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Investigating underground corrosion processes

Geothermal research laboratory at Groß Schönebeck

Deep geothermal plants in northern and southwestern Germany often work with highly saline thermal waters. The high salt content and pressure, dissolved gases and the temperature level mean that all plant components are at a high risk of corrosion. At the geothermal research plant at Groß Schönebeck, the German Research Centre for Geosciences in Potsdam is systemically investigating this issue. The BINE-Projektinfo brochure "Corrosion in geothermal plants" (06/2012) presents this work, which involves continually monitoring the physical and chemical parameters of the underground water and testing the corrosion resistance of different materials.

To ensure the reliable and economic operation of geothermal plants, it is important to know the precise composition of the deep waters (fluids) in order to be able to estimate the possible physical and chemical fluid interactions. For this reason, a geothermal plant is operated under realistic conditions at Groß Schönebeck in which the fluid and gas monitoring is conducted during the ongoing operation. The facility also has several corrosion test tracks. Here the corrosion resistance of components and material samples, including various steel types and nickel alloys, are tested until the reactions reach equilibrium on the material surfaces. The intention of the tests is to check the results of previous laboratory investigations under practical conditions.

Its location and high salt content means that the Groß Schönebeck facility is typical for many geothermal sites in Germany. Fluid parameters from plants in other regions are incorporated into the investigations. The intention is to develop a fluid-specific and site-dependent material application catalogue.

Press contact Uwe Milles presse(at)bine.info

About BINE Information Service

Energy research for practical applications

The BINE Information Service reports on energy research topics, such as new materials, systems and components, as well as innovative concepts and methods. The knowledge gained is incorporated into the implementation of new technologies in practice, because first-rate information provides a basis for pioneering decisions, whether in the planning of energy-optimised buildings, increasing the efficiency of industrial processes, or integrating renewable energy sources into existing systems.

About FIZ Karlsruhe

FIZ Karlsruhe - Leibniz Institute for Information Infrastructure is a not-for-profit organization with the public mission to make sci-tech information from all over the world publicly available and to provide related services in order to support the national and international transfer of knowledge and the promotion of innovation. Our business areas: - STN International - the world's leading online service for research and patent information in science and technology - KnowEsis - innovative eScience solutions to support the process of research in all its stages, and throughout all scientific disciplines - Databases and Information Services - Databases and science portals in mathematics, computer science, crystallography, chemistry, and energy technology FIZ Karlsruhe is a member of the Leibniz Association (WGL) which consists of 87 German research and infrastructure institutions.

idw :: 09.08.2012