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Corrosion relationships as a function of time and surface roughness on a structural AE44 magnesium alloy

Corrosion relationships as a function of time and surface roughness on a structural AE44 magnesium alloy,10.1016/j.corsci.2010.01.018,Corrosion Scienc

Corrosion relationships as a function of time and surface roughness on a structural AE44 magnesium alloy   (Citations: 3)
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Pit initiation, growth, and coalescence corrosion mechanisms of an AE44 magnesium alloy subjected to a salt-water environment were quantified. Stereological quantities were evaluated using optical microscopy, scanning electron microscopy, and laser beam profilometry. Three corrosion mechanisms clearly arose: pitting, intergranular, and general. Pitting began as the result of localized galvanic dissolution between the intermetallics and magnesium matrix. Intergranular corrosion arose as pits coalesced. General corrosion arose by dissolution and regeneration of a Mg(OH)2 film at a continuous rate. Stereological quantification demonstrated that the corrosion pit number density and pit radius size distribution initially increased before decreasing due to pit coalescence.
Journal: Corrosion Science - CORROS SCI , vol. 52, no. 5, pp. 1635-1648, 2010
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