Determining if there is Tin Plating on an Aluminum Bar

J
#1
How would one go about determining if there is tin plating on an aluminum bar?

Peace
James
 
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Jim Wynne

Staff member
Admin
#2
How would one go about determining if there is tin plating on an aluminum bar?

Peace
James
For a definitive test you might have to use an XRF (x-ray fluorescence) device, but if you have plated and raw parts you should be able to see the difference. See the attachment--the part on the left is tin-plated and the one on the right is bare aluminum.
 

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Mikishots

Trusted Information Resource
#3
How would one go about determining if there is tin plating on an aluminum bar?

Peace
James
There's a couple of simple chemical tests you could try if you need to:

Concentrate sodium hydroxide solution (lye water) will bubble on tin and form a white residue. This won't happen on aluminum.

Silver nitrate (if I remember correctly) turns blue when it comes into contact with tin.
 

LesPiles

Involved In Discussions
#6
Thanks Jim.

I found Fisher Scientific ...
Would be better I'm sure than Amazon ;)

Some people might ask themselves questions about people looking for chemicals on the net, eventhough intentions are legitimate ;)

Going with suppliers for scientific stuff should be better.

Thanks anyways ! :)


Les Piles
 

Mikishots

Trusted Information Resource
#7
Thanks Jim.

I found Fisher Scientific ...
Would be better I'm sure than Amazon ;)

Some people might ask themselves questions about people looking for chemicals on the net, eventhough intentions are legitimate ;)

Going with suppliers for scientific stuff should be better.

Thanks anyways ! :)


Les Piles
Nothing wrong with Amazon - these two chemicals are not controlled and are very common. One is just lye, and silver nitrate is easily available (I used to get mine from a local photography supply shop).

In this case, go for best price if you decide to buy.

EDIT: A clarification - sodium hydroxide in small amounts (like this application) is not controlled, but some states consider large amounts of NaOH as being controlled. The reason is that it's an ingredient in methamphetamine.
 
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