Titanium Grade 2 Fasteners for Chlorides/Moderate Strength

Q: Hello I am researching titanium and C276 hardware for a submerged application in a high chloride (20,000 mg/L) elevated temperature environment (125F). Corrosion resistance is more important than shear or tensile strength in this application.

A: Titanium screws should be a good choice for your application especially Grade 2 if the strength is not an issue. Hastelloy C276 fasteners may also be a good choice as well if your forming a lot of HCl. In terms of galling, whenever you have similar fasteners tightened on each other there is the possibility for galling. However there are a few great ways to minimize galling depending on your application needs (See the Blog Post: https://www.specialfastenersbolt.com/blog/thread-galling-what-is-it-how-to-prevent-it/).

Otherwise there are no real special precautions you would have to take other than being aware of having galvanic corrosion between dissimilar metals especially in your liquid medium.
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