Clarifier turbine materials selection

[kevlar49]

Does anyone have advice on what materials of construction should be for clarifier tank turbine blades?

This clarifier takes biox (treated process water) and removes metals by adding FeCl3 to produce Fe0H and HCl acid (4-6 PH). The tank has an internal coating and zinc anodes, but the turbine is not electrically connected nor coated.

I was thinking that a carbon steel with TSA or NiAlBronze would be more than adequate for this service. Not sure if I want to have an epoxy coating on the the turbine as the coating may wear from abrasion.

Any advice. Thanks.

 

[Goahead]

If no previous experience is available it seems that only testing without and with different coating systems may provide answers as to the most cost effective system practical for the application along the planned lifetime.

http://www.welding-advisers.com/

 

[EdStainless]

Many pumps handling some ugly water use stages made from NAB and NiResist. Both of these materials are canidates for your application.

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