What Are the Risks of Rust on Surgical Forceps and How Can They Be Prevented?

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Rust formation on stainless steel forceps, particularly at the V-joint where the arms are welded, raises concerns about the materials used in the welding process. Stainless steel's resistance to rust is primarily due to the presence of chromium, which forms a protective oxide layer. If this layer is compromised, as can occur at welded joints, the underlying iron can oxidize. The discussion highlights that even new forceps can exhibit rust if the welding material is not suitable or if the welding process was poorly executed. Proper welding techniques are essential to prevent issues like the formation of small holes that could harbor bacteria, potentially compromising sterilization. Suggestions for addressing rust include using nitric acid or a bunsen burner flame for sterilization.
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Hi, Does anyone work in the medical device industry seen rust forming on Stainless Steel Forceps? The rust I am seeing is at the V-joint of the forceps and I guess the soldering/welding metal is oxidizing- Anyone has experience what kind of soldering/welding materials are used for surgical stainless steel forceps?

Thanks!
 
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I don't know about the specific steel used in medical forceps, but with regards to stainless steel in general:

The main metal added to stainless steel to make it... stainless?... is Chromium. Chromium reacts with oxygen to form a thin layer on the outside of the object, whose atoms are compact enough to "ward off" oxygen in the air. If the protective layer of Chromium Oxide is removed (which will likely happen over time at the joint of the forceps), then the steel(Iron) will oxidize because it has been exposed to oxygen in the air.
 
Barfolumu said:
If the protective layer of Chromium Oxide is removed (which will likely happen over time at the joint of the forceps), then the steel(Iron) will oxidize because it has been exposed to oxygen in the air.
But the point of stainless is that the chromium is mixed into the steel rather than a pure coating like anodization, so a new layer of oxide will immediately form.

I would have thought forceps would be forged from a single peice, these are the scissor type clamps ?
 
Barfolumu and mgb_phys,

Thanks for your response. This is not a scissor type clamp, it is a classic two arm (tongs like) design. Two arms are welded at the end. My guess was that the metal used to hold the two arms is oxidizing as these are new forceps (Never used) which eliminates the possibility of chrome layer degradation with use.

Thanks again!
 
Welding stainless is tricky - it can be done well with almost all types, but you have to know what you are doing.
The concern would be if it allows small holes for bacteria to survive an autoclave, you could possibly sterilise it with a nitric acid path or a bunsen burner flame.
 
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