Comparative analysis and application area of the main materials of anode groundbeds

Issue 25(1) 2020
Pages 15-20

Vyacheslav V. Pershukov, CJSC «Chemservice», Novomoskovsk, Russian Federation


Keywords: underground metal structures, electrochemical protection, anode groundbeds, materials, comparative assessment

http://www.doi.org/10.31615/j.corros.prot.2020.95.1-2

 

Anode groundbeds are intended for use as low-soluble elements of cathodic protection systems against corrosion of main pipelines and other underground metal structures. The classification of Anode groundbeds into deep, subsurface and extended ones indicates the features of their construction and the method of installation. At the time their application area is determined primarily by the material of the working electrode of the Anode groundbed.
With the development of modern technologies, as well as the ability to purchase working elements for anodes on the world market, a large number of new Anode groundbeds from different materials have appeared. In this case, the declared technical characteristics of even the same type of materials from different manufacturers may vary greatly. This situation makes it difficult for design organizations and anti-corrosion protection specialists to select the most suitable Anode groundbeds for specific operating conditions. This article provides an analysis of the performance properties of the main materials of Anode groundbeds and, based on the limitations inherent in each material, provides the recommended area of their application. The materials such as mixed metal oxide (MMO), manganese dioxide, graphite, silicon iron alloy and magnetite are reviewed.