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Lessons learned from long-term corrosion investigations and –monitoring in saline thermal waters
(2018)
Investigations of corrosion processes in geothermal well in Groß Schönebeck showed
Most tested materials (apart of carbon steel) proved to be corrosion resistant within the installations.
- Stability of coatings cannot be guaranteed.
- Main risk: Electrochemical corrosion of carbon steel casing with dissolved Cu resulting in clogging the reservoir
The corrosion prevention strategy requires use of higher alloyed casing materials depending on resistance parameters, availability and economic feasibility.