passive metal

passive metal

[′pas·iv ′med·əl]
(metallurgy)
A metal on which a surface film forms by natural process or by immersion in a passivating solution, making the metal resistant to corrosion.
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(5) The enhanced corrosion protection performance of the EPGN coating was attributed to the redox catalytic capabilities of amino-capped aniline trimer (ACAT) units existing in the EPGN, which were thought to induce the formation of passive metal oxide layers on the CRS electrode.
We also prevent important sources of drinking water from being polluted.Working with our partners we ve now built and are managing our first ever passive metal mine water treatment scheme to address the pollution which comes from Force Crag Mine in the Lake District National Park.The scheme has been carefully designed to be consistent with the beautiful surroundings and address this major source of metal pollution, which affects Bassenthwaite Lake and other local watercourses.
Designed for locking and sealing fasteners that may need to be disassembled during their service life, this anaerobic threadlocker now provides enhanced performance on both active and passive metal surfaces including steel, stainless steel, and plated materials.
In other words, Nb is an active metal that will appear to be noble due to the formation of a passivating layer (i.e., a passive metal, or in the older literature, a valve metal) (37).
It performs equally well on both active and passive metal surfaces including stainless steel and plated material without the use of a primer.
Henkel has developed two Loctite anaerobic retaining compounds that perform at operating temperatures up to 180AC and show very reliable cure strength through oil contaminations and on passive metal surfaces.
Rapid development of prototypes Achieving fast fixture on passive metal substrates such as nickel and other plated surfaces is quite a challenge for an anaerobic threadlocker, especially if requirements also call for good sealing performance and high strength, as well as very good thermal and shock resistance, the company observed.
Differential aeration cells are prone to causing localized corrosion at pits (crevice corrosion) in materials such as stainless steel, aluminum, nickel and other passive metals when they are in contact with seawater etc.
[129] developed a model to describe the effect of mechanical and material parameters on the wear-assisted corrosion rate of passive metals in two-body sliding contacts.
The company says as well as being more tolerant of oil, this medium strength, anaerobic sealant for all coarse threads also has greater temperature resistance and improved curing on passive metals such as stainless steel.
It is common that the passive metals undergo localized corrosion (pitting or crevice corrosion) in chloride environment, such as physiological solutions, due to the development of occluded cells.
The two opening papers propose a method for generating wear maps of stainless steels subjected to aqueous slurry, and compare models of tribo-corrosion in passive metals under sliding and rubbing conditions.