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copper (copper contact alloy, general)

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2001
DOI: 10.31399/asm.tb.aub.t61170596
EISBN: 978-1-62708-297-6
...Abstract Abstract This article explains how alloying elements affect the properties and behaviors of electrical contacts. It describes the composition, strength, hardness, and conductivity of a wide range of contact alloys and composites based on silver, copper, gold, platinum, palladium...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.pb.t51230221
EISBN: 978-1-62708-351-5
... The equilibrium contact angle, measured by the sessile drop technique, for molten metals on titanium carbide as a function of the titanium content of the braze. Test temperatures used were 1150 °C (2100 °F) for gold-, copper-, and tin-base alloys and 1050 °C, or 1920 °F for silver-base alloys. In all cases...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.caaa.t67870075
EISBN: 978-1-62708-299-0
... of a metal because of electrical contact with a more noble metal or nonmetallic conductor such as graphite in a conductive environment is called galvanic corrosion. The most common examples of galvanic corrosion of aluminum alloys in service occur when they are joined to steel or copper and exposed to a wet...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060315
EISBN: 978-1-62708-261-7
... the platinum group metals, tungsten, molybdenum, copper, copper alloys, and mercury. Aluminum is generally a poor contact material because it oxidizes readily, but it is used in some contact applications because of its good electrical and mechanical properties as well as availability and cost. Accurate...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290137
EISBN: 978-1-62708-306-5
... be brought into contact with each other to generate the interatomic forces needed to form a weld. The technique is frequently used with nonferrous metals, primarily copper and aluminum. A chart showing the combinations of metals that can be successfully cold welded is shown in Fig. 6.10 . Because welding...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300163
EISBN: 978-1-62708-323-2
... application that may even be more important than even the other tribological applications. Copper alloys are used for almost all connectors and switches. The light switches that are taken for granted everywhere consist of copper rubbing or impact contacts. The world would not have light at night or power...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630211
EISBN: 978-1-62708-270-9
... be adequate for the application. For a given metal or alloy, only certain specific environments cause this type of failure. Pure metals are much less susceptible to SCC than are impure metals, but pure binary alloys, such as copper-zinc, copper-gold, and magnesium-aluminum alloys, generally...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.pb.9781627083515
EISBN: 978-1-62708-351-5
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350011
EISBN: 978-1-62708-315-7
... chloride-dihydrate, 35 °C (95°F). Galvanic coupling due to copper salt reduction to copper metal. More severe than ASTM B 117 FACT (formerly ASTM B 538) Testing anodized aluminum specimens. Electrolyte as in salt spray or CASS test. Specimen is made the cathode to generate high pH at defects...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.pb.t51230001
EISBN: 978-1-62708-351-5
... parallel plates by capillary force Fig. 1.16 Contact angle of copper-silicon brazes of different composition on vitreous carbon substrates demonstrating the effect of driving force of alloying on wetting rate and the dependence of the equilibrium wetting angle on the reaction product, which...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2001
DOI: 10.31399/asm.tb.aub.t61170550
EISBN: 978-1-62708-297-6
... certain alloying elements, such as cadmium, in order to dispersion strengthen silver for use in electrical contacts. Brazing Alloys Electrical Contact Alloys Silver-Copper Alloys for Jewelry, Tableware, and Coinage Dental Amalgam Gold is a metal with a bright, pleasing yellow color...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2001
DOI: 10.31399/asm.tb.aub.9781627082976
EISBN: 978-1-62708-297-6
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910099
EISBN: 978-1-62708-250-1
... to hole, probably due to variation in the crevice geometry. Source: Nalco Chemical Company In seawater, localized corrosion of copper and its alloys at crevices is different from that of stainless-type materials because the attack occurs outside of the crevice rather than within. In general...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.9781627083232
EISBN: 978-1-62708-323-2
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910193
EISBN: 978-1-62708-250-1
.... Types of Underground/Soil Corrosion Galvanic Corrosion Galvanic corrosion is a concern in soils where dissimilar materials are in contact. A classic example is the use of copper alloy (brass or bronze) valves and fixtures with steel piping. The copper alloy component becomes a cathode...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.tb.ssde.t52310233
EISBN: 978-1-62708-286-0
... somehow to be made to contaminate stainless, the passive film would prevent their release. All these factors combine to make stainless the most chemically neutral metal found in food contact. Alternative alloys, such as copper and aluminum, actively leach into foods. Copper and aluminum have been linked...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290165
EISBN: 978-1-62708-306-5
... have shown that liquids placed on solid surfaces usually do not completely wet but, rather, remain as a drop that has a definite contact angle between the liquid and solid phases ( Fig. 7.3 ). The boundary between wetting and nonwetting conditions is generally taken as θ = 90°. For θ < 90°, wetting...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.caaa.t67870025
EISBN: 978-1-62708-299-0
... potential because, as shown in Fig. 5 , a small increase in potential produces a large increase in corrosion current. In particular, contact with copper and its alloys should be avoided because of the low degree of polarization of these metals. In atmospheric and other mild environments, aluminum can...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610501
EISBN: 978-1-62708-303-4
... to potential differences. In 2 xxx -series alloys, a narrow band on either side of the boundary is depleted of copper; in 5 xxx -series alloys, it is the anodic constituent Mg 2 Al 3 that forms a continuous path along a grain boundary; in copper-free 7 xxx -series alloys, it is generally considered...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.pb.t51230143
EISBN: 978-1-62708-351-5
... 260 7.2 2.9 Molybdenum 140 5.1 10.2 Titanium 15 8.0 4.5 Tungsten 174 4.5 19.3 Copper-alumina-copper 26 7.3 4.1 Copper-molybdenum-copper 166 5.5 10.0 Copper-85% tungsten alloy 180 7.2 16.1 Copper-85% molybdenum 160 6.7 10.0 Invar (Fe-36Ni alloy) 14 2.2...