Quote:
Originally posted by xoxoxoBruce
I remember reading somewhere, 2 tons of steel will produce 3 tons of rust, but it didn't say why. I've always been curious about that, but don't have a clue how I would find out. 
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Simple chemistry. Pure steel is made of iron and carbon. When it rusts, it adds oxygen to the mix. So what your quoted statistic is saying is that for every 2 parts (by weight) iron and carbon in rust (carbon makes up about 5%, I think), there's one part oxygen.