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Dezincification

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Image
Published: 01 November 2012
Fig. 9 Plug-type dezincification in an α-brass (70Cu-30Zn) exposed for 79 days in 1 N NaCl at room temperature. Note porous structure within the plug. Dark line surrounding the plug is an etching artifact. Total width shown is 0.56 mm (22 mils). Source: Ref 3 More
Image
Published: 01 December 2015
Fig. 2 Plug-type dezincification in an α-brass (70Cu-30Zn) exposed for 79 days in 1 N NaCl at room temperature. Note porous structure within the plug. Dark line surrounding the plug is an etching artifact. Total width shown is 0.56 mm (2.2 mils). More
Image
Published: 01 December 2015
Fig. 3 Uniform-layer dezincification in an admiralty brass 19 mm (3/4 in.) diameter heat-exchanger tube. The top layer of the micrograph, which consists of porous, disintegrated particles of copper, was from the inner surface of the tube that was exposed to water at pH 8.0, 31 to 49 °C (87 More
Image
Published: 01 June 2008
Fig. 18.14 Plug-type dezincification in an α-brass (70Cu-30Zn) exposed for 79 days in 1 N NaCl at room temperature. Note porous structure within the plug. Dark line surrounding the plug is an etching artifact. Total width shown is 0.56 mm (22 mils). More
Image
Published: 01 June 2008
Fig. 25.19 Plug-type dezincification in α brass. Original magnification: 160×. Source: Ref 10 More
Image
Published: 01 January 2000
Fig. 47 Layer-type dezincification of a brass pump component. The dark (red) outer layers are uniformly corroded regions surrounding the uncorroded metal (original yellow) of the brass. Source: Nalco Chemical Company More
Image
Published: 01 January 2000
Fig. 48 Layer-type dezincification of a thin brass sheet. The 0.48 mm (0.019 in.) sheet is shown in cross section. The dezincified layers converge toward the edge (left side) of the sheet. Note the porosity of the dezincified metal. Source: Nalco Chemical Company More
Image
Published: 01 January 2000
Fig. 50 Plug-type dezincification in an α-brass (70Cu-30Zn) exposed for 79 days in 1 N NaCl at room temperature. Note porous structure within the plug. The dark line surrounding the plug is an etching artifact. 160× More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030082
EISBN: 978-1-62708-282-2
... in which a large difference in equilibrium potential exists between the alloying components, and the fraction of the less noble constituent(s) is significantly high. Dezincification The dezincification of brass is the most well-studied dealloying system, receiving considerable attention after...
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
... in which the more anodic alloying element is selectively removed from the alloy, leaving behind a porous, spongy mass. Specific categories of dealloying are often known by the name of the dissolved element. The preferential leaching of zinc from brass is known as dezincification, while the loss of iron...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610501
EISBN: 978-1-62708-303-4
... process in which the more-anodic alloying element is selectively removed from the alloy, leaving behind a porous, spongy mass. Specific categories of dealloying are often known by the name of the dissolved element. The preferential leaching of zinc from brass is known as dezincification, while the loss...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910099
EISBN: 978-1-62708-250-1
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240469
EISBN: 978-1-62708-251-8
... brasses include tin in amounts up to 1.0 wt% to improve corrosion resistance; small amounts of arsenic (0.01 to 0.05 wt%) to improve corrosion resistance and inhibit dezincification; up to 2.0 wt% Pb to improve machinability; up to 2.0 wt% Al to provide corrosion resistance, particularly to impingement...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350011
EISBN: 978-1-62708-315-7
... of the dissolved element. For example, the preferential leaching of zinc from brass is called dezincification. If aluminum is removed, the process is called dealuminification, and so forth. In the case of gray iron, dealloying is called graphitic corrosion. In the dealloying process, typically one of two...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2001
DOI: 10.31399/asm.tb.aub.t61170457
EISBN: 978-1-62708-297-6
... switches and sockets, for example); as tube, for lamp components, drain pipe, and plumbing goods; and as rod, for cold-headed fasteners and forgings. The corrosion resistance of brass is adequate for service in most atmospheric environments. However, the alloys are subject to dezincification...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060369
EISBN: 978-1-62708-261-7
... , an element is removed from an alloy through corrosion. The most common example is dezincification , or the removal of zinc from brass. However, many alloys are subject to selective leaching under certain conditions. Elements in an alloy that are more resistant to the environment remain behind. Two...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430027
EISBN: 978-1-62708-253-2
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910497
EISBN: 978-1-62708-250-1
... solution alloy. Also called parting or selective leaching. See also dezincification and graphitic corrosion. depolarization. The removal of factors resisting the current in an elec- trochemical cell. deposit corrosion. Corrosion occurring under or around a discontinu- ous deposit on a metallic surface...
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 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430087
EISBN: 978-1-62708-253-2
... makes them resistant to failure due to dezincification. It has good ductility and cold-forming properties in addition to excellent corrosion resistance in freshwater service. However, admiralty brass is prone to attack by dissolved oxygen and carbon dioxide, leading to pitting corrosion. Admiralty brass...