Corrosion in cooling water tubes
Corrosion in cooling water tubes
(OP)
Corrosion is noticed in cooling water tube of a transformer cooler.It is a shell-tube heat exchanger with cooling water inside the tube.Tube is 90:10 cupro-nickel with water velocity of 0.45 metre per second.River water(not polluted) is used . Tube dia 16/14mm. After nearly 2-3 years of service localised corrosion finally result in pin hole formation in the tube.Some say it is crevice corrosion.Can any one throw some more light?What is the reason for this? How to prevent it?





RE: Corrosion in cooling water tubes
RE: Corrosion in cooling water tubes
How near the end of the tubes are the pits?
What do the tubes look like? Are there any surface deposites/residues?
The tubes should be a nice uniform dark color.
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RE: Corrosion in cooling water tubes
RE: Corrosion in cooling water tubes
You need to extract a tube for evaluation by an expert.
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Rust never sleeps
Neither should your protection
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RE: Corrosion in cooling water tubes
RE: Corrosion in cooling water tubes
Low flow in Cu alloys normaly only is a problem is there is fouling. High flow minimizes the fouling, but can lead to other problems.
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Rust never sleeps
Neither should your protection
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RE: Corrosion in cooling water tubes
RE: Corrosion in cooling water tubes
Something sounds wrong with your situation. Keep looking.
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Rust never sleeps
Neither should your protection
http://www.trent-tube.com/contact/Tech_Assist.cfm