Heat exchange corrosion
Heat exchange corrosion
(OP)
I have 50mm hollow 316 TUBE with 80-100 deg C air running through - on the outside of the pipe I have 17-20 deg C bore (ground) water low in calcium some iron and manganese running past the tubes. The Tubes are pitting on the outside and failing.
I considered teflon coating but this would restrict the heat transfer that I am after.
I considered SAF2205 but was too difficult to source.
Any ideas
I considered teflon coating but this would restrict the heat transfer that I am after.
I considered SAF2205 but was too difficult to source.
Any ideas





RE: Heat exchange corrosion
Try to sample the ground water for chlorides and, if possible, see if you can extract a pitted tube for metallurgical analysis to confirm the corrosion mechanism before deciding on corrective actions.
RE: Heat exchange corrosion
i believe that Metengr is right, you will find chorides. While 316 has decent pitting resistance it has poor crevice (under deposit) corrosion resistance.
The next most logical alloy option is 2205.
You should not have trouble sourcing 2205. It is made in both welded and seamless to ASTM A789. Either would be fine for you. You can also use a thinner wall then you are using now because of the higher strength.
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Corrosion, every where, all the time.
Manage it or it will manage you.
http://www.trent-tube.com/contact/Tech_Assist.cfm
RE: Heat exchange corrosion
RE: Heat exchange corrosion
I can help you if you need it.
= = = = = = = = = = = = = = = = = = = =
Corrosion, every where, all the time.
Manage it or it will manage you.
http://www.trent-tube.com/contact/Tech_Assist.cfm
RE: Heat exchange corrosion
RE: Heat exchange corrosion
= = = = = = = = = = = = = = = = = = = =
Corrosion, every where, all the time.
Manage it or it will manage you.
http://www.trent-tube.com/contact/Tech_Assist.cfm
RE: Heat exchange corrosion
How will I contact you?
RE: Heat exchange corrosion
tks
= = = = = = = = = = = = = = = = = = = =
Corrosion, every where, all the time.
Manage it or it will manage you.
http://www.trent-tube.com/contact/Tech_Assist.cfm
RE: Heat exchange corrosion
Michael McGuire
http://stainlesssteelforengineers.blogspot.com/
RE: Heat exchange corrosion
= = = = = = = = = = = = = = = = = = = =
Corrosion, every where, all the time.
Manage it or it will manage you.
http://www.trent-tube.com/contact/Tech_Assist.cfm