Optimizing the corrosion performance of rust layers: role of Al and Mn in lightweight weathering steel

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2024年3月27日

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Yihao Tang,
Yuxing Guo,
Pengfei Ji,
Bo Li,
Chaoqun Xia,
Shuzhi Zhang,
Junsong Zhang,
Xinyu Zhang,
Riping Liu

摘要

In this study, the corrosion behavior of AlMn lightweight weathering steel (LWS) in the simulated marine atmosphere was investigated by means of the dry/wet corrosion cycle test. The results showed that Al was present as FeAl₂O₄ and enriched in the inner layer, which significantly optimizes the rust layer in terms of compactness, elemental distribution, phase constitution, and electrochemical properties. The Mn oxides promoted the formation of FeAl₂O₄ and enhanced the anti–rupture ability of the LWS’s rust layer.