Integranular corrosion susceptibility analysis in austeno-ferritic (duplex) stainless steels
| Autor: | Francesco Iacoviello, V. Di Cocco, E. Franzese |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
0209 industrial biotechnology
Materials science 020209 energy 02 engineering and technology SAF 2507 engineering.material 01 natural sciences SAF 2205 Corrosion Carbide 020901 industrial engineering & automation Ferrite (iron) 0103 physical sciences 0202 electrical engineering electronic engineering information engineering General Materials Science Duplex stainless steels Tempering Earth-Surface Processes 010302 applied physics Austenite Duplex Stainless SteelsIntergranular corrosionDL-EPR test Mechanical Engineering Metallurgy Intergranular corrosion 021001 nanoscience & nanotechnology Mechanics of Materials Duplex (building) engineering 0210 nano-technology |
| Popis: | Austenitic-ferritic stainless steels combine the favorable properties of ferrite and austenite, showing both high mechanical properties and very good corrosion resistance. These steels are characterized by the precipitation of many secondary phases, carbides and nitrides for tempering temperatures between 200 and 1050°C. This phenomenon implies a high susceptibility to localized corrosion, however better than austenitic and ferritic grades. In this work, the susceptibility to intergranular corrosion in of two duplex stainless steel characterized by analogous ferrite/austenite volume fraction was investigated. A “standard” duplex stainless steel SAF 2205 and a “super” duplex stainless steel SAF 2507 were investigated by means of potentiostatic reactivations tests. In addition, chronoamperometric tests and light optical microscope observations of the specimens surfaces were performed in order to analyze the evolution of the corrosion morphologies. |
| Databáze: | OpenAIRE |
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