Dis-similar piping materials / galvanic corrosion
Dis-similar piping materials / galvanic corrosion
(OP)
Does anyone have a any experience welding stainless steel piping components to carbon steel pipe in outside industrial applications? I've read that galvanic corrosion can be an issue. Does anyone have any experience with this, and is there a way to stop it?





RE: Dis-similar piping materials / galvanic corrosion
RE: Dis-similar piping materials / galvanic corrosion
The common approach is to have the stainless lined (such as with epoxy) for a distance from the interface and a little bit of the steel. You will also want to coat the inside of the joint itself.
On the outside of there is a chance for this pipe to get wet and it is near the sea coast then paint all of it.
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Plymouth Tube
RE: Dis-similar piping materials / galvanic corrosion
This is piping for a refrigeration system. The fluid is not corrosive, but this section of the pipe may not be insulated and would be subject to condensation and the elements.
RE: Dis-similar piping materials / galvanic corrosion
It is even more important to paint if the pipe will be insulated.
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Plymouth Tube
RE: Dis-similar piping materials / galvanic corrosion
RE: Dis-similar piping materials / galvanic corrosion
If it's in florida and exposed to atmosphere with high chloride it could be a concern also SCC of Stailess Steel. I mean if the tube is exposed to the sun (i don't know the operating temp of the tube)can reach high temp and above 60°C there is a risk of SCC. it should something to be evaluated.
Welding stainless steels to other steels
http://www.bssa.org.uk/topics.php?article=101
S
Corrosion Prevention & Corrosion Control
RE: Dis-similar piping materials / galvanic corrosion
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Plymouth Tube
RE: Dis-similar piping materials / galvanic corrosion
The fluid is ammonia.
Gents - thanks for the input and links, they have been most helpful.