Acid soak bath design

What are the parts made of? 95% sulphuric acid at 60degC is quite aggressive, and it gets worse if water is brought near it!

PVDF is a popular material for pipework.

http://www.coleparmer.co.uk/techinfo/ChemComp.asp

Sulphuric acid has a high heat-of-dilution. Then, everyone knows to add acid to water and not water to acid, surely?

...don't know, but this is a repeat set up. so I'm not really concerned. I've been given a process spec, but comments such as "supplier to advise" scare me a bit!! I've considered constructing the whole thing from PVDF, as I note that any of the more available stainless steels degenerate with this stuff at elevated temps. by incorporating a hot air drying cycle after de-i soaking, I'm hoping to reduce,eliminate the cross contamination problem. Thanks for your coments

If it's a repeat set-up, why not copy the original set-up?

.....the acid is t be drained back into it's holding tank before the water is added. There should only be a residual amout of acid in the tank when the water is added. I understand that this is how the process works in the UK. This system is a new start up in China and is, I am told simply a repeat system. Maybe I need to go and view the existing system.

<...Maybe.....go and view the existing system.....>

Always highly recommended. There is often no need to reinvent the proverbial wheel.

Quite so - all too often what is reinvented is the flat tire. Viewing what's to be replicated can sometimes point up errors, oversights, and misfires!