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Is aluminium safe in salt water?


bezz
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Interesting topic... did a search and found these:

http://en.wikipedia.org/wiki/Metal

Others, like palladium, platinum and gold, do not react with the atmosphere at all. Some metals form a barrier layer of oxide on their surface which cannot be penetrated by further oxygen molecules...

Painting or anodising metals are good ways to prevent their corrosion.

(~ cci[RR]us ~)
A pair of Nemos :: Deep Sand Bed
Solite 2x24W T5 :: Prizm Skimmer with Overflow attachment

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Most metals reacts with oxygen and oxidise even gold, thus metal oxide. Oxygen can be remove by electrode, acid wash etc with exception of iron oxide. i.e FeO2, flaking occurs due to breaking down of molecular bond.

With salt water, it does not participate in oxidation but acts as a accelerator of oxidation. Some metal even does not flake with oxidation so it is safer to use those.

Think of it is that, our ocean is not free of minerals, so dissolved metal is okay, if you chose a inert metal that you can afford. Aluminum is a good choice but it is a soft metal though.

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