Galvanic Corrosion and Electrolyte in piping
Galvanic Corrosion and Electrolyte in piping
(OP)
Hello folks,
When speaking about galvanic corrosion in piping when connecting different flanges material (Carbon steel and SS for example), and coming to the point of Electrolyte, what is the Electrolyte here? The media inside or outside the piping?
When speaking about galvanic corrosion in piping when connecting different flanges material (Carbon steel and SS for example), and coming to the point of Electrolyte, what is the Electrolyte here? The media inside or outside the piping?
RE: Galvanic Corrosion and Electrolyte in piping
RE: Galvanic Corrosion and Electrolyte in piping
Thanks for your answer, can you explain more how in the case of dissimilar flanges material be the electrolyte inside? as I think the fluid will not face the area of the dissimilar materials.
RE: Galvanic Corrosion and Electrolyte in piping
RE: Galvanic Corrosion and Electrolyte in piping
Thanks for your reply, what I ask about, inside the pipe the process fluid will not face the area where dissimilar material are present, isn't it?
RE: Galvanic Corrosion and Electrolyte in piping
You are asking a very complicated question so the only correct answer we can give is, "depends".
But I can tell you authoritatively that if you have a large ratio of steel piping to stainless you'll probably be ok. If you have a large ratio of stainless to steel you will not be ok.
RE: Galvanic Corrosion and Electrolyte in piping
Bolts electrically connect them on one side and the electrolyte (conductive working fluid) on the other.
You have a circuit and therefore likely galvanically driven corrosion.
They don't need to be wetted where they touch each other.
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P.E. Metallurgy, consulting work welcomed
RE: Galvanic Corrosion and Electrolyte in piping
For your information, another common word that may replace the term "electrolyte" is "water".
Free water (liquid phase) is the most common electrolyte that one can meet.
Regards
RE: Galvanic Corrosion and Electrolyte in piping
Some more information:
https://www.eng-tips.com/viewthread.cfm?qid=391829