letsgodiving
Contributor
KrisB:One thing that hasn't been mentioned too much is choice of materials.
The *best* knife for the *longest* time will be Titanium.
Note that "stainless steel" is just that -- stainLESS, not stainPROOF. I've had SS knives start to rust within 15 minutes of exiting the water... hardly enough time to rinse them.
Titanium knives, on the other hand, don't even seem to need a rinse.
Titanium obviously resist corrosion a lot better but goos SS that is well maintained will last a long time AND it is a lot stronger. We carry Underwater Kinetics Blue-Tang hydralloy SS knife, and they have never stained or rusted. Just rinse them after each dive, and occasionally spray them with T-9, and they are like new.