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Old 10-20-2016, 06:21 AM   #1
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Coating for mild steel blackwater tank

Anyone familiar with what commercial/industrial coatings are used to coat the interior of holding tanks made of mild steel?
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Old 10-20-2016, 06:32 AM   #2
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Greetings,
Mr. m. Don't know about the commercial/industrial end of coating systems but this product has been used for the "domestic" market. I have not personally used this specific product but have used some of their other products with great success.
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Old 10-22-2016, 06:58 AM   #3
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Take a look at Sherwin-Williams Sea Guard 5000HS Epoxy. The Navy uses a lot of it as an interior and exterior coating.

SeaGuard 5000HS Epoxy - Protective & Marine
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Old 10-22-2016, 07:43 AM   #4
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Mako

A steel holding tank? Use a non metal specifically designed sewage compatible product whether FRP, HDPE, PE etc.

That said, for a mild steel tank, construct it so top is flanged, bolted and uses a good rubber gasket. The purpose of the removable top is to provide perfect accesss for metal prep and application of a spray in two or three part DuPont coating specific for sewage work. For smaller jobs hose free specialty small spray auto shop containers are available. The nipples and fittings will deserve special attention for proper prep. Can't overemphasize adherence to metal prep protocols.

I've seen on small tanks where SS is cheaper than a specially coated mild steel tank.

Every foreign country I've worked in seems to have a decent FRP fabricator, have you pursued this route? Shipping in a non metallic tank from Italy or Turkey could be done too.
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Old 10-22-2016, 09:35 AM   #5
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Quote:
Originally Posted by makobuilders View Post
Anyone familiar with what commercial/industrial coatings are used to coat the interior of holding tanks made of mild steel?
Black water tank?
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Old 10-22-2016, 12:34 PM   #6
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Yes black water. I'll check various coatings and options as suggested above
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