What is the most corrosive resistent metal?

Sword and Shield said:
Platinum is king, then gold. So, make a blade out of platinum alloyed with gold, and you're good! ;)
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Don't you mean "you're golden!"?
In any case, Titanium non-alloyed is worthless. It oxidizes so readily you'll only find it as titanium oxide, a white powder. But alloyed like military grade titanium, and it takes a long long while to oxidize. When heat anodized, it becomes even more corrosion resistant. But for a knife? Nah.

How's Vascowear rank there? ;)

WYK
 
Aaaah, am I lucky not having to explain electrochemical potential. There's also something around that called reduction/oxidation (redox) but that's too difficult for me to explain in English. HoB summed it up quite well.

Oh, and that Ti/coke/battery thing ? That's more or less how a redox reaction is showed in chemical classes :D .
 
Joe Talmadge said:
Yes, stainless steels can rust eventually. Depending on the particular stainless steel and the finish, it might be really rust resistant, or just marginally rust resistant. That is, there's a continuum of how rust resistant it will be, but all stainless cutlery steels can rust eventually. That's cutlery steels -- I don't know whether a non-steel products such as talonite will, as a practical matter, show rust.
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OIC, that' s funny. SS will rusts eventually even it is well-preserved...

What about vaccum storage of stainless steel? I mean without expose to the air... Thus will SS stays rustless forever?
 
Vascowear ranks quite poorly.

Another metal that is impervious to corrosion, that is used in the making of knives, is Liquidmetal.
 
WYK said:
Don't you mean "you're golden!"?
In any case, Titanium non-alloyed is worthless. It oxidizes so readily you'll only find it as titanium oxide, a white powder. But alloyed like military grade titanium, and it takes a long long while to oxidize. When heat anodized, it becomes even more corrosion resistant. But for a knife? Nah.

How's Vascowear rank there? ;)

WYK
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Not exactly true.
Granted, in nature you will only find titanium as an oxide (Rutile, TiO2) and pure rutile is a white powder - and it's used as a pigment in white paint because it is so 'white'.
But un-alloyed titanium is an excellent metal and very corrosion resistant. It has been alloyed, most populer being Ti-6Al-4V, to improve strength or other properities, but is widely used in its pure form.
 
Stellite might just have that metal. I took a tour of the Deloro Stellite plant in Koblenz, Germany. I have some rivets made for submarines that are composed from what I believe is F6 stellite. I was given several other pieces, one being a blade that is used to cut frozen ice cream. I left it in a tub of salt water for days with no sign of rust. Great stuff!
 
I would think Adamantium would be the best metal to use for corrosion resistance, and strength. I mean, if it can exist within the acidic conditions of Wolverine's body, and have the strength to puncture steel doors, it should work pretty good for a knife blade.

D2
 
yep, but really few custom-maker managed to work this metal.
One died recently in a lake (he had a kind of accident), and the other won't talk to you if you are not a mutant... :D
 
Daniel Dorn said:
I would think Adamantium would be the best metal to use for corrosion resistance, and strength. I mean, if it can exist within the acidic conditions of Wolverine's body, and have the strength to puncture steel doors, it should work pretty good for a knife blade.

D2
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Yeah, but it would probably be pretty difficult (and potentially lethal, him being a killer and all) to convince him to part with one of his claws to get a nice custom made :D.
 
Gold, platinum, doesn't form an oxide, reacts only with...pretty funny. When someone asks about the most XYZ metal on the Blade Discussion Forum, is it naive to assume that he's talking about blade materials? ;)
 
What about vaccum storage of stainless steel? I mean without expose to the air... Thus will SS stays rustless forever?
 
with no exposure to oxygen. SS will never rust. Rusting is the process of forming an oxide. And I stand by original post. Titanium in fact does oxide very rapidly but the oxide as described by another poster is very tight.

In a previous life I procured custom fabricated equipment used in chemical plants. The fabrication of titanium required welding in a very contolled environment to prevent contact with oxygen so the metal wouldn't go into a self sustaining oxidation (burning) due to the elevated temperature incurred during welding. I know people with more welding expertise than I have are going to jump all over this but titanium requires more sheilding from oxygen during welding than other stainless.

From my experience, the high nickel alloys are the most corrosion resistant, Inconel, Incolloy etc. Lousy knife materials.
 
I think the correct answer is Roentgenium. With a half life of only about 3.6 seconds, it really doesn't exist long enough for corrosion to form. Of course, that makes its use in cutlery rather problematic.

If one wants a practical knife that's essentially corrosion proof, I would suggest one made using obsidian rather than any metal alloy.
 
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