Sulfidation of steel article

Anti-sophist

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Anti-sophist
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Most of us have heard that the truther claim that sulfidation of steel happened because sulfur is a component in thermate. After beating it into their heads that sulfur was also omni-present in the towers, they move on to the second level of the argument.

They argue (as Jones does) that sulfidation of steel occurs only at high temperatures. This is typically used a proof that the temperatures exceeded 1000-C predicted by NIST. The inherent claim here is that steel will not sulfidize at these temperatures (most truthers, for some reason, believe steel should be near the melting point in order to sulfidize)

I recently stumbled upon this abstract:

The Sulfidation Behavior of Several Commercial Ferritic and Austenitic Steels

Authors: Schulte M.; Rahmel A.; Schutze M.
Source: Oxidation of Metals, Volume 49, Numbers 1-2, 1 February 1998, pp. 33-70(38)
Publisher: Springer

The sulfidation behavior of C-steel, 1Cr-0,5Mo steel, 12Cr-1Mo-0.25V steel, 18Cr-10Ni-Ti steel, the binary alloys Fe-20Cr, Fe-25Cr, Fe-30Cr, and pure Cr was investigated between 400 and 700°C in a 94Ar-5H_2-1H_2S gas mixture.
Click to expand...


http://www.ingentaconnect.com/content/klu/oxid/1998/00000049/F0020001/00292489
 
Anti-sophist said:
Most of us have heard that the truther claim that sulfidation of steel happened because sulfur is a component in thermate. After beating it into their heads that sulfur was also omni-present in the towers, they move on to the second level of the argument.

They argue (as Jones does) that sulfidation of steel occurs only at high temperatures. This is typically used a proof that the temperatures exceeded 1000-C predicted by NIST. The inherent claim here is that steel will not sulfidize at these temperatures (most truthers, for some reason, believe steel should be near the melting point in order to sulfidize)

I recently stumbled upon this abstract:




http://www.ingentaconnect.com/content/klu/oxid/1998/00000049/F0020001/00292489
Click to expand...
Erm...
Those are high Chromium content steels--weren't used in WTC construction...
 
Does chromium effect the temperature at which sulfidation can occur? This is sort of a question meant as a plea for more information.
 
Anti-sophist said:
Does chromium effect the temperature at which sulfidation can occur? This is sort of a question meant as a plea for more information.
Click to expand...
To tell you the truth, I have no clue--I'm not a metalurgist.
I do recognize those steels as being higher strength and higher temperature than A-36.
QUite a bit stronger and temp resistant, in fact.
 
Chromium steels of about 13% Cr or more are much more resistant to oxidation and tarnish/sulfidation (hence, "stainless" steel) at normal temperatures. But I wouldn't want to try to draw any conclusions based on that for what happens at higher temperatures.

Respectfully,
Myriad
 
T. Flatley et al. “Oxidation of Iron in Atmospheres Containing Sulfur Dioxide.” Journal of the Iron and Steel Institute 209, 523, (1971).

This article is quite old, but it's a good place to start....
 
Welcome Apollo20 to the JREF Forum on CTs. I hope you find what you are looking for here...if you are looking for something...lol

TAM:)
 
rwguinn said:
To tell you the truth, I have no clue--I'm not a metalurgist.
I do recognize those steels as being higher strength and higher temperature than A-36.
QUite a bit stronger and temp resistant, in fact.
Click to expand...

A36 was used in WTC-7.
 
A thread resurrection :) Off the top of my head I'd say that Sulphidation doesn't occur below 250°C. I'm pretty sure that I've seen that given as the lower figure but I can check.
 
holy resurrection, batman! One of Frank Greening's first posts is in this thread.
 
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