TY - CONF A1 - Keserovic, A. A1 - Bäßler, Ralph A1 - Kamah, Y. T1 - Suitability of alloyed steels in highly acidic geothermal environments T2 - Corrosion 2014 N2 - This study aims to evaluate which of the materials currently available on the market could overcome the Problem of corrosion and withstand highly aggressive conditions in the exploitation of geothermal resources in volcanic environments. Our investigations were triggered by the conditions on Lahendong geothermal field (North Sulawesi, Indonesia): well LHD-23 presents one of the greatest challenges due to its capacity of producing > 20 MWe of energy from a single well and in the same time having very low pH (2-3) and relatively high Chloride (1,500 mg/L) and sulphate (1,600 mg/L) concentration. Three different Steel grades (low-alloyed Steel UNS G41300, stainless Steel UNS S31603 and high-alloyed stainless Steel UNS N08031) were selected, and their corrosion behavior was evaluated by means of short-term electrochemical methods (potentiodynamic polarization) and long-term exposure tests (up to 6 months). The research was carried out in the laboratory under stagnant conditions in the artificial LHD-23 geothermal brine (1,500 mg/L Chlorides, 1,600 mg/L sulphates, pH 2) at 100 °C (100 kPa) and 175 °C (900 kPa), simulating the conditions present at the site. T2 - Corrosion 2014 CY - San Antonio, TX, USA DA - 09.03.2014 KW - Geothermal KW - Corrosion KW - Carbon steel KW - Stainless steel KW - Electrochemistry PY - 2014 SP - Paper 4031, 1 EP - 14 AN - OPUS4-30542 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -