Rusted Ductile Iron Pipes 2

[jpuy]

Sir, hope you can help me.

What's the best approach to treat rusted ductile iron pipe?

I have attached a photo showing pipe current condition.

Many thanks.

 

[berkshire]

It would appear from your picture that you only have light surface rusting. is this inside a building?
It that is the case, wirebrushing or light sandblasting followed by a coating of your choice wuld be in order.
If it is outside, I would suggest sandblasting to remove old paint,checking for pitts in the surface, followed by a clear penetrating epoxy primer, then a 2 part polyurethane coating.
B.E.

The good engineer does not need to memorize every formula; he just needs to know where he can find them when he needs them. Old professor

 

[EdStainless]

Is this pipe actually under water sometimes?
If not then clean it and leave it bare.
If this gets submerged then you should blast and re-coat with a high quality product.

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Plymouth Tube

 

[jpuy]

Yes, pipe is located inside a chamber exposed in an open environment.

Often times, the chamber is flooded due to groundwater ingress from chamber coverslab joints. (ie. poor water proofing)

Thank you for the advice.

 

[bimr]

You may also consider installing a sump pump and dehumidifier. If water free and low humidity, there will be no rusting.

 

[hokie66]

What's the chain for? At first look, I took that for fairly severe corrosion of the flanged coupling, but as berkshire said, the corrosion is light.