Gordon W | 24/09/2016 17:10:31 |
2011 forum posts | You are right about fire safe. I was asked to try and re-weld one that had been stolen and the back axed into. Found a lot of some sort of powder inside, between the walls. Impossible to weld even using arc. Had to power wash , dry and clean , still difficult to weld but good enough to keep papers in. Someone will know what the powder was. |
Mike | 24/09/2016 17:55:05 |
![]() 713 forum posts 6 photos | Don't know what the powder was, but the stuff in dry powder fire extinguishers is hardly rocket science - usually either sodium bicarbonate or potassium bicarbonate. My chemistry is poor, but I think both release CO2 at elevated temperatures. Whichever, good enough to save my kitchen when the dishwasher burst into flames... |
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