Nanoscale electrochemical visualization of grain-dependent anodic iron dissolution from low carbon steel
| Autor: | Jolyon Aarons, Patrick R. Unwin, Barbara A. Shollock, Viacheslav Shkirskiy, Geoffrey D. West, Cameron Luke Bentley, Lewis C. Yule |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Carbon steel Scanning electron microscope QH General Chemical Engineering Alloy 02 engineering and technology engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology Microstructure TS 01 natural sciences 0104 chemical sciences Scanning probe microscopy Chemical engineering 13. Climate action Scanning transmission electron microscopy Electrochemistry engineering QD 0210 nano-technology Dissolution QC Electron backscatter diffraction |
| Zdroj: | Electrochimica Acta |
| ISSN: | 0013-4686 |
| DOI: | 10.1016/j.electacta.2019.135267 |
| Popis: | The properties of steels and other alloys are often tailored to suit specific applications through the manipulation of microstructure (e.g., grain structure). Such microscopic heterogeneities are also known to modulate corrosion susceptibility/resistance, but the exact dependency remains unclear, largely due to the challenge of probing and correlating local electrochemistry and structure at complex (alloy) surfaces. Herein, high-resolution scanning electrochemical cell microscopy (SECCM) is employed to perform spatially-resolved potentiodynamic polarisation measurements, which, when correlated to co-located structural information from electron backscatter diffraction (EBSD), analytical scanning electron microscopy (SEM) and scanning transmission electron microscopy (STEM), reveal the relationship between anodic metal (iron) dissolution and the crystallographic orientation of low carbon steel in aqueous sulfuric acid (pH 2.3). Considering hundreds of individual measurements made on each of the low-index planes of body-centred cubic (bcc) low carbon steel, the rate of iron dissolution, and thus overall corrosion susceptibility, increases in the order (101) |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect