| Title | A Corrosometer Study of Corrosion in Rotorua Geothermal Fluids |
|---|---|
| Authors | Wells, D.B. and Lichti, K.A. |
| Year | 1985 |
| Conference | New Zealand Geothermal Workshop |
| Keywords | |
| Abstract | Corrosion performance and reliability will be of primary importance in the specification of materials for new process equipment for the more efficient use of geothermal energy in Rotorua. Electrical resistance Corrosometer probes were used to evaluate tli& materials performance of three commonly specified alloys in a range of geothermal environments derived from wells in the Rotorua area. In addition, a detailed study of the control valves being field tested by the Rotorua Geothermal Task Force was carried out to assess the reliability aspects of the materials exposed to the geothermal fluids . Tile Performance of tne test materials was found to be strongly dependent on fluid aeration . steel and C26000 brass exhibited low corrosion rates in non- aerated fluids . The stainless steel alloy S31600 suffered pitting corrosion at high temperatures in aerated fluids. Control valve failures were attributable to inadequate corrosion resistance, scalinq, and build-up of corrosion products/scale causing seizure. |