J
jesterjay8
Can you handle passivated parts without wearing gloves?
Mikishots
Trusted Information Resource
Re: Handling of passivated parts
Depends on the next step. If it's destined for paint, you'd be advised to wear gloves or wrap the item in plastic or Kraft paper to prevent contamination. If you're asking about any dangers to your health, there is no need for concern.
Depends on the next step. If it's destined for paint, you'd be advised to wear gloves or wrap the item in plastic or Kraft paper to prevent contamination. If you're asking about any dangers to your health, there is no need for concern.
Kales Veggie
People: The Vital Few
Yes, you can, but probably not advisable for quality reasons.
It depends on what and why you are passivating.
Passivation is a cleaning process. Its original intent is to clean free iron from stainless steel as free iron will rust. Free iron can be on the surface of stainless steel for a variety of reasons, including rubbing against ordinary steel.
There are several methods of passivation, with a common one being a nitric acid wash / dip. A less harsh one uses citrus cleaners.
Sometimes passivation is used for other than the original purpose, mainly for sterilization. It is common for some medical equipment to include passivation for sterilization.
Passivation to prepare stainless steel for welding generally would tolerate handling bare handed. Passivation for sterilization would not.
Passivation is a cleaning process. Its original intent is to clean free iron from stainless steel as free iron will rust. Free iron can be on the surface of stainless steel for a variety of reasons, including rubbing against ordinary steel.
There are several methods of passivation, with a common one being a nitric acid wash / dip. A less harsh one uses citrus cleaners.
Sometimes passivation is used for other than the original purpose, mainly for sterilization. It is common for some medical equipment to include passivation for sterilization.
Passivation to prepare stainless steel for welding generally would tolerate handling bare handed. Passivation for sterilization would not.
AgnieszkaSz
Involved In Discussions
Big Jim's advice is superb; I might just add that when you passivate before painting, the created layer is porous so that the paint is absorbed and the adhesion is better. Tiny amounts of grease present usually on human hands will disturb this process.
R
Ray Kremer
Apologies for jumping in so late.
If this question is "Will touching the stainless harm the passive layer?" the answer is no. But that doesn't mean there isn't some other reason the surface needs to be kept clean of skin oils, such as another coating is going to be applied, or it's a medical part.
If this question is "Will touching the stainless harm the passive layer?" the answer is no. But that doesn't mean there isn't some other reason the surface needs to be kept clean of skin oils, such as another coating is going to be applied, or it's a medical part.
This isn't technically proper, by the way. The passivation acid should not be replied upon for sterilization. The alkaline cleaner often used as a preclean for passivation, however, can be.
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