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The Science Of Rust?

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#1 glgrumpy ONLINE  


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Posted July 11, 2013 - 01:02 AM

I tear down and blast just about every part of the tractors I rebuild. I've seen plenty of rust. I'm now in middle of working on my PK and have many parts really rusty and when blowing it off, there is still some Black stuff underneath that comes off very hard IF at all in some cases. I have taken my needle scaler and hit on some to break up, but many times IT just bounces off. I can blast and hold on it for long time and it will get out eventually and sometimes not if way down in a deep pit. You are left with many pits when it is all cleaned off the parts. SO, what is This stuff and why so much tougher than just the rust alone?  If rust is Iron Oxide, the oxegen and iron working together, what is this black stuff?

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#2 jd.rasentrac OFFLINE  


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Posted July 11, 2013 - 01:50 AM

Are you speaking from black, flaky rust parts? I got this one when using a steel brush on the power drill. And, this flakes look very greasy - isn't it?

#3 Alc ONLINE  



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Posted July 11, 2013 - 05:32 AM

Do you think any rust treatment product  was applied at some time by the po  and that's what  is in the pitted areas  ?

#4 LilysDad ONLINE  


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Posted July 11, 2013 - 06:26 AM

There are two kinds of rust. I'm not a iron oxide expert, but the other kind is the stuff that makes your gun blue. Wouldn't electrolysis be easier?

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