passivation

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passivation

[‚pas·ə′vā·shən]

(electronics)

Growth of an oxide layer on the surface of a semiconductor to provide electrical stability by isolating the transistor surface from electrical and chemical conditions in the environment; this reduces reverse-current leakage, increases breakdown voltage, and raises power dissipation rating.

(metallurgy)

To render passive; to reduce the reactivity of a chemically active metal surface by electrochemical polarization or by immersion in a passivating solution.

passivation

Treatment of a metal surface which leaves a protective coating, rendering the surface less reactive chemically.

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References in periodicals archive ?

ABLE passivates per the ASTM A967 specification, as well as many other industry and customer-specific standards.

Electropolishing Advanced Metal Improvement Technologies

Now the Permapass trivalent passivates and Ensael top coats offer the same combination of outstanding appearance and improved corrosion resistance

A solution to the end of life vehicle directive. (Special Feature - Automotive & Robotics)

Electropolishing System allows manufacturers of high-value metallic parts to sharpen, deburr, passivate, and electropolish them in-house.

Compact Electropolishing System brings process in-house

It used to be thought that the small amount of moisture retained in a passivate could cause adhesion failure during stoving, but it is now acknowledged that the moisture combined in the passivate is not trouble, provided the components are properly dried of surface water.

Plating and painting

Trivalent chromium passivates for zinc and zinc alloys in clear, colour and black.

SurTec in the UK

The inertness of these liners is due to a new deactivation process that passivates the liner and packing so that they are inert to a variety of reactive analytes.

Inlet liners feature new deactivation process

Featuring an increased chrome-to-iron ratio and a chemically-bonded oxide surface layer, this stress free process deeply passivates and improves the corrosion-resistance of stainless steel.