Cathodic protection with sacrificial anodes

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

On the basis of the theory of bimetallic and multimetallic corrosion, the fundamentals of cathodic protection with sacrificial anodes were discussed. The exact reaction kinetic treatment of the process of this kind of cathodic protection is described. The -0.85 V and the 100 mV polarization criteria are analysed on the basis of the reaction kinetic theory described in this paper. The basic concept of sizing sacrificial anodes, including an experimental method is described. Concepts of the choice of anode materials and the role of anode beds are outlined. The chemical and physical effects (effects of oxidizing agents, organic materials, complex forming agents, catalysts, dry backfill, hydrogen embrittlement, alternating and stray current) disturbing the operation of a cathodic protection system are analysed. The most important technological applications are also reviewed. The application of galvanic anode cathodic protection for protection of pipelines and tanks is briefly summarized. Because of the great attention devoted recently to the corrosion of reinforced concrete structures, a more detailed summary is given. Owing to its importance, a separate summary of the protection of reinforced concrete bridges has been made. Finally, a brief description of microbiologically induced corrosion in cathodic protection is given.

Original languageEnglish
Pages (from-to)231-280
Number of pages50
JournalCorrosion Reviews
Volume24
Issue number3-4
Publication statusPublished - 2006

Fingerprint

Cathodic protection
Anodes
anodes
Corrosion
Reaction kinetics
corrosion
Reinforced concrete
Kinetic theory
Hydrogen embrittlement
reaction kinetics
Concrete bridges
Oxidants
Concrete construction
hydrogen embrittlement
concrete structures
chemical effects
sizing
Pipelines
organic materials
kinetic theory

Keywords

  • Fundamentals
  • Galvanic anode cathodic protection
  • Practical aspects

ASJC Scopus subject areas

  • Mechanical Engineering
  • Metals and Alloys
  • Electrochemistry
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

Cite this

Cathodic protection with sacrificial anodes. / Szabó, S.; Bakos, I.

In: Corrosion Reviews, Vol. 24, No. 3-4, 2006, p. 231-280.

Research output: Contribution to journalArticle

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