Hydrogen Peroxide (50%) and 316L 2

IdanPV · Nov 18, 2021

Hello all,

I would like to know if any one here has experience with Hydrogen Peroxide (50%) and SA 240-316L.
From what I read, it has excellent compatibility but only up to 48°C.

I would like to know what can be the result of using Hydrogen Peroxide (50%) in 316L vessel at Temp. of 55°C.

Any help will by good.

Thanks,

EdStainless · Nov 18, 2021

I have seen 30-35% peroxide used up to 80C.
I don't see this as worrying.

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P.E. Metallurgy, consulting work welcomed

btrueblood · Nov 19, 2021

The tank will be fine. But the decomposition rate of the peroxide may be unacceptable at that temperature.

IdanPV · Nov 20, 2021

Thanks for your answers,

btrueblood,
What does the decomposition rate means?
What test will you recommend to do in order to test the steel?

moltenmetal · Nov 21, 2021

"Decomposition rate" means that at those temperatures, 50% peroxide is falling back apart again to O2 and H2O.

It happens thermally and is also catalyzed by surfaces including the surface of 316/L.

The material is at no risk of corrosion BY the peroxide. But you would do well to pickle the surface to remove residual iron, as iron is definitely a catalyst for the decomposition of peroxide.

(

http://www.spitfireresearch.com)

btrueblood · Nov 22, 2021

Molten gave you the answer that I would have.

"What test will you recommend to do in order to test the steel?"

There are lab-level tests to measure the evolution of O2 gas with the sample material immersed in the fluid that is going to decompose. In the rocket biz, we used to do this with hydrazine, a similar chemical. The test is potentially dangerous - as the peroxide begins to decompose, it releases heat, which can bootstrap to a thermal runaway condition (think rocket engine); the water boils to steam and whoosh (or bang, if you don't give it a way to vent).

I'm sure this type of testing has been done by others, but I couldn't find any easy links to good data. A few hours in an engineering library would probably find some.

EdStainless · Nov 22, 2021

SS loves an oxidizing environment.
I see no risk with the alloy.
Handling the evolved oxygen will be your biggest issue.
And if there are any non-metals in the system they will require very very careful selection.

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P.E. Metallurgy, consulting work welcomed

IdanPV · Dec 6, 2021

Hi All,
Thanks for your answers.
I appreciate it.

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Hydrogen Peroxide (50%) and 316L 2

IdanPV

Mechanical

EdStainless

Materials

btrueblood

Mechanical

IdanPV

Mechanical

moltenmetal

Chemical

btrueblood

Mechanical

EdStainless

Materials

IdanPV

Mechanical

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