Publication at Faculty of Mathematics and Physics |
2011
Abstract
The effect of microstructure refinement on corrosion of AE42 magnesium alloy was investigated. Electrochemical impedance spectroscopy in normal salinity solution (0.1M NaCl) showed a substantially higher charge transfer resistance in the fine-grained samples processed by equal channel angular pressing (ECAP) as compared to the asextruded material.
The corrosion layer on the ECAPed samples was different depending on the angle between the sample surface and the extrusion direction. The dispersed Al11RE3 particles stabilized the corrosion layer and therefore enhanced the corrosion resistance.