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lead anodes

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Published: 01 December 2006
Fig. 2.2 Extruded sections and tubes in lead base and tin alloys for use as anodes for the electrochemical coating, supply tubes for aggressive media, materials for seals and radiation protection, etc. Source: Collin More
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Published: 01 December 2015
Fig. 15 Corrosion of aluminum anodes. (a) Uneven corrosion of aluminum anode, the result in part of improper foundry practice leading to segregation of alloying elements. (b) Uniform corrosion of aluminum anode as the result of proper foundry practice. Courtesy of Jack Smart, John S. Smart More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910407
EISBN: 978-1-62708-250-1
.... The more active metal is called a sacrificial anode. Coupling two dissimilar metals in the same environment can lead to accelerated corrosion of the more active metal and protection of the less active (more noble) one. Although galvanic corrosion is generally considered a nuisance, it can be used...
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
... ions such as copper, mercury, or lead. Some aluminum alloys are used for sacrificial anodes in seawater. An active, anodic alloy is used to clad aluminum, protecting it against pitting in some applications. Fig. 2 Galvanic corrosion of aluminum shielding in buried telephone cable coupled...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ems.t53730129
EISBN: 978-1-62708-283-9
...) and direct corrosion (attack in air). Corrosion in Water Solutions Aqueous corrosion always involves an electrolytic cell with a cathode and an anode ( Fig. 12.1 ). It is the opposite of electroplating. The anode is where ions go into solution M → M +n + ne − . The cathode is where electrons...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030165
EISBN: 978-1-62708-282-2
... Abstract The basic concept for most methods of corrosion protection is to remove one or more of the electrochemical cell components so that the pure metal or metal alloy of interest will not corrode. Another widely used corrosion protection approach is to change the nature of the anode so...
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
... of the sign convention chosen, the important point is that electrons should flow into the protected structure from the external circuit. Anode Materials Different requirements for sacrificial anodes and impressed-current anodes lead to the use of different materials for these applications. Sacrificial...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2000
DOI: 10.31399/asm.tb.fec.t65940127
EISBN: 978-1-62708-302-7
... and nonhomogeneous alloys where different phases or nonuniform compositions within a single phase provide preferred anodic or cathodic sites. And finally, there is the classic case of iron rivets in essentially inert copper leading to the iron being almost exclusively anodic and corroding, the cathodic reaction...
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
... contain dissimilar metals such as gray cast iron, aluminum, copper, brass, tin-lead solder, and steel. Corrosion inhibitors function by interfering with either the anodic or cathodic reactions, or both. Adequate conductivity in both the metal and the electrolyte is required for continuation...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.caaa.t67870191
EISBN: 978-1-62708-299-0
... that Accelerate Corrosion Location Exposure to winds and airborne particulates can lead to deterioration of structures. Designs that leave structures exposed to the elements should be carefully reviewed, because atmospheric corrosion is significantly affected by temperature, relative humidity, rainfall...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610501
EISBN: 978-1-62708-303-4
... surface to another part of the same surface. For a current to flow, a complete electrical circuit is required. In a corroding system ( Fig. 1 ), this circuit is made up of four components: The anode is the electrode of an electrolytic cell at which oxidation is the principal reaction. Electrons flow...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630211
EISBN: 978-1-62708-270-9
... and corrosion prevention during 2012 will cost approximately $961 billion in the United States alone. Although these numbers may now be somewhat inaccurate, the staggering figures show that corrosion is enormously costly to society. In some cases, corrosion can result in catastrophic failures that lead to loss...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910021
EISBN: 978-1-62708-250-1
... There are four requirements for an electrochemical corrosion cell. These are shown schematically in Fig. 2 , where an anode and a cathode on the metal surface in contact with the solution are indicated. The anode and cathode are connected through the solution by an ionic current path, and they are connected...
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...
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 2015
DOI: 10.31399/asm.tb.cpi2.t55030169
EISBN: 978-1-62708-282-2
... Abstract This chapter addresses the general effects of composition, mechanical treatment, surface treatment, processing, and fabrication operations on the corrosion resistance of aluminum and its alloys. Different types of surface treatments covered include claddings, anodizing, and conversion...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2019
DOI: 10.31399/asm.tb.mfadr7.t91110587
EISBN: 978-1-62708-247-1
..., from portable electronics to pacemakers, high reliability of these systems is expected and demanded. Passive components might not be the “brains” of these electronic systems, however, failure of any of these could result in a partial to complete electronic system shutdown. These malfunctions lead...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.caaa.t67870075
EISBN: 978-1-62708-299-0
... electroplate has about the same action as stainless steel. Lead can be used with aluminum except in severe marine atmospheres. For example, lead washers can be used on aluminum nails to secure aluminum sheet in all but the most corrosive atmospheres. In unusual environments aluminum is anodic to zinc...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1984
DOI: 10.31399/asm.tb.mpp.t67850562
EISBN: 978-1-62708-260-0
... for antimony Electrolyte composition 1. 300 mL methanol 50 mL H 2 S 0 4 30 mL HCL Current density Voltage dc 6-10 Conditions Temp., °C Time, min Room temp. 2-4 Comments Use for pure Sb. Use platinum for cathode and anode lead wires. Polish through to a fine abrasive. Agitate electropolishing solution. Do...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910497
EISBN: 978-1-62708-250-1
... by a difference in concentration of some component in the electrolyte. This difference leads to the formation of discrete cathode and anode regions. concentration polarization. That portion of the polarization of a cell produced by concentration changes resulting from passage of current through the electrolyte...