On Jun 5, 7:01 pm, dpb wrote:
Davoud wrote:
I bought some hot-dipped galvanized nails ...
... After too many bent nails I examined the nails. Where they bent
the zinc peeled off revealing aluminum beneath. I also noted that
hammer blows caused the nail heads to shed some zinc in nails that did
not bend.

...

I've never seen nor heard of galvanized Al nails -- I suspect they're
simply a very soft steel import. What does the box say?


That can be checked with a magnet.

Aluminum is amphiprotic, that means it reacts with both bases
and acids. But because it naturally forms a very tough oxide
(saphire), pure aluminum is naturally corrosion resistant
to anything that cannot penetrate that oxide layer. Concentrated
Nitric acid is routinely shipped in aluminum vessels. But dilute
nitric acid would eat through them.

Anyhow, IIRC the copper compounds used in AQC treated lumber
will eat through the oxide and corrode aluminum. But unless I
am mistaken, it eats through zinc too,. The best metal to use
with AQC lumber woudl probably be bronze--very expensive.
Copper plated steel would be my. possibly naive, first choice.

--

FF