water injection questions

[Michael D. Porter]

> | Just a cautious thought out of the blue (i.e. I don't know the
> | answer) ... it might be a good idea to check on the corrosiveness
> | first, especially if you have aluminum heads.  Any chemists out
> | there?
> | Anthony Tsakiris
> |
> 
> This topic came up on the hotrod list some time ago.  the peroxide you buy
> in the store is too dilute to do any good.  Anything stronger is very
> corrosive.  Aparently peroxide was used as rocket fuel a long time ago.
> 
> --steve

Quite correct, Steve.  The use I remember is in the Messerschmidt ME-163 
rocket plane.  As I recall, pure H2O2 is a sufficiently strong oxidizer 
that it can burn skin on contact.  There were problems with tank 
integrity in the planes, and they occasionally leaked.  Made for an 
unpleasant flight, from the pilot interviews I've seen.
Cheers.