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Home > Forums > Marine / Ocean Engineers > Activities > Saltwater corrosion engineering Forum

Nitronic 60 helicoil inserts in seawater

thread307-315013
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FAU (Marine/Ocean)
28 Jan 12 17:32
I have an application that require the use of helicoil inserts. The part will be submerged in seawater (it will be installed on a underwater vehicle). Would Nitronic 60 be a good choice? The screws are SS316. I need high strength as well, so Phosphor-Bronze may not be enough.
desertfox (Mechanical)
29 Jan 12 23:59
Hi FAU

Why not speak to the insert manufacturer?

http://www.helicoil.in/pdf/HeliCoil%20Catalogue.pdf

desertfox
FAU (Marine/Ocean)
30 Jan 12 10:50
I am in talk with them but I am still uncertain. Their manager recommended Primer-Free II coated inserts. No news on the Nitronic 60 inserts yet however.   
metengr (Materials)
2 Feb 12 22:54
According to literature I have Nitronic 60 will exhibit crevice corrosion pitting attack in seawater, and certainly 316 stainless steel screws will be even more susceptible.
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