Will it work with shaved aluminum , like raking my knife against aluminum block ?    Ground rust should be easy to get .  

Neat trick if it works !  

I'm guessing a 50/50 mix ?

@MMRanch,

From what I've seen of it, it appears that they both need to be powdered 50/50 and mixed with some sort of binder to hold it together. You start with Iron oxide and aluminium and you end up with Iron and Aluminium oxide.

The Aluminium just rips the oxygen off the rust. It's called a thermite reaction and there is apparently a lot of different metals that are used but the Al and Fe oxide appear to be the fiercest.  

@IR, not yet but I'm working on it, there's a lot of videos of it on youtube. For railways, they leave about an inch of space between the pieces that need to be joined, heat it all up, then light the touch fuse. The slag floats to the top and the molten iron pours out and the slag overflows.

That's tannerite.
Look up tannerite hog hunting..
It's a blast.

Now i know how badly I irritate Eegore.

Re: Rust plus aluminium when ignited boils iron.
Reply #4 - 03/28/20 at 16:27:10Alert Board Moderator about this Post! Quote That must be like those "Fire Starters"  you shave off some of the  block then throw a spark into it.
........................

But :   What if you shaved the WHOLE BLOCK !   Huh
................................

I've seen those blocks that you can shoot to explode them , how/what are they ?


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Re: Rust plus aluminium wheu n ignited boils iron.
Reply #5 - 03/28/20 at 16:49:41Alert Board Moderator about this Post! Quote Modify Remove That's tannerite.
Look up tannerite hog hunting..
It's a blast.

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Re: Rust plus aluminium wheu n ignited boils iron.
Reply #6 - Yesterday at 09:00:49Alert Board Moderator about this Post! Quote @JoG, it's not tannerite, which is explosive. This stuff just gets hot. Like about 4,500F, iron melts at 2,700F

@MMRanch, that would be a block of magnesium.      


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Re: Rust plus aluminium when ignited boils iron.
Reply #7 - Yesterday at 15:07:13Alert Board Moderator about this Post! Quote Modify Remove Now i know how badly I irritate Eegore.
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Re: Rust plus aluminium when ignited boils iron.
Reply #8 - Today at 06:31:07Alert Board Moderator about this Post! Quote
"Now i know how badly I irritate Eegore. "

What?
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I've seen those blocks that you can shoot to explode them , how/what are they ?


Yeah, its Tannerite that commonly seen that upon being shot, they blow up..

And I so often dont follow you, and force an explanation that sjhouldnt be needed,,

I remember seeing a film of this rail welding technique when I was at high school a few years ago. I think magnesium did have a part to play in it.

"Now i know how badly I irritate Eegore."

What did you mean when you typed this?  I hadn't even commented on this thread.