Inconel and Ammonium Hydroxide Compatibility

Thanks. I searched, what I thought was everywhere, and couldn't locate. You have been a great resource.

There are many material compatibility charts available online (do a google search). It is worth cross-checking between two or three of them, rather than relying on one.

You need to be clear in your mind what you mean by compatibility. Is any corrosion permissible? If so, what is the permissible corrosion rate? Charts often don't show this, but a corrosion rate that is acceptable for a centrif pump or pipework would not be acceptable for equipment with close-running clearances, eg side-channel pumps, gear pumps & mech seals.

You might be hard pushed to find anyone who will give you actual proof. NACE (National Association of Corrosion Engineers) used to do a very comprehensive book that gave actual corrosion rates for a wide range of materials and fluids. To be sure, you might want to do a dip-test yourselves.

The Cole Parmer materials compatibility database.

That's one of the ones I tend to use. Quite comprehensive.

I just went on Cole-palmers site and they don't list Inconel x-750. An answer was found www.balseal.com. Tech library - Tech reports - TR-60C