Corrosion Science· 2015Q1
SKPFM measured Volta potential correlated with strain localisation in microstructure to understand corrosion susceptibility of cold-rolled grade 2205 duplex stainless steel
- 225citations
- Q1SCImago
- 2015year
Short summary
Scanning Kelvin probe force microscopy (SKPFM) directly mapped Volta potential differences in duplex stainless steel, correlating them with strain localization sites identified by EBSD, to predict corrosion susceptibility changes after cold-rolling.
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Key points
- SKPFM revealed micro-galvanic coupling between ferrite and austenite in annealed duplex stainless steel, leading to selective ferrite dissolution.
- Cold-working reduced Volta potential differences between ferrite and austenite phases.
- Localized extremes in Volta potential were observed after cold-rolling, correlating with high misorientation concentrations identified by EBSD.
- Corrosion behavior shifted from selective dissolution in annealed steel to localized attack after cold-rolling, explained by strain localization.
AI-generated from the title and abstract; the full text is not read.
Abstract
Scanning Kelvin probe force microscopy (SKPFM) of annealed and cold-rolled grade 2205 duplex stainless steel has been correlated with microstructure analysis using electron back-scattered diffraction (EBSD). In annealed microstructure Volta potential differences indicated micro-galvanic coupling between ferrite and austenite reasoning selective dissolution of ferrite. The introduction of cold work reduced the difference between both phases, but the development of local extremes in Volta potential was observed. Microstructure analysis revealed the presence of larger misorientation concentrations at these sites, which can explain the changes in observed corrosion behaviour, from selective dissolution in the annealed condition to localised corrosion attack after cold-rolling.
The authors' abstract, as published at the source. Corrosion Science, 2015 · DOI ↗
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Field: Metals and Alloys
Metals and AlloysMaterials Science