passivation

[pas-uh-veyt]

pas·si·vate

[pas-uh-veyt]
verb (used with object), pas·si·vat·ed, pas·si·vat·ing. Metallurgy.
to treat (a metal) to render the surface less reactive chemically.

Origin:
1910–15; passive + -ate1

pas·si·va·tion, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Passivation is always a great word to know.
So is bezoar. Does it mean:
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
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