Acid cooling material

[tarun7007]

Hello. Im tarun
I need to cool sulphuric acid(98% pure, AR Grade, 20% wt/v) for anodising purpose. I was sugested to use lead coils as cooling system. Can i use my household water pipes for cooling acid. AS it is very cost efficient and readily available in stores.
Please can anyone suggest drawbacks of using water pipe or a better way for cooling acid. Suggestion would be greatly appricated. Thank you very much.

 

[EdStainless]

What is the max temp that you will see?
What other impurities are in the acid (metals or salts)?
Lead is very soft and very sensitive to flow effects (both the water side and the acid side).
If the acid is clean and temps are low then 304L SS may be the best bet.
I have seen coils where hair-pin bent tubes hang into the tank, and then they are connected to each other outside of the tank. This keeps any welds out of the acid.
There is a whole list of alloys specialized for H2SO4 service.

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P.E. Metallurgy, consulting work welcomed

 

[hacksaw]

What is the anodizing tank made of

 

[hacksaw]

If you anodizing small batches with 98% acid. Put your water in the tank, then add the acid, gradually. Do not add water to acid, it is a mess.

When you are adding the water, measure the water temp, gently stirring to insure even distribution of heat. Let the vat cool down to room temperature.

With small batch anodizing, you only have limited electrical heating measured in waters, monitor the batch temp from time to time. When finished let it cool down to room temperature.

If you need cooling 24 hours a day for an industrial production, you need a complete mechanical and piping design.

 

[hacksaw]

Should have said when you are adding the acid to the water, getle stirring to mix, check the temperature.
At you dilution levels it should get too hot.