Insight into the role of Si on corrosion resistance of weathering steel in a simulated industrial atmosphere
Zhenye Chen, Qiang Yu, Liyang Zhao, Caidong Zhang, Mengsen Gu, Qingfeng Wang, Guodong Wang
Abstract
This study investigates the role of Si on the corrosion resistance of weathering steel(WS) in a simulated industrial environment. With increasing Si content (0.15-0.50%), the corrosion resistance of WS is enhanced. On the one hand, the rust layer becomes compact and uniform because higher Si content promotes the formation of fine α-FeOOH. On the other hand, Si reacts with Fe3O4 to form a three-dimensional SiO2 network structure located around the cracks and holes of the rust layer. This structure has a protective effect, enhancing the corrosion resistance of WS and equipping the rust layer with self-healing functionality.
Topics & Concepts
CorrosionWeathering steelMaterials scienceRust (programming language)Layer (electronics)WeatheringMetallurgyAtmosphere (unit)Composite materialGeologyComputer scienceGeomorphologyProgramming languageThermodynamicsPhysicsCorrosion Behavior and InhibitionConcrete Corrosion and DurabilityHydrogen embrittlement and corrosion behaviors in metals