Water Well Corrosion
Water Well Corrosion
(OP)
The carbon steel bolts have corroded away on this 1,100 feet deep municipal water well. The well has been in service for 2 years.
The deeper column pipes have black staining.
I suspect that this is due to hydrogen sulfide. The bolts disintegrate in your hand and there is a faint odor of sulfide.
Has anyone seen this type of corrosion and the cause?
The deeper column pipes have black staining.
I suspect that this is due to hydrogen sulfide. The bolts disintegrate in your hand and there is a faint odor of sulfide.
Has anyone seen this type of corrosion and the cause?





RE: Water Well Corrosion
RE: Water Well Corrosion
RE: Water Well Corrosion
The flanges are the pump stages and are bolted together.
RE: Water Well Corrosion
RE: Water Well Corrosion
Is the pump ductile iron or Ni-Resist?
How does your pump shaft look?
The painted pipe has partially protected it, allowing the bolts to suffer full exposure.
I have seen large carbon steel anodes bolted to such pumps to provide some sacrificial protection.
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Plymouth Tube
RE: Water Well Corrosion
I will update when the pump is taked apart.
RE: Water Well Corrosion
RE: Water Well Corrosion
And oil production submersible pumps will offer some alloy availabilty if you want new pumps.
RE: Water Well Corrosion
I doubt that the piping will be very bad.
I do worry about the pump internals.
Normally I would say that this kind of attack requires air exposure, which should be zero at 1,100' in a well.
Makes me suspect MIC.
I do worry about the condition of the pump internals.
Let's wait and see.
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Plymouth Tube
RE: Water Well Corrosion
RE: Water Well Corrosion
RE: Water Well Corrosion
No other well component was observed to be corroded.
The well column pipe was stained black, most likely from iron sulfide.
RE: Water Well Corrosion