Corrosion starting in a pipe
Corrosion starting in a pipe
(OP)
Hi everybody,
I kindly ask you an help concerning following issue:
I have found a localized corrosion in a copper tube. No other points of leakage has been found.
When sizing the tube, and examining the hole, this was characterized as an hourglass shape
- on the tube outside I localized a small crater
- on the tube inside I localized a big crater (of twice the diameter of the outside tube)
A material deposit was present in the inside part of the tube.
Unfortunately I had no possibility to realize other test, like SEM, and I have no information concerning this tube except that it was utilized for water.
Please, I kindly ask you if the above information are enough to determine if the corrosion has started from the inside or the outside of the tube.
Many thanks
I kindly ask you an help concerning following issue:
I have found a localized corrosion in a copper tube. No other points of leakage has been found.
When sizing the tube, and examining the hole, this was characterized as an hourglass shape
- on the tube outside I localized a small crater
- on the tube inside I localized a big crater (of twice the diameter of the outside tube)
A material deposit was present in the inside part of the tube.
Unfortunately I had no possibility to realize other test, like SEM, and I have no information concerning this tube except that it was utilized for water.
Please, I kindly ask you if the above information are enough to determine if the corrosion has started from the inside or the outside of the tube.
Many thanks





RE: Corrosion starting in a pipe
Regards Brian
RE: Corrosion starting in a pipe
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Plymouth Tube
RE: Corrosion starting in a pipe
RE: Corrosion starting in a pipe
To mr. BrianCNTFM
Unfortunately I haven't got any information concerning the environment.
Concerning the internal and external surface, no evidence of other holes are present.
Please, could you tell me where I can find suggested velocities for water into tubes ?
As a matter of fact I would suppose that the problem would be the excess of velocity of water, not the low velocity.
To mr. EdStainless
As a matter of fact no evidence of erosion damage into the tube,
Which could be the microbiological causes that corrode copper ?
To mr rustbuster
There is no evidence of mechanical damage
Many thanks
RE: Corrosion starting in a pipe
Any compound with nitrogen (Like Ammonia,...etc) can casue a localizes corrosion to copper/copper alloy
RE: Corrosion starting in a pipe
Nitrogen compound(Ammonia..etc) can cause a localized corrosion to the copper/copper alloy
RE: Corrosion starting in a pipe
www.corrosionist.com/copper_pipe_corrosion.htm
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Corrosion Prevention & Corrosion Control