[Boatanchors] white dust on aluminum

[Jim Wilhite]

Any mildly acetic solution should remove the "dust" which is corrosion 
due to oxygen breaching the protective layer on the aluminum.  Muriatic 
acid or vinegar either should remove the layer.  I would try the vinegar 
first along with a Scotchbrite pad.

Once the corrosion is removed use something to seal it against the air. 
Clear spray made by Kryon will work but do be careful because a scratch 
will expose the surface again.

Jim/W5JO

----- Original Message ----- 



>I have a piece of  equipment in an aluminum case that has been in a 
>very humid
> environment and was sweating due to condensation  in the shipping 
> crate. The
> instrument case has suffered from the condensate.
>
>
> The aluminum, after drying, has a coat of aluminum dust or powder that 
> needs to
> be removed. It is a very valuable instrument and can be very useful in 
> the shop
> and shack.
>
> If anyone can tell me how to remove the white powder that I believe to 
> be
> oxidation, I will greatly appreciate it. Chemistry was not my strong 
> subject.
> Come to think of it, I don't think I had a strong subject.
>
> Assisting with your chemical expertise will be appreciated. 73, John, 
> K5PGW
>
> ______________________________________________________________
> Boatanchors mailing list
> Home: http://mailman.qth.net/mailman/listinfo/boatanchors
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Boatanchors at mailman.qth.net
>
> List Administrator: Duane Fischer, W8DBF
> ** For Assistance: dfischer at usol.com **
>
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>