On-site material damage evaluation for low enthalphy geothermal venture based on saline cretaceous formation water
The Maastrichtiaan aquifer, situated at the top of a cretaceous formation, extends over a large area in the north of Belgium. A well situated in the urban centre of Turnhout was put into operation in 1985 in order to supply a thermal power station. In order to evaluate the corrosion and deposition damage which may occur in this geothermal water, a water characterisation and materials test station was connected to the geothermal circuit and operated for periods of two and twelve months. The following conclusions were drawn from the two test periods: - in general, alloyed steels and synthetic materials were affected either slightly or not at all after twelve months of exposure to the geothermal water flow; - the water quality of the geothermal well remained constant, except for occasional oxygen excursions at operation interruptions; - oxygen, chlorine and sulphur were identified as the main agents causing enhanced corrosion of carbon steel, aluminium, hastelloy B and nickel aluminium bronze; - synthetic materials retained larger amounts of deposition products than metallic materials; - the amount of deposited material was higher in the cold leg than in the hot leg of the geothermal circuit.
Bibliographic Reference: EUR 13344 EN (1991) 78 pp., MF, ECU 4
Record Number: 199110178 / Last updated on: 1994-12-02
Original language: en
Available languages: en