6533b858fe1ef96bd12b6186
RESEARCH PRODUCT
The use of microcapillary techniques to study the corrosion resistance of AZ91 magnesium alloy at the microscale
Vincent VignalJ. LelitoHalina KrawiecJózef S. SuchyS. Staneksubject
Materials scienceGeneral Chemical EngineeringAlloyMetallurgyIntermetallicGeneral Chemistryengineering.materialCorrosionPhase (matter)engineeringGeneral Materials ScienceMagnesium alloyMicroscale chemistrySolid solutionEutectic systemdescription
Abstract The AZ91 alloy is composed of Mg 17 (Al, Zn) 12 precipitates, an eutectic phase around these precipitates, AlMn intermetallic particles and an α-Mg solid solution (matrix). The corrosion behaviour of AZ91 was investigated at the microscale by means of the electrochemical microcell technique, which uses extremely small capillaries (diameters between 5 and 10 μm). Experiments were conducted in 0.1 M NaClO 4 at 25 °C. The β-Mg 17 (Al, Zn) 12 precipitates were found to have the highest corrosion resistance, whereas the eutectic phase was very active (pitting potential of approximately −1400 mV vs. Ag/AgCl). The α-Mg solid solution displayed better corrosion resistance than the eutectic phase.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2011-10-01 | Corrosion Science |