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Corrosion mechanisms of mild steel in chloride-rich atmospheres

AuthorsFuente, Daniel de la; Díaz, Iván; Alcántara, J.; Chico, Belén; Simancas Peco, Joaquín; Llorente, Irene; García Delgado, Antonio; Jiménez, José Antonio; Adeva, Paloma ; Morcillo, Manuel
KeywordsCarbon steel
Consolidated rust layer
Issue Date2016
PublisherJohn Wiley & Sons
CitationMaterials and Corrosion - Werkstoffe und Korrosion 67(3): 227- 238 (2016)
AbstractThis work analyses the corrosion mechanisms of carbon steel when exposed to marine atmospheres with very different chloride ion deposition rates. Two extreme situations are described, characterized by a >consolidated rust layer> (at relatively low atmospheric salinities), formed by a diffusion-controlled corrosion mechanism in which the reduction of dissolved oxygen in the aqueous film deposited on the metal is the predominant cathodic reaction, and an >exfoliated rust layer> (at high atmospheric salinities), where the cathodic reaction of hydrogen evolution becomes important, notably accelerating the corrosion process. The research has employed a range of near-surface and bulk sensitive analytical techniques (SEM/EDS, μXRD, and SEM/μRaman) to characterize the corrosion products and rust layers formed.
Identifiersdoi: 10.1002/maco.201508488
issn: 1521-4176
Appears in Collections:(CENIM) Artículos
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