Corrosion of Carbon Steel in Marine Environments: Role of the Corrosion Product Layer
| Autor: | Anne-Marie Grolleau, René Sabot, Marc Jeannin, Philippe Refait, C. Rémazeilles |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Carbon steel Akaganéite 020209 energy Metallurgy Iron sulfide 02 engineering and technology General Medicine engineering.material 021001 nanoscience & nanotechnology Cathodic protection Corrosion Metal chemistry.chemical_compound chemistry visual_art 0202 electrical engineering electronic engineering information engineering engineering Galvanic cell visual_art.visual_art_medium 0210 nano-technology Magnetite |
| Zdroj: | Corrosion and Materials Degradation. 1:198-218 |
| ISSN: | 2624-5558 |
| Popis: | This article presents a synthesis of recent studies focused on the corrosion product layers forming on carbon steel in natural seawater and the link between the composition of these layers and the corrosion mechanisms. Additional new experimental results are also presented to enlighten some important points. First, the composition and stratification of the layers produced by uniform corrosion are described. A focus is made on the mechanism of formation of the sulfate green rust because this compound is the first solid phase to precipitate from the dissolved species produced by the corrosion of the steel surface. Secondly, localized corrosion processes are discussed. In any case, they involve galvanic couplings between anodic and cathodic zones of the metal surface and are often associated with heterogeneous corrosion product layers. The variations of the composition of these layers with the anodic/cathodic character of the underlying metal surface, and in particular the changes in magnetite content, are thoroughly described and analyzed to enlighten the self-sustaining ability of the process. Finally, corrosion product layers formed on permanently immersed steel surfaces were exposed to air. Their drying and oxidation induced the formation of akaganeite, a common product of marine atmospheric corrosion that was, however, not detected on the steel surface after the permanent immersion period. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|