[chemistry] Passivation, in physical chemistry and engineering, refers to a material becoming `passive,` that is, being less affected by environmental factors such as air and water. Passivation involves a shielding outer-layer of base material, which can be applied as a microcoating, or which occurs spontaneously in nature. As a technique, ...
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http://en.wikipedia.org/wiki/Passivation_(chemistry)
[spacecraft] The passivation of a spacecraft is the removal of any internal energy contained in the vehicle at the end of its mission or useful life. Spent upper stages are generally passivated after their use as launch vehicles is complete, as are satellites when they can no longer be utilized for their initial design purpose. For satellit...
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http://en.wikipedia.org/wiki/Passivation_(spacecraft)

A chemical reaction that eliminates the detrimental effect of electrically reactive atoms on a photovoltaic cell's surface.
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http://www.electromn.com/glossary/p.htm

(1) A reduction of the anodic reaction rate of an electrode involved in corrosion. (2) The process in metal corrosion by which metals become passive. (3) The changing of a chemically active surface of a metal to a much less reactive state. Contrast with activation.
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http://www.encyclo.co.uk/local/20742

A chemical reaction that eliminates the detrimental effect of electrically reactive atoms on a solar cell's surface.
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http://www.encyclo.co.uk/local/21690

Metals and alloys are made less corrosive through surface treatment to produce a thin and stable ine
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http://www.encyclo.co.uk/local/22411

The changing of the chemically active surface of a metal to a much less reactive state. Contrast with activation.
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https://steelforge.com/literature/steelog-the-5000-word-metals-glossary/

When exposed in air, stainless steels passivate naturally (due to the presence of chromium). But the time required can vary. In order to ensure that the passive layer reforms rapidly after pickling, a passivation treatment is performed using a solution of nitric acid and water.
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https://www.countryknives.com/knife-knowledge/steel-glossary/

A chemical reaction that eliminates the detrimental effect of electrically reactive atoms on a photovoltaic cell's surface.
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https://www.encyclo.co.uk/local/22819

When exposed in air, stainless steels passivate naturally
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https://www.ssina.com/education/glossary/

Changing of a chemically reactive metal surface to a less reactive state, typically through chemical treatment
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https://www.steelonthenet.com/files/glossary-5.html

The changing of the chemically active surface of a metal to a much less reactive state. Contrast with activation.
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https://www.unifiedalloys.com/resources/glossary/
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