passivation


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passivation

(păs″ĭ-vā′shĭn) [″]
The stabilization and protection of a surface from outside influences, e.g., the treatment of an atherosclerotic plaque to keep it from rupturing or of a metal to keep it from corroding.

passivation

the final stage in instrument manufacture, passing the finished instruments through a bath of nitric acid which removes foreign particles and promotes the formation of a protective coating of chromium oxide.

Patient discussion about passivation

Q. what is a passive smoking? and is it dangerous as an active?

A. Passive smoking is the exposure to cigarettes smoke emitted from cigarettes smoke by other person. It's dangerous and may increase the risk to several diseases similar to active smoking (one's exposure to smoke emitted from the cigarettes he or she is smoking) although the risk is of lower magnitude. Example for passive smoking is children of smokers etc.

You may read more here:http://www.nlm.nih.gov/medlineplus/secondhandsmoke.html

Q. what is it a passive smoking? and is it bad as as the active smoking? can i get cancer from it?

A. Passive smoking is the involuntary exposure of nonsmokers to tobacco smoke from the smoking of others. It is considered dangerous, and cause increased risk of cancer, although to a lesser degree than active smoking.

You may read more here:
http://www.nlm.nih.gov/medlineplus/secondhandsmoke.html

Q. Can I get lung cancer from passive smoking? All my friends smoke, can I get cancer by hanging out with them?

A. Yes, you can develop cancer by passive smoking. From what I've heard, non-smokers exposed to second-hand smoke at home or work, increase their risk of developing lung cancer by 20 percent to 30 percent.

More discussions about passivation
References in periodicals archive ?
These metal ions deposit into the passivation as hydroxides, and the larger the quantity in this layer the more the layer contracts by heating, meaning the newer the solution the less the layer contracts.
Both chemical passivation methods result in a shiny engraved surface.
The solution is to use a silicon-based layer between the resistive element and the passivation to serve as the primary moisture barrier.
4%, and rear side passivation has potentially the biggest gain of between 0.
This shows that inorganic passivation strategies can be extremely effective and there's no reason to believe that we've come anywhere close to what's possible," he says.
The new category of anti-corrosion coating can create a long-lived passivation layer that stops corrosion.
When the GaN HEMT gate length is reduced and the transistor is operated at a high voltage, however, electrons dramatically increase in speed, and as a result, a portion of the electrons can leak from the current pathway (electron channel layer), reaching as far as the passivation layer, where they will accumulate.
Passivation is the process of removing exogenous iron or iron compounds from the protective surface of stainless steel by means of a chemical dissolution i.
A second method to remove the passivation layer is to place the BA-5590/U battery in a CLU (command launch unit), turn the CLU switch to NIGHT position and turn the switch back to the OFF position.
The ability of concrete in the passivation of the steel surface was determined in concentrated water extracts from concrete modelling porous liquid.
The Model 2026 passivation tester measures the corrosion tendency of the surface of stainless steels.
Secondary operations include heat treating, electro-polishing, passivation and laser etching.