there are as many as 400 different copper and copper alloy compositions loosely grouped into the categories: copper, high copper alloy, brasses, bronzes, copper nickels, copper–nickel–zinc nickel silver , leaded copper, and special alloys. the following table lists the principal alloying element for four of the more common types used in .
passivation, in physical chemistry and engineering, refers to a material becoming 'passive,' that is, less affected or corroded by the environment of future use. passivation involves creation of an outer layer of shield material that is applied as a microcoating, created by chemical reaction with the base material, or allowed to build from spontaneous oxidation in the air.
nickel is a silvery-white metal with a slight golden tinge that takes a high polish. it is one of only four elements that are magnetic at or near room temperature, the others being iron, cobalt and gadolinium.its curie temperature is 355 c 671 f , meaning that bulk nickel is non-magnetic above this temperature. the unit cell of nickel is a face-centered cube with the lattice parameter of .
the mineral or gemstone chrysoberyl is an aluminate of beryllium with the formula be al 2 o 4. the name chrysoberyl is derived from the greek words χρυσός chrysos and βήρυλλος beryllos, meaning 'a gold-white spar'.despite the similarity of their names, chrysoberyl and beryl are two completely different gemstones, although they both contain beryllium.
this is a list of named alloys grouped alphabetically by base metal.within these headings, the alloys are also grouped alphabetically. some of the main alloying elements are optionally listed after the alloy names.
galvanic corrosion also called bimetallic corrosion is an electrochemical process in which one metal corrodes preferentially when it is in electrical contact with another, in the presence of an electrolyte.a similar galvanic reaction is exploited in primary cells to generate a useful electrical voltage to power portable devices.
when added as an alloying element to aluminium, copper notably the alloy beryllium copper , iron or nickel beryllium improves many physical properties. example needed tools made of beryllium copper alloys are strong and hard and do not create sparks when they strike a steel surface. beryllium does not form oxides until it reaches very high .
the solderability of a substrate is a measure of the ease with which a soldered joint can be made to that material. good solderability requires wetting low contact angle of the substrate by the solder. solderability varies depending on the type of solder alloy under discussion. the discussion that follows applies only to unspecified .
beryllium oxide beo , also known as beryllia, is an inorganic compound with the formula beo. this colourless solid is a notable electrical insulator with a higher thermal conductivity than any other non-metal except diamond, and exceeds that of most metals. as an amorphous solid, beryllium oxide is white.
beryllium copper becu , also known as copper beryllium cube , beryllium bronze and spring copper, is a copper alloy with 0.5—3% beryllium and sometimes other elements. beryllium copper combines high strength with non-magnetic and non-sparking qualities. it has excellent metalworking, forming and machining properties.
mil-dtl-38999 circular connector receptacle and plug plated with a nickel-teflon composite. electrical or fiber-optic connectors used by u.s. department of defense were originally developed in the 1930s for severe aeronautical and tactical service applications, and the type 'an' army-navy series set the standard for modern military circular .