Active Metal

Active Metal

A term of art for any highly reactive metal—e.g., Mg2+ or Na+—which reacts with other elements. Most active metals are located in the first two columns of the periodic table.
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We will perform well developed gold-catalysed isomerisation reactions and intercept carbenoid intermediates through a transmetallation event with a more redox active metal such as palladium (0).
Among the topics are strength and margins of brazed joints, brazing diamonds and cubic boron nitride, active metal brazing of advanced ceramic composites to metallic systems, coating techniques using brazing, and the fluxless brazing of aluminum
Titanium is an active metal and it is oxidized quickly and forms a sticky layer of titanium oxide on the surface of titanium, which prevents the next stages of the reaction.
Meanwhile, active brazing does not require a metalized layer because it is a method that enables direct joining to ceramics with a single application of heat by improving the wettability (ease of application) to ceramics by adding active metal such as Ti, zirconium (Zr), hafnium (Hf), etc.
Hebburn Neighbourhood Inspector Ian King added: "We have increased patrols in the area and are using intelligence gathered to focus our efforts on active metal thieves.
From an aqueous corrosion standpoint, an active metal is one that will spontaneously react in normal aqueous environments under ambient conditions without the application of any external force or energy.
Recently efforts have made to eradicate neurological deposits and reverse redox active metal ion contributions to oxidative stress.
Ammunition using the radio active metal has contaminated land in Iraq and parts of the former Yugoslavia.
Various metal (Cu, Ni, Ag) or metal alloy foams (Cu-Ni, Fe-Ni, Ni-Cr, Fe-Cr-Ni) have been used as catalytic supports or active metal catalysts for alcohol partial oxidation to aldehydes (Pestryakov et al.
Key statement: A conjugated diene rubber obtained by a process wherein active conjugated diene polymer chains, each having an active metal at a polymer chain terminal, which have been obtained by polymerizing a conjugated diene monomer alone, or a conjugated diene monomer and an aromatic vinyl monomer with the aid of an organic active metal in an inert solvent, are allowed to react with a specific polyorganosiloxane capable of reacting with the active metal bonded to the polymer chain terminal.
For active metal alloys, the currently utilized bulk alloy specifications do not appear sufficient for ensuring a particular corrosion activity.