Pay Phone Charm

I just installed a brazed, rusted steel pay phone charm I made at 5th and Mill in Tempe, AZ. Photos below:

I designed the faceted gems in Solidworks, printed out templates for each face using images I made in MATLAB, cut out each face from 18g. mild steel sheet on a hydraulic shear, brazed all the pieces together with brass brazing rod and an oxyacetylene torch, cleaned up the edges with a 4" grinder, and then brazed them together with chain. I could only find zinc-plated chain so I burned off all the plating with the torch, which is probably not too advisable considering zinc fumes are bad and can give one something called "zinc flu". Finally I rusted the whole getup with a ferric nitrate solution I prepared by dissolving steel wool in nitric acid. I secured the charm to the pay phone with a padlock for safekeeping.

 
From Flickr user mishumishi.

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