Propellant corrosion for 405 and carbon steels? 1

[MagBen]

Anyone has info. regarding the compatibility of 405 and carbon steels with rocket propellants such as hydrazine, mono methyl hydrazine (MMH), nitrogen tetroxide (NTO) and nitrogen tetroxide with 3% nitric acid (MON3)?
Thanks in advance!

 

[EdStainless]

Ben,
There is a NASA publication on this, but I can't find my copy.
No steels, that is for sure. Nothing that can rust.

Look here

https://standards.nasa.gov/documents/nasa

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P.E. Metallurgy, Plymouth Tube

 

[MagBen]

Thanks Ed! I have an alloy with regular corrosion resistance between CS and SS, I am guessing such an alloy could not work well in rocket fuel. Protective coatings could be helpful.

 

[btrueblood]

Plain carbon steel will cause the hydrazines to catalytically decompose, and the level of dissolved iron in the fuels will rise over time.

Nitric acid and NTO will etch/dissolve the steel.

A fairly good discussion, with a plethora of references, is available in Eckhardt Schmidt's Hydrazine and its Derivatives. If you are in the business of storing rocket fuels, this is your book.