Abstract
The effect of a saline environment on the surfaces of rapidly solidified Mg−.5wt.%Al alloy splats has been studied by different surface analysis techniques keeping in perspective the depth and spatial resolution of each technique. The surface of the as-splat alloy consists of an admixture of magnesium hydroxide and oxide with hydroxide depleting with depth. The corrosion products are acicular and voluminous. Hydrolysis of the cubic oxide to the hexagonal brucite causes the formation of a microporous brucite structure. Hydromagnesite is formed on excess of magnesium hydroxide with chlorine ion incorporated between the hydroxide (brucite) layers.
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