zhong-min
	CHEN Ying
	LI Zhao-dong

Cite this article:

LIN Peng-fei,YANG Zhong-min,CHEN Ying等. Rust layer of weathering steel and its stabilization treatment status[J]. Iron and Steel, 2021, 56(3): 58-65.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20200452 OR http://www.chinamet.cn/Jweb_gt/EN/Y2021/V56/I3/58

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