H2SO4 AT LOW CONCENTRATION 2

[ROMEUM2]

Hello,
I have a commodity with a concentration of 0,5% of H2S04 and a temperature of 200ºC, and, I don't know if this concentration is very acid.
Someone can help me??

Thanks,

 

[unclesyd]

You would consider this a weak acid, but under certain conditions it could be very corrosive especially at your temperature.

One needs a little more information to give any advice.

Is the 0.5% based on vol or weight?

What form is the commodity?

What are the other ingredients?

What do you hope to accomplish?

 

[ROMEUM2]

Sorry,

0,5% vol; liquid; water.

I have to specify the material of piping.

Thanks,

 

[EdStainless]

Is there any chloride in the system? Even a few ppm could be a killer.
Look here for good tips

http://www.outokumpu.com/applications/documents/start.asp

I would suggest that you look at duplex stainless grades, but you are going to need a high alloy material for any real durability at that temperature.

= = = = = = = = = = = = = = = = = = = =
Plymouth Tube

 

[strider6]

you can calculate the pH with some chemistry calculation;
here you can find some help to select the correct material

http://www.corrosionist.com/corrosion_protection_sulfuric_acid.htm

S

Corrosion Prevention & Corrosion Control

 

[Dirki]

There is an alloy called alloy 31, which is a austenitic stainless steel. It has very good resistance angainst H2SO4.
Please find a iso corrosion diagram on page 5 in the attached material data sheet.

 

[Corgas]

Check this out.