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Book Chapter

Published: 01 January 2018
10.5006/37591-ch14
EISBN: 978-1-57590-225-8
ISBN: 978-1-57590-445-0
...In the past, galvanic corrosion has caused numerous failures of equipment in service, some of them very costly. This chapter describes the causes of galvanic corrosion, the main factors affecting its severity, and some preventative measures that can be adopted. For further information, the reader...
Book Chapter
Published: 01 January 2018
10.5006/37617-ch09
EISBN: 978-1-57590-336-1
ISBN: 978-1-57590-455-9
...Discussion of the common types of galvanic (sacrificial) anode materials including performance characteristics, typical applications, and installation details are outlined in this chapter. TYPES OF GALVANIC ANODES FOR PIPELINE USE. The two types of galvanic anode metals commonly used for buried...
Book Chapter

Published: 01 January 2018
10.5006/37636-ch12
EISBN: 978-1-57590-369-9
ISBN: 978-1-57590-459-7
...In the past, galvanic corrosion has caused numerous failures of equipment in service, some of them very costly. This chapter describes the causes of galvanic corrosion, the main factors affecting its severity, and some preventative measures that can be adopted. In the vast majority of cases, duplex...
Book Chapter
Book cover for <span class="search-highlight">Galvanic</span> Corrosion: A Practical Guide for Engineers
Published: 01 January 2017
10.5006/37625-ch08
EISBN: 978-1-57590-353-8
ISBN: 978-1-57590-456-6
...From these data, they produced galvanic series for both hot and cold moderately hard water, which are shown in Figures 8.1 and 8.2 . The heading “stainless steel” covers the four types they tested, i.e., 13% chromium, 18% chromium ferritic, and types 304 and 316 austenitic stainless steels...
Book Chapter
Book cover for <span class="search-highlight">Galvanic</span> Corrosion: A Practical Guide for Engineers

Published: 01 January 2017
10.5006/37625-ch09
EISBN: 978-1-57590-353-8
ISBN: 978-1-57590-456-6
... this combination will behave differently from a combination of bimetallic couples or whether more complex behavior may occur. Combinations of three metals are often referred to as galvanic triangles, and to understand the possible effects of various combinations, it is useful to divide the alloys into groups...
Book Chapter

Published: 01 January 2017
10.5006/37626-ch03
EISBN: 978-1-57590-354-5
ISBN: 978-1-57590-479-5
...DEFINITIONS AND DESCRIPTIONS Galvanic corrosion occurs when a metal or alloy is electrically coupled to another metal or alloy, or to a conducting nonmetal (e.g., carbon or mill scale), in the same electrolyte. The rate of attack of one metal or alloy is usually accelerated, and the corrosion rate...
Book
Book Chapter

Published: 01 January 2016
10.5006/37605-ch06
EISBN: 978-1-57590-318-7
ISBN: 978-1-57590-009-4
...Objective Galvanizing is a very commonly used protective coating for new construction and also for replacement of existing fabricated components in a maintenance program. This chapter gives the protective coatings user a basic understanding of the different types of galvanizing, how it is done...
Images
CP with galvanic anodes (a) active galvanic anode buried in the earth and connected to a pipeline to provide protective current (b) driving voltage measured between an unprotected pipeline and an anode with voltmeter
Published: 01 January 2018
Figure 11.14 CP with galvanic anodes (a) active galvanic anode buried in the earth and connected to a pipeline to provide protective current (b) driving voltage measured between an unprotected pipeline and an anode with voltmeter More about this image found in CP with galvanic anodes (a) active galvanic anode buried in the earth and c...
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The galvanic series, a plot of corrosion potentials versus the saturated calomel reference electrode, in seawater for Mg alloys, Zn alloys, Al alloys, various steels (gray when in the passive state and black when in the active state), Ti alloys, Pt, and graphite/carbon. This figure has been modified from one presented by Jones.6
Published: 01 January 2022
Figure 5.3 The galvanic series, a plot of corrosion potentials versus the saturated calomel reference electrode, in seawater for Mg alloys, Zn alloys, Al alloys, various steels (gray when in the passive state and black when in the active state), Ti alloys, Pt, and graphite/carbon. This figure has More about this image found in The galvanic series, a plot of corrosion potentials versus the saturated ca...
Images
Cross section of a galvanic couple between heavily sensitized AA5083-H131 (degree of sensitization according to ASTM G67 is 50 mg/cm2) and ASI 4340 steel after corrosion for 100 h in an atmospheric environment controlled at a relative humidity of 98% with 3.5 g/m2 of salt deposited on the surface of the metals. The areas of both electrodes are identical. This image was taken from the published work by Mizuno and Kelly.7
Published: 01 January 2022
Figure 5.4 Cross section of a galvanic couple between heavily sensitized AA5083-H131 (degree of sensitization according to ASTM G67 is 50 mg/cm2) and ASI 4340 steel after corrosion for 100 h in an atmospheric environment controlled at a relative humidity of 98% with 3.5 g/m2 More about this image found in Cross section of a galvanic couple between heavily sensitized AA5083-H131 (...
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Examples of different galvanic anodes mounted in a tank: (A) cylindrical anodes suspended from a ceiling, and (B) block anodes mounted on threaded rod to tank floor.
Published: 01 January 2020
Figure 7.19. Examples of different galvanic anodes mounted in a tank: (A) cylindrical anodes suspended from a ceiling, and (B) block anodes mounted on threaded rod to tank floor. More about this image found in Examples of different galvanic anodes mounted in a tank: (A) cylindrical an...
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Galvanic anodes installed on an offshore structural steel (or “jacket”).
Published: 01 January 2020
Figure 7.21. Galvanic anodes installed on an offshore structural steel (or “jacket”). Photograph provided courtesy of NACE International. More about this image found in Galvanic anodes installed on an offshore structural steel (or “jacket”). ...
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Galvanic anode retrofit system for an offshore installation.
Published: 01 January 2020
Figure 7.22. Galvanic anode retrofit system for an offshore installation. Photograph provided courtesy of Deepwater Corrosion Services. More about this image found in Galvanic anode retrofit system for an offshore installation. Photo...