Foeskes
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Etching or anodizing tin
For a art project I have to etch tin. I tried a few things I tired anodizing it with 3,6,12v with sodium sulfate and borax solutions both
concentrated, It just turned some tin into SnO2 and that's it. I also tried a mixture of 1:1 copper sulfate and sodium chloride with a bit of nitric
acid, it didn't do much but it did show the tin's crystal structure.
I managed to get the tin to go golden while it was cooling down, but I couldn't find a way to get it to do that without heating.
Any suggestions?
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Sulaiman
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Offhand I can't think of a simple colourful tin salt.
But etching may allow a dye or pigment to adhere ?
CAUTION : Hobby Chemist, not Professional or even Amateur
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happyfooddance
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If you were to selectively plate some copper and/ or zinc, you could then apply heat to get bronzey/brassy colors... Other than that idk...
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unionised
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Tin sulphide is brown. A thin layer might be yellow.
What are you actually trying to achieve?
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AJKOER
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To etch Sn, a transition metal, first try lemon water + 3% H2O2 + sea salt + heat.
Not as people friendly (chlorine fumes, perform in a well ventilated area) but stronger, use chlorine bleach (NaClO) + vinegar + sea salt and warming.
[Edited on 27-2-2018 by AJKOER]
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Foeskes
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I just wanted a color difference. Anyways I was thinking of anodizing in sodium polysulfide, maybe that will do the trick. not sure if the color will
stick or not.
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Metacelsus
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This is wrong. Tin isn't a transition metal.
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AJKOER
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Technically, you are right, I view it as transition metal-like owing to the ability of select Sn salt to be radical precursors (see https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4994065/ , https://link.springer.com/chapter/10.1007/978-94-011-4938-9_... and http://www.carborad.com/Volume%20II/Chapter%202/Halides.pdf ).
It is, per some, deemed to be a 'post-transitional metal'. For example, from Wikipedia (https://en.wikipedia.org/wiki/Post-transition_metal ):
"Post-transition metals are a set of metallic elements in the periodic table located between the transition metals to their left, and the metalloids
to their right. Depending on where these adjacent groups are judged to begin and end, there are at least five competing proposals for which elements
to include: the three most common contain six, ten and thirteen elements, respectively (see image). All proposals include gallium, indium, tin,
thallium, lead, and bismuth."
[Edit] I did find a reference on forming higher valence states for Tin at http://pubs.rsc.org/-/content/articlepdf/2017/ra/c7ra04041e .
[Edited on 28-2-2018 by AJKOER]
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Foeskes
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Most periodic tables I've seen says tin is a post transition metal.
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