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By R.H. Moeller and C.J. Cron. A large-scale corrosion test was designed to find the most cost effective alloys for completing the Salton Sea geothermal resource wells in California. A series of Ni-Cr-Mo alloys were tested over several years in three production wells and two injection wells. The various alloys were made into 8 in. (22 cm) outside diameter by 0.400 in. (1.0 cm) wall production casing strings about 1,500 ft. (457 m) long. The well bore was divided into three temperature regimes and several joints of each alloy were tested in each regime. This paper discusses the corrosion effects of the brine on the various alloys for lengthy periods under actual flow conditions. Long-term corrosion tests were also conducted on alloys considered for injection tubing.

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