How to differentiate pure nickel from nickel plated steel

How to differentiate pure nickel from nickel plated steel doing a simple test with water and salt.

As nickel and nickel plated steel are extremely difficult to difference at sight or at touch,
there are an easy homemade test that could be done in order to check if you have one or another.

- Take a strip sample and polish / scratch with a dremel tool or simply with a knife on a small area,
and put into salty water for 12h to 24h.

Corrosion is clearly shown only on nickel plated steel samples. This doesn't discard the steel for welding purposes,
if the strips are in good condition would be enough for batteries that will be used in dry environments.

*Don't forget that although pure nickel is 40% more expensive,
is 100% better at conducting electricity than nickel plated steel.

Music: ODESZA - All We Need (feat. Shy Girls) (Autograf Remix)

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[darinmbicknell]

Our students will be working with recycled materials. Good simple test. Thanks.

[FighterStreet]

Can you just use sandpaper instead of a polisher?

[NSAwatchesME]

the problem is where do you actually get pure nickel strip from..

[Bodragon]

But what if it is nickel plated stainless steel ?
Eh ?
What then ?
>