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galvanic attack

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030172
EISBN: 978-1-62708-282-2
...-metal contamination, blast residues, flux inclusions, and galvanic attack. corrosion resistance magnesium alloys chemical composition heat treatment grain size cold working heavy-metal contamination blast residues flux inclusions galvanic attack MAGNESIUM AND MAGNESIUM ALLOYS...
Image
Published: 01 December 2015
component is cut. When necessary, the cathodic component of a couple should be coated. (e) Ion transfer through a fluid can result in galvanic attack of less noble metals. In the example shown at left, copper ions from the copper heater coil could deposit on the aluminum stirrer. A nonmetallic stirrer would More
Image
Published: 01 August 1999
is cut. When necessary, the cathodic component of a couple should be coated. (e) Ion transfer through a fluid can result in galvanic attack of less noble metals. In the example shown at left, copper ions from the copper heater coil could deposit on the aluminum stirrer. A nonmetallic stirrer would More
Image
Published: 01 August 1999
is cut. When necessary, the cathodic component of a couple should be coated. (e) Ion transfer through a fluid can result in galvanic attack of less noble metals. In the example shown at left, copper ions from the copper heater coil could deposit on the aluminum stirrer. A nonmetallic stirrer would More
Image
Published: 01 January 2000
is cut. When necessary, the cathodic component of a couple should be coated. (e) Ion transfer through a fluid can result in galvanic attack of less noble metals. In the example shown at left, Cu + ions from the copper heater coil could deposit on the aluminum stirrer. A nonmetallic stirrer may More
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
... relationships, followed by a brief section on polarization of metals or alloys. The effects of area, distance, and geometric shapes on galvanic-corrosion behavior are then discussed. Various alloys susceptible to galvanic corrosion are briefly reviewed. The chapter also discusses various modes of attack...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030070
EISBN: 978-1-62708-282-2
... the initial dissolution occurs in the particle, as opposed to the surrounding matrix. The net effect is similar, in that a pit is initiated at the location of galvanic attack. More discussion of the impact of these copper-bearing particles on corrosion performance is included in the section on 2 xxx alloys...
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 that the resistance can be extended into the “reducing-acid” region by adding a small amount of palladium. It describes how different grades of titanium respond to different forms of attack, including uniform, crevice, and galvanic corrosion. It also identifies applications where corrosion is often a concern...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.caaa.t67870075
EISBN: 978-1-62708-299-0
... characteristics of the two metals. Although Fig. 4 can be used to predict which metal suffers galvanic attack when compared with another, the extent of attack cannot be predicted because of polarization. For example, the potential difference between aluminum and stainless steel is greater than that between...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910099
EISBN: 978-1-62708-250-1
... around corners. This is simply an extension of the principle described previously, in which the current takes the path of least resistance. Situations That Promote Galvanic Attack Galvanic corrosion of the anodic member(s) of a couple may take the form of either general or localized corrosion...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550141
EISBN: 978-1-62708-307-2
... position on the galvanic series, and as such, there is always the strong potential for corrosion. A severely corroded magnesium part is shown in Fig. 3.5 . The impurity elements nickel, iron, and copper must be held to low levels to minimize corrosion. The effect of iron on the corrosion susceptibility...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930189
EISBN: 978-1-62708-359-1
... aluminum alloys, however, form narrow anodic regions in the heat-affected zone and are prone to localized attack. Alloys 7005 and 7039 are particularly susceptible to this problem ( Fig. 3c ). There are a number of other common weld deposit/base metal combinations that are known to form galvanic...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030005
EISBN: 978-1-62708-282-2
.... 4 ). Fig. 4 Schematic presentation of corrosion reaction in galvanic coupling of zinc and platinum A very dangerous type of atmospheric corrosion attack is metal cracking, which can occur when a metal structure such as a bridge is exposed to a corrosive environment and continuous...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030235
EISBN: 978-1-62708-282-2
... of a couple should be coated. (e) Ion transfer through a fluid can result in galvanic attack of less noble metals. In the example shown at left, copper ions from the copper heater coil could deposit on the aluminum stirrer. A nonmetallic stirrer would be better. In the center, the distance from a metal...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910301
EISBN: 978-1-62708-250-1
... component is cut. When necessary, the cathodic component of a couple should be coated. (e) Ion transfer through a fluid can result in galvanic attack of less noble metals. In the example shown at left, Cu + ions from the copper heater coil could deposit on the aluminum stirrer. A nonmetallic stirrer may...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.cw.t51820001
EISBN: 978-1-62708-339-3
... the susceptibility to selective corrosion attack. Plain carbon steel weldments can also exhibit galvanic attack. For example, the E6013 welding electrode is known to be highly anodic to A285 base metal in a seawater environment ( Ref 6 ). It is important to select a suitable filler metal when an application...
Image
Published: 01 December 2015
Fig. 2 Schematic presentation of the corrosion galvanic cell created in a zinc-copper alloy in an acid environment. The cathode is the copper-rich phase and the anode is the zinc-rich phase. The corrosion attack is selective to the zinc-rich phase. More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030089
EISBN: 978-1-62708-282-2
... Abstract This chapter describes issues related to corrosion of carbon steel weldments and remedial measures that have proven successful in specific cases. The forms of corrosion covered includes preferential heat affected zone corrosion, preferential weld metal corrosion, and galvanic corrosion...
Image
Published: 01 August 1999
Fig. 3 Cosmetic corrosion performance for aluminum alloys, galvanized steel (Galv), and cold-rolled steel (CRS) in various test environments, as quantified by total area of corrosion damage. Because for most environments, the magnitude of attack for steels is considerably greater than More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350011
EISBN: 978-1-62708-315-7
... are surrounded by metal that is depleted in chromium; therefore, they are more rapidly attacked at these zones than on undepleted metal surfaces. Impurities that segregate at grain boundaries may promote galvanic action in a corrosive environment by serving as anodic or cathodic sites. Therefore, this would...