leftysergeant
Penultimate Amazing
- Joined
- Jul 13, 2007
- Messages
- 18,863
I have checked out several types of paint and primers to see if any of them matched the composition of these chips. There are paints that contain iron oxides and feldspars, which would include k-feldspars (thus accounting for the silicon and potassiunm in Jones' sample) as a filler.
I cannot get the formula for the proprietary pigment in Tenmec primer, which was that used on the steel of the towers, at this time,so I cannot totally rule that out as a source of those elements, but it seems less likely, seeing that the filler was diatomaceous earth, nearly pure silca. There may have been aluminum oxide and some potassium compound in the pigment, but that would be speculative.
This does not rule out that there were fire extinguishers and such painted with a red oxide paint that does use a feldspathic filler. There were, without question, a few of those ground up in the collapses.
I seem to recall, as well, reading of a powder coating being applied to some extinguisher cyclinders before they are painted. That would be another source of aluminum.
This is, of course, also speculative, though well within the realm of possibility.
As I have noted before, their shape, thickness and fragility do suggest paint chips, and paint chips are to be expected in the dust.
I cannot get the formula for the proprietary pigment in Tenmec primer, which was that used on the steel of the towers, at this time,so I cannot totally rule that out as a source of those elements, but it seems less likely, seeing that the filler was diatomaceous earth, nearly pure silca. There may have been aluminum oxide and some potassium compound in the pigment, but that would be speculative.
This does not rule out that there were fire extinguishers and such painted with a red oxide paint that does use a feldspathic filler. There were, without question, a few of those ground up in the collapses.
I seem to recall, as well, reading of a powder coating being applied to some extinguisher cyclinders before they are painted. That would be another source of aluminum.
This is, of course, also speculative, though well within the realm of possibility.
As I have noted before, their shape, thickness and fragility do suggest paint chips, and paint chips are to be expected in the dust.