h2o2 35% on Alu 5083 at 150°

[Tom_D1]

Hi,

In our production line we are heating h2o2 in a heater made of Alu 5083 to 150° for the disinfection of plastic bottles. After 6 months we needed to revise and clean our heater due to some sort of "limescale" formation. It only occurs at the beginning of the heater (I guess before evaporation).

Can someone help me figur out what this is?

Thanks in advance!

 

[EdStainless]

Most likely Al2O3, you are oxidizing the Al.

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P.E. Metallurgy, consulting work welcomed

 

[dik]

I'm not into this area, but I suspect the peroxide will provide a little more oxidation to the existing aluminum oxide. Aluminum oxide is pretty tough and bonds well to aluminum. I don't know what the effect of the added oxygen and heat will have... I suspect very little. I hope someone that knows can provide an answer; I'd like to know.

-----*****-----
So strange to see the singularity approaching while the entire planet is rapidly turning into a hellscape. -John Coates

-Dik