Iron and rust-formerly why don't engine blocks crack too?

From: King (landy@pacificcoast.net)
Date: Fri Jan 14 2000 - 07:55:15 PST


>The closer you get back to the mother iron, the less you have to worry
>about rust.
>
>True again. For example, riveted iron hull plates of the steamer "GREAT
>EASTERN", the first huge ocean going riveted iron liner built in England
>in the nineteenth century and lost on a reef in the Faulkland Islands,
>can still be seen today protruding above the waves, covered only by
>surface rust. Comparable steel ships have long since crumbled into scale....
>
>
>Regards,
>Mel Miller
>M725

I have a theory on this rust and old iron.I have seen the same with the
early Land Rover frames.Most series ones are still in good order frame wise
where as early and late series threes can rust out in 3 years given the
right conditions.At first there was an argument going around about how
positive ground is better than negative ground and that this has more to do
with the speed of the rusting.I don't buy it.
My theory is that the more pure the steel or iron source,the longer it will
last.Todays steel and iron has to much recycled crap in it and like cancer
once the cells are there it spreads.I think hardening might have something
todo with it as well.I can remove early series one bolts most of the time
with little or no problems and they are very reusable where as one year plus
on some of this new hardware and it breaks off by trying to remove it.
Oh yeah the date on my computer should be fixed soon.I am looking for a new one.
Andre



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