verb (used with object), passivated, passivating. Metallurgy.
to treat (a metal) to render the surface less reactive chemically.

1910–15; passive + -ate1

passivation, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
passivate (ˈpæsɪˌveɪt)
(tr) to render (a metal) less susceptible to corrosion by coating the surface with a substance, such as an oxide

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