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Registered
Join Date: Jun 2007
Location: Lake Oswego, OR
Posts: 6,307
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I think. Not certain, that this is a surface coating failing.
Aluminum self seals with an oxide layer. Anodizing is this process in the extreme.
An oddity? Aluminum is reactive to both a base and an acid.
I couldn't exactly see what was happening here on an iPad. Perhaps a large screen would give more detail.
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