Die Passivierung eines Metalls wird durch die direkte Umwandlung der Metall- oberfläche in ein Oxid verursacht. Der Vorgang der Passivierung besonders der Eisenmetalle ist dabei als Konkurrenzmechanismus von Simultanreaktionen zu verstehen, insbesondere von aktiver Auflösung, Passivierungsreaktion und Wiederauflösungsreaktionen der Passsivschicht.
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The passivation of a metal is due to the direct transformation of the metallic surface into an oxide. In particular, the passivation of the metals of the iron group is a competition between simultaneous reactions, viz. active dissolution, passivation and re-dissolution of the passivating layer.
http://www.sciencedirect.com/science/article/pii/00134686728...

Hydrogen passivation is a key process step in the fabrication of polycrystalline Si (poly-Si) thin film solar cells. In this work a parallel plate rf plasma setup was used for the hydrogen passivation treatment.
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Die Wasserstoffpassivierung ist ein zentraler Prozess in der Herstellung von polykristallinen Si (poly-Si) Dünnschichtsolarzellen. Im Rahmen der Arbeit wurde ein RF-Parallelplattenreaktor für die Wasserstoffbehandlung eingesetzt.
http://opus.kobv.de/tuberlin/volltexte/2011/2884/
(Hier nicht auf Metalle, sondern auf Halbleiter angewendet)

E-Passivation® von ArcelorMittal ist eine chromatfreie umweltfreundliche Passivierung oder temporäre Schutzbehandlung. Diese Oberflächenbehandlung besteht aus einer mineralischen (und organischen) Schicht, die Korrosionshemmer enthält. Die Passivierung wird im Durchlaufverfahren auf der metallischen Beschichtung aufgebracht. E-Passivation® ist für das gesamte Sortiment der metallisch beschichteten Stähle von ArcelorMittal erhältlich.
http://www.arcelormittal.com/fce/prd_web/new_web_details.pl?...

Passivation is the process of making a material "passive" in relation to another material prior to using the materials together. For example, prior to storing hydrogen peroxide in an aluminium container, the container can be passivated by rinsing it with a dilute solution of nitric acid and peroxide alternating with deionized water. The nitric acid and peroxide oxidizes and dissolves any impurities on the inner surface of the container, and the deionized water rinses away the acid and oxidized impurities. Another typical passivation process of cleaning stainless steel tanks involves cleaning with NaOH and citric acid followed by nitric acid (up to 20% at 120F) and a complete water rinse. This process will restore the film, remove metal particles, dirt, and welding generated compounds (ex. oxides).
In the context of corrosion, passivation is the spontaneous formation of a hard non-reactive surface film that inhibits further corrosion. This layer is usually an oxide or nitride that is a few atoms thick.
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Aluminium may be protected from oxidation by anodizing and/or allodizing (sometimes called Alodining), or any of an assortment of similar processes. (See terminology, below.) In addition, stacked passivation techniques are often used for protecting aluminium. For example, chromating is often used as a sealant to a previously-anodized surface, to increase resistance to salt-water exposure of aluminium parts by nearly a factor of 2 versus simply relying on anodizing.
Iron based (ferrous) materials, including steel, may be somewhat protected by promoting oxidation ("rust") and then converting the oxidation to a metalophosphate by using phosphoric acid and further protected by surface coating. As the uncoated surface is water-soluble a preferred method is to form manganese or zinc compounds by a process commonly known as Parkerizing. Older, less-effective but chemically-similar electrochemical conversion coatings included bluing, also known as black oxide.
Nickel can be used for handling elemental fluorine, thanks to a passivation layer of nickel fluoride.
http://www.websters-online-dictionary.org/definitions/passiv...