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- Oct 5, 2005
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I had no clue that unheat-treated pot metal could rust??



The BladeForums.com 2024 Traditional Knife is ready to order! See this thread for details:
https://www.bladeforums.com/threads/bladeforums-2024-traditional-knife.2003187/
Price is $300 $250 ea (shipped within CONUS). If you live outside the US, I will contact you after your order for extra shipping charges.
Order here: https://www.bladeforums.com/help/2024-traditional/ - Order as many as you like, we have plenty.
It looks like the blade is bead blasted. This can also make a knife more susceptible to rusting as well.
One thing to remember, just because it's stainless, doesn't mean that it's rustless.
If this were true, then freshly ground stainless steel would be expected to rust and not form an "oxide layer." Perhaps you are thinking of aluminum where this is very true. Aluminum oxidized readily and freshly ground or sanded aluminum will rapidly form an oxide layer, which protects the underlying metal from oxidizing. However, iron oxide is rust, plain and simple. Stainless can be stained or rusted, it just stains less.
Yup that too.No, they need to bring back good heat treats and decent steels.
In my opinion anyhow...
A world reknowned knife for good reasons. Definately a classic.Back in the day I just figured the Gerber Mark II was a classic design the exemplar of that particular knife type a design that had been around for decades.
In 1913, English metallurgist Harry Brearly, working on a project to improve rifle barrels, accidentally discovered that adding chromium to low carbon steel gives it stain resistance. In addition to iron, carbon, and chromium, modern stainless steel may also contain other elements, such as nickel, niobium, molybdenum, and titanium. Nickel, molybdenum, niobium, and chromium enhance the corrosion resistance of stainless steel. It is the addition of a minimum of 12% chromium to the steel that makes it resist rust, or stain 'less' than other types of steel. The chromium in the steel combines with oxygen in the atmosphere to form a thin, invisible layer of chrome-containing oxide, called the passive film. The sizes of chromium atoms and their oxides are similar, so they pack neatly together on the surface of the metal, forming a stable layer only a few atoms thick. If the metal is cut or scratched and the passive film is disrupted, more oxide will quickly form and recover the exposed surface, protecting it from oxidative corrosion. (Iron, on the other hand, rusts quickly because atomic iron is much smaller than its oxide, so the oxide forms a loose rather than tightly-packed layer and flakes away.) The passive film requires oxygen to self-repair, so stainless steels have poor corrosion resistance in low-oxygen and poor circulation environments. In seawater, chlorides from the salt will attack and destroy the passive film more quickly than it can be repaired in a low oxygen environment.
... I have heard rumors that some of their stuff is now made in China.
Now, I've been keeping knives in old surplus ammo boxes for years and with a packet or two of desiccant I've never had trouble with anything developing rust of any kind. But this Gerber has developed light surface rust on its Surgical Stainless, 400 series steel:jerkit: