Heat applied to the iron oxide releases the oxygen from the molecule which is free to bond with the aluminum. The product is iron and aluminum oxide. The overall reaction is exothermic so the heat of the reaction precipitates the release of more oxygen. The reaction continues until the supply of iron oxide is exhausted, or the heat of the reaction dips below the temperature needed to release more oxygen.
How does nano thermite work?
A thin layer of thermite coating a large mass of iron could not maintain the heat of reaction for a significant period of time. The iron, being conductive, would conduct the heat away from the reaction.
Someone who coated a beam with a paint thin layer of thermite would notice that the reaction would be contained within a short distance of the point of ignition, as the heat of ignition would be rapidly dissipated through the mass of the beam.
That being said, RWF. Who are these people that painted these beams? Can you located any of them? Who added the thermite to the paint? Who ignited the paint and how was it ignited?
Last edited by Fangbeer; Apr 28 2012 at 08:43 AM.
A great deal of intelligence can be invested in ignorance when the need for illusion is deep
“Indeed, a major source of objection to a free economy is precisely that it… gives people what they want instead of what a particular group thinks they ought to want. Underlying most arguments against the free market is a lack of belief in freedom itself.” - Milton Friedman