Galvanic reaction, Monel metal and Titanium
Galvanic reaction, Monel metal and Titanium
(OP)
I have just seen a proposed heat exchanger with Titanium ( Grade 2) tubes and Alloy 400 tubesheets. The heat exchanger cools saturated brine. The galvanic action between these metals is much the same as between Stainless steel and Mild steel. Would it be reasonable to expect the titanium tubes to have a short life ??
I cannot believe that the Designer has overlooked this possibility, but I have no experience of titanium.
I would much appreciate any comments.
Corrosionman
I cannot believe that the Designer has overlooked this possibility, but I have no experience of titanium.
I would much appreciate any comments.
Corrosionman





RE: Galvanic reaction, Monel metal and Titanium
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Plymouth Tube
RE: Galvanic reaction, Monel metal and Titanium
For some background the process is a saturated brine (potash) slurry. Running at fairly high temperatures (250-300F).
RE: Galvanic reaction, Monel metal and Titanium
at the risk of supporting your thread hijacking I'll respond.
I don't think that you are seeing galvanic attack.
I would not expect Monel to like brine service, and Ni-Cr-Mo welds may not be too good either.
At you temps I would even worry about Ti gr2. The CP grades can pit under these conditions.
Full Ti constructions with alloyed grades would be a better solution.
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Plymouth Tube