Salt + Raw Aluminum ?

hubbabubba · Jul 9, 2010

Doesn't salt corrode raw aluminum? I saw some salt and pepper shakers that are very cool, but they are not anodized.

LukeA · Jul 10, 2010

With solid-on-solid contact, there's infinitely less contact area than if the salt was in a solution. Solids generally don't interact chemically with one another they way liquids and solutions do. I wouldn't worry about the salt corroding the aluminum.

march.brown · Jul 10, 2010

The steam in a kitchen might not help.
.

LukeA · Jul 10, 2010

march.brown said:
The steam in a kitchen might not help.
.

Then the salt will clump and you'll have other problems.

Turboman7 · Jul 10, 2010

LukeA said:
Then the salt will clump and you'll have other problems.

Unless you add some rice to the mixture. The grains will absorb the moisture.

Hey hubbabubba, where did you see these? They are pretty cool. I might get a set.

blasterman · Jul 10, 2010

Aluminum is not soluble in salt water. A lesson often taught with my reef tanks. However, it will attack impurities in various alu alloys.

I'm not too concerned about these S&P shakers.

LukeA · Jul 10, 2010

Turboman7 said:
Unless you add some rice to the mixture. The grains will absorb the moisture.

...and then any problems caused by salt in solution will vanish as well. So they're still not an issue.

Empath · Jul 11, 2010

There's an interesting pdf, regarding the matter.

Here's a quote from it:

Salt water DOES NOT corrode aluminum!

You may have noticed that you never see aluminum
corrosion in lakes, pools, food packaging products, etc.
Typically, if you have seen corroded aluminum, it was in
or near the ocean. While it may seem logical to draw the
conclusion that the salt water must be corrosive to the
aluminum, it is not. Salt water does not corrode aluminum
because of its neutral pH. A saltwater solution can, however,
be a major facilitator for galvanic or dissimilar metal
corrosion, a more complex corrosive process.

JohnR66 · Jul 11, 2010

Al is actually a reactive metal. It, in fact, almost instantly forms a thin, transparent oxide coating on its surface. This coating is what protects it making it seem resilient.

hubbabubba · Jul 12, 2010

Thanks for the info guys.

Turboman7 said:
Hey hubbabubba, where did you see these? They are pretty cool. I might get a set.

They are at http://www.karaskustomsonline.com/?page_id=8

Salt + Raw Aluminum ?

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