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cathodic protection system

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910407
EISBN: 978-1-62708-250-1
...Abstract Abstract This article describes in detail the process of corrosion control by cathodic and anodic protection. The discussion covers the basic concept of cathodic and anodic protection systems, their types and equipment used, and the advantages, limitations, and applications...
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
... + (reference) 0 Fe/Fe 2+ −0.44 Zn/Zn 2+ −0.76 Al/Al 3+ −1.66 Mg/Mg 2+ −2.36 More active or anodic Comparison between sacrificial-anode and impressed-current cathodic protection systems Table 2 Comparison between sacrificial-anode and impressed-current cathodic protection...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030247
EISBN: 978-1-62708-282-2
... to corrosion as encountered in applications involving oil and gas exploration and production. This is followed by a section reviewing the methods of corrosion control, namely the proper selection of materials, protective coatings, cathodic protection systems, use of inhibitors, use of nonmetallic materials...
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
... applications have recently been published ( Ref 21 , 22 ). Anodic protection is used to a lesser degree than the other corrosion control techniques, particularly cathodic protection; see the chapter “ Cathodic Protection .” This is because of the limitations on metal-chemical systems for which anodic...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030023
EISBN: 978-1-62708-282-2
..., in a pipeline that is cathodically protected, if a foreign pipeline crosses or passes close to the protected pipeline, current from the cathodic protection system can gather onto the foreign pipeline and then be discharged from the foreign line when it crosses or comes close to the protected pipeline...
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
... Molybdenum Fig. 15.13 Cathodic protection system for a buried steel tank. (a) The original design that caused local failure of a nearby unprotected buried pipeline by stray current corrosion. (b) Improved design. Installation of a second anode and an insulated buss connection provided protection...
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 August 1999
DOI: 10.31399/asm.tb.caaa.t67870075
EISBN: 978-1-62708-299-0
... be caused by close proximity to other buried metal systems that are being protected by an impressed current cathodic protection system. These stray currents can leak onto a buried aluminum structure at one point, then off at another (where corrosion occurs), taking a low-resistance path between the driven...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030338
EISBN: 978-1-62708-282-2
... Pipeline that experienced stray current corrosion caused by inverting the electrical leads to a cathodic protection rectifier Fig. 9 Life model for a colony of stress-corrosion cracks. Source: Ref 17 Fig. 11 Sacrificial anode CP system with distributed magnesium anodes and an above...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350011
EISBN: 978-1-62708-315-7
... and can be used in specialized applications, such as for the interiors of water storage tanks. Pipelines are routinely designed to ensure the electrical continuity necessary for effective functioning of the cathodic protection system. Thus, electrical connections or bonds are required between pipe...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910237
EISBN: 978-1-62708-250-1
... water Not recommended Not recommended Not recommended Painting: chemical treatment, priming, and painting Most economical and effective corrosion prevention Seldom used Fairly effective Special paint systems used Not recommended Not recommended Cathodic protection Not recommended Most...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030089
EISBN: 978-1-62708-282-2
... and the adjacent parent steel, as discussed subsequently. Some of the earliest problems of weld metal corrosion related to ships in arctic waters, where the action of ice abraded the paint to expose bare steel and damaged the anodes, thus rendering the cathodic protection system ineffective. In these cases...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910099
EISBN: 978-1-62708-250-1
... if possible. Water treatments, such as removing suspended solids, the use of biodispersants and biocides in biofouled systems, and the judicious use of inhibitors Cathodic protection Protective coatings such as water-impermeable phenolic resins, epoxies, and other organic compounds, sacrificial...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910363
EISBN: 978-1-62708-250-1
... for compatibility with cathodic protection systems. In addition, resistance to soil stresses may be required. In atmospheric corrosion, resistance to ultraviolet degradation, bacteria, and fungi is sometimes an important consideration. The coating process can be broken down into the following steps...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910427
EISBN: 978-1-62708-250-1
..., inhibitors are used to protect against corrosion, then coupons can be exposed throughout the system and inspected periodically to determine the effectiveness of the inhibitor treatment. On-line corrosion sensors and monitors can report the status of corrosion control and warn of a change in conditions...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.9781627082822
EISBN: 978-1-62708-282-2
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
.... Platinum-titanium anodes are also used in cathodic-protection systems on ships, harbor installations, chemical equipment, water heaters, and pumping systems. Such anodes are also used in a low-cost power system in a 200 kV direct-current power link between Sardinia and the Italian mainland. The durable...
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...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610501
EISBN: 978-1-62708-303-4
... the current requirements and system costs. A good coating also enables a single impressed-current installation to protect many miles of piping. Coal tar enamel, epoxy powder coatings, and vinyl resin are examples of coatings that are most suitable for use with cathodic protection. Exfoliation is a form...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910049
EISBN: 978-1-62708-250-1
... Effect of increasing the concentration of reducible species on the cathodic polarization curve and the corrosion rate of an active metal Fig. 29 Effect of increasing the velocity of the solution for a corroding system under cathodic concentration control Fig. 30 Effect of an anodic...