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platinum-group metal anodes

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2001
DOI: 10.31399/asm.tb.aub.t61170550
EISBN: 978-1-62708-297-6
... Abstract This article discusses the compositions, properties, and uses of silver, gold, and platinum group metals, including platinum, rhodium, iridium, ruthenium, and osmium. It describes the role of various alloying elements and explains how they affect physical, mechanical, and electrical...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030184
EISBN: 978-1-62708-282-2
... currents. Precious metal anodes are platinized titanium or tantalum anodes; the platinum is either clad to or electroplated on the substrate. The small precious metal anode shown in Fig. 17 performs the same function as materials weighing several times more. Fig. 17 Precious metal impressed...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060315
EISBN: 978-1-62708-261-7
..., molybdenum, tungsten, and rhenium. With the exception of two platinum group metals—osmium and indium—refractory metals have the highest melting temperatures of all metals. Tungsten has the distinction of having the highest melting temperature of all elements (3410 °C, or 6170 °F). All refractory metals...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030180
EISBN: 978-1-62708-282-2
... been used for cathodes in anodic protection systems. These cathode and chemical environment combinations include: Cathode metal Environment Platinum on brass Various Steel Kraft digester liquors Illium G (Ni Cr Cu) Sulfuric acid (78–105%) Silicon cast iron Sulfuric acid (78–105...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240597
EISBN: 978-1-62708-251-8
... Abstract This chapter discusses the compositions, properties, and applications of nonferrous metals, including zirconium, hafnium, beryllium, lead, tin, gold, silver, and platinum group metals. It also addresses fusible alloys and provides melting temperatures for several compositions...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030019
EISBN: 978-1-62708-282-2
... vessels have been destroyed by contact with cooling coils or agitators made of less noble alloys. Tantalum is susceptible to attack by alkalies, such as may form in the vicinity of a cathode in neutral solutions. Noble Metals The term noble metal is applied to silver-, gold-, and platinum-group...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480331
EISBN: 978-1-62708-318-8
... (and oxidizing) halide environments. Other platinum-group metals and lower-cost titanium-palladium alloy grade 16 can be used in less aggressive environments. Interest in the addition of ruthenium, a metal similar to palladium, is increasing due to its lower cost (approximately 7 times less expensive than...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350011
EISBN: 978-1-62708-315-7
... or region on a metallic surface with a negative charge, (c) a second area with a positive charge, and (d) an electrically conductive path between (b) and (c). These components are arranged to form a closed electrical circuit. In the simplest case, the anode would be one metal, such as iron, the cathode...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240323
EISBN: 978-1-62708-251-8
... is the principal reaction. Electrons flow toward the cathode in the external circuit. The cathode does not corrode. A metallic path is an external circuit to complete the connection between anode and cathode. Fig. 18.1 A corroding system. Source: Ref 2 If any one of these four conditions...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120123
EISBN: 978-1-62708-269-3
... to dissolve anodically Increase the tendency of titanium to passivate The first group includes noble metals, such as platinum, palladium, and rhodium. The second includes nickel, molybdenum, and tungsten. The third group includes zirconium, tantalum, chromium, and, possibly, molybdenum. Cathodic...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030380
EISBN: 978-1-62708-282-2
... cathodic and anodic areas on metallic surfaces. electrochemical equivalent. The weight of an element or group of elements oxidized or reduced at 100% ef ciency by the passage of a unit quantity of electricity. Usually expressed as gram-equivalents per coulomb. electrochemical impedance...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910407
EISBN: 978-1-62708-250-1
... fabricated from other materials. Precious metal anodes are actually platinized titanium or niobium anodes; the platinum is either clad or electroplated on the substrate. Platinized anodes are used in marine work on ships, hulls, and for applications involving the interior parts of structures...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.9781627082822
EISBN: 978-1-62708-282-2
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910497
EISBN: 978-1-62708-250-1
..., and the reduction of an 500 Corrosion: Understanding the Basics element or group of elements from a higher to a lower valence state. Contrast with anode. cathodic corrosion. Corrosion resulting from a cathodic condition of a structure usually caused by the reaction of an amphoteric metal with the alkaline products...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.9781627082501
EISBN: 978-1-62708-250-1
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610501
EISBN: 978-1-62708-303-4
... away from the anode in the external circuit. It is the anode at which corrosion occurs and metal ions enter solution. The electrolyte is an electrical-conducting solution that contains ions, which are atomic particles or radicals possessing an electrical charge. The electrolyte is a conductive...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120085
EISBN: 978-1-62708-269-3
... to develop or to enhance specific properties, such as lubricity or wear resistance. In addition to coatings for lubricity, titanium is coated or plated with corrosion-resistant metals (e.g., copper and platinum) as an alternative to oxide formation or as the basis for subsequent plating. Coatings...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2000
DOI: 10.31399/asm.tb.fec.9781627083027
EISBN: 978-1-62708-302-7
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2001
DOI: 10.31399/asm.tb.aub.t61170417
EISBN: 978-1-62708-297-6
... in the positive direction (cathodic alloying), (b) increase the thermodynamic stability of the alloy and thus reduce the ability of the titanium to dissolve anodically, or (c) increase the tendency of titanium to passivate. The first group includes noble metals such as platinum, palladium, and rhodium. The second...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.caaa.t67870191
EISBN: 978-1-62708-299-0
... in the plant ( Fig. 3 ). In such instances, the ideals of a total design concept become especially apparent, but usually they appear in hindsight. Direct contact of dissimilar metals introduces the possibility of galvanic corrosion, and small anodic (corroding) areas should be avoided wherever this contact...