passivity

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passivity

[pə′siv·əd·ē]
(chemistry)
A state of chemical inactivity, especially of a metal that is relatively resistant to corrosion due to loss of chemical activity.
(metallurgy)
The property of a metal that has been made passive.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.