- Joined
- Nov 19, 2008
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- 2,671
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I believe brass liners were used for more reasons than just rust. Possibly lighter weight and easier to work than steel. Same with nickel silver. Brass can discolor and get oxidation as well.
Probably worth mentioning that Brass is frequently used when low friction is needed(watches, locks, hinges, etc...) as its pretty slippery. Can't think of a better choice of material for a knife liner than that.
I used to use an old electrician's knife that was all steel when I worked on the river and never had an issue with rust in the pivot. I'd think that opening and closing the blade would rub off any rust that might be forming before it really can if that makes sense.