[vladvasiliu]

> I’ve never found a salt grinder able to sustain the salt corrosion in the long run

There are ceramic grinders now. I'd expect those to not rust, but I don't know how long they stay sharp.

[erikpukinskis]

You can make ceramics harder than the hardest steel so staying sharp shouldn’t be a problem.

[carlmr]

I've had ceramic salt grinders for years now. Anecdotally you're right, never thought about replacing them.