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In situ observation on filiform corrosion propagation in Mg-Al-Y alloy: the effects of continuous and discontinuous Mg17Al12 precipitates
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DOI：10.1016/j.jma.2026.102202.png)
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Abstract
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● Filiform corrosion behavior of aged Mg-9Al-0.2Y alloy was investigated by in-situ digital microscope observation. ● Due to the stronger micro-galvanic effect, filiform corrosion preferentially propagates along the lamellar DPs regions. ● The dense CPs regions exhibit a barrier effect against corrosion propagation. ● Grain boundaries act as preferential propagation channels for corrosion.
Keywords:
Magnesium alloy
Filiform corrosion
Microstructure
Localized corrosion
Corrosion film
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