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Approximately 200 gram full slice. Iron IVA
Corey writes:
Sometimes we use acid to make a very thin passivation membrane on the surface to protect from rust. The basic principle is to use an acid like nitric or sulfuric in very high concentration (>70%). I've devised a special way of passivation that made this Gibeon slice show many colors from different angles on the surface - blue, gold, pink, brown.
More about passivation at NACE
Click to view larger photos #1
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Robert lopez
2/27/2020 11:42:46 PM |
How much is this irun rock $$$ |
Corey
3/31/2012 11:28:05 AM |
Thanks Larry , you can try use sulfuric , but please be careful , you will get A LOT smoke ! It's not a funny work . |
larry
3/29/2012 5:07:49 PM |
That is very nice looking, thanks for posting. I need to look into the process. |
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