| Title | Corrosion in Volcanic Gases |
|---|---|
| Authors | Keith A Lichti, Susan J Swann, Stephen P White, Norio Sanada, Yoshiaki Kurata, Hiroshi Nanjo, Jun Ikeuchi and Bruce W Christenson |
| Year | 1997 |
| Conference | Japan International Geothermal Symposium |
| Keywords | |
| Abstract | Volcanic gas environments on White Island, New Zealand, and Kuju-Iwoyama, Kyushu, Japan, have been used to study the corrosion properties of materials which might be used for engineering plant for energy production from deep-seated and magma-ambient geothermal systems. The corrosion chemistry of gases derived from natural volcanic features varies, from being no more aggressive than conventional geothermal fluids, to being so aggressive that only highly alloyed and expensive materials show suitable resistance. Models of corrosion product phase stability for common alloy elements contained in engineering alloys have been developed for gaseous environments using thermodynamic principles and conventional corrosion theory. These models give reasons for the observed corrosion kinetics and can be used to help to predict the performance of other alloys in similar environments. Deficiencies in the knowledge base for selection of materials for aggressive geothermal environments are identified, and directions for future research on materials having suitable corrosion resistance for anticipated deep-seated and magma-ambient production fluids are proposed. |